ref: 8def766de24e082c74a0012774864badce3c4f51
parent: e002bb99a89897a7787dbc1d217acec54d916ec5
author: levytamar82 <levytamar82@gmail.com>
date: Thu Nov 21 07:31:10 EST 2013
vp9_short_fdct32x32_rd vp9_short_fdct32x32 optimized for AVX2 Change-Id: I6366e84490883b72362f762369d7e5bccb64f02f
--- a/test/dct32x32_test.cc
+++ b/test/dct32x32_test.cc
@@ -258,4 +258,14 @@
make_tuple(&vp9_fdct32x32_rd_sse2,
&vp9_idct32x32_1024_add_sse2, 1)));
#endif
+
+#if HAVE_AVX2
+INSTANTIATE_TEST_CASE_P(
+ AVX2, Trans32x32Test,
+ ::testing::Values(
+ make_tuple(&vp9_fdct32x32_avx2,
+ &vp9_idct32x32_1024_add_sse2, 0),
+ make_tuple(&vp9_fdct32x32_rd_avx2,
+ &vp9_idct32x32_1024_add_sse2, 1)));
+#endif
} // namespace
--- a/vp9/common/vp9_rtcd_defs.sh
+++ b/vp9/common/vp9_rtcd_defs.sh
@@ -698,31 +698,31 @@
# fdct functions
prototype void vp9_short_fht4x4 "const int16_t *input, int16_t *output, int stride, int tx_type"
-specialize vp9_short_fht4x4 sse2
+specialize vp9_short_fht4x4 sse2 avx2
prototype void vp9_short_fht8x8 "const int16_t *input, int16_t *output, int stride, int tx_type"
-specialize vp9_short_fht8x8 sse2
+specialize vp9_short_fht8x8 sse2 avx2
prototype void vp9_short_fht16x16 "const int16_t *input, int16_t *output, int stride, int tx_type"
-specialize vp9_short_fht16x16 sse2
+specialize vp9_short_fht16x16 sse2 avx2
prototype void vp9_fwht4x4 "const int16_t *input, int16_t *output, int stride"
specialize vp9_fwht4x4
prototype void vp9_fdct4x4 "const int16_t *input, int16_t *output, int stride"
-specialize vp9_fdct4x4 sse2
+specialize vp9_fdct4x4 sse2 avx2
prototype void vp9_fdct8x8 "const int16_t *input, int16_t *output, int stride"
-specialize vp9_fdct8x8 sse2
+specialize vp9_fdct8x8 sse2 avx2
prototype void vp9_fdct16x16 "const int16_t *input, int16_t *output, int stride"
-specialize vp9_fdct16x16 sse2
+specialize vp9_fdct16x16 sse2 avx2
prototype void vp9_fdct32x32 "const int16_t *input, int16_t *output, int stride"
-specialize vp9_fdct32x32 sse2
+specialize vp9_fdct32x32 sse2 avx2
prototype void vp9_fdct32x32_rd "const int16_t *input, int16_t *output, int stride"
-specialize vp9_fdct32x32_rd sse2
+specialize vp9_fdct32x32_rd sse2 avx2
#
# Motion search
--- /dev/null
+++ b/vp9/encoder/x86/vp9_dct32x32_avx2.c
@@ -1,0 +1,2710 @@
+/*
+ * Copyright (c) 2012 The WebM project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include <immintrin.h> // AVX2
+#include "vp9/common/vp9_idct.h" // for cospi constants
+#include "vpx_ports/mem.h"
+
+#define pair256_set_epi16(a, b) \
+ _mm256_set_epi16(b, a, b, a, b, a, b, a, b, a, b, a, b, a, b, a)
+
+#define pair256_set_epi32(a, b) \
+ _mm256_set_epi32(b, a, b, a, b, a, b, a)
+
+
+
+
+#if FDCT32x32_HIGH_PRECISION
+static INLINE __m256i k_madd_epi32_avx2(__m256i a, __m256i b) {+ __m256i buf0, buf1;
+ buf0 = _mm256_mul_epu32(a, b);
+ a = _mm256_srli_epi64(a, 32);
+ b = _mm256_srli_epi64(b, 32);
+ buf1 = _mm256_mul_epu32(a, b);
+ return _mm256_add_epi64(buf0, buf1);
+}
+
+static INLINE __m256i k_packs_epi64_avx2(__m256i a, __m256i b) {+ __m256i buf0 = _mm256_shuffle_epi32(a, _MM_SHUFFLE(0, 0, 2, 0));
+ __m256i buf1 = _mm256_shuffle_epi32(b, _MM_SHUFFLE(0, 0, 2, 0));
+ return _mm256_unpacklo_epi64(buf0, buf1);
+}
+#endif
+
+void FDCT32x32_2D_AVX2(const int16_t *input,
+ int16_t *output_org, int stride) {+ // Calculate pre-multiplied strides
+ const int str1 = stride;
+ const int str2 = 2 * stride;
+ const int str3 = 2 * stride + str1;
+ // We need an intermediate buffer between passes.
+ DECLARE_ALIGNED(32, int16_t, intermediate[32 * 32]);
+ // Constants
+ // When we use them, in one case, they are all the same. In all others
+ // it's a pair of them that we need to repeat four times. This is done
+ // by constructing the 32 bit constant corresponding to that pair.
+ const __m256i k__cospi_p16_p16 = _mm256_set1_epi16(+cospi_16_64);
+ const __m256i k__cospi_p16_m16 = pair256_set_epi16(+cospi_16_64, -cospi_16_64);
+ const __m256i k__cospi_m08_p24 = pair256_set_epi16(-cospi_8_64, cospi_24_64);
+ const __m256i k__cospi_m24_m08 = pair256_set_epi16(-cospi_24_64, -cospi_8_64);
+ const __m256i k__cospi_p24_p08 = pair256_set_epi16(+cospi_24_64, cospi_8_64);
+ const __m256i k__cospi_p12_p20 = pair256_set_epi16(+cospi_12_64, cospi_20_64);
+ const __m256i k__cospi_m20_p12 = pair256_set_epi16(-cospi_20_64, cospi_12_64);
+ const __m256i k__cospi_m04_p28 = pair256_set_epi16(-cospi_4_64, cospi_28_64);
+ const __m256i k__cospi_p28_p04 = pair256_set_epi16(+cospi_28_64, cospi_4_64);
+ const __m256i k__cospi_m28_m04 = pair256_set_epi16(-cospi_28_64, -cospi_4_64);
+ const __m256i k__cospi_m12_m20 = pair256_set_epi16(-cospi_12_64, -cospi_20_64);
+ const __m256i k__cospi_p30_p02 = pair256_set_epi16(+cospi_30_64, cospi_2_64);
+ const __m256i k__cospi_p14_p18 = pair256_set_epi16(+cospi_14_64, cospi_18_64);
+ const __m256i k__cospi_p22_p10 = pair256_set_epi16(+cospi_22_64, cospi_10_64);
+ const __m256i k__cospi_p06_p26 = pair256_set_epi16(+cospi_6_64, cospi_26_64);
+ const __m256i k__cospi_m26_p06 = pair256_set_epi16(-cospi_26_64, cospi_6_64);
+ const __m256i k__cospi_m10_p22 = pair256_set_epi16(-cospi_10_64, cospi_22_64);
+ const __m256i k__cospi_m18_p14 = pair256_set_epi16(-cospi_18_64, cospi_14_64);
+ const __m256i k__cospi_m02_p30 = pair256_set_epi16(-cospi_2_64, cospi_30_64);
+ const __m256i k__cospi_p31_p01 = pair256_set_epi16(+cospi_31_64, cospi_1_64);
+ const __m256i k__cospi_p15_p17 = pair256_set_epi16(+cospi_15_64, cospi_17_64);
+ const __m256i k__cospi_p23_p09 = pair256_set_epi16(+cospi_23_64, cospi_9_64);
+ const __m256i k__cospi_p07_p25 = pair256_set_epi16(+cospi_7_64, cospi_25_64);
+ const __m256i k__cospi_m25_p07 = pair256_set_epi16(-cospi_25_64, cospi_7_64);
+ const __m256i k__cospi_m09_p23 = pair256_set_epi16(-cospi_9_64, cospi_23_64);
+ const __m256i k__cospi_m17_p15 = pair256_set_epi16(-cospi_17_64, cospi_15_64);
+ const __m256i k__cospi_m01_p31 = pair256_set_epi16(-cospi_1_64, cospi_31_64);
+ const __m256i k__cospi_p27_p05 = pair256_set_epi16(+cospi_27_64, cospi_5_64);
+ const __m256i k__cospi_p11_p21 = pair256_set_epi16(+cospi_11_64, cospi_21_64);
+ const __m256i k__cospi_p19_p13 = pair256_set_epi16(+cospi_19_64, cospi_13_64);
+ const __m256i k__cospi_p03_p29 = pair256_set_epi16(+cospi_3_64, cospi_29_64);
+ const __m256i k__cospi_m29_p03 = pair256_set_epi16(-cospi_29_64, cospi_3_64);
+ const __m256i k__cospi_m13_p19 = pair256_set_epi16(-cospi_13_64, cospi_19_64);
+ const __m256i k__cospi_m21_p11 = pair256_set_epi16(-cospi_21_64, cospi_11_64);
+ const __m256i k__cospi_m05_p27 = pair256_set_epi16(-cospi_5_64, cospi_27_64);
+ const __m256i k__DCT_CONST_ROUNDING = _mm256_set1_epi32(DCT_CONST_ROUNDING);
+ const __m256i kZero = _mm256_set1_epi16(0);
+ const __m256i kOne = _mm256_set1_epi16(1);
+ // Do the two transform/transpose passes
+ int pass;
+ for (pass = 0; pass < 2; ++pass) {+ // We process sixteen columns (transposed rows in second pass) at a time.
+ int column_start;
+ for (column_start = 0; column_start < 32; column_start += 16) {+ __m256i step1[32];
+ __m256i step2[32];
+ __m256i step3[32];
+ __m256i out[32];
+ // Stage 1
+ // Note: even though all the loads below are aligned, using the aligned
+ // intrinsic make the code slightly slower.
+ if (0 == pass) {+ const int16_t *in = &input[column_start];
+ // step1[i] = (in[ 0 * stride] + in[(32 - 1) * stride]) << 2;
+ // Note: the next four blocks could be in a loop. That would help the
+ // instruction cache but is actually slower.
+ {+ const int16_t *ina = in + 0 * str1;
+ const int16_t *inb = in + 31 * str1;
+ __m256i *step1a = &step1[ 0];
+ __m256i *step1b = &step1[31];
+ const __m256i ina0 = _mm256_loadu_si256((const __m256i *)(ina));
+ const __m256i ina1 = _mm256_loadu_si256((const __m256i *)(ina + str1));
+ const __m256i ina2 = _mm256_loadu_si256((const __m256i *)(ina + str2));
+ const __m256i ina3 = _mm256_loadu_si256((const __m256i *)(ina + str3));
+ const __m256i inb3 = _mm256_loadu_si256((const __m256i *)(inb - str3));
+ const __m256i inb2 = _mm256_loadu_si256((const __m256i *)(inb - str2));
+ const __m256i inb1 = _mm256_loadu_si256((const __m256i *)(inb - str1));
+ const __m256i inb0 = _mm256_loadu_si256((const __m256i *)(inb));
+ step1a[ 0] = _mm256_add_epi16(ina0, inb0);
+ step1a[ 1] = _mm256_add_epi16(ina1, inb1);
+ step1a[ 2] = _mm256_add_epi16(ina2, inb2);
+ step1a[ 3] = _mm256_add_epi16(ina3, inb3);
+ step1b[-3] = _mm256_sub_epi16(ina3, inb3);
+ step1b[-2] = _mm256_sub_epi16(ina2, inb2);
+ step1b[-1] = _mm256_sub_epi16(ina1, inb1);
+ step1b[-0] = _mm256_sub_epi16(ina0, inb0);
+ step1a[ 0] = _mm256_slli_epi16(step1a[ 0], 2);
+ step1a[ 1] = _mm256_slli_epi16(step1a[ 1], 2);
+ step1a[ 2] = _mm256_slli_epi16(step1a[ 2], 2);
+ step1a[ 3] = _mm256_slli_epi16(step1a[ 3], 2);
+ step1b[-3] = _mm256_slli_epi16(step1b[-3], 2);
+ step1b[-2] = _mm256_slli_epi16(step1b[-2], 2);
+ step1b[-1] = _mm256_slli_epi16(step1b[-1], 2);
+ step1b[-0] = _mm256_slli_epi16(step1b[-0], 2);
+ }
+ {+ const int16_t *ina = in + 4 * str1;
+ const int16_t *inb = in + 27 * str1;
+ __m256i *step1a = &step1[ 4];
+ __m256i *step1b = &step1[27];
+ const __m256i ina0 = _mm256_loadu_si256((const __m256i *)(ina));
+ const __m256i ina1 = _mm256_loadu_si256((const __m256i *)(ina + str1));
+ const __m256i ina2 = _mm256_loadu_si256((const __m256i *)(ina + str2));
+ const __m256i ina3 = _mm256_loadu_si256((const __m256i *)(ina + str3));
+ const __m256i inb3 = _mm256_loadu_si256((const __m256i *)(inb - str3));
+ const __m256i inb2 = _mm256_loadu_si256((const __m256i *)(inb - str2));
+ const __m256i inb1 = _mm256_loadu_si256((const __m256i *)(inb - str1));
+ const __m256i inb0 = _mm256_loadu_si256((const __m256i *)(inb));
+ step1a[ 0] = _mm256_add_epi16(ina0, inb0);
+ step1a[ 1] = _mm256_add_epi16(ina1, inb1);
+ step1a[ 2] = _mm256_add_epi16(ina2, inb2);
+ step1a[ 3] = _mm256_add_epi16(ina3, inb3);
+ step1b[-3] = _mm256_sub_epi16(ina3, inb3);
+ step1b[-2] = _mm256_sub_epi16(ina2, inb2);
+ step1b[-1] = _mm256_sub_epi16(ina1, inb1);
+ step1b[-0] = _mm256_sub_epi16(ina0, inb0);
+ step1a[ 0] = _mm256_slli_epi16(step1a[ 0], 2);
+ step1a[ 1] = _mm256_slli_epi16(step1a[ 1], 2);
+ step1a[ 2] = _mm256_slli_epi16(step1a[ 2], 2);
+ step1a[ 3] = _mm256_slli_epi16(step1a[ 3], 2);
+ step1b[-3] = _mm256_slli_epi16(step1b[-3], 2);
+ step1b[-2] = _mm256_slli_epi16(step1b[-2], 2);
+ step1b[-1] = _mm256_slli_epi16(step1b[-1], 2);
+ step1b[-0] = _mm256_slli_epi16(step1b[-0], 2);
+ }
+ {+ const int16_t *ina = in + 8 * str1;
+ const int16_t *inb = in + 23 * str1;
+ __m256i *step1a = &step1[ 8];
+ __m256i *step1b = &step1[23];
+ const __m256i ina0 = _mm256_loadu_si256((const __m256i *)(ina));
+ const __m256i ina1 = _mm256_loadu_si256((const __m256i *)(ina + str1));
+ const __m256i ina2 = _mm256_loadu_si256((const __m256i *)(ina + str2));
+ const __m256i ina3 = _mm256_loadu_si256((const __m256i *)(ina + str3));
+ const __m256i inb3 = _mm256_loadu_si256((const __m256i *)(inb - str3));
+ const __m256i inb2 = _mm256_loadu_si256((const __m256i *)(inb - str2));
+ const __m256i inb1 = _mm256_loadu_si256((const __m256i *)(inb - str1));
+ const __m256i inb0 = _mm256_loadu_si256((const __m256i *)(inb));
+ step1a[ 0] = _mm256_add_epi16(ina0, inb0);
+ step1a[ 1] = _mm256_add_epi16(ina1, inb1);
+ step1a[ 2] = _mm256_add_epi16(ina2, inb2);
+ step1a[ 3] = _mm256_add_epi16(ina3, inb3);
+ step1b[-3] = _mm256_sub_epi16(ina3, inb3);
+ step1b[-2] = _mm256_sub_epi16(ina2, inb2);
+ step1b[-1] = _mm256_sub_epi16(ina1, inb1);
+ step1b[-0] = _mm256_sub_epi16(ina0, inb0);
+ step1a[ 0] = _mm256_slli_epi16(step1a[ 0], 2);
+ step1a[ 1] = _mm256_slli_epi16(step1a[ 1], 2);
+ step1a[ 2] = _mm256_slli_epi16(step1a[ 2], 2);
+ step1a[ 3] = _mm256_slli_epi16(step1a[ 3], 2);
+ step1b[-3] = _mm256_slli_epi16(step1b[-3], 2);
+ step1b[-2] = _mm256_slli_epi16(step1b[-2], 2);
+ step1b[-1] = _mm256_slli_epi16(step1b[-1], 2);
+ step1b[-0] = _mm256_slli_epi16(step1b[-0], 2);
+ }
+ {+ const int16_t *ina = in + 12 * str1;
+ const int16_t *inb = in + 19 * str1;
+ __m256i *step1a = &step1[12];
+ __m256i *step1b = &step1[19];
+ const __m256i ina0 = _mm256_loadu_si256((const __m256i *)(ina));
+ const __m256i ina1 = _mm256_loadu_si256((const __m256i *)(ina + str1));
+ const __m256i ina2 = _mm256_loadu_si256((const __m256i *)(ina + str2));
+ const __m256i ina3 = _mm256_loadu_si256((const __m256i *)(ina + str3));
+ const __m256i inb3 = _mm256_loadu_si256((const __m256i *)(inb - str3));
+ const __m256i inb2 = _mm256_loadu_si256((const __m256i *)(inb - str2));
+ const __m256i inb1 = _mm256_loadu_si256((const __m256i *)(inb - str1));
+ const __m256i inb0 = _mm256_loadu_si256((const __m256i *)(inb));
+ step1a[ 0] = _mm256_add_epi16(ina0, inb0);
+ step1a[ 1] = _mm256_add_epi16(ina1, inb1);
+ step1a[ 2] = _mm256_add_epi16(ina2, inb2);
+ step1a[ 3] = _mm256_add_epi16(ina3, inb3);
+ step1b[-3] = _mm256_sub_epi16(ina3, inb3);
+ step1b[-2] = _mm256_sub_epi16(ina2, inb2);
+ step1b[-1] = _mm256_sub_epi16(ina1, inb1);
+ step1b[-0] = _mm256_sub_epi16(ina0, inb0);
+ step1a[ 0] = _mm256_slli_epi16(step1a[ 0], 2);
+ step1a[ 1] = _mm256_slli_epi16(step1a[ 1], 2);
+ step1a[ 2] = _mm256_slli_epi16(step1a[ 2], 2);
+ step1a[ 3] = _mm256_slli_epi16(step1a[ 3], 2);
+ step1b[-3] = _mm256_slli_epi16(step1b[-3], 2);
+ step1b[-2] = _mm256_slli_epi16(step1b[-2], 2);
+ step1b[-1] = _mm256_slli_epi16(step1b[-1], 2);
+ step1b[-0] = _mm256_slli_epi16(step1b[-0], 2);
+ }
+ } else {+ int16_t *in = &intermediate[column_start];
+ // step1[i] = in[ 0 * 32] + in[(32 - 1) * 32];
+ // Note: using the same approach as above to have common offset is
+ // counter-productive as all offsets can be calculated at compile
+ // time.
+ // Note: the next four blocks could be in a loop. That would help the
+ // instruction cache but is actually slower.
+ {+ __m256i in00 = _mm256_loadu_si256((const __m256i *)(in + 0 * 32));
+ __m256i in01 = _mm256_loadu_si256((const __m256i *)(in + 1 * 32));
+ __m256i in02 = _mm256_loadu_si256((const __m256i *)(in + 2 * 32));
+ __m256i in03 = _mm256_loadu_si256((const __m256i *)(in + 3 * 32));
+ __m256i in28 = _mm256_loadu_si256((const __m256i *)(in + 28 * 32));
+ __m256i in29 = _mm256_loadu_si256((const __m256i *)(in + 29 * 32));
+ __m256i in30 = _mm256_loadu_si256((const __m256i *)(in + 30 * 32));
+ __m256i in31 = _mm256_loadu_si256((const __m256i *)(in + 31 * 32));
+ step1[ 0] = _mm256_add_epi16(in00, in31);
+ step1[ 1] = _mm256_add_epi16(in01, in30);
+ step1[ 2] = _mm256_add_epi16(in02, in29);
+ step1[ 3] = _mm256_add_epi16(in03, in28);
+ step1[28] = _mm256_sub_epi16(in03, in28);
+ step1[29] = _mm256_sub_epi16(in02, in29);
+ step1[30] = _mm256_sub_epi16(in01, in30);
+ step1[31] = _mm256_sub_epi16(in00, in31);
+ }
+ {+ __m256i in04 = _mm256_loadu_si256((const __m256i *)(in + 4 * 32));
+ __m256i in05 = _mm256_loadu_si256((const __m256i *)(in + 5 * 32));
+ __m256i in06 = _mm256_loadu_si256((const __m256i *)(in + 6 * 32));
+ __m256i in07 = _mm256_loadu_si256((const __m256i *)(in + 7 * 32));
+ __m256i in24 = _mm256_loadu_si256((const __m256i *)(in + 24 * 32));
+ __m256i in25 = _mm256_loadu_si256((const __m256i *)(in + 25 * 32));
+ __m256i in26 = _mm256_loadu_si256((const __m256i *)(in + 26 * 32));
+ __m256i in27 = _mm256_loadu_si256((const __m256i *)(in + 27 * 32));
+ step1[ 4] = _mm256_add_epi16(in04, in27);
+ step1[ 5] = _mm256_add_epi16(in05, in26);
+ step1[ 6] = _mm256_add_epi16(in06, in25);
+ step1[ 7] = _mm256_add_epi16(in07, in24);
+ step1[24] = _mm256_sub_epi16(in07, in24);
+ step1[25] = _mm256_sub_epi16(in06, in25);
+ step1[26] = _mm256_sub_epi16(in05, in26);
+ step1[27] = _mm256_sub_epi16(in04, in27);
+ }
+ {+ __m256i in08 = _mm256_loadu_si256((const __m256i *)(in + 8 * 32));
+ __m256i in09 = _mm256_loadu_si256((const __m256i *)(in + 9 * 32));
+ __m256i in10 = _mm256_loadu_si256((const __m256i *)(in + 10 * 32));
+ __m256i in11 = _mm256_loadu_si256((const __m256i *)(in + 11 * 32));
+ __m256i in20 = _mm256_loadu_si256((const __m256i *)(in + 20 * 32));
+ __m256i in21 = _mm256_loadu_si256((const __m256i *)(in + 21 * 32));
+ __m256i in22 = _mm256_loadu_si256((const __m256i *)(in + 22 * 32));
+ __m256i in23 = _mm256_loadu_si256((const __m256i *)(in + 23 * 32));
+ step1[ 8] = _mm256_add_epi16(in08, in23);
+ step1[ 9] = _mm256_add_epi16(in09, in22);
+ step1[10] = _mm256_add_epi16(in10, in21);
+ step1[11] = _mm256_add_epi16(in11, in20);
+ step1[20] = _mm256_sub_epi16(in11, in20);
+ step1[21] = _mm256_sub_epi16(in10, in21);
+ step1[22] = _mm256_sub_epi16(in09, in22);
+ step1[23] = _mm256_sub_epi16(in08, in23);
+ }
+ {+ __m256i in12 = _mm256_loadu_si256((const __m256i *)(in + 12 * 32));
+ __m256i in13 = _mm256_loadu_si256((const __m256i *)(in + 13 * 32));
+ __m256i in14 = _mm256_loadu_si256((const __m256i *)(in + 14 * 32));
+ __m256i in15 = _mm256_loadu_si256((const __m256i *)(in + 15 * 32));
+ __m256i in16 = _mm256_loadu_si256((const __m256i *)(in + 16 * 32));
+ __m256i in17 = _mm256_loadu_si256((const __m256i *)(in + 17 * 32));
+ __m256i in18 = _mm256_loadu_si256((const __m256i *)(in + 18 * 32));
+ __m256i in19 = _mm256_loadu_si256((const __m256i *)(in + 19 * 32));
+ step1[12] = _mm256_add_epi16(in12, in19);
+ step1[13] = _mm256_add_epi16(in13, in18);
+ step1[14] = _mm256_add_epi16(in14, in17);
+ step1[15] = _mm256_add_epi16(in15, in16);
+ step1[16] = _mm256_sub_epi16(in15, in16);
+ step1[17] = _mm256_sub_epi16(in14, in17);
+ step1[18] = _mm256_sub_epi16(in13, in18);
+ step1[19] = _mm256_sub_epi16(in12, in19);
+ }
+ }
+ // Stage 2
+ {+ step2[ 0] = _mm256_add_epi16(step1[0], step1[15]);
+ step2[ 1] = _mm256_add_epi16(step1[1], step1[14]);
+ step2[ 2] = _mm256_add_epi16(step1[2], step1[13]);
+ step2[ 3] = _mm256_add_epi16(step1[3], step1[12]);
+ step2[ 4] = _mm256_add_epi16(step1[4], step1[11]);
+ step2[ 5] = _mm256_add_epi16(step1[5], step1[10]);
+ step2[ 6] = _mm256_add_epi16(step1[6], step1[ 9]);
+ step2[ 7] = _mm256_add_epi16(step1[7], step1[ 8]);
+ step2[ 8] = _mm256_sub_epi16(step1[7], step1[ 8]);
+ step2[ 9] = _mm256_sub_epi16(step1[6], step1[ 9]);
+ step2[10] = _mm256_sub_epi16(step1[5], step1[10]);
+ step2[11] = _mm256_sub_epi16(step1[4], step1[11]);
+ step2[12] = _mm256_sub_epi16(step1[3], step1[12]);
+ step2[13] = _mm256_sub_epi16(step1[2], step1[13]);
+ step2[14] = _mm256_sub_epi16(step1[1], step1[14]);
+ step2[15] = _mm256_sub_epi16(step1[0], step1[15]);
+ }
+ {+ const __m256i s2_20_0 = _mm256_unpacklo_epi16(step1[27], step1[20]);
+ const __m256i s2_20_1 = _mm256_unpackhi_epi16(step1[27], step1[20]);
+ const __m256i s2_21_0 = _mm256_unpacklo_epi16(step1[26], step1[21]);
+ const __m256i s2_21_1 = _mm256_unpackhi_epi16(step1[26], step1[21]);
+ const __m256i s2_22_0 = _mm256_unpacklo_epi16(step1[25], step1[22]);
+ const __m256i s2_22_1 = _mm256_unpackhi_epi16(step1[25], step1[22]);
+ const __m256i s2_23_0 = _mm256_unpacklo_epi16(step1[24], step1[23]);
+ const __m256i s2_23_1 = _mm256_unpackhi_epi16(step1[24], step1[23]);
+ const __m256i s2_20_2 = _mm256_madd_epi16(s2_20_0, k__cospi_p16_m16);
+ const __m256i s2_20_3 = _mm256_madd_epi16(s2_20_1, k__cospi_p16_m16);
+ const __m256i s2_21_2 = _mm256_madd_epi16(s2_21_0, k__cospi_p16_m16);
+ const __m256i s2_21_3 = _mm256_madd_epi16(s2_21_1, k__cospi_p16_m16);
+ const __m256i s2_22_2 = _mm256_madd_epi16(s2_22_0, k__cospi_p16_m16);
+ const __m256i s2_22_3 = _mm256_madd_epi16(s2_22_1, k__cospi_p16_m16);
+ const __m256i s2_23_2 = _mm256_madd_epi16(s2_23_0, k__cospi_p16_m16);
+ const __m256i s2_23_3 = _mm256_madd_epi16(s2_23_1, k__cospi_p16_m16);
+ const __m256i s2_24_2 = _mm256_madd_epi16(s2_23_0, k__cospi_p16_p16);
+ const __m256i s2_24_3 = _mm256_madd_epi16(s2_23_1, k__cospi_p16_p16);
+ const __m256i s2_25_2 = _mm256_madd_epi16(s2_22_0, k__cospi_p16_p16);
+ const __m256i s2_25_3 = _mm256_madd_epi16(s2_22_1, k__cospi_p16_p16);
+ const __m256i s2_26_2 = _mm256_madd_epi16(s2_21_0, k__cospi_p16_p16);
+ const __m256i s2_26_3 = _mm256_madd_epi16(s2_21_1, k__cospi_p16_p16);
+ const __m256i s2_27_2 = _mm256_madd_epi16(s2_20_0, k__cospi_p16_p16);
+ const __m256i s2_27_3 = _mm256_madd_epi16(s2_20_1, k__cospi_p16_p16);
+ // dct_const_round_shift
+ const __m256i s2_20_4 = _mm256_add_epi32(s2_20_2, k__DCT_CONST_ROUNDING);
+ const __m256i s2_20_5 = _mm256_add_epi32(s2_20_3, k__DCT_CONST_ROUNDING);
+ const __m256i s2_21_4 = _mm256_add_epi32(s2_21_2, k__DCT_CONST_ROUNDING);
+ const __m256i s2_21_5 = _mm256_add_epi32(s2_21_3, k__DCT_CONST_ROUNDING);
+ const __m256i s2_22_4 = _mm256_add_epi32(s2_22_2, k__DCT_CONST_ROUNDING);
+ const __m256i s2_22_5 = _mm256_add_epi32(s2_22_3, k__DCT_CONST_ROUNDING);
+ const __m256i s2_23_4 = _mm256_add_epi32(s2_23_2, k__DCT_CONST_ROUNDING);
+ const __m256i s2_23_5 = _mm256_add_epi32(s2_23_3, k__DCT_CONST_ROUNDING);
+ const __m256i s2_24_4 = _mm256_add_epi32(s2_24_2, k__DCT_CONST_ROUNDING);
+ const __m256i s2_24_5 = _mm256_add_epi32(s2_24_3, k__DCT_CONST_ROUNDING);
+ const __m256i s2_25_4 = _mm256_add_epi32(s2_25_2, k__DCT_CONST_ROUNDING);
+ const __m256i s2_25_5 = _mm256_add_epi32(s2_25_3, k__DCT_CONST_ROUNDING);
+ const __m256i s2_26_4 = _mm256_add_epi32(s2_26_2, k__DCT_CONST_ROUNDING);
+ const __m256i s2_26_5 = _mm256_add_epi32(s2_26_3, k__DCT_CONST_ROUNDING);
+ const __m256i s2_27_4 = _mm256_add_epi32(s2_27_2, k__DCT_CONST_ROUNDING);
+ const __m256i s2_27_5 = _mm256_add_epi32(s2_27_3, k__DCT_CONST_ROUNDING);
+ const __m256i s2_20_6 = _mm256_srai_epi32(s2_20_4, DCT_CONST_BITS);
+ const __m256i s2_20_7 = _mm256_srai_epi32(s2_20_5, DCT_CONST_BITS);
+ const __m256i s2_21_6 = _mm256_srai_epi32(s2_21_4, DCT_CONST_BITS);
+ const __m256i s2_21_7 = _mm256_srai_epi32(s2_21_5, DCT_CONST_BITS);
+ const __m256i s2_22_6 = _mm256_srai_epi32(s2_22_4, DCT_CONST_BITS);
+ const __m256i s2_22_7 = _mm256_srai_epi32(s2_22_5, DCT_CONST_BITS);
+ const __m256i s2_23_6 = _mm256_srai_epi32(s2_23_4, DCT_CONST_BITS);
+ const __m256i s2_23_7 = _mm256_srai_epi32(s2_23_5, DCT_CONST_BITS);
+ const __m256i s2_24_6 = _mm256_srai_epi32(s2_24_4, DCT_CONST_BITS);
+ const __m256i s2_24_7 = _mm256_srai_epi32(s2_24_5, DCT_CONST_BITS);
+ const __m256i s2_25_6 = _mm256_srai_epi32(s2_25_4, DCT_CONST_BITS);
+ const __m256i s2_25_7 = _mm256_srai_epi32(s2_25_5, DCT_CONST_BITS);
+ const __m256i s2_26_6 = _mm256_srai_epi32(s2_26_4, DCT_CONST_BITS);
+ const __m256i s2_26_7 = _mm256_srai_epi32(s2_26_5, DCT_CONST_BITS);
+ const __m256i s2_27_6 = _mm256_srai_epi32(s2_27_4, DCT_CONST_BITS);
+ const __m256i s2_27_7 = _mm256_srai_epi32(s2_27_5, DCT_CONST_BITS);
+ // Combine
+ step2[20] = _mm256_packs_epi32(s2_20_6, s2_20_7);
+ step2[21] = _mm256_packs_epi32(s2_21_6, s2_21_7);
+ step2[22] = _mm256_packs_epi32(s2_22_6, s2_22_7);
+ step2[23] = _mm256_packs_epi32(s2_23_6, s2_23_7);
+ step2[24] = _mm256_packs_epi32(s2_24_6, s2_24_7);
+ step2[25] = _mm256_packs_epi32(s2_25_6, s2_25_7);
+ step2[26] = _mm256_packs_epi32(s2_26_6, s2_26_7);
+ step2[27] = _mm256_packs_epi32(s2_27_6, s2_27_7);
+ }
+
+#if !FDCT32x32_HIGH_PRECISION
+ // dump the magnitude by half, hence the intermediate values are within
+ // the range of 16 bits.
+ if (1 == pass) {+ __m256i s3_00_0 = _mm256_cmpgt_epi16(kZero,step2[ 0]);
+ __m256i s3_01_0 = _mm256_cmpgt_epi16(kZero,step2[ 1]);
+ __m256i s3_02_0 = _mm256_cmpgt_epi16(kZero,step2[ 2]);
+ __m256i s3_03_0 = _mm256_cmpgt_epi16(kZero,step2[ 3]);
+ __m256i s3_04_0 = _mm256_cmpgt_epi16(kZero,step2[ 4]);
+ __m256i s3_05_0 = _mm256_cmpgt_epi16(kZero,step2[ 5]);
+ __m256i s3_06_0 = _mm256_cmpgt_epi16(kZero,step2[ 6]);
+ __m256i s3_07_0 = _mm256_cmpgt_epi16(kZero,step2[ 7]);
+ __m256i s2_08_0 = _mm256_cmpgt_epi16(kZero,step2[ 8]);
+ __m256i s2_09_0 = _mm256_cmpgt_epi16(kZero,step2[ 9]);
+ __m256i s3_10_0 = _mm256_cmpgt_epi16(kZero,step2[10]);
+ __m256i s3_11_0 = _mm256_cmpgt_epi16(kZero,step2[11]);
+ __m256i s3_12_0 = _mm256_cmpgt_epi16(kZero,step2[12]);
+ __m256i s3_13_0 = _mm256_cmpgt_epi16(kZero,step2[13]);
+ __m256i s2_14_0 = _mm256_cmpgt_epi16(kZero,step2[14]);
+ __m256i s2_15_0 = _mm256_cmpgt_epi16(kZero,step2[15]);
+ __m256i s3_16_0 = _mm256_cmpgt_epi16(kZero,step1[16]);
+ __m256i s3_17_0 = _mm256_cmpgt_epi16(kZero,step1[17]);
+ __m256i s3_18_0 = _mm256_cmpgt_epi16(kZero,step1[18]);
+ __m256i s3_19_0 = _mm256_cmpgt_epi16(kZero,step1[19]);
+ __m256i s3_20_0 = _mm256_cmpgt_epi16(kZero,step2[20]);
+ __m256i s3_21_0 = _mm256_cmpgt_epi16(kZero,step2[21]);
+ __m256i s3_22_0 = _mm256_cmpgt_epi16(kZero,step2[22]);
+ __m256i s3_23_0 = _mm256_cmpgt_epi16(kZero,step2[23]);
+ __m256i s3_24_0 = _mm256_cmpgt_epi16(kZero,step2[24]);
+ __m256i s3_25_0 = _mm256_cmpgt_epi16(kZero,step2[25]);
+ __m256i s3_26_0 = _mm256_cmpgt_epi16(kZero,step2[26]);
+ __m256i s3_27_0 = _mm256_cmpgt_epi16(kZero,step2[27]);
+ __m256i s3_28_0 = _mm256_cmpgt_epi16(kZero,step1[28]);
+ __m256i s3_29_0 = _mm256_cmpgt_epi16(kZero,step1[29]);
+ __m256i s3_30_0 = _mm256_cmpgt_epi16(kZero,step1[30]);
+ __m256i s3_31_0 = _mm256_cmpgt_epi16(kZero,step1[31]);
+
+ step2[ 0] = _mm256_sub_epi16(step2[ 0], s3_00_0);
+ step2[ 1] = _mm256_sub_epi16(step2[ 1], s3_01_0);
+ step2[ 2] = _mm256_sub_epi16(step2[ 2], s3_02_0);
+ step2[ 3] = _mm256_sub_epi16(step2[ 3], s3_03_0);
+ step2[ 4] = _mm256_sub_epi16(step2[ 4], s3_04_0);
+ step2[ 5] = _mm256_sub_epi16(step2[ 5], s3_05_0);
+ step2[ 6] = _mm256_sub_epi16(step2[ 6], s3_06_0);
+ step2[ 7] = _mm256_sub_epi16(step2[ 7], s3_07_0);
+ step2[ 8] = _mm256_sub_epi16(step2[ 8], s2_08_0);
+ step2[ 9] = _mm256_sub_epi16(step2[ 9], s2_09_0);
+ step2[10] = _mm256_sub_epi16(step2[10], s3_10_0);
+ step2[11] = _mm256_sub_epi16(step2[11], s3_11_0);
+ step2[12] = _mm256_sub_epi16(step2[12], s3_12_0);
+ step2[13] = _mm256_sub_epi16(step2[13], s3_13_0);
+ step2[14] = _mm256_sub_epi16(step2[14], s2_14_0);
+ step2[15] = _mm256_sub_epi16(step2[15], s2_15_0);
+ step1[16] = _mm256_sub_epi16(step1[16], s3_16_0);
+ step1[17] = _mm256_sub_epi16(step1[17], s3_17_0);
+ step1[18] = _mm256_sub_epi16(step1[18], s3_18_0);
+ step1[19] = _mm256_sub_epi16(step1[19], s3_19_0);
+ step2[20] = _mm256_sub_epi16(step2[20], s3_20_0);
+ step2[21] = _mm256_sub_epi16(step2[21], s3_21_0);
+ step2[22] = _mm256_sub_epi16(step2[22], s3_22_0);
+ step2[23] = _mm256_sub_epi16(step2[23], s3_23_0);
+ step2[24] = _mm256_sub_epi16(step2[24], s3_24_0);
+ step2[25] = _mm256_sub_epi16(step2[25], s3_25_0);
+ step2[26] = _mm256_sub_epi16(step2[26], s3_26_0);
+ step2[27] = _mm256_sub_epi16(step2[27], s3_27_0);
+ step1[28] = _mm256_sub_epi16(step1[28], s3_28_0);
+ step1[29] = _mm256_sub_epi16(step1[29], s3_29_0);
+ step1[30] = _mm256_sub_epi16(step1[30], s3_30_0);
+ step1[31] = _mm256_sub_epi16(step1[31], s3_31_0);
+
+ step2[ 0] = _mm256_add_epi16(step2[ 0], kOne);
+ step2[ 1] = _mm256_add_epi16(step2[ 1], kOne);
+ step2[ 2] = _mm256_add_epi16(step2[ 2], kOne);
+ step2[ 3] = _mm256_add_epi16(step2[ 3], kOne);
+ step2[ 4] = _mm256_add_epi16(step2[ 4], kOne);
+ step2[ 5] = _mm256_add_epi16(step2[ 5], kOne);
+ step2[ 6] = _mm256_add_epi16(step2[ 6], kOne);
+ step2[ 7] = _mm256_add_epi16(step2[ 7], kOne);
+ step2[ 8] = _mm256_add_epi16(step2[ 8], kOne);
+ step2[ 9] = _mm256_add_epi16(step2[ 9], kOne);
+ step2[10] = _mm256_add_epi16(step2[10], kOne);
+ step2[11] = _mm256_add_epi16(step2[11], kOne);
+ step2[12] = _mm256_add_epi16(step2[12], kOne);
+ step2[13] = _mm256_add_epi16(step2[13], kOne);
+ step2[14] = _mm256_add_epi16(step2[14], kOne);
+ step2[15] = _mm256_add_epi16(step2[15], kOne);
+ step1[16] = _mm256_add_epi16(step1[16], kOne);
+ step1[17] = _mm256_add_epi16(step1[17], kOne);
+ step1[18] = _mm256_add_epi16(step1[18], kOne);
+ step1[19] = _mm256_add_epi16(step1[19], kOne);
+ step2[20] = _mm256_add_epi16(step2[20], kOne);
+ step2[21] = _mm256_add_epi16(step2[21], kOne);
+ step2[22] = _mm256_add_epi16(step2[22], kOne);
+ step2[23] = _mm256_add_epi16(step2[23], kOne);
+ step2[24] = _mm256_add_epi16(step2[24], kOne);
+ step2[25] = _mm256_add_epi16(step2[25], kOne);
+ step2[26] = _mm256_add_epi16(step2[26], kOne);
+ step2[27] = _mm256_add_epi16(step2[27], kOne);
+ step1[28] = _mm256_add_epi16(step1[28], kOne);
+ step1[29] = _mm256_add_epi16(step1[29], kOne);
+ step1[30] = _mm256_add_epi16(step1[30], kOne);
+ step1[31] = _mm256_add_epi16(step1[31], kOne);
+
+ step2[ 0] = _mm256_srai_epi16(step2[ 0], 2);
+ step2[ 1] = _mm256_srai_epi16(step2[ 1], 2);
+ step2[ 2] = _mm256_srai_epi16(step2[ 2], 2);
+ step2[ 3] = _mm256_srai_epi16(step2[ 3], 2);
+ step2[ 4] = _mm256_srai_epi16(step2[ 4], 2);
+ step2[ 5] = _mm256_srai_epi16(step2[ 5], 2);
+ step2[ 6] = _mm256_srai_epi16(step2[ 6], 2);
+ step2[ 7] = _mm256_srai_epi16(step2[ 7], 2);
+ step2[ 8] = _mm256_srai_epi16(step2[ 8], 2);
+ step2[ 9] = _mm256_srai_epi16(step2[ 9], 2);
+ step2[10] = _mm256_srai_epi16(step2[10], 2);
+ step2[11] = _mm256_srai_epi16(step2[11], 2);
+ step2[12] = _mm256_srai_epi16(step2[12], 2);
+ step2[13] = _mm256_srai_epi16(step2[13], 2);
+ step2[14] = _mm256_srai_epi16(step2[14], 2);
+ step2[15] = _mm256_srai_epi16(step2[15], 2);
+ step1[16] = _mm256_srai_epi16(step1[16], 2);
+ step1[17] = _mm256_srai_epi16(step1[17], 2);
+ step1[18] = _mm256_srai_epi16(step1[18], 2);
+ step1[19] = _mm256_srai_epi16(step1[19], 2);
+ step2[20] = _mm256_srai_epi16(step2[20], 2);
+ step2[21] = _mm256_srai_epi16(step2[21], 2);
+ step2[22] = _mm256_srai_epi16(step2[22], 2);
+ step2[23] = _mm256_srai_epi16(step2[23], 2);
+ step2[24] = _mm256_srai_epi16(step2[24], 2);
+ step2[25] = _mm256_srai_epi16(step2[25], 2);
+ step2[26] = _mm256_srai_epi16(step2[26], 2);
+ step2[27] = _mm256_srai_epi16(step2[27], 2);
+ step1[28] = _mm256_srai_epi16(step1[28], 2);
+ step1[29] = _mm256_srai_epi16(step1[29], 2);
+ step1[30] = _mm256_srai_epi16(step1[30], 2);
+ step1[31] = _mm256_srai_epi16(step1[31], 2);
+ }
+#endif
+
+#if FDCT32x32_HIGH_PRECISION
+ if (pass == 0) {+#endif
+ // Stage 3
+ {+ step3[0] = _mm256_add_epi16(step2[(8 - 1)], step2[0]);
+ step3[1] = _mm256_add_epi16(step2[(8 - 2)], step2[1]);
+ step3[2] = _mm256_add_epi16(step2[(8 - 3)], step2[2]);
+ step3[3] = _mm256_add_epi16(step2[(8 - 4)], step2[3]);
+ step3[4] = _mm256_sub_epi16(step2[(8 - 5)], step2[4]);
+ step3[5] = _mm256_sub_epi16(step2[(8 - 6)], step2[5]);
+ step3[6] = _mm256_sub_epi16(step2[(8 - 7)], step2[6]);
+ step3[7] = _mm256_sub_epi16(step2[(8 - 8)], step2[7]);
+ }
+ {+ const __m256i s3_10_0 = _mm256_unpacklo_epi16(step2[13], step2[10]);
+ const __m256i s3_10_1 = _mm256_unpackhi_epi16(step2[13], step2[10]);
+ const __m256i s3_11_0 = _mm256_unpacklo_epi16(step2[12], step2[11]);
+ const __m256i s3_11_1 = _mm256_unpackhi_epi16(step2[12], step2[11]);
+ const __m256i s3_10_2 = _mm256_madd_epi16(s3_10_0, k__cospi_p16_m16);
+ const __m256i s3_10_3 = _mm256_madd_epi16(s3_10_1, k__cospi_p16_m16);
+ const __m256i s3_11_2 = _mm256_madd_epi16(s3_11_0, k__cospi_p16_m16);
+ const __m256i s3_11_3 = _mm256_madd_epi16(s3_11_1, k__cospi_p16_m16);
+ const __m256i s3_12_2 = _mm256_madd_epi16(s3_11_0, k__cospi_p16_p16);
+ const __m256i s3_12_3 = _mm256_madd_epi16(s3_11_1, k__cospi_p16_p16);
+ const __m256i s3_13_2 = _mm256_madd_epi16(s3_10_0, k__cospi_p16_p16);
+ const __m256i s3_13_3 = _mm256_madd_epi16(s3_10_1, k__cospi_p16_p16);
+ // dct_const_round_shift
+ const __m256i s3_10_4 = _mm256_add_epi32(s3_10_2, k__DCT_CONST_ROUNDING);
+ const __m256i s3_10_5 = _mm256_add_epi32(s3_10_3, k__DCT_CONST_ROUNDING);
+ const __m256i s3_11_4 = _mm256_add_epi32(s3_11_2, k__DCT_CONST_ROUNDING);
+ const __m256i s3_11_5 = _mm256_add_epi32(s3_11_3, k__DCT_CONST_ROUNDING);
+ const __m256i s3_12_4 = _mm256_add_epi32(s3_12_2, k__DCT_CONST_ROUNDING);
+ const __m256i s3_12_5 = _mm256_add_epi32(s3_12_3, k__DCT_CONST_ROUNDING);
+ const __m256i s3_13_4 = _mm256_add_epi32(s3_13_2, k__DCT_CONST_ROUNDING);
+ const __m256i s3_13_5 = _mm256_add_epi32(s3_13_3, k__DCT_CONST_ROUNDING);
+ const __m256i s3_10_6 = _mm256_srai_epi32(s3_10_4, DCT_CONST_BITS);
+ const __m256i s3_10_7 = _mm256_srai_epi32(s3_10_5, DCT_CONST_BITS);
+ const __m256i s3_11_6 = _mm256_srai_epi32(s3_11_4, DCT_CONST_BITS);
+ const __m256i s3_11_7 = _mm256_srai_epi32(s3_11_5, DCT_CONST_BITS);
+ const __m256i s3_12_6 = _mm256_srai_epi32(s3_12_4, DCT_CONST_BITS);
+ const __m256i s3_12_7 = _mm256_srai_epi32(s3_12_5, DCT_CONST_BITS);
+ const __m256i s3_13_6 = _mm256_srai_epi32(s3_13_4, DCT_CONST_BITS);
+ const __m256i s3_13_7 = _mm256_srai_epi32(s3_13_5, DCT_CONST_BITS);
+ // Combine
+ step3[10] = _mm256_packs_epi32(s3_10_6, s3_10_7);
+ step3[11] = _mm256_packs_epi32(s3_11_6, s3_11_7);
+ step3[12] = _mm256_packs_epi32(s3_12_6, s3_12_7);
+ step3[13] = _mm256_packs_epi32(s3_13_6, s3_13_7);
+ }
+ {+ step3[16] = _mm256_add_epi16(step2[23], step1[16]);
+ step3[17] = _mm256_add_epi16(step2[22], step1[17]);
+ step3[18] = _mm256_add_epi16(step2[21], step1[18]);
+ step3[19] = _mm256_add_epi16(step2[20], step1[19]);
+ step3[20] = _mm256_sub_epi16(step1[19], step2[20]);
+ step3[21] = _mm256_sub_epi16(step1[18], step2[21]);
+ step3[22] = _mm256_sub_epi16(step1[17], step2[22]);
+ step3[23] = _mm256_sub_epi16(step1[16], step2[23]);
+ step3[24] = _mm256_sub_epi16(step1[31], step2[24]);
+ step3[25] = _mm256_sub_epi16(step1[30], step2[25]);
+ step3[26] = _mm256_sub_epi16(step1[29], step2[26]);
+ step3[27] = _mm256_sub_epi16(step1[28], step2[27]);
+ step3[28] = _mm256_add_epi16(step2[27], step1[28]);
+ step3[29] = _mm256_add_epi16(step2[26], step1[29]);
+ step3[30] = _mm256_add_epi16(step2[25], step1[30]);
+ step3[31] = _mm256_add_epi16(step2[24], step1[31]);
+ }
+
+ // Stage 4
+ {+ step1[ 0] = _mm256_add_epi16(step3[ 3], step3[ 0]);
+ step1[ 1] = _mm256_add_epi16(step3[ 2], step3[ 1]);
+ step1[ 2] = _mm256_sub_epi16(step3[ 1], step3[ 2]);
+ step1[ 3] = _mm256_sub_epi16(step3[ 0], step3[ 3]);
+ step1[ 8] = _mm256_add_epi16(step3[11], step2[ 8]);
+ step1[ 9] = _mm256_add_epi16(step3[10], step2[ 9]);
+ step1[10] = _mm256_sub_epi16(step2[ 9], step3[10]);
+ step1[11] = _mm256_sub_epi16(step2[ 8], step3[11]);
+ step1[12] = _mm256_sub_epi16(step2[15], step3[12]);
+ step1[13] = _mm256_sub_epi16(step2[14], step3[13]);
+ step1[14] = _mm256_add_epi16(step3[13], step2[14]);
+ step1[15] = _mm256_add_epi16(step3[12], step2[15]);
+ }
+ {+ const __m256i s1_05_0 = _mm256_unpacklo_epi16(step3[6], step3[5]);
+ const __m256i s1_05_1 = _mm256_unpackhi_epi16(step3[6], step3[5]);
+ const __m256i s1_05_2 = _mm256_madd_epi16(s1_05_0, k__cospi_p16_m16);
+ const __m256i s1_05_3 = _mm256_madd_epi16(s1_05_1, k__cospi_p16_m16);
+ const __m256i s1_06_2 = _mm256_madd_epi16(s1_05_0, k__cospi_p16_p16);
+ const __m256i s1_06_3 = _mm256_madd_epi16(s1_05_1, k__cospi_p16_p16);
+ // dct_const_round_shift
+ const __m256i s1_05_4 = _mm256_add_epi32(s1_05_2, k__DCT_CONST_ROUNDING);
+ const __m256i s1_05_5 = _mm256_add_epi32(s1_05_3, k__DCT_CONST_ROUNDING);
+ const __m256i s1_06_4 = _mm256_add_epi32(s1_06_2, k__DCT_CONST_ROUNDING);
+ const __m256i s1_06_5 = _mm256_add_epi32(s1_06_3, k__DCT_CONST_ROUNDING);
+ const __m256i s1_05_6 = _mm256_srai_epi32(s1_05_4, DCT_CONST_BITS);
+ const __m256i s1_05_7 = _mm256_srai_epi32(s1_05_5, DCT_CONST_BITS);
+ const __m256i s1_06_6 = _mm256_srai_epi32(s1_06_4, DCT_CONST_BITS);
+ const __m256i s1_06_7 = _mm256_srai_epi32(s1_06_5, DCT_CONST_BITS);
+ // Combine
+ step1[5] = _mm256_packs_epi32(s1_05_6, s1_05_7);
+ step1[6] = _mm256_packs_epi32(s1_06_6, s1_06_7);
+ }
+ {+ const __m256i s1_18_0 = _mm256_unpacklo_epi16(step3[18], step3[29]);
+ const __m256i s1_18_1 = _mm256_unpackhi_epi16(step3[18], step3[29]);
+ const __m256i s1_19_0 = _mm256_unpacklo_epi16(step3[19], step3[28]);
+ const __m256i s1_19_1 = _mm256_unpackhi_epi16(step3[19], step3[28]);
+ const __m256i s1_20_0 = _mm256_unpacklo_epi16(step3[20], step3[27]);
+ const __m256i s1_20_1 = _mm256_unpackhi_epi16(step3[20], step3[27]);
+ const __m256i s1_21_0 = _mm256_unpacklo_epi16(step3[21], step3[26]);
+ const __m256i s1_21_1 = _mm256_unpackhi_epi16(step3[21], step3[26]);
+ const __m256i s1_18_2 = _mm256_madd_epi16(s1_18_0, k__cospi_m08_p24);
+ const __m256i s1_18_3 = _mm256_madd_epi16(s1_18_1, k__cospi_m08_p24);
+ const __m256i s1_19_2 = _mm256_madd_epi16(s1_19_0, k__cospi_m08_p24);
+ const __m256i s1_19_3 = _mm256_madd_epi16(s1_19_1, k__cospi_m08_p24);
+ const __m256i s1_20_2 = _mm256_madd_epi16(s1_20_0, k__cospi_m24_m08);
+ const __m256i s1_20_3 = _mm256_madd_epi16(s1_20_1, k__cospi_m24_m08);
+ const __m256i s1_21_2 = _mm256_madd_epi16(s1_21_0, k__cospi_m24_m08);
+ const __m256i s1_21_3 = _mm256_madd_epi16(s1_21_1, k__cospi_m24_m08);
+ const __m256i s1_26_2 = _mm256_madd_epi16(s1_21_0, k__cospi_m08_p24);
+ const __m256i s1_26_3 = _mm256_madd_epi16(s1_21_1, k__cospi_m08_p24);
+ const __m256i s1_27_2 = _mm256_madd_epi16(s1_20_0, k__cospi_m08_p24);
+ const __m256i s1_27_3 = _mm256_madd_epi16(s1_20_1, k__cospi_m08_p24);
+ const __m256i s1_28_2 = _mm256_madd_epi16(s1_19_0, k__cospi_p24_p08);
+ const __m256i s1_28_3 = _mm256_madd_epi16(s1_19_1, k__cospi_p24_p08);
+ const __m256i s1_29_2 = _mm256_madd_epi16(s1_18_0, k__cospi_p24_p08);
+ const __m256i s1_29_3 = _mm256_madd_epi16(s1_18_1, k__cospi_p24_p08);
+ // dct_const_round_shift
+ const __m256i s1_18_4 = _mm256_add_epi32(s1_18_2, k__DCT_CONST_ROUNDING);
+ const __m256i s1_18_5 = _mm256_add_epi32(s1_18_3, k__DCT_CONST_ROUNDING);
+ const __m256i s1_19_4 = _mm256_add_epi32(s1_19_2, k__DCT_CONST_ROUNDING);
+ const __m256i s1_19_5 = _mm256_add_epi32(s1_19_3, k__DCT_CONST_ROUNDING);
+ const __m256i s1_20_4 = _mm256_add_epi32(s1_20_2, k__DCT_CONST_ROUNDING);
+ const __m256i s1_20_5 = _mm256_add_epi32(s1_20_3, k__DCT_CONST_ROUNDING);
+ const __m256i s1_21_4 = _mm256_add_epi32(s1_21_2, k__DCT_CONST_ROUNDING);
+ const __m256i s1_21_5 = _mm256_add_epi32(s1_21_3, k__DCT_CONST_ROUNDING);
+ const __m256i s1_26_4 = _mm256_add_epi32(s1_26_2, k__DCT_CONST_ROUNDING);
+ const __m256i s1_26_5 = _mm256_add_epi32(s1_26_3, k__DCT_CONST_ROUNDING);
+ const __m256i s1_27_4 = _mm256_add_epi32(s1_27_2, k__DCT_CONST_ROUNDING);
+ const __m256i s1_27_5 = _mm256_add_epi32(s1_27_3, k__DCT_CONST_ROUNDING);
+ const __m256i s1_28_4 = _mm256_add_epi32(s1_28_2, k__DCT_CONST_ROUNDING);
+ const __m256i s1_28_5 = _mm256_add_epi32(s1_28_3, k__DCT_CONST_ROUNDING);
+ const __m256i s1_29_4 = _mm256_add_epi32(s1_29_2, k__DCT_CONST_ROUNDING);
+ const __m256i s1_29_5 = _mm256_add_epi32(s1_29_3, k__DCT_CONST_ROUNDING);
+ const __m256i s1_18_6 = _mm256_srai_epi32(s1_18_4, DCT_CONST_BITS);
+ const __m256i s1_18_7 = _mm256_srai_epi32(s1_18_5, DCT_CONST_BITS);
+ const __m256i s1_19_6 = _mm256_srai_epi32(s1_19_4, DCT_CONST_BITS);
+ const __m256i s1_19_7 = _mm256_srai_epi32(s1_19_5, DCT_CONST_BITS);
+ const __m256i s1_20_6 = _mm256_srai_epi32(s1_20_4, DCT_CONST_BITS);
+ const __m256i s1_20_7 = _mm256_srai_epi32(s1_20_5, DCT_CONST_BITS);
+ const __m256i s1_21_6 = _mm256_srai_epi32(s1_21_4, DCT_CONST_BITS);
+ const __m256i s1_21_7 = _mm256_srai_epi32(s1_21_5, DCT_CONST_BITS);
+ const __m256i s1_26_6 = _mm256_srai_epi32(s1_26_4, DCT_CONST_BITS);
+ const __m256i s1_26_7 = _mm256_srai_epi32(s1_26_5, DCT_CONST_BITS);
+ const __m256i s1_27_6 = _mm256_srai_epi32(s1_27_4, DCT_CONST_BITS);
+ const __m256i s1_27_7 = _mm256_srai_epi32(s1_27_5, DCT_CONST_BITS);
+ const __m256i s1_28_6 = _mm256_srai_epi32(s1_28_4, DCT_CONST_BITS);
+ const __m256i s1_28_7 = _mm256_srai_epi32(s1_28_5, DCT_CONST_BITS);
+ const __m256i s1_29_6 = _mm256_srai_epi32(s1_29_4, DCT_CONST_BITS);
+ const __m256i s1_29_7 = _mm256_srai_epi32(s1_29_5, DCT_CONST_BITS);
+ // Combine
+ step1[18] = _mm256_packs_epi32(s1_18_6, s1_18_7);
+ step1[19] = _mm256_packs_epi32(s1_19_6, s1_19_7);
+ step1[20] = _mm256_packs_epi32(s1_20_6, s1_20_7);
+ step1[21] = _mm256_packs_epi32(s1_21_6, s1_21_7);
+ step1[26] = _mm256_packs_epi32(s1_26_6, s1_26_7);
+ step1[27] = _mm256_packs_epi32(s1_27_6, s1_27_7);
+ step1[28] = _mm256_packs_epi32(s1_28_6, s1_28_7);
+ step1[29] = _mm256_packs_epi32(s1_29_6, s1_29_7);
+ }
+ // Stage 5
+ {+ step2[4] = _mm256_add_epi16(step1[5], step3[4]);
+ step2[5] = _mm256_sub_epi16(step3[4], step1[5]);
+ step2[6] = _mm256_sub_epi16(step3[7], step1[6]);
+ step2[7] = _mm256_add_epi16(step1[6], step3[7]);
+ }
+ {+ const __m256i out_00_0 = _mm256_unpacklo_epi16(step1[0], step1[1]);
+ const __m256i out_00_1 = _mm256_unpackhi_epi16(step1[0], step1[1]);
+ const __m256i out_08_0 = _mm256_unpacklo_epi16(step1[2], step1[3]);
+ const __m256i out_08_1 = _mm256_unpackhi_epi16(step1[2], step1[3]);
+ const __m256i out_00_2 = _mm256_madd_epi16(out_00_0, k__cospi_p16_p16);
+ const __m256i out_00_3 = _mm256_madd_epi16(out_00_1, k__cospi_p16_p16);
+ const __m256i out_16_2 = _mm256_madd_epi16(out_00_0, k__cospi_p16_m16);
+ const __m256i out_16_3 = _mm256_madd_epi16(out_00_1, k__cospi_p16_m16);
+ const __m256i out_08_2 = _mm256_madd_epi16(out_08_0, k__cospi_p24_p08);
+ const __m256i out_08_3 = _mm256_madd_epi16(out_08_1, k__cospi_p24_p08);
+ const __m256i out_24_2 = _mm256_madd_epi16(out_08_0, k__cospi_m08_p24);
+ const __m256i out_24_3 = _mm256_madd_epi16(out_08_1, k__cospi_m08_p24);
+ // dct_const_round_shift
+ const __m256i out_00_4 = _mm256_add_epi32(out_00_2, k__DCT_CONST_ROUNDING);
+ const __m256i out_00_5 = _mm256_add_epi32(out_00_3, k__DCT_CONST_ROUNDING);
+ const __m256i out_16_4 = _mm256_add_epi32(out_16_2, k__DCT_CONST_ROUNDING);
+ const __m256i out_16_5 = _mm256_add_epi32(out_16_3, k__DCT_CONST_ROUNDING);
+ const __m256i out_08_4 = _mm256_add_epi32(out_08_2, k__DCT_CONST_ROUNDING);
+ const __m256i out_08_5 = _mm256_add_epi32(out_08_3, k__DCT_CONST_ROUNDING);
+ const __m256i out_24_4 = _mm256_add_epi32(out_24_2, k__DCT_CONST_ROUNDING);
+ const __m256i out_24_5 = _mm256_add_epi32(out_24_3, k__DCT_CONST_ROUNDING);
+ const __m256i out_00_6 = _mm256_srai_epi32(out_00_4, DCT_CONST_BITS);
+ const __m256i out_00_7 = _mm256_srai_epi32(out_00_5, DCT_CONST_BITS);
+ const __m256i out_16_6 = _mm256_srai_epi32(out_16_4, DCT_CONST_BITS);
+ const __m256i out_16_7 = _mm256_srai_epi32(out_16_5, DCT_CONST_BITS);
+ const __m256i out_08_6 = _mm256_srai_epi32(out_08_4, DCT_CONST_BITS);
+ const __m256i out_08_7 = _mm256_srai_epi32(out_08_5, DCT_CONST_BITS);
+ const __m256i out_24_6 = _mm256_srai_epi32(out_24_4, DCT_CONST_BITS);
+ const __m256i out_24_7 = _mm256_srai_epi32(out_24_5, DCT_CONST_BITS);
+ // Combine
+ out[ 0] = _mm256_packs_epi32(out_00_6, out_00_7);
+ out[16] = _mm256_packs_epi32(out_16_6, out_16_7);
+ out[ 8] = _mm256_packs_epi32(out_08_6, out_08_7);
+ out[24] = _mm256_packs_epi32(out_24_6, out_24_7);
+ }
+ {+ const __m256i s2_09_0 = _mm256_unpacklo_epi16(step1[ 9], step1[14]);
+ const __m256i s2_09_1 = _mm256_unpackhi_epi16(step1[ 9], step1[14]);
+ const __m256i s2_10_0 = _mm256_unpacklo_epi16(step1[10], step1[13]);
+ const __m256i s2_10_1 = _mm256_unpackhi_epi16(step1[10], step1[13]);
+ const __m256i s2_09_2 = _mm256_madd_epi16(s2_09_0, k__cospi_m08_p24);
+ const __m256i s2_09_3 = _mm256_madd_epi16(s2_09_1, k__cospi_m08_p24);
+ const __m256i s2_10_2 = _mm256_madd_epi16(s2_10_0, k__cospi_m24_m08);
+ const __m256i s2_10_3 = _mm256_madd_epi16(s2_10_1, k__cospi_m24_m08);
+ const __m256i s2_13_2 = _mm256_madd_epi16(s2_10_0, k__cospi_m08_p24);
+ const __m256i s2_13_3 = _mm256_madd_epi16(s2_10_1, k__cospi_m08_p24);
+ const __m256i s2_14_2 = _mm256_madd_epi16(s2_09_0, k__cospi_p24_p08);
+ const __m256i s2_14_3 = _mm256_madd_epi16(s2_09_1, k__cospi_p24_p08);
+ // dct_const_round_shift
+ const __m256i s2_09_4 = _mm256_add_epi32(s2_09_2, k__DCT_CONST_ROUNDING);
+ const __m256i s2_09_5 = _mm256_add_epi32(s2_09_3, k__DCT_CONST_ROUNDING);
+ const __m256i s2_10_4 = _mm256_add_epi32(s2_10_2, k__DCT_CONST_ROUNDING);
+ const __m256i s2_10_5 = _mm256_add_epi32(s2_10_3, k__DCT_CONST_ROUNDING);
+ const __m256i s2_13_4 = _mm256_add_epi32(s2_13_2, k__DCT_CONST_ROUNDING);
+ const __m256i s2_13_5 = _mm256_add_epi32(s2_13_3, k__DCT_CONST_ROUNDING);
+ const __m256i s2_14_4 = _mm256_add_epi32(s2_14_2, k__DCT_CONST_ROUNDING);
+ const __m256i s2_14_5 = _mm256_add_epi32(s2_14_3, k__DCT_CONST_ROUNDING);
+ const __m256i s2_09_6 = _mm256_srai_epi32(s2_09_4, DCT_CONST_BITS);
+ const __m256i s2_09_7 = _mm256_srai_epi32(s2_09_5, DCT_CONST_BITS);
+ const __m256i s2_10_6 = _mm256_srai_epi32(s2_10_4, DCT_CONST_BITS);
+ const __m256i s2_10_7 = _mm256_srai_epi32(s2_10_5, DCT_CONST_BITS);
+ const __m256i s2_13_6 = _mm256_srai_epi32(s2_13_4, DCT_CONST_BITS);
+ const __m256i s2_13_7 = _mm256_srai_epi32(s2_13_5, DCT_CONST_BITS);
+ const __m256i s2_14_6 = _mm256_srai_epi32(s2_14_4, DCT_CONST_BITS);
+ const __m256i s2_14_7 = _mm256_srai_epi32(s2_14_5, DCT_CONST_BITS);
+ // Combine
+ step2[ 9] = _mm256_packs_epi32(s2_09_6, s2_09_7);
+ step2[10] = _mm256_packs_epi32(s2_10_6, s2_10_7);
+ step2[13] = _mm256_packs_epi32(s2_13_6, s2_13_7);
+ step2[14] = _mm256_packs_epi32(s2_14_6, s2_14_7);
+ }
+ {+ step2[16] = _mm256_add_epi16(step1[19], step3[16]);
+ step2[17] = _mm256_add_epi16(step1[18], step3[17]);
+ step2[18] = _mm256_sub_epi16(step3[17], step1[18]);
+ step2[19] = _mm256_sub_epi16(step3[16], step1[19]);
+ step2[20] = _mm256_sub_epi16(step3[23], step1[20]);
+ step2[21] = _mm256_sub_epi16(step3[22], step1[21]);
+ step2[22] = _mm256_add_epi16(step1[21], step3[22]);
+ step2[23] = _mm256_add_epi16(step1[20], step3[23]);
+ step2[24] = _mm256_add_epi16(step1[27], step3[24]);
+ step2[25] = _mm256_add_epi16(step1[26], step3[25]);
+ step2[26] = _mm256_sub_epi16(step3[25], step1[26]);
+ step2[27] = _mm256_sub_epi16(step3[24], step1[27]);
+ step2[28] = _mm256_sub_epi16(step3[31], step1[28]);
+ step2[29] = _mm256_sub_epi16(step3[30], step1[29]);
+ step2[30] = _mm256_add_epi16(step1[29], step3[30]);
+ step2[31] = _mm256_add_epi16(step1[28], step3[31]);
+ }
+ // Stage 6
+ {+ const __m256i out_04_0 = _mm256_unpacklo_epi16(step2[4], step2[7]);
+ const __m256i out_04_1 = _mm256_unpackhi_epi16(step2[4], step2[7]);
+ const __m256i out_20_0 = _mm256_unpacklo_epi16(step2[5], step2[6]);
+ const __m256i out_20_1 = _mm256_unpackhi_epi16(step2[5], step2[6]);
+ const __m256i out_12_0 = _mm256_unpacklo_epi16(step2[5], step2[6]);
+ const __m256i out_12_1 = _mm256_unpackhi_epi16(step2[5], step2[6]);
+ const __m256i out_28_0 = _mm256_unpacklo_epi16(step2[4], step2[7]);
+ const __m256i out_28_1 = _mm256_unpackhi_epi16(step2[4], step2[7]);
+ const __m256i out_04_2 = _mm256_madd_epi16(out_04_0, k__cospi_p28_p04);
+ const __m256i out_04_3 = _mm256_madd_epi16(out_04_1, k__cospi_p28_p04);
+ const __m256i out_20_2 = _mm256_madd_epi16(out_20_0, k__cospi_p12_p20);
+ const __m256i out_20_3 = _mm256_madd_epi16(out_20_1, k__cospi_p12_p20);
+ const __m256i out_12_2 = _mm256_madd_epi16(out_12_0, k__cospi_m20_p12);
+ const __m256i out_12_3 = _mm256_madd_epi16(out_12_1, k__cospi_m20_p12);
+ const __m256i out_28_2 = _mm256_madd_epi16(out_28_0, k__cospi_m04_p28);
+ const __m256i out_28_3 = _mm256_madd_epi16(out_28_1, k__cospi_m04_p28);
+ // dct_const_round_shift
+ const __m256i out_04_4 = _mm256_add_epi32(out_04_2, k__DCT_CONST_ROUNDING);
+ const __m256i out_04_5 = _mm256_add_epi32(out_04_3, k__DCT_CONST_ROUNDING);
+ const __m256i out_20_4 = _mm256_add_epi32(out_20_2, k__DCT_CONST_ROUNDING);
+ const __m256i out_20_5 = _mm256_add_epi32(out_20_3, k__DCT_CONST_ROUNDING);
+ const __m256i out_12_4 = _mm256_add_epi32(out_12_2, k__DCT_CONST_ROUNDING);
+ const __m256i out_12_5 = _mm256_add_epi32(out_12_3, k__DCT_CONST_ROUNDING);
+ const __m256i out_28_4 = _mm256_add_epi32(out_28_2, k__DCT_CONST_ROUNDING);
+ const __m256i out_28_5 = _mm256_add_epi32(out_28_3, k__DCT_CONST_ROUNDING);
+ const __m256i out_04_6 = _mm256_srai_epi32(out_04_4, DCT_CONST_BITS);
+ const __m256i out_04_7 = _mm256_srai_epi32(out_04_5, DCT_CONST_BITS);
+ const __m256i out_20_6 = _mm256_srai_epi32(out_20_4, DCT_CONST_BITS);
+ const __m256i out_20_7 = _mm256_srai_epi32(out_20_5, DCT_CONST_BITS);
+ const __m256i out_12_6 = _mm256_srai_epi32(out_12_4, DCT_CONST_BITS);
+ const __m256i out_12_7 = _mm256_srai_epi32(out_12_5, DCT_CONST_BITS);
+ const __m256i out_28_6 = _mm256_srai_epi32(out_28_4, DCT_CONST_BITS);
+ const __m256i out_28_7 = _mm256_srai_epi32(out_28_5, DCT_CONST_BITS);
+ // Combine
+ out[ 4] = _mm256_packs_epi32(out_04_6, out_04_7);
+ out[20] = _mm256_packs_epi32(out_20_6, out_20_7);
+ out[12] = _mm256_packs_epi32(out_12_6, out_12_7);
+ out[28] = _mm256_packs_epi32(out_28_6, out_28_7);
+ }
+ {+ step3[ 8] = _mm256_add_epi16(step2[ 9], step1[ 8]);
+ step3[ 9] = _mm256_sub_epi16(step1[ 8], step2[ 9]);
+ step3[10] = _mm256_sub_epi16(step1[11], step2[10]);
+ step3[11] = _mm256_add_epi16(step2[10], step1[11]);
+ step3[12] = _mm256_add_epi16(step2[13], step1[12]);
+ step3[13] = _mm256_sub_epi16(step1[12], step2[13]);
+ step3[14] = _mm256_sub_epi16(step1[15], step2[14]);
+ step3[15] = _mm256_add_epi16(step2[14], step1[15]);
+ }
+ {+ const __m256i s3_17_0 = _mm256_unpacklo_epi16(step2[17], step2[30]);
+ const __m256i s3_17_1 = _mm256_unpackhi_epi16(step2[17], step2[30]);
+ const __m256i s3_18_0 = _mm256_unpacklo_epi16(step2[18], step2[29]);
+ const __m256i s3_18_1 = _mm256_unpackhi_epi16(step2[18], step2[29]);
+ const __m256i s3_21_0 = _mm256_unpacklo_epi16(step2[21], step2[26]);
+ const __m256i s3_21_1 = _mm256_unpackhi_epi16(step2[21], step2[26]);
+ const __m256i s3_22_0 = _mm256_unpacklo_epi16(step2[22], step2[25]);
+ const __m256i s3_22_1 = _mm256_unpackhi_epi16(step2[22], step2[25]);
+ const __m256i s3_17_2 = _mm256_madd_epi16(s3_17_0, k__cospi_m04_p28);
+ const __m256i s3_17_3 = _mm256_madd_epi16(s3_17_1, k__cospi_m04_p28);
+ const __m256i s3_18_2 = _mm256_madd_epi16(s3_18_0, k__cospi_m28_m04);
+ const __m256i s3_18_3 = _mm256_madd_epi16(s3_18_1, k__cospi_m28_m04);
+ const __m256i s3_21_2 = _mm256_madd_epi16(s3_21_0, k__cospi_m20_p12);
+ const __m256i s3_21_3 = _mm256_madd_epi16(s3_21_1, k__cospi_m20_p12);
+ const __m256i s3_22_2 = _mm256_madd_epi16(s3_22_0, k__cospi_m12_m20);
+ const __m256i s3_22_3 = _mm256_madd_epi16(s3_22_1, k__cospi_m12_m20);
+ const __m256i s3_25_2 = _mm256_madd_epi16(s3_22_0, k__cospi_m20_p12);
+ const __m256i s3_25_3 = _mm256_madd_epi16(s3_22_1, k__cospi_m20_p12);
+ const __m256i s3_26_2 = _mm256_madd_epi16(s3_21_0, k__cospi_p12_p20);
+ const __m256i s3_26_3 = _mm256_madd_epi16(s3_21_1, k__cospi_p12_p20);
+ const __m256i s3_29_2 = _mm256_madd_epi16(s3_18_0, k__cospi_m04_p28);
+ const __m256i s3_29_3 = _mm256_madd_epi16(s3_18_1, k__cospi_m04_p28);
+ const __m256i s3_30_2 = _mm256_madd_epi16(s3_17_0, k__cospi_p28_p04);
+ const __m256i s3_30_3 = _mm256_madd_epi16(s3_17_1, k__cospi_p28_p04);
+ // dct_const_round_shift
+ const __m256i s3_17_4 = _mm256_add_epi32(s3_17_2, k__DCT_CONST_ROUNDING);
+ const __m256i s3_17_5 = _mm256_add_epi32(s3_17_3, k__DCT_CONST_ROUNDING);
+ const __m256i s3_18_4 = _mm256_add_epi32(s3_18_2, k__DCT_CONST_ROUNDING);
+ const __m256i s3_18_5 = _mm256_add_epi32(s3_18_3, k__DCT_CONST_ROUNDING);
+ const __m256i s3_21_4 = _mm256_add_epi32(s3_21_2, k__DCT_CONST_ROUNDING);
+ const __m256i s3_21_5 = _mm256_add_epi32(s3_21_3, k__DCT_CONST_ROUNDING);
+ const __m256i s3_22_4 = _mm256_add_epi32(s3_22_2, k__DCT_CONST_ROUNDING);
+ const __m256i s3_22_5 = _mm256_add_epi32(s3_22_3, k__DCT_CONST_ROUNDING);
+ const __m256i s3_17_6 = _mm256_srai_epi32(s3_17_4, DCT_CONST_BITS);
+ const __m256i s3_17_7 = _mm256_srai_epi32(s3_17_5, DCT_CONST_BITS);
+ const __m256i s3_18_6 = _mm256_srai_epi32(s3_18_4, DCT_CONST_BITS);
+ const __m256i s3_18_7 = _mm256_srai_epi32(s3_18_5, DCT_CONST_BITS);
+ const __m256i s3_21_6 = _mm256_srai_epi32(s3_21_4, DCT_CONST_BITS);
+ const __m256i s3_21_7 = _mm256_srai_epi32(s3_21_5, DCT_CONST_BITS);
+ const __m256i s3_22_6 = _mm256_srai_epi32(s3_22_4, DCT_CONST_BITS);
+ const __m256i s3_22_7 = _mm256_srai_epi32(s3_22_5, DCT_CONST_BITS);
+ const __m256i s3_25_4 = _mm256_add_epi32(s3_25_2, k__DCT_CONST_ROUNDING);
+ const __m256i s3_25_5 = _mm256_add_epi32(s3_25_3, k__DCT_CONST_ROUNDING);
+ const __m256i s3_26_4 = _mm256_add_epi32(s3_26_2, k__DCT_CONST_ROUNDING);
+ const __m256i s3_26_5 = _mm256_add_epi32(s3_26_3, k__DCT_CONST_ROUNDING);
+ const __m256i s3_29_4 = _mm256_add_epi32(s3_29_2, k__DCT_CONST_ROUNDING);
+ const __m256i s3_29_5 = _mm256_add_epi32(s3_29_3, k__DCT_CONST_ROUNDING);
+ const __m256i s3_30_4 = _mm256_add_epi32(s3_30_2, k__DCT_CONST_ROUNDING);
+ const __m256i s3_30_5 = _mm256_add_epi32(s3_30_3, k__DCT_CONST_ROUNDING);
+ const __m256i s3_25_6 = _mm256_srai_epi32(s3_25_4, DCT_CONST_BITS);
+ const __m256i s3_25_7 = _mm256_srai_epi32(s3_25_5, DCT_CONST_BITS);
+ const __m256i s3_26_6 = _mm256_srai_epi32(s3_26_4, DCT_CONST_BITS);
+ const __m256i s3_26_7 = _mm256_srai_epi32(s3_26_5, DCT_CONST_BITS);
+ const __m256i s3_29_6 = _mm256_srai_epi32(s3_29_4, DCT_CONST_BITS);
+ const __m256i s3_29_7 = _mm256_srai_epi32(s3_29_5, DCT_CONST_BITS);
+ const __m256i s3_30_6 = _mm256_srai_epi32(s3_30_4, DCT_CONST_BITS);
+ const __m256i s3_30_7 = _mm256_srai_epi32(s3_30_5, DCT_CONST_BITS);
+ // Combine
+ step3[17] = _mm256_packs_epi32(s3_17_6, s3_17_7);
+ step3[18] = _mm256_packs_epi32(s3_18_6, s3_18_7);
+ step3[21] = _mm256_packs_epi32(s3_21_6, s3_21_7);
+ step3[22] = _mm256_packs_epi32(s3_22_6, s3_22_7);
+ // Combine
+ step3[25] = _mm256_packs_epi32(s3_25_6, s3_25_7);
+ step3[26] = _mm256_packs_epi32(s3_26_6, s3_26_7);
+ step3[29] = _mm256_packs_epi32(s3_29_6, s3_29_7);
+ step3[30] = _mm256_packs_epi32(s3_30_6, s3_30_7);
+ }
+ // Stage 7
+ {+ const __m256i out_02_0 = _mm256_unpacklo_epi16(step3[ 8], step3[15]);
+ const __m256i out_02_1 = _mm256_unpackhi_epi16(step3[ 8], step3[15]);
+ const __m256i out_18_0 = _mm256_unpacklo_epi16(step3[ 9], step3[14]);
+ const __m256i out_18_1 = _mm256_unpackhi_epi16(step3[ 9], step3[14]);
+ const __m256i out_10_0 = _mm256_unpacklo_epi16(step3[10], step3[13]);
+ const __m256i out_10_1 = _mm256_unpackhi_epi16(step3[10], step3[13]);
+ const __m256i out_26_0 = _mm256_unpacklo_epi16(step3[11], step3[12]);
+ const __m256i out_26_1 = _mm256_unpackhi_epi16(step3[11], step3[12]);
+ const __m256i out_02_2 = _mm256_madd_epi16(out_02_0, k__cospi_p30_p02);
+ const __m256i out_02_3 = _mm256_madd_epi16(out_02_1, k__cospi_p30_p02);
+ const __m256i out_18_2 = _mm256_madd_epi16(out_18_0, k__cospi_p14_p18);
+ const __m256i out_18_3 = _mm256_madd_epi16(out_18_1, k__cospi_p14_p18);
+ const __m256i out_10_2 = _mm256_madd_epi16(out_10_0, k__cospi_p22_p10);
+ const __m256i out_10_3 = _mm256_madd_epi16(out_10_1, k__cospi_p22_p10);
+ const __m256i out_26_2 = _mm256_madd_epi16(out_26_0, k__cospi_p06_p26);
+ const __m256i out_26_3 = _mm256_madd_epi16(out_26_1, k__cospi_p06_p26);
+ const __m256i out_06_2 = _mm256_madd_epi16(out_26_0, k__cospi_m26_p06);
+ const __m256i out_06_3 = _mm256_madd_epi16(out_26_1, k__cospi_m26_p06);
+ const __m256i out_22_2 = _mm256_madd_epi16(out_10_0, k__cospi_m10_p22);
+ const __m256i out_22_3 = _mm256_madd_epi16(out_10_1, k__cospi_m10_p22);
+ const __m256i out_14_2 = _mm256_madd_epi16(out_18_0, k__cospi_m18_p14);
+ const __m256i out_14_3 = _mm256_madd_epi16(out_18_1, k__cospi_m18_p14);
+ const __m256i out_30_2 = _mm256_madd_epi16(out_02_0, k__cospi_m02_p30);
+ const __m256i out_30_3 = _mm256_madd_epi16(out_02_1, k__cospi_m02_p30);
+ // dct_const_round_shift
+ const __m256i out_02_4 = _mm256_add_epi32(out_02_2, k__DCT_CONST_ROUNDING);
+ const __m256i out_02_5 = _mm256_add_epi32(out_02_3, k__DCT_CONST_ROUNDING);
+ const __m256i out_18_4 = _mm256_add_epi32(out_18_2, k__DCT_CONST_ROUNDING);
+ const __m256i out_18_5 = _mm256_add_epi32(out_18_3, k__DCT_CONST_ROUNDING);
+ const __m256i out_10_4 = _mm256_add_epi32(out_10_2, k__DCT_CONST_ROUNDING);
+ const __m256i out_10_5 = _mm256_add_epi32(out_10_3, k__DCT_CONST_ROUNDING);
+ const __m256i out_26_4 = _mm256_add_epi32(out_26_2, k__DCT_CONST_ROUNDING);
+ const __m256i out_26_5 = _mm256_add_epi32(out_26_3, k__DCT_CONST_ROUNDING);
+ const __m256i out_06_4 = _mm256_add_epi32(out_06_2, k__DCT_CONST_ROUNDING);
+ const __m256i out_06_5 = _mm256_add_epi32(out_06_3, k__DCT_CONST_ROUNDING);
+ const __m256i out_22_4 = _mm256_add_epi32(out_22_2, k__DCT_CONST_ROUNDING);
+ const __m256i out_22_5 = _mm256_add_epi32(out_22_3, k__DCT_CONST_ROUNDING);
+ const __m256i out_14_4 = _mm256_add_epi32(out_14_2, k__DCT_CONST_ROUNDING);
+ const __m256i out_14_5 = _mm256_add_epi32(out_14_3, k__DCT_CONST_ROUNDING);
+ const __m256i out_30_4 = _mm256_add_epi32(out_30_2, k__DCT_CONST_ROUNDING);
+ const __m256i out_30_5 = _mm256_add_epi32(out_30_3, k__DCT_CONST_ROUNDING);
+ const __m256i out_02_6 = _mm256_srai_epi32(out_02_4, DCT_CONST_BITS);
+ const __m256i out_02_7 = _mm256_srai_epi32(out_02_5, DCT_CONST_BITS);
+ const __m256i out_18_6 = _mm256_srai_epi32(out_18_4, DCT_CONST_BITS);
+ const __m256i out_18_7 = _mm256_srai_epi32(out_18_5, DCT_CONST_BITS);
+ const __m256i out_10_6 = _mm256_srai_epi32(out_10_4, DCT_CONST_BITS);
+ const __m256i out_10_7 = _mm256_srai_epi32(out_10_5, DCT_CONST_BITS);
+ const __m256i out_26_6 = _mm256_srai_epi32(out_26_4, DCT_CONST_BITS);
+ const __m256i out_26_7 = _mm256_srai_epi32(out_26_5, DCT_CONST_BITS);
+ const __m256i out_06_6 = _mm256_srai_epi32(out_06_4, DCT_CONST_BITS);
+ const __m256i out_06_7 = _mm256_srai_epi32(out_06_5, DCT_CONST_BITS);
+ const __m256i out_22_6 = _mm256_srai_epi32(out_22_4, DCT_CONST_BITS);
+ const __m256i out_22_7 = _mm256_srai_epi32(out_22_5, DCT_CONST_BITS);
+ const __m256i out_14_6 = _mm256_srai_epi32(out_14_4, DCT_CONST_BITS);
+ const __m256i out_14_7 = _mm256_srai_epi32(out_14_5, DCT_CONST_BITS);
+ const __m256i out_30_6 = _mm256_srai_epi32(out_30_4, DCT_CONST_BITS);
+ const __m256i out_30_7 = _mm256_srai_epi32(out_30_5, DCT_CONST_BITS);
+ // Combine
+ out[ 2] = _mm256_packs_epi32(out_02_6, out_02_7);
+ out[18] = _mm256_packs_epi32(out_18_6, out_18_7);
+ out[10] = _mm256_packs_epi32(out_10_6, out_10_7);
+ out[26] = _mm256_packs_epi32(out_26_6, out_26_7);
+ out[ 6] = _mm256_packs_epi32(out_06_6, out_06_7);
+ out[22] = _mm256_packs_epi32(out_22_6, out_22_7);
+ out[14] = _mm256_packs_epi32(out_14_6, out_14_7);
+ out[30] = _mm256_packs_epi32(out_30_6, out_30_7);
+ }
+ {+ step1[16] = _mm256_add_epi16(step3[17], step2[16]);
+ step1[17] = _mm256_sub_epi16(step2[16], step3[17]);
+ step1[18] = _mm256_sub_epi16(step2[19], step3[18]);
+ step1[19] = _mm256_add_epi16(step3[18], step2[19]);
+ step1[20] = _mm256_add_epi16(step3[21], step2[20]);
+ step1[21] = _mm256_sub_epi16(step2[20], step3[21]);
+ step1[22] = _mm256_sub_epi16(step2[23], step3[22]);
+ step1[23] = _mm256_add_epi16(step3[22], step2[23]);
+ step1[24] = _mm256_add_epi16(step3[25], step2[24]);
+ step1[25] = _mm256_sub_epi16(step2[24], step3[25]);
+ step1[26] = _mm256_sub_epi16(step2[27], step3[26]);
+ step1[27] = _mm256_add_epi16(step3[26], step2[27]);
+ step1[28] = _mm256_add_epi16(step3[29], step2[28]);
+ step1[29] = _mm256_sub_epi16(step2[28], step3[29]);
+ step1[30] = _mm256_sub_epi16(step2[31], step3[30]);
+ step1[31] = _mm256_add_epi16(step3[30], step2[31]);
+ }
+ // Final stage --- outputs indices are bit-reversed.
+ {+ const __m256i out_01_0 = _mm256_unpacklo_epi16(step1[16], step1[31]);
+ const __m256i out_01_1 = _mm256_unpackhi_epi16(step1[16], step1[31]);
+ const __m256i out_17_0 = _mm256_unpacklo_epi16(step1[17], step1[30]);
+ const __m256i out_17_1 = _mm256_unpackhi_epi16(step1[17], step1[30]);
+ const __m256i out_09_0 = _mm256_unpacklo_epi16(step1[18], step1[29]);
+ const __m256i out_09_1 = _mm256_unpackhi_epi16(step1[18], step1[29]);
+ const __m256i out_25_0 = _mm256_unpacklo_epi16(step1[19], step1[28]);
+ const __m256i out_25_1 = _mm256_unpackhi_epi16(step1[19], step1[28]);
+ const __m256i out_01_2 = _mm256_madd_epi16(out_01_0, k__cospi_p31_p01);
+ const __m256i out_01_3 = _mm256_madd_epi16(out_01_1, k__cospi_p31_p01);
+ const __m256i out_17_2 = _mm256_madd_epi16(out_17_0, k__cospi_p15_p17);
+ const __m256i out_17_3 = _mm256_madd_epi16(out_17_1, k__cospi_p15_p17);
+ const __m256i out_09_2 = _mm256_madd_epi16(out_09_0, k__cospi_p23_p09);
+ const __m256i out_09_3 = _mm256_madd_epi16(out_09_1, k__cospi_p23_p09);
+ const __m256i out_25_2 = _mm256_madd_epi16(out_25_0, k__cospi_p07_p25);
+ const __m256i out_25_3 = _mm256_madd_epi16(out_25_1, k__cospi_p07_p25);
+ const __m256i out_07_2 = _mm256_madd_epi16(out_25_0, k__cospi_m25_p07);
+ const __m256i out_07_3 = _mm256_madd_epi16(out_25_1, k__cospi_m25_p07);
+ const __m256i out_23_2 = _mm256_madd_epi16(out_09_0, k__cospi_m09_p23);
+ const __m256i out_23_3 = _mm256_madd_epi16(out_09_1, k__cospi_m09_p23);
+ const __m256i out_15_2 = _mm256_madd_epi16(out_17_0, k__cospi_m17_p15);
+ const __m256i out_15_3 = _mm256_madd_epi16(out_17_1, k__cospi_m17_p15);
+ const __m256i out_31_2 = _mm256_madd_epi16(out_01_0, k__cospi_m01_p31);
+ const __m256i out_31_3 = _mm256_madd_epi16(out_01_1, k__cospi_m01_p31);
+ // dct_const_round_shift
+ const __m256i out_01_4 = _mm256_add_epi32(out_01_2, k__DCT_CONST_ROUNDING);
+ const __m256i out_01_5 = _mm256_add_epi32(out_01_3, k__DCT_CONST_ROUNDING);
+ const __m256i out_17_4 = _mm256_add_epi32(out_17_2, k__DCT_CONST_ROUNDING);
+ const __m256i out_17_5 = _mm256_add_epi32(out_17_3, k__DCT_CONST_ROUNDING);
+ const __m256i out_09_4 = _mm256_add_epi32(out_09_2, k__DCT_CONST_ROUNDING);
+ const __m256i out_09_5 = _mm256_add_epi32(out_09_3, k__DCT_CONST_ROUNDING);
+ const __m256i out_25_4 = _mm256_add_epi32(out_25_2, k__DCT_CONST_ROUNDING);
+ const __m256i out_25_5 = _mm256_add_epi32(out_25_3, k__DCT_CONST_ROUNDING);
+ const __m256i out_07_4 = _mm256_add_epi32(out_07_2, k__DCT_CONST_ROUNDING);
+ const __m256i out_07_5 = _mm256_add_epi32(out_07_3, k__DCT_CONST_ROUNDING);
+ const __m256i out_23_4 = _mm256_add_epi32(out_23_2, k__DCT_CONST_ROUNDING);
+ const __m256i out_23_5 = _mm256_add_epi32(out_23_3, k__DCT_CONST_ROUNDING);
+ const __m256i out_15_4 = _mm256_add_epi32(out_15_2, k__DCT_CONST_ROUNDING);
+ const __m256i out_15_5 = _mm256_add_epi32(out_15_3, k__DCT_CONST_ROUNDING);
+ const __m256i out_31_4 = _mm256_add_epi32(out_31_2, k__DCT_CONST_ROUNDING);
+ const __m256i out_31_5 = _mm256_add_epi32(out_31_3, k__DCT_CONST_ROUNDING);
+ const __m256i out_01_6 = _mm256_srai_epi32(out_01_4, DCT_CONST_BITS);
+ const __m256i out_01_7 = _mm256_srai_epi32(out_01_5, DCT_CONST_BITS);
+ const __m256i out_17_6 = _mm256_srai_epi32(out_17_4, DCT_CONST_BITS);
+ const __m256i out_17_7 = _mm256_srai_epi32(out_17_5, DCT_CONST_BITS);
+ const __m256i out_09_6 = _mm256_srai_epi32(out_09_4, DCT_CONST_BITS);
+ const __m256i out_09_7 = _mm256_srai_epi32(out_09_5, DCT_CONST_BITS);
+ const __m256i out_25_6 = _mm256_srai_epi32(out_25_4, DCT_CONST_BITS);
+ const __m256i out_25_7 = _mm256_srai_epi32(out_25_5, DCT_CONST_BITS);
+ const __m256i out_07_6 = _mm256_srai_epi32(out_07_4, DCT_CONST_BITS);
+ const __m256i out_07_7 = _mm256_srai_epi32(out_07_5, DCT_CONST_BITS);
+ const __m256i out_23_6 = _mm256_srai_epi32(out_23_4, DCT_CONST_BITS);
+ const __m256i out_23_7 = _mm256_srai_epi32(out_23_5, DCT_CONST_BITS);
+ const __m256i out_15_6 = _mm256_srai_epi32(out_15_4, DCT_CONST_BITS);
+ const __m256i out_15_7 = _mm256_srai_epi32(out_15_5, DCT_CONST_BITS);
+ const __m256i out_31_6 = _mm256_srai_epi32(out_31_4, DCT_CONST_BITS);
+ const __m256i out_31_7 = _mm256_srai_epi32(out_31_5, DCT_CONST_BITS);
+ // Combine
+ out[ 1] = _mm256_packs_epi32(out_01_6, out_01_7);
+ out[17] = _mm256_packs_epi32(out_17_6, out_17_7);
+ out[ 9] = _mm256_packs_epi32(out_09_6, out_09_7);
+ out[25] = _mm256_packs_epi32(out_25_6, out_25_7);
+ out[ 7] = _mm256_packs_epi32(out_07_6, out_07_7);
+ out[23] = _mm256_packs_epi32(out_23_6, out_23_7);
+ out[15] = _mm256_packs_epi32(out_15_6, out_15_7);
+ out[31] = _mm256_packs_epi32(out_31_6, out_31_7);
+ }
+ {+ const __m256i out_05_0 = _mm256_unpacklo_epi16(step1[20], step1[27]);
+ const __m256i out_05_1 = _mm256_unpackhi_epi16(step1[20], step1[27]);
+ const __m256i out_21_0 = _mm256_unpacklo_epi16(step1[21], step1[26]);
+ const __m256i out_21_1 = _mm256_unpackhi_epi16(step1[21], step1[26]);
+ const __m256i out_13_0 = _mm256_unpacklo_epi16(step1[22], step1[25]);
+ const __m256i out_13_1 = _mm256_unpackhi_epi16(step1[22], step1[25]);
+ const __m256i out_29_0 = _mm256_unpacklo_epi16(step1[23], step1[24]);
+ const __m256i out_29_1 = _mm256_unpackhi_epi16(step1[23], step1[24]);
+ const __m256i out_05_2 = _mm256_madd_epi16(out_05_0, k__cospi_p27_p05);
+ const __m256i out_05_3 = _mm256_madd_epi16(out_05_1, k__cospi_p27_p05);
+ const __m256i out_21_2 = _mm256_madd_epi16(out_21_0, k__cospi_p11_p21);
+ const __m256i out_21_3 = _mm256_madd_epi16(out_21_1, k__cospi_p11_p21);
+ const __m256i out_13_2 = _mm256_madd_epi16(out_13_0, k__cospi_p19_p13);
+ const __m256i out_13_3 = _mm256_madd_epi16(out_13_1, k__cospi_p19_p13);
+ const __m256i out_29_2 = _mm256_madd_epi16(out_29_0, k__cospi_p03_p29);
+ const __m256i out_29_3 = _mm256_madd_epi16(out_29_1, k__cospi_p03_p29);
+ const __m256i out_03_2 = _mm256_madd_epi16(out_29_0, k__cospi_m29_p03);
+ const __m256i out_03_3 = _mm256_madd_epi16(out_29_1, k__cospi_m29_p03);
+ const __m256i out_19_2 = _mm256_madd_epi16(out_13_0, k__cospi_m13_p19);
+ const __m256i out_19_3 = _mm256_madd_epi16(out_13_1, k__cospi_m13_p19);
+ const __m256i out_11_2 = _mm256_madd_epi16(out_21_0, k__cospi_m21_p11);
+ const __m256i out_11_3 = _mm256_madd_epi16(out_21_1, k__cospi_m21_p11);
+ const __m256i out_27_2 = _mm256_madd_epi16(out_05_0, k__cospi_m05_p27);
+ const __m256i out_27_3 = _mm256_madd_epi16(out_05_1, k__cospi_m05_p27);
+ // dct_const_round_shift
+ const __m256i out_05_4 = _mm256_add_epi32(out_05_2, k__DCT_CONST_ROUNDING);
+ const __m256i out_05_5 = _mm256_add_epi32(out_05_3, k__DCT_CONST_ROUNDING);
+ const __m256i out_21_4 = _mm256_add_epi32(out_21_2, k__DCT_CONST_ROUNDING);
+ const __m256i out_21_5 = _mm256_add_epi32(out_21_3, k__DCT_CONST_ROUNDING);
+ const __m256i out_13_4 = _mm256_add_epi32(out_13_2, k__DCT_CONST_ROUNDING);
+ const __m256i out_13_5 = _mm256_add_epi32(out_13_3, k__DCT_CONST_ROUNDING);
+ const __m256i out_29_4 = _mm256_add_epi32(out_29_2, k__DCT_CONST_ROUNDING);
+ const __m256i out_29_5 = _mm256_add_epi32(out_29_3, k__DCT_CONST_ROUNDING);
+ const __m256i out_03_4 = _mm256_add_epi32(out_03_2, k__DCT_CONST_ROUNDING);
+ const __m256i out_03_5 = _mm256_add_epi32(out_03_3, k__DCT_CONST_ROUNDING);
+ const __m256i out_19_4 = _mm256_add_epi32(out_19_2, k__DCT_CONST_ROUNDING);
+ const __m256i out_19_5 = _mm256_add_epi32(out_19_3, k__DCT_CONST_ROUNDING);
+ const __m256i out_11_4 = _mm256_add_epi32(out_11_2, k__DCT_CONST_ROUNDING);
+ const __m256i out_11_5 = _mm256_add_epi32(out_11_3, k__DCT_CONST_ROUNDING);
+ const __m256i out_27_4 = _mm256_add_epi32(out_27_2, k__DCT_CONST_ROUNDING);
+ const __m256i out_27_5 = _mm256_add_epi32(out_27_3, k__DCT_CONST_ROUNDING);
+ const __m256i out_05_6 = _mm256_srai_epi32(out_05_4, DCT_CONST_BITS);
+ const __m256i out_05_7 = _mm256_srai_epi32(out_05_5, DCT_CONST_BITS);
+ const __m256i out_21_6 = _mm256_srai_epi32(out_21_4, DCT_CONST_BITS);
+ const __m256i out_21_7 = _mm256_srai_epi32(out_21_5, DCT_CONST_BITS);
+ const __m256i out_13_6 = _mm256_srai_epi32(out_13_4, DCT_CONST_BITS);
+ const __m256i out_13_7 = _mm256_srai_epi32(out_13_5, DCT_CONST_BITS);
+ const __m256i out_29_6 = _mm256_srai_epi32(out_29_4, DCT_CONST_BITS);
+ const __m256i out_29_7 = _mm256_srai_epi32(out_29_5, DCT_CONST_BITS);
+ const __m256i out_03_6 = _mm256_srai_epi32(out_03_4, DCT_CONST_BITS);
+ const __m256i out_03_7 = _mm256_srai_epi32(out_03_5, DCT_CONST_BITS);
+ const __m256i out_19_6 = _mm256_srai_epi32(out_19_4, DCT_CONST_BITS);
+ const __m256i out_19_7 = _mm256_srai_epi32(out_19_5, DCT_CONST_BITS);
+ const __m256i out_11_6 = _mm256_srai_epi32(out_11_4, DCT_CONST_BITS);
+ const __m256i out_11_7 = _mm256_srai_epi32(out_11_5, DCT_CONST_BITS);
+ const __m256i out_27_6 = _mm256_srai_epi32(out_27_4, DCT_CONST_BITS);
+ const __m256i out_27_7 = _mm256_srai_epi32(out_27_5, DCT_CONST_BITS);
+ // Combine
+ out[ 5] = _mm256_packs_epi32(out_05_6, out_05_7);
+ out[21] = _mm256_packs_epi32(out_21_6, out_21_7);
+ out[13] = _mm256_packs_epi32(out_13_6, out_13_7);
+ out[29] = _mm256_packs_epi32(out_29_6, out_29_7);
+ out[ 3] = _mm256_packs_epi32(out_03_6, out_03_7);
+ out[19] = _mm256_packs_epi32(out_19_6, out_19_7);
+ out[11] = _mm256_packs_epi32(out_11_6, out_11_7);
+ out[27] = _mm256_packs_epi32(out_27_6, out_27_7);
+ }
+#if FDCT32x32_HIGH_PRECISION
+ } else {+ __m256i lstep1[64], lstep2[64], lstep3[64];
+ __m256i u[32], v[32], sign[16];
+ const __m256i K32One = _mm256_set_epi32(1, 1, 1, 1, 1, 1, 1, 1);
+ // start using 32-bit operations
+ // stage 3
+ {+ // expanding to 32-bit length priori to addition operations
+ lstep2[ 0] = _mm256_unpacklo_epi16(step2[ 0], kZero);
+ lstep2[ 1] = _mm256_unpackhi_epi16(step2[ 0], kZero);
+ lstep2[ 2] = _mm256_unpacklo_epi16(step2[ 1], kZero);
+ lstep2[ 3] = _mm256_unpackhi_epi16(step2[ 1], kZero);
+ lstep2[ 4] = _mm256_unpacklo_epi16(step2[ 2], kZero);
+ lstep2[ 5] = _mm256_unpackhi_epi16(step2[ 2], kZero);
+ lstep2[ 6] = _mm256_unpacklo_epi16(step2[ 3], kZero);
+ lstep2[ 7] = _mm256_unpackhi_epi16(step2[ 3], kZero);
+ lstep2[ 8] = _mm256_unpacklo_epi16(step2[ 4], kZero);
+ lstep2[ 9] = _mm256_unpackhi_epi16(step2[ 4], kZero);
+ lstep2[10] = _mm256_unpacklo_epi16(step2[ 5], kZero);
+ lstep2[11] = _mm256_unpackhi_epi16(step2[ 5], kZero);
+ lstep2[12] = _mm256_unpacklo_epi16(step2[ 6], kZero);
+ lstep2[13] = _mm256_unpackhi_epi16(step2[ 6], kZero);
+ lstep2[14] = _mm256_unpacklo_epi16(step2[ 7], kZero);
+ lstep2[15] = _mm256_unpackhi_epi16(step2[ 7], kZero);
+ lstep2[ 0] = _mm256_madd_epi16(lstep2[ 0], kOne);
+ lstep2[ 1] = _mm256_madd_epi16(lstep2[ 1], kOne);
+ lstep2[ 2] = _mm256_madd_epi16(lstep2[ 2], kOne);
+ lstep2[ 3] = _mm256_madd_epi16(lstep2[ 3], kOne);
+ lstep2[ 4] = _mm256_madd_epi16(lstep2[ 4], kOne);
+ lstep2[ 5] = _mm256_madd_epi16(lstep2[ 5], kOne);
+ lstep2[ 6] = _mm256_madd_epi16(lstep2[ 6], kOne);
+ lstep2[ 7] = _mm256_madd_epi16(lstep2[ 7], kOne);
+ lstep2[ 8] = _mm256_madd_epi16(lstep2[ 8], kOne);
+ lstep2[ 9] = _mm256_madd_epi16(lstep2[ 9], kOne);
+ lstep2[10] = _mm256_madd_epi16(lstep2[10], kOne);
+ lstep2[11] = _mm256_madd_epi16(lstep2[11], kOne);
+ lstep2[12] = _mm256_madd_epi16(lstep2[12], kOne);
+ lstep2[13] = _mm256_madd_epi16(lstep2[13], kOne);
+ lstep2[14] = _mm256_madd_epi16(lstep2[14], kOne);
+ lstep2[15] = _mm256_madd_epi16(lstep2[15], kOne);
+
+ lstep3[ 0] = _mm256_add_epi32(lstep2[14], lstep2[ 0]);
+ lstep3[ 1] = _mm256_add_epi32(lstep2[15], lstep2[ 1]);
+ lstep3[ 2] = _mm256_add_epi32(lstep2[12], lstep2[ 2]);
+ lstep3[ 3] = _mm256_add_epi32(lstep2[13], lstep2[ 3]);
+ lstep3[ 4] = _mm256_add_epi32(lstep2[10], lstep2[ 4]);
+ lstep3[ 5] = _mm256_add_epi32(lstep2[11], lstep2[ 5]);
+ lstep3[ 6] = _mm256_add_epi32(lstep2[ 8], lstep2[ 6]);
+ lstep3[ 7] = _mm256_add_epi32(lstep2[ 9], lstep2[ 7]);
+ lstep3[ 8] = _mm256_sub_epi32(lstep2[ 6], lstep2[ 8]);
+ lstep3[ 9] = _mm256_sub_epi32(lstep2[ 7], lstep2[ 9]);
+ lstep3[10] = _mm256_sub_epi32(lstep2[ 4], lstep2[10]);
+ lstep3[11] = _mm256_sub_epi32(lstep2[ 5], lstep2[11]);
+ lstep3[12] = _mm256_sub_epi32(lstep2[ 2], lstep2[12]);
+ lstep3[13] = _mm256_sub_epi32(lstep2[ 3], lstep2[13]);
+ lstep3[14] = _mm256_sub_epi32(lstep2[ 0], lstep2[14]);
+ lstep3[15] = _mm256_sub_epi32(lstep2[ 1], lstep2[15]);
+ }
+ {+ const __m256i s3_10_0 = _mm256_unpacklo_epi16(step2[13], step2[10]);
+ const __m256i s3_10_1 = _mm256_unpackhi_epi16(step2[13], step2[10]);
+ const __m256i s3_11_0 = _mm256_unpacklo_epi16(step2[12], step2[11]);
+ const __m256i s3_11_1 = _mm256_unpackhi_epi16(step2[12], step2[11]);
+ const __m256i s3_10_2 = _mm256_madd_epi16(s3_10_0, k__cospi_p16_m16);
+ const __m256i s3_10_3 = _mm256_madd_epi16(s3_10_1, k__cospi_p16_m16);
+ const __m256i s3_11_2 = _mm256_madd_epi16(s3_11_0, k__cospi_p16_m16);
+ const __m256i s3_11_3 = _mm256_madd_epi16(s3_11_1, k__cospi_p16_m16);
+ const __m256i s3_12_2 = _mm256_madd_epi16(s3_11_0, k__cospi_p16_p16);
+ const __m256i s3_12_3 = _mm256_madd_epi16(s3_11_1, k__cospi_p16_p16);
+ const __m256i s3_13_2 = _mm256_madd_epi16(s3_10_0, k__cospi_p16_p16);
+ const __m256i s3_13_3 = _mm256_madd_epi16(s3_10_1, k__cospi_p16_p16);
+ // dct_const_round_shift
+ const __m256i s3_10_4 = _mm256_add_epi32(s3_10_2, k__DCT_CONST_ROUNDING);
+ const __m256i s3_10_5 = _mm256_add_epi32(s3_10_3, k__DCT_CONST_ROUNDING);
+ const __m256i s3_11_4 = _mm256_add_epi32(s3_11_2, k__DCT_CONST_ROUNDING);
+ const __m256i s3_11_5 = _mm256_add_epi32(s3_11_3, k__DCT_CONST_ROUNDING);
+ const __m256i s3_12_4 = _mm256_add_epi32(s3_12_2, k__DCT_CONST_ROUNDING);
+ const __m256i s3_12_5 = _mm256_add_epi32(s3_12_3, k__DCT_CONST_ROUNDING);
+ const __m256i s3_13_4 = _mm256_add_epi32(s3_13_2, k__DCT_CONST_ROUNDING);
+ const __m256i s3_13_5 = _mm256_add_epi32(s3_13_3, k__DCT_CONST_ROUNDING);
+ lstep3[20] = _mm256_srai_epi32(s3_10_4, DCT_CONST_BITS);
+ lstep3[21] = _mm256_srai_epi32(s3_10_5, DCT_CONST_BITS);
+ lstep3[22] = _mm256_srai_epi32(s3_11_4, DCT_CONST_BITS);
+ lstep3[23] = _mm256_srai_epi32(s3_11_5, DCT_CONST_BITS);
+ lstep3[24] = _mm256_srai_epi32(s3_12_4, DCT_CONST_BITS);
+ lstep3[25] = _mm256_srai_epi32(s3_12_5, DCT_CONST_BITS);
+ lstep3[26] = _mm256_srai_epi32(s3_13_4, DCT_CONST_BITS);
+ lstep3[27] = _mm256_srai_epi32(s3_13_5, DCT_CONST_BITS);
+ }
+ {+ lstep2[40] = _mm256_unpacklo_epi16(step2[20], kZero);
+ lstep2[41] = _mm256_unpackhi_epi16(step2[20], kZero);
+ lstep2[42] = _mm256_unpacklo_epi16(step2[21], kZero);
+ lstep2[43] = _mm256_unpackhi_epi16(step2[21], kZero);
+ lstep2[44] = _mm256_unpacklo_epi16(step2[22], kZero);
+ lstep2[45] = _mm256_unpackhi_epi16(step2[22], kZero);
+ lstep2[46] = _mm256_unpacklo_epi16(step2[23], kZero);
+ lstep2[47] = _mm256_unpackhi_epi16(step2[23], kZero);
+ lstep2[48] = _mm256_unpacklo_epi16(step2[24], kZero);
+ lstep2[49] = _mm256_unpackhi_epi16(step2[24], kZero);
+ lstep2[50] = _mm256_unpacklo_epi16(step2[25], kZero);
+ lstep2[51] = _mm256_unpackhi_epi16(step2[25], kZero);
+ lstep2[52] = _mm256_unpacklo_epi16(step2[26], kZero);
+ lstep2[53] = _mm256_unpackhi_epi16(step2[26], kZero);
+ lstep2[54] = _mm256_unpacklo_epi16(step2[27], kZero);
+ lstep2[55] = _mm256_unpackhi_epi16(step2[27], kZero);
+ lstep2[40] = _mm256_madd_epi16(lstep2[40], kOne);
+ lstep2[41] = _mm256_madd_epi16(lstep2[41], kOne);
+ lstep2[42] = _mm256_madd_epi16(lstep2[42], kOne);
+ lstep2[43] = _mm256_madd_epi16(lstep2[43], kOne);
+ lstep2[44] = _mm256_madd_epi16(lstep2[44], kOne);
+ lstep2[45] = _mm256_madd_epi16(lstep2[45], kOne);
+ lstep2[46] = _mm256_madd_epi16(lstep2[46], kOne);
+ lstep2[47] = _mm256_madd_epi16(lstep2[47], kOne);
+ lstep2[48] = _mm256_madd_epi16(lstep2[48], kOne);
+ lstep2[49] = _mm256_madd_epi16(lstep2[49], kOne);
+ lstep2[50] = _mm256_madd_epi16(lstep2[50], kOne);
+ lstep2[51] = _mm256_madd_epi16(lstep2[51], kOne);
+ lstep2[52] = _mm256_madd_epi16(lstep2[52], kOne);
+ lstep2[53] = _mm256_madd_epi16(lstep2[53], kOne);
+ lstep2[54] = _mm256_madd_epi16(lstep2[54], kOne);
+ lstep2[55] = _mm256_madd_epi16(lstep2[55], kOne);
+
+ lstep1[32] = _mm256_unpacklo_epi16(step1[16], kZero);
+ lstep1[33] = _mm256_unpackhi_epi16(step1[16], kZero);
+ lstep1[34] = _mm256_unpacklo_epi16(step1[17], kZero);
+ lstep1[35] = _mm256_unpackhi_epi16(step1[17], kZero);
+ lstep1[36] = _mm256_unpacklo_epi16(step1[18], kZero);
+ lstep1[37] = _mm256_unpackhi_epi16(step1[18], kZero);
+ lstep1[38] = _mm256_unpacklo_epi16(step1[19], kZero);
+ lstep1[39] = _mm256_unpackhi_epi16(step1[19], kZero);
+ lstep1[56] = _mm256_unpacklo_epi16(step1[28], kZero);
+ lstep1[57] = _mm256_unpackhi_epi16(step1[28], kZero);
+ lstep1[58] = _mm256_unpacklo_epi16(step1[29], kZero);
+ lstep1[59] = _mm256_unpackhi_epi16(step1[29], kZero);
+ lstep1[60] = _mm256_unpacklo_epi16(step1[30], kZero);
+ lstep1[61] = _mm256_unpackhi_epi16(step1[30], kZero);
+ lstep1[62] = _mm256_unpacklo_epi16(step1[31], kZero);
+ lstep1[63] = _mm256_unpackhi_epi16(step1[31], kZero);
+ lstep1[32] = _mm256_madd_epi16(lstep1[32], kOne);
+ lstep1[33] = _mm256_madd_epi16(lstep1[33], kOne);
+ lstep1[34] = _mm256_madd_epi16(lstep1[34], kOne);
+ lstep1[35] = _mm256_madd_epi16(lstep1[35], kOne);
+ lstep1[36] = _mm256_madd_epi16(lstep1[36], kOne);
+ lstep1[37] = _mm256_madd_epi16(lstep1[37], kOne);
+ lstep1[38] = _mm256_madd_epi16(lstep1[38], kOne);
+ lstep1[39] = _mm256_madd_epi16(lstep1[39], kOne);
+ lstep1[56] = _mm256_madd_epi16(lstep1[56], kOne);
+ lstep1[57] = _mm256_madd_epi16(lstep1[57], kOne);
+ lstep1[58] = _mm256_madd_epi16(lstep1[58], kOne);
+ lstep1[59] = _mm256_madd_epi16(lstep1[59], kOne);
+ lstep1[60] = _mm256_madd_epi16(lstep1[60], kOne);
+ lstep1[61] = _mm256_madd_epi16(lstep1[61], kOne);
+ lstep1[62] = _mm256_madd_epi16(lstep1[62], kOne);
+ lstep1[63] = _mm256_madd_epi16(lstep1[63], kOne);
+
+ lstep3[32] = _mm256_add_epi32(lstep2[46], lstep1[32]);
+ lstep3[33] = _mm256_add_epi32(lstep2[47], lstep1[33]);
+
+ lstep3[34] = _mm256_add_epi32(lstep2[44], lstep1[34]);
+ lstep3[35] = _mm256_add_epi32(lstep2[45], lstep1[35]);
+ lstep3[36] = _mm256_add_epi32(lstep2[42], lstep1[36]);
+ lstep3[37] = _mm256_add_epi32(lstep2[43], lstep1[37]);
+ lstep3[38] = _mm256_add_epi32(lstep2[40], lstep1[38]);
+ lstep3[39] = _mm256_add_epi32(lstep2[41], lstep1[39]);
+ lstep3[40] = _mm256_sub_epi32(lstep1[38], lstep2[40]);
+ lstep3[41] = _mm256_sub_epi32(lstep1[39], lstep2[41]);
+ lstep3[42] = _mm256_sub_epi32(lstep1[36], lstep2[42]);
+ lstep3[43] = _mm256_sub_epi32(lstep1[37], lstep2[43]);
+ lstep3[44] = _mm256_sub_epi32(lstep1[34], lstep2[44]);
+ lstep3[45] = _mm256_sub_epi32(lstep1[35], lstep2[45]);
+ lstep3[46] = _mm256_sub_epi32(lstep1[32], lstep2[46]);
+ lstep3[47] = _mm256_sub_epi32(lstep1[33], lstep2[47]);
+ lstep3[48] = _mm256_sub_epi32(lstep1[62], lstep2[48]);
+ lstep3[49] = _mm256_sub_epi32(lstep1[63], lstep2[49]);
+ lstep3[50] = _mm256_sub_epi32(lstep1[60], lstep2[50]);
+ lstep3[51] = _mm256_sub_epi32(lstep1[61], lstep2[51]);
+ lstep3[52] = _mm256_sub_epi32(lstep1[58], lstep2[52]);
+ lstep3[53] = _mm256_sub_epi32(lstep1[59], lstep2[53]);
+ lstep3[54] = _mm256_sub_epi32(lstep1[56], lstep2[54]);
+ lstep3[55] = _mm256_sub_epi32(lstep1[57], lstep2[55]);
+ lstep3[56] = _mm256_add_epi32(lstep2[54], lstep1[56]);
+ lstep3[57] = _mm256_add_epi32(lstep2[55], lstep1[57]);
+ lstep3[58] = _mm256_add_epi32(lstep2[52], lstep1[58]);
+ lstep3[59] = _mm256_add_epi32(lstep2[53], lstep1[59]);
+ lstep3[60] = _mm256_add_epi32(lstep2[50], lstep1[60]);
+ lstep3[61] = _mm256_add_epi32(lstep2[51], lstep1[61]);
+ lstep3[62] = _mm256_add_epi32(lstep2[48], lstep1[62]);
+ lstep3[63] = _mm256_add_epi32(lstep2[49], lstep1[63]);
+ }
+
+ // stage 4
+ {+ // expanding to 32-bit length priori to addition operations
+ lstep2[16] = _mm256_unpacklo_epi16(step2[ 8], kZero);
+ lstep2[17] = _mm256_unpackhi_epi16(step2[ 8], kZero);
+ lstep2[18] = _mm256_unpacklo_epi16(step2[ 9], kZero);
+ lstep2[19] = _mm256_unpackhi_epi16(step2[ 9], kZero);
+ lstep2[28] = _mm256_unpacklo_epi16(step2[14], kZero);
+ lstep2[29] = _mm256_unpackhi_epi16(step2[14], kZero);
+ lstep2[30] = _mm256_unpacklo_epi16(step2[15], kZero);
+ lstep2[31] = _mm256_unpackhi_epi16(step2[15], kZero);
+ lstep2[16] = _mm256_madd_epi16(lstep2[16], kOne);
+ lstep2[17] = _mm256_madd_epi16(lstep2[17], kOne);
+ lstep2[18] = _mm256_madd_epi16(lstep2[18], kOne);
+ lstep2[19] = _mm256_madd_epi16(lstep2[19], kOne);
+ lstep2[28] = _mm256_madd_epi16(lstep2[28], kOne);
+ lstep2[29] = _mm256_madd_epi16(lstep2[29], kOne);
+ lstep2[30] = _mm256_madd_epi16(lstep2[30], kOne);
+ lstep2[31] = _mm256_madd_epi16(lstep2[31], kOne);
+
+ lstep1[ 0] = _mm256_add_epi32(lstep3[ 6], lstep3[ 0]);
+ lstep1[ 1] = _mm256_add_epi32(lstep3[ 7], lstep3[ 1]);
+ lstep1[ 2] = _mm256_add_epi32(lstep3[ 4], lstep3[ 2]);
+ lstep1[ 3] = _mm256_add_epi32(lstep3[ 5], lstep3[ 3]);
+ lstep1[ 4] = _mm256_sub_epi32(lstep3[ 2], lstep3[ 4]);
+ lstep1[ 5] = _mm256_sub_epi32(lstep3[ 3], lstep3[ 5]);
+ lstep1[ 6] = _mm256_sub_epi32(lstep3[ 0], lstep3[ 6]);
+ lstep1[ 7] = _mm256_sub_epi32(lstep3[ 1], lstep3[ 7]);
+ lstep1[16] = _mm256_add_epi32(lstep3[22], lstep2[16]);
+ lstep1[17] = _mm256_add_epi32(lstep3[23], lstep2[17]);
+ lstep1[18] = _mm256_add_epi32(lstep3[20], lstep2[18]);
+ lstep1[19] = _mm256_add_epi32(lstep3[21], lstep2[19]);
+ lstep1[20] = _mm256_sub_epi32(lstep2[18], lstep3[20]);
+ lstep1[21] = _mm256_sub_epi32(lstep2[19], lstep3[21]);
+ lstep1[22] = _mm256_sub_epi32(lstep2[16], lstep3[22]);
+ lstep1[23] = _mm256_sub_epi32(lstep2[17], lstep3[23]);
+ lstep1[24] = _mm256_sub_epi32(lstep2[30], lstep3[24]);
+ lstep1[25] = _mm256_sub_epi32(lstep2[31], lstep3[25]);
+ lstep1[26] = _mm256_sub_epi32(lstep2[28], lstep3[26]);
+ lstep1[27] = _mm256_sub_epi32(lstep2[29], lstep3[27]);
+ lstep1[28] = _mm256_add_epi32(lstep3[26], lstep2[28]);
+ lstep1[29] = _mm256_add_epi32(lstep3[27], lstep2[29]);
+ lstep1[30] = _mm256_add_epi32(lstep3[24], lstep2[30]);
+ lstep1[31] = _mm256_add_epi32(lstep3[25], lstep2[31]);
+ }
+ {+ // to be continued...
+ //
+ const __m256i k32_p16_p16 = pair256_set_epi32(cospi_16_64, cospi_16_64);
+ const __m256i k32_p16_m16 = pair256_set_epi32(cospi_16_64, -cospi_16_64);
+
+ u[0] = _mm256_unpacklo_epi32(lstep3[12], lstep3[10]);
+ u[1] = _mm256_unpackhi_epi32(lstep3[12], lstep3[10]);
+ u[2] = _mm256_unpacklo_epi32(lstep3[13], lstep3[11]);
+ u[3] = _mm256_unpackhi_epi32(lstep3[13], lstep3[11]);
+
+ // TODO(jingning): manually inline k_madd_epi32_avx2_ to further hide
+ // instruction latency.
+ v[ 0] = k_madd_epi32_avx2(u[0], k32_p16_m16);
+ v[ 1] = k_madd_epi32_avx2(u[1], k32_p16_m16);
+ v[ 2] = k_madd_epi32_avx2(u[2], k32_p16_m16);
+ v[ 3] = k_madd_epi32_avx2(u[3], k32_p16_m16);
+ v[ 4] = k_madd_epi32_avx2(u[0], k32_p16_p16);
+ v[ 5] = k_madd_epi32_avx2(u[1], k32_p16_p16);
+ v[ 6] = k_madd_epi32_avx2(u[2], k32_p16_p16);
+ v[ 7] = k_madd_epi32_avx2(u[3], k32_p16_p16);
+
+ u[0] = k_packs_epi64_avx2(v[0], v[1]);
+ u[1] = k_packs_epi64_avx2(v[2], v[3]);
+ u[2] = k_packs_epi64_avx2(v[4], v[5]);
+ u[3] = k_packs_epi64_avx2(v[6], v[7]);
+
+ v[0] = _mm256_add_epi32(u[0], k__DCT_CONST_ROUNDING);
+ v[1] = _mm256_add_epi32(u[1], k__DCT_CONST_ROUNDING);
+ v[2] = _mm256_add_epi32(u[2], k__DCT_CONST_ROUNDING);
+ v[3] = _mm256_add_epi32(u[3], k__DCT_CONST_ROUNDING);
+
+ lstep1[10] = _mm256_srai_epi32(v[0], DCT_CONST_BITS);
+ lstep1[11] = _mm256_srai_epi32(v[1], DCT_CONST_BITS);
+ lstep1[12] = _mm256_srai_epi32(v[2], DCT_CONST_BITS);
+ lstep1[13] = _mm256_srai_epi32(v[3], DCT_CONST_BITS);
+ }
+ {+ const __m256i k32_m08_p24 = pair256_set_epi32(-cospi_8_64, cospi_24_64);
+ const __m256i k32_m24_m08 = pair256_set_epi32(-cospi_24_64, -cospi_8_64);
+ const __m256i k32_p24_p08 = pair256_set_epi32(cospi_24_64, cospi_8_64);
+
+ u[ 0] = _mm256_unpacklo_epi32(lstep3[36], lstep3[58]);
+ u[ 1] = _mm256_unpackhi_epi32(lstep3[36], lstep3[58]);
+ u[ 2] = _mm256_unpacklo_epi32(lstep3[37], lstep3[59]);
+ u[ 3] = _mm256_unpackhi_epi32(lstep3[37], lstep3[59]);
+ u[ 4] = _mm256_unpacklo_epi32(lstep3[38], lstep3[56]);
+ u[ 5] = _mm256_unpackhi_epi32(lstep3[38], lstep3[56]);
+ u[ 6] = _mm256_unpacklo_epi32(lstep3[39], lstep3[57]);
+ u[ 7] = _mm256_unpackhi_epi32(lstep3[39], lstep3[57]);
+ u[ 8] = _mm256_unpacklo_epi32(lstep3[40], lstep3[54]);
+ u[ 9] = _mm256_unpackhi_epi32(lstep3[40], lstep3[54]);
+ u[10] = _mm256_unpacklo_epi32(lstep3[41], lstep3[55]);
+ u[11] = _mm256_unpackhi_epi32(lstep3[41], lstep3[55]);
+ u[12] = _mm256_unpacklo_epi32(lstep3[42], lstep3[52]);
+ u[13] = _mm256_unpackhi_epi32(lstep3[42], lstep3[52]);
+ u[14] = _mm256_unpacklo_epi32(lstep3[43], lstep3[53]);
+ u[15] = _mm256_unpackhi_epi32(lstep3[43], lstep3[53]);
+
+ v[ 0] = k_madd_epi32_avx2(u[ 0], k32_m08_p24);
+ v[ 1] = k_madd_epi32_avx2(u[ 1], k32_m08_p24);
+ v[ 2] = k_madd_epi32_avx2(u[ 2], k32_m08_p24);
+ v[ 3] = k_madd_epi32_avx2(u[ 3], k32_m08_p24);
+ v[ 4] = k_madd_epi32_avx2(u[ 4], k32_m08_p24);
+ v[ 5] = k_madd_epi32_avx2(u[ 5], k32_m08_p24);
+ v[ 6] = k_madd_epi32_avx2(u[ 6], k32_m08_p24);
+ v[ 7] = k_madd_epi32_avx2(u[ 7], k32_m08_p24);
+ v[ 8] = k_madd_epi32_avx2(u[ 8], k32_m24_m08);
+ v[ 9] = k_madd_epi32_avx2(u[ 9], k32_m24_m08);
+ v[10] = k_madd_epi32_avx2(u[10], k32_m24_m08);
+ v[11] = k_madd_epi32_avx2(u[11], k32_m24_m08);
+ v[12] = k_madd_epi32_avx2(u[12], k32_m24_m08);
+ v[13] = k_madd_epi32_avx2(u[13], k32_m24_m08);
+ v[14] = k_madd_epi32_avx2(u[14], k32_m24_m08);
+ v[15] = k_madd_epi32_avx2(u[15], k32_m24_m08);
+ v[16] = k_madd_epi32_avx2(u[12], k32_m08_p24);
+ v[17] = k_madd_epi32_avx2(u[13], k32_m08_p24);
+ v[18] = k_madd_epi32_avx2(u[14], k32_m08_p24);
+ v[19] = k_madd_epi32_avx2(u[15], k32_m08_p24);
+ v[20] = k_madd_epi32_avx2(u[ 8], k32_m08_p24);
+ v[21] = k_madd_epi32_avx2(u[ 9], k32_m08_p24);
+ v[22] = k_madd_epi32_avx2(u[10], k32_m08_p24);
+ v[23] = k_madd_epi32_avx2(u[11], k32_m08_p24);
+ v[24] = k_madd_epi32_avx2(u[ 4], k32_p24_p08);
+ v[25] = k_madd_epi32_avx2(u[ 5], k32_p24_p08);
+ v[26] = k_madd_epi32_avx2(u[ 6], k32_p24_p08);
+ v[27] = k_madd_epi32_avx2(u[ 7], k32_p24_p08);
+ v[28] = k_madd_epi32_avx2(u[ 0], k32_p24_p08);
+ v[29] = k_madd_epi32_avx2(u[ 1], k32_p24_p08);
+ v[30] = k_madd_epi32_avx2(u[ 2], k32_p24_p08);
+ v[31] = k_madd_epi32_avx2(u[ 3], k32_p24_p08);
+
+ u[ 0] = k_packs_epi64_avx2(v[ 0], v[ 1]);
+ u[ 1] = k_packs_epi64_avx2(v[ 2], v[ 3]);
+ u[ 2] = k_packs_epi64_avx2(v[ 4], v[ 5]);
+ u[ 3] = k_packs_epi64_avx2(v[ 6], v[ 7]);
+ u[ 4] = k_packs_epi64_avx2(v[ 8], v[ 9]);
+ u[ 5] = k_packs_epi64_avx2(v[10], v[11]);
+ u[ 6] = k_packs_epi64_avx2(v[12], v[13]);
+ u[ 7] = k_packs_epi64_avx2(v[14], v[15]);
+ u[ 8] = k_packs_epi64_avx2(v[16], v[17]);
+ u[ 9] = k_packs_epi64_avx2(v[18], v[19]);
+ u[10] = k_packs_epi64_avx2(v[20], v[21]);
+ u[11] = k_packs_epi64_avx2(v[22], v[23]);
+ u[12] = k_packs_epi64_avx2(v[24], v[25]);
+ u[13] = k_packs_epi64_avx2(v[26], v[27]);
+ u[14] = k_packs_epi64_avx2(v[28], v[29]);
+ u[15] = k_packs_epi64_avx2(v[30], v[31]);
+
+ v[ 0] = _mm256_add_epi32(u[ 0], k__DCT_CONST_ROUNDING);
+ v[ 1] = _mm256_add_epi32(u[ 1], k__DCT_CONST_ROUNDING);
+ v[ 2] = _mm256_add_epi32(u[ 2], k__DCT_CONST_ROUNDING);
+ v[ 3] = _mm256_add_epi32(u[ 3], k__DCT_CONST_ROUNDING);
+ v[ 4] = _mm256_add_epi32(u[ 4], k__DCT_CONST_ROUNDING);
+ v[ 5] = _mm256_add_epi32(u[ 5], k__DCT_CONST_ROUNDING);
+ v[ 6] = _mm256_add_epi32(u[ 6], k__DCT_CONST_ROUNDING);
+ v[ 7] = _mm256_add_epi32(u[ 7], k__DCT_CONST_ROUNDING);
+ v[ 8] = _mm256_add_epi32(u[ 8], k__DCT_CONST_ROUNDING);
+ v[ 9] = _mm256_add_epi32(u[ 9], k__DCT_CONST_ROUNDING);
+ v[10] = _mm256_add_epi32(u[10], k__DCT_CONST_ROUNDING);
+ v[11] = _mm256_add_epi32(u[11], k__DCT_CONST_ROUNDING);
+ v[12] = _mm256_add_epi32(u[12], k__DCT_CONST_ROUNDING);
+ v[13] = _mm256_add_epi32(u[13], k__DCT_CONST_ROUNDING);
+ v[14] = _mm256_add_epi32(u[14], k__DCT_CONST_ROUNDING);
+ v[15] = _mm256_add_epi32(u[15], k__DCT_CONST_ROUNDING);
+
+ lstep1[36] = _mm256_srai_epi32(v[ 0], DCT_CONST_BITS);
+ lstep1[37] = _mm256_srai_epi32(v[ 1], DCT_CONST_BITS);
+ lstep1[38] = _mm256_srai_epi32(v[ 2], DCT_CONST_BITS);
+ lstep1[39] = _mm256_srai_epi32(v[ 3], DCT_CONST_BITS);
+ lstep1[40] = _mm256_srai_epi32(v[ 4], DCT_CONST_BITS);
+ lstep1[41] = _mm256_srai_epi32(v[ 5], DCT_CONST_BITS);
+ lstep1[42] = _mm256_srai_epi32(v[ 6], DCT_CONST_BITS);
+ lstep1[43] = _mm256_srai_epi32(v[ 7], DCT_CONST_BITS);
+ lstep1[52] = _mm256_srai_epi32(v[ 8], DCT_CONST_BITS);
+ lstep1[53] = _mm256_srai_epi32(v[ 9], DCT_CONST_BITS);
+ lstep1[54] = _mm256_srai_epi32(v[10], DCT_CONST_BITS);
+ lstep1[55] = _mm256_srai_epi32(v[11], DCT_CONST_BITS);
+ lstep1[56] = _mm256_srai_epi32(v[12], DCT_CONST_BITS);
+ lstep1[57] = _mm256_srai_epi32(v[13], DCT_CONST_BITS);
+ lstep1[58] = _mm256_srai_epi32(v[14], DCT_CONST_BITS);
+ lstep1[59] = _mm256_srai_epi32(v[15], DCT_CONST_BITS);
+ }
+ // stage 5
+ {+ lstep2[ 8] = _mm256_add_epi32(lstep1[10], lstep3[ 8]);
+ lstep2[ 9] = _mm256_add_epi32(lstep1[11], lstep3[ 9]);
+ lstep2[10] = _mm256_sub_epi32(lstep3[ 8], lstep1[10]);
+ lstep2[11] = _mm256_sub_epi32(lstep3[ 9], lstep1[11]);
+ lstep2[12] = _mm256_sub_epi32(lstep3[14], lstep1[12]);
+ lstep2[13] = _mm256_sub_epi32(lstep3[15], lstep1[13]);
+ lstep2[14] = _mm256_add_epi32(lstep1[12], lstep3[14]);
+ lstep2[15] = _mm256_add_epi32(lstep1[13], lstep3[15]);
+ }
+ {+ const __m256i k32_p16_p16 = pair256_set_epi32(cospi_16_64, cospi_16_64);
+ const __m256i k32_p16_m16 = pair256_set_epi32(cospi_16_64, -cospi_16_64);
+ const __m256i k32_p24_p08 = pair256_set_epi32(cospi_24_64, cospi_8_64);
+ const __m256i k32_m08_p24 = pair256_set_epi32(-cospi_8_64, cospi_24_64);
+
+ u[0] = _mm256_unpacklo_epi32(lstep1[0], lstep1[2]);
+ u[1] = _mm256_unpackhi_epi32(lstep1[0], lstep1[2]);
+ u[2] = _mm256_unpacklo_epi32(lstep1[1], lstep1[3]);
+ u[3] = _mm256_unpackhi_epi32(lstep1[1], lstep1[3]);
+ u[4] = _mm256_unpacklo_epi32(lstep1[4], lstep1[6]);
+ u[5] = _mm256_unpackhi_epi32(lstep1[4], lstep1[6]);
+ u[6] = _mm256_unpacklo_epi32(lstep1[5], lstep1[7]);
+ u[7] = _mm256_unpackhi_epi32(lstep1[5], lstep1[7]);
+
+ // TODO(jingning): manually inline k_madd_epi32_avx2_ to further hide
+ // instruction latency.
+ v[ 0] = k_madd_epi32_avx2(u[0], k32_p16_p16);
+ v[ 1] = k_madd_epi32_avx2(u[1], k32_p16_p16);
+ v[ 2] = k_madd_epi32_avx2(u[2], k32_p16_p16);
+ v[ 3] = k_madd_epi32_avx2(u[3], k32_p16_p16);
+ v[ 4] = k_madd_epi32_avx2(u[0], k32_p16_m16);
+ v[ 5] = k_madd_epi32_avx2(u[1], k32_p16_m16);
+ v[ 6] = k_madd_epi32_avx2(u[2], k32_p16_m16);
+ v[ 7] = k_madd_epi32_avx2(u[3], k32_p16_m16);
+ v[ 8] = k_madd_epi32_avx2(u[4], k32_p24_p08);
+ v[ 9] = k_madd_epi32_avx2(u[5], k32_p24_p08);
+ v[10] = k_madd_epi32_avx2(u[6], k32_p24_p08);
+ v[11] = k_madd_epi32_avx2(u[7], k32_p24_p08);
+ v[12] = k_madd_epi32_avx2(u[4], k32_m08_p24);
+ v[13] = k_madd_epi32_avx2(u[5], k32_m08_p24);
+ v[14] = k_madd_epi32_avx2(u[6], k32_m08_p24);
+ v[15] = k_madd_epi32_avx2(u[7], k32_m08_p24);
+
+ u[0] = k_packs_epi64_avx2(v[0], v[1]);
+ u[1] = k_packs_epi64_avx2(v[2], v[3]);
+ u[2] = k_packs_epi64_avx2(v[4], v[5]);
+ u[3] = k_packs_epi64_avx2(v[6], v[7]);
+ u[4] = k_packs_epi64_avx2(v[8], v[9]);
+ u[5] = k_packs_epi64_avx2(v[10], v[11]);
+ u[6] = k_packs_epi64_avx2(v[12], v[13]);
+ u[7] = k_packs_epi64_avx2(v[14], v[15]);
+
+ v[0] = _mm256_add_epi32(u[0], k__DCT_CONST_ROUNDING);
+ v[1] = _mm256_add_epi32(u[1], k__DCT_CONST_ROUNDING);
+ v[2] = _mm256_add_epi32(u[2], k__DCT_CONST_ROUNDING);
+ v[3] = _mm256_add_epi32(u[3], k__DCT_CONST_ROUNDING);
+ v[4] = _mm256_add_epi32(u[4], k__DCT_CONST_ROUNDING);
+ v[5] = _mm256_add_epi32(u[5], k__DCT_CONST_ROUNDING);
+ v[6] = _mm256_add_epi32(u[6], k__DCT_CONST_ROUNDING);
+ v[7] = _mm256_add_epi32(u[7], k__DCT_CONST_ROUNDING);
+
+ u[0] = _mm256_srai_epi32(v[0], DCT_CONST_BITS);
+ u[1] = _mm256_srai_epi32(v[1], DCT_CONST_BITS);
+ u[2] = _mm256_srai_epi32(v[2], DCT_CONST_BITS);
+ u[3] = _mm256_srai_epi32(v[3], DCT_CONST_BITS);
+ u[4] = _mm256_srai_epi32(v[4], DCT_CONST_BITS);
+ u[5] = _mm256_srai_epi32(v[5], DCT_CONST_BITS);
+ u[6] = _mm256_srai_epi32(v[6], DCT_CONST_BITS);
+ u[7] = _mm256_srai_epi32(v[7], DCT_CONST_BITS);
+
+ sign[0] = _mm256_cmpgt_epi32(kZero,u[0]);
+ sign[1] = _mm256_cmpgt_epi32(kZero,u[1]);
+ sign[2] = _mm256_cmpgt_epi32(kZero,u[2]);
+ sign[3] = _mm256_cmpgt_epi32(kZero,u[3]);
+ sign[4] = _mm256_cmpgt_epi32(kZero,u[4]);
+ sign[5] = _mm256_cmpgt_epi32(kZero,u[5]);
+ sign[6] = _mm256_cmpgt_epi32(kZero,u[6]);
+ sign[7] = _mm256_cmpgt_epi32(kZero,u[7]);
+
+ u[0] = _mm256_sub_epi32(u[0], sign[0]);
+ u[1] = _mm256_sub_epi32(u[1], sign[1]);
+ u[2] = _mm256_sub_epi32(u[2], sign[2]);
+ u[3] = _mm256_sub_epi32(u[3], sign[3]);
+ u[4] = _mm256_sub_epi32(u[4], sign[4]);
+ u[5] = _mm256_sub_epi32(u[5], sign[5]);
+ u[6] = _mm256_sub_epi32(u[6], sign[6]);
+ u[7] = _mm256_sub_epi32(u[7], sign[7]);
+
+ u[0] = _mm256_add_epi32(u[0], K32One);
+ u[1] = _mm256_add_epi32(u[1], K32One);
+ u[2] = _mm256_add_epi32(u[2], K32One);
+ u[3] = _mm256_add_epi32(u[3], K32One);
+ u[4] = _mm256_add_epi32(u[4], K32One);
+ u[5] = _mm256_add_epi32(u[5], K32One);
+ u[6] = _mm256_add_epi32(u[6], K32One);
+ u[7] = _mm256_add_epi32(u[7], K32One);
+
+ u[0] = _mm256_srai_epi32(u[0], 2);
+ u[1] = _mm256_srai_epi32(u[1], 2);
+ u[2] = _mm256_srai_epi32(u[2], 2);
+ u[3] = _mm256_srai_epi32(u[3], 2);
+ u[4] = _mm256_srai_epi32(u[4], 2);
+ u[5] = _mm256_srai_epi32(u[5], 2);
+ u[6] = _mm256_srai_epi32(u[6], 2);
+ u[7] = _mm256_srai_epi32(u[7], 2);
+
+ // Combine
+ out[ 0] = _mm256_packs_epi32(u[0], u[1]);
+ out[16] = _mm256_packs_epi32(u[2], u[3]);
+ out[ 8] = _mm256_packs_epi32(u[4], u[5]);
+ out[24] = _mm256_packs_epi32(u[6], u[7]);
+ }
+ {+ const __m256i k32_m08_p24 = pair256_set_epi32(-cospi_8_64, cospi_24_64);
+ const __m256i k32_m24_m08 = pair256_set_epi32(-cospi_24_64, -cospi_8_64);
+ const __m256i k32_p24_p08 = pair256_set_epi32(cospi_24_64, cospi_8_64);
+
+ u[0] = _mm256_unpacklo_epi32(lstep1[18], lstep1[28]);
+ u[1] = _mm256_unpackhi_epi32(lstep1[18], lstep1[28]);
+ u[2] = _mm256_unpacklo_epi32(lstep1[19], lstep1[29]);
+ u[3] = _mm256_unpackhi_epi32(lstep1[19], lstep1[29]);
+ u[4] = _mm256_unpacklo_epi32(lstep1[20], lstep1[26]);
+ u[5] = _mm256_unpackhi_epi32(lstep1[20], lstep1[26]);
+ u[6] = _mm256_unpacklo_epi32(lstep1[21], lstep1[27]);
+ u[7] = _mm256_unpackhi_epi32(lstep1[21], lstep1[27]);
+
+ v[0] = k_madd_epi32_avx2(u[0], k32_m08_p24);
+ v[1] = k_madd_epi32_avx2(u[1], k32_m08_p24);
+ v[2] = k_madd_epi32_avx2(u[2], k32_m08_p24);
+ v[3] = k_madd_epi32_avx2(u[3], k32_m08_p24);
+ v[4] = k_madd_epi32_avx2(u[4], k32_m24_m08);
+ v[5] = k_madd_epi32_avx2(u[5], k32_m24_m08);
+ v[6] = k_madd_epi32_avx2(u[6], k32_m24_m08);
+ v[7] = k_madd_epi32_avx2(u[7], k32_m24_m08);
+ v[ 8] = k_madd_epi32_avx2(u[4], k32_m08_p24);
+ v[ 9] = k_madd_epi32_avx2(u[5], k32_m08_p24);
+ v[10] = k_madd_epi32_avx2(u[6], k32_m08_p24);
+ v[11] = k_madd_epi32_avx2(u[7], k32_m08_p24);
+ v[12] = k_madd_epi32_avx2(u[0], k32_p24_p08);
+ v[13] = k_madd_epi32_avx2(u[1], k32_p24_p08);
+ v[14] = k_madd_epi32_avx2(u[2], k32_p24_p08);
+ v[15] = k_madd_epi32_avx2(u[3], k32_p24_p08);
+
+ u[0] = k_packs_epi64_avx2(v[0], v[1]);
+ u[1] = k_packs_epi64_avx2(v[2], v[3]);
+ u[2] = k_packs_epi64_avx2(v[4], v[5]);
+ u[3] = k_packs_epi64_avx2(v[6], v[7]);
+ u[4] = k_packs_epi64_avx2(v[8], v[9]);
+ u[5] = k_packs_epi64_avx2(v[10], v[11]);
+ u[6] = k_packs_epi64_avx2(v[12], v[13]);
+ u[7] = k_packs_epi64_avx2(v[14], v[15]);
+
+ u[0] = _mm256_add_epi32(u[0], k__DCT_CONST_ROUNDING);
+ u[1] = _mm256_add_epi32(u[1], k__DCT_CONST_ROUNDING);
+ u[2] = _mm256_add_epi32(u[2], k__DCT_CONST_ROUNDING);
+ u[3] = _mm256_add_epi32(u[3], k__DCT_CONST_ROUNDING);
+ u[4] = _mm256_add_epi32(u[4], k__DCT_CONST_ROUNDING);
+ u[5] = _mm256_add_epi32(u[5], k__DCT_CONST_ROUNDING);
+ u[6] = _mm256_add_epi32(u[6], k__DCT_CONST_ROUNDING);
+ u[7] = _mm256_add_epi32(u[7], k__DCT_CONST_ROUNDING);
+
+ lstep2[18] = _mm256_srai_epi32(u[0], DCT_CONST_BITS);
+ lstep2[19] = _mm256_srai_epi32(u[1], DCT_CONST_BITS);
+ lstep2[20] = _mm256_srai_epi32(u[2], DCT_CONST_BITS);
+ lstep2[21] = _mm256_srai_epi32(u[3], DCT_CONST_BITS);
+ lstep2[26] = _mm256_srai_epi32(u[4], DCT_CONST_BITS);
+ lstep2[27] = _mm256_srai_epi32(u[5], DCT_CONST_BITS);
+ lstep2[28] = _mm256_srai_epi32(u[6], DCT_CONST_BITS);
+ lstep2[29] = _mm256_srai_epi32(u[7], DCT_CONST_BITS);
+ }
+ {+ lstep2[32] = _mm256_add_epi32(lstep1[38], lstep3[32]);
+ lstep2[33] = _mm256_add_epi32(lstep1[39], lstep3[33]);
+ lstep2[34] = _mm256_add_epi32(lstep1[36], lstep3[34]);
+ lstep2[35] = _mm256_add_epi32(lstep1[37], lstep3[35]);
+ lstep2[36] = _mm256_sub_epi32(lstep3[34], lstep1[36]);
+ lstep2[37] = _mm256_sub_epi32(lstep3[35], lstep1[37]);
+ lstep2[38] = _mm256_sub_epi32(lstep3[32], lstep1[38]);
+ lstep2[39] = _mm256_sub_epi32(lstep3[33], lstep1[39]);
+ lstep2[40] = _mm256_sub_epi32(lstep3[46], lstep1[40]);
+ lstep2[41] = _mm256_sub_epi32(lstep3[47], lstep1[41]);
+ lstep2[42] = _mm256_sub_epi32(lstep3[44], lstep1[42]);
+ lstep2[43] = _mm256_sub_epi32(lstep3[45], lstep1[43]);
+ lstep2[44] = _mm256_add_epi32(lstep1[42], lstep3[44]);
+ lstep2[45] = _mm256_add_epi32(lstep1[43], lstep3[45]);
+ lstep2[46] = _mm256_add_epi32(lstep1[40], lstep3[46]);
+ lstep2[47] = _mm256_add_epi32(lstep1[41], lstep3[47]);
+ lstep2[48] = _mm256_add_epi32(lstep1[54], lstep3[48]);
+ lstep2[49] = _mm256_add_epi32(lstep1[55], lstep3[49]);
+ lstep2[50] = _mm256_add_epi32(lstep1[52], lstep3[50]);
+ lstep2[51] = _mm256_add_epi32(lstep1[53], lstep3[51]);
+ lstep2[52] = _mm256_sub_epi32(lstep3[50], lstep1[52]);
+ lstep2[53] = _mm256_sub_epi32(lstep3[51], lstep1[53]);
+ lstep2[54] = _mm256_sub_epi32(lstep3[48], lstep1[54]);
+ lstep2[55] = _mm256_sub_epi32(lstep3[49], lstep1[55]);
+ lstep2[56] = _mm256_sub_epi32(lstep3[62], lstep1[56]);
+ lstep2[57] = _mm256_sub_epi32(lstep3[63], lstep1[57]);
+ lstep2[58] = _mm256_sub_epi32(lstep3[60], lstep1[58]);
+ lstep2[59] = _mm256_sub_epi32(lstep3[61], lstep1[59]);
+ lstep2[60] = _mm256_add_epi32(lstep1[58], lstep3[60]);
+ lstep2[61] = _mm256_add_epi32(lstep1[59], lstep3[61]);
+ lstep2[62] = _mm256_add_epi32(lstep1[56], lstep3[62]);
+ lstep2[63] = _mm256_add_epi32(lstep1[57], lstep3[63]);
+ }
+ // stage 6
+ {+ const __m256i k32_p28_p04 = pair256_set_epi32(cospi_28_64, cospi_4_64);
+ const __m256i k32_p12_p20 = pair256_set_epi32(cospi_12_64, cospi_20_64);
+ const __m256i k32_m20_p12 = pair256_set_epi32(-cospi_20_64, cospi_12_64);
+ const __m256i k32_m04_p28 = pair256_set_epi32(-cospi_4_64, cospi_28_64);
+
+ u[0] = _mm256_unpacklo_epi32(lstep2[ 8], lstep2[14]);
+ u[1] = _mm256_unpackhi_epi32(lstep2[ 8], lstep2[14]);
+ u[2] = _mm256_unpacklo_epi32(lstep2[ 9], lstep2[15]);
+ u[3] = _mm256_unpackhi_epi32(lstep2[ 9], lstep2[15]);
+ u[4] = _mm256_unpacklo_epi32(lstep2[10], lstep2[12]);
+ u[5] = _mm256_unpackhi_epi32(lstep2[10], lstep2[12]);
+ u[6] = _mm256_unpacklo_epi32(lstep2[11], lstep2[13]);
+ u[7] = _mm256_unpackhi_epi32(lstep2[11], lstep2[13]);
+ u[8] = _mm256_unpacklo_epi32(lstep2[10], lstep2[12]);
+ u[9] = _mm256_unpackhi_epi32(lstep2[10], lstep2[12]);
+ u[10] = _mm256_unpacklo_epi32(lstep2[11], lstep2[13]);
+ u[11] = _mm256_unpackhi_epi32(lstep2[11], lstep2[13]);
+ u[12] = _mm256_unpacklo_epi32(lstep2[ 8], lstep2[14]);
+ u[13] = _mm256_unpackhi_epi32(lstep2[ 8], lstep2[14]);
+ u[14] = _mm256_unpacklo_epi32(lstep2[ 9], lstep2[15]);
+ u[15] = _mm256_unpackhi_epi32(lstep2[ 9], lstep2[15]);
+
+ v[0] = k_madd_epi32_avx2(u[0], k32_p28_p04);
+ v[1] = k_madd_epi32_avx2(u[1], k32_p28_p04);
+ v[2] = k_madd_epi32_avx2(u[2], k32_p28_p04);
+ v[3] = k_madd_epi32_avx2(u[3], k32_p28_p04);
+ v[4] = k_madd_epi32_avx2(u[4], k32_p12_p20);
+ v[5] = k_madd_epi32_avx2(u[5], k32_p12_p20);
+ v[6] = k_madd_epi32_avx2(u[6], k32_p12_p20);
+ v[7] = k_madd_epi32_avx2(u[7], k32_p12_p20);
+ v[ 8] = k_madd_epi32_avx2(u[ 8], k32_m20_p12);
+ v[ 9] = k_madd_epi32_avx2(u[ 9], k32_m20_p12);
+ v[10] = k_madd_epi32_avx2(u[10], k32_m20_p12);
+ v[11] = k_madd_epi32_avx2(u[11], k32_m20_p12);
+ v[12] = k_madd_epi32_avx2(u[12], k32_m04_p28);
+ v[13] = k_madd_epi32_avx2(u[13], k32_m04_p28);
+ v[14] = k_madd_epi32_avx2(u[14], k32_m04_p28);
+ v[15] = k_madd_epi32_avx2(u[15], k32_m04_p28);
+
+ u[0] = k_packs_epi64_avx2(v[0], v[1]);
+ u[1] = k_packs_epi64_avx2(v[2], v[3]);
+ u[2] = k_packs_epi64_avx2(v[4], v[5]);
+ u[3] = k_packs_epi64_avx2(v[6], v[7]);
+ u[4] = k_packs_epi64_avx2(v[8], v[9]);
+ u[5] = k_packs_epi64_avx2(v[10], v[11]);
+ u[6] = k_packs_epi64_avx2(v[12], v[13]);
+ u[7] = k_packs_epi64_avx2(v[14], v[15]);
+
+ v[0] = _mm256_add_epi32(u[0], k__DCT_CONST_ROUNDING);
+ v[1] = _mm256_add_epi32(u[1], k__DCT_CONST_ROUNDING);
+ v[2] = _mm256_add_epi32(u[2], k__DCT_CONST_ROUNDING);
+ v[3] = _mm256_add_epi32(u[3], k__DCT_CONST_ROUNDING);
+ v[4] = _mm256_add_epi32(u[4], k__DCT_CONST_ROUNDING);
+ v[5] = _mm256_add_epi32(u[5], k__DCT_CONST_ROUNDING);
+ v[6] = _mm256_add_epi32(u[6], k__DCT_CONST_ROUNDING);
+ v[7] = _mm256_add_epi32(u[7], k__DCT_CONST_ROUNDING);
+
+ u[0] = _mm256_srai_epi32(v[0], DCT_CONST_BITS);
+ u[1] = _mm256_srai_epi32(v[1], DCT_CONST_BITS);
+ u[2] = _mm256_srai_epi32(v[2], DCT_CONST_BITS);
+ u[3] = _mm256_srai_epi32(v[3], DCT_CONST_BITS);
+ u[4] = _mm256_srai_epi32(v[4], DCT_CONST_BITS);
+ u[5] = _mm256_srai_epi32(v[5], DCT_CONST_BITS);
+ u[6] = _mm256_srai_epi32(v[6], DCT_CONST_BITS);
+ u[7] = _mm256_srai_epi32(v[7], DCT_CONST_BITS);
+
+ sign[0] = _mm256_cmpgt_epi32(kZero,u[0]);
+ sign[1] = _mm256_cmpgt_epi32(kZero,u[1]);
+ sign[2] = _mm256_cmpgt_epi32(kZero,u[2]);
+ sign[3] = _mm256_cmpgt_epi32(kZero,u[3]);
+ sign[4] = _mm256_cmpgt_epi32(kZero,u[4]);
+ sign[5] = _mm256_cmpgt_epi32(kZero,u[5]);
+ sign[6] = _mm256_cmpgt_epi32(kZero,u[6]);
+ sign[7] = _mm256_cmpgt_epi32(kZero,u[7]);
+
+ u[0] = _mm256_sub_epi32(u[0], sign[0]);
+ u[1] = _mm256_sub_epi32(u[1], sign[1]);
+ u[2] = _mm256_sub_epi32(u[2], sign[2]);
+ u[3] = _mm256_sub_epi32(u[3], sign[3]);
+ u[4] = _mm256_sub_epi32(u[4], sign[4]);
+ u[5] = _mm256_sub_epi32(u[5], sign[5]);
+ u[6] = _mm256_sub_epi32(u[6], sign[6]);
+ u[7] = _mm256_sub_epi32(u[7], sign[7]);
+
+ u[0] = _mm256_add_epi32(u[0], K32One);
+ u[1] = _mm256_add_epi32(u[1], K32One);
+ u[2] = _mm256_add_epi32(u[2], K32One);
+ u[3] = _mm256_add_epi32(u[3], K32One);
+ u[4] = _mm256_add_epi32(u[4], K32One);
+ u[5] = _mm256_add_epi32(u[5], K32One);
+ u[6] = _mm256_add_epi32(u[6], K32One);
+ u[7] = _mm256_add_epi32(u[7], K32One);
+
+ u[0] = _mm256_srai_epi32(u[0], 2);
+ u[1] = _mm256_srai_epi32(u[1], 2);
+ u[2] = _mm256_srai_epi32(u[2], 2);
+ u[3] = _mm256_srai_epi32(u[3], 2);
+ u[4] = _mm256_srai_epi32(u[4], 2);
+ u[5] = _mm256_srai_epi32(u[5], 2);
+ u[6] = _mm256_srai_epi32(u[6], 2);
+ u[7] = _mm256_srai_epi32(u[7], 2);
+
+ out[ 4] = _mm256_packs_epi32(u[0], u[1]);
+ out[20] = _mm256_packs_epi32(u[2], u[3]);
+ out[12] = _mm256_packs_epi32(u[4], u[5]);
+ out[28] = _mm256_packs_epi32(u[6], u[7]);
+ }
+ {+ lstep3[16] = _mm256_add_epi32(lstep2[18], lstep1[16]);
+ lstep3[17] = _mm256_add_epi32(lstep2[19], lstep1[17]);
+ lstep3[18] = _mm256_sub_epi32(lstep1[16], lstep2[18]);
+ lstep3[19] = _mm256_sub_epi32(lstep1[17], lstep2[19]);
+ lstep3[20] = _mm256_sub_epi32(lstep1[22], lstep2[20]);
+ lstep3[21] = _mm256_sub_epi32(lstep1[23], lstep2[21]);
+ lstep3[22] = _mm256_add_epi32(lstep2[20], lstep1[22]);
+ lstep3[23] = _mm256_add_epi32(lstep2[21], lstep1[23]);
+ lstep3[24] = _mm256_add_epi32(lstep2[26], lstep1[24]);
+ lstep3[25] = _mm256_add_epi32(lstep2[27], lstep1[25]);
+ lstep3[26] = _mm256_sub_epi32(lstep1[24], lstep2[26]);
+ lstep3[27] = _mm256_sub_epi32(lstep1[25], lstep2[27]);
+ lstep3[28] = _mm256_sub_epi32(lstep1[30], lstep2[28]);
+ lstep3[29] = _mm256_sub_epi32(lstep1[31], lstep2[29]);
+ lstep3[30] = _mm256_add_epi32(lstep2[28], lstep1[30]);
+ lstep3[31] = _mm256_add_epi32(lstep2[29], lstep1[31]);
+ }
+ {+ const __m256i k32_m04_p28 = pair256_set_epi32(-cospi_4_64, cospi_28_64);
+ const __m256i k32_m28_m04 = pair256_set_epi32(-cospi_28_64, -cospi_4_64);
+ const __m256i k32_m20_p12 = pair256_set_epi32(-cospi_20_64, cospi_12_64);
+ const __m256i k32_m12_m20 = pair256_set_epi32(-cospi_12_64,
+ -cospi_20_64);
+ const __m256i k32_p12_p20 = pair256_set_epi32(cospi_12_64, cospi_20_64);
+ const __m256i k32_p28_p04 = pair256_set_epi32(cospi_28_64, cospi_4_64);
+
+ u[ 0] = _mm256_unpacklo_epi32(lstep2[34], lstep2[60]);
+ u[ 1] = _mm256_unpackhi_epi32(lstep2[34], lstep2[60]);
+ u[ 2] = _mm256_unpacklo_epi32(lstep2[35], lstep2[61]);
+ u[ 3] = _mm256_unpackhi_epi32(lstep2[35], lstep2[61]);
+ u[ 4] = _mm256_unpacklo_epi32(lstep2[36], lstep2[58]);
+ u[ 5] = _mm256_unpackhi_epi32(lstep2[36], lstep2[58]);
+ u[ 6] = _mm256_unpacklo_epi32(lstep2[37], lstep2[59]);
+ u[ 7] = _mm256_unpackhi_epi32(lstep2[37], lstep2[59]);
+ u[ 8] = _mm256_unpacklo_epi32(lstep2[42], lstep2[52]);
+ u[ 9] = _mm256_unpackhi_epi32(lstep2[42], lstep2[52]);
+ u[10] = _mm256_unpacklo_epi32(lstep2[43], lstep2[53]);
+ u[11] = _mm256_unpackhi_epi32(lstep2[43], lstep2[53]);
+ u[12] = _mm256_unpacklo_epi32(lstep2[44], lstep2[50]);
+ u[13] = _mm256_unpackhi_epi32(lstep2[44], lstep2[50]);
+ u[14] = _mm256_unpacklo_epi32(lstep2[45], lstep2[51]);
+ u[15] = _mm256_unpackhi_epi32(lstep2[45], lstep2[51]);
+
+ v[ 0] = k_madd_epi32_avx2(u[ 0], k32_m04_p28);
+ v[ 1] = k_madd_epi32_avx2(u[ 1], k32_m04_p28);
+ v[ 2] = k_madd_epi32_avx2(u[ 2], k32_m04_p28);
+ v[ 3] = k_madd_epi32_avx2(u[ 3], k32_m04_p28);
+ v[ 4] = k_madd_epi32_avx2(u[ 4], k32_m28_m04);
+ v[ 5] = k_madd_epi32_avx2(u[ 5], k32_m28_m04);
+ v[ 6] = k_madd_epi32_avx2(u[ 6], k32_m28_m04);
+ v[ 7] = k_madd_epi32_avx2(u[ 7], k32_m28_m04);
+ v[ 8] = k_madd_epi32_avx2(u[ 8], k32_m20_p12);
+ v[ 9] = k_madd_epi32_avx2(u[ 9], k32_m20_p12);
+ v[10] = k_madd_epi32_avx2(u[10], k32_m20_p12);
+ v[11] = k_madd_epi32_avx2(u[11], k32_m20_p12);
+ v[12] = k_madd_epi32_avx2(u[12], k32_m12_m20);
+ v[13] = k_madd_epi32_avx2(u[13], k32_m12_m20);
+ v[14] = k_madd_epi32_avx2(u[14], k32_m12_m20);
+ v[15] = k_madd_epi32_avx2(u[15], k32_m12_m20);
+ v[16] = k_madd_epi32_avx2(u[12], k32_m20_p12);
+ v[17] = k_madd_epi32_avx2(u[13], k32_m20_p12);
+ v[18] = k_madd_epi32_avx2(u[14], k32_m20_p12);
+ v[19] = k_madd_epi32_avx2(u[15], k32_m20_p12);
+ v[20] = k_madd_epi32_avx2(u[ 8], k32_p12_p20);
+ v[21] = k_madd_epi32_avx2(u[ 9], k32_p12_p20);
+ v[22] = k_madd_epi32_avx2(u[10], k32_p12_p20);
+ v[23] = k_madd_epi32_avx2(u[11], k32_p12_p20);
+ v[24] = k_madd_epi32_avx2(u[ 4], k32_m04_p28);
+ v[25] = k_madd_epi32_avx2(u[ 5], k32_m04_p28);
+ v[26] = k_madd_epi32_avx2(u[ 6], k32_m04_p28);
+ v[27] = k_madd_epi32_avx2(u[ 7], k32_m04_p28);
+ v[28] = k_madd_epi32_avx2(u[ 0], k32_p28_p04);
+ v[29] = k_madd_epi32_avx2(u[ 1], k32_p28_p04);
+ v[30] = k_madd_epi32_avx2(u[ 2], k32_p28_p04);
+ v[31] = k_madd_epi32_avx2(u[ 3], k32_p28_p04);
+
+ u[ 0] = k_packs_epi64_avx2(v[ 0], v[ 1]);
+ u[ 1] = k_packs_epi64_avx2(v[ 2], v[ 3]);
+ u[ 2] = k_packs_epi64_avx2(v[ 4], v[ 5]);
+ u[ 3] = k_packs_epi64_avx2(v[ 6], v[ 7]);
+ u[ 4] = k_packs_epi64_avx2(v[ 8], v[ 9]);
+ u[ 5] = k_packs_epi64_avx2(v[10], v[11]);
+ u[ 6] = k_packs_epi64_avx2(v[12], v[13]);
+ u[ 7] = k_packs_epi64_avx2(v[14], v[15]);
+ u[ 8] = k_packs_epi64_avx2(v[16], v[17]);
+ u[ 9] = k_packs_epi64_avx2(v[18], v[19]);
+ u[10] = k_packs_epi64_avx2(v[20], v[21]);
+ u[11] = k_packs_epi64_avx2(v[22], v[23]);
+ u[12] = k_packs_epi64_avx2(v[24], v[25]);
+ u[13] = k_packs_epi64_avx2(v[26], v[27]);
+ u[14] = k_packs_epi64_avx2(v[28], v[29]);
+ u[15] = k_packs_epi64_avx2(v[30], v[31]);
+
+ v[ 0] = _mm256_add_epi32(u[ 0], k__DCT_CONST_ROUNDING);
+ v[ 1] = _mm256_add_epi32(u[ 1], k__DCT_CONST_ROUNDING);
+ v[ 2] = _mm256_add_epi32(u[ 2], k__DCT_CONST_ROUNDING);
+ v[ 3] = _mm256_add_epi32(u[ 3], k__DCT_CONST_ROUNDING);
+ v[ 4] = _mm256_add_epi32(u[ 4], k__DCT_CONST_ROUNDING);
+ v[ 5] = _mm256_add_epi32(u[ 5], k__DCT_CONST_ROUNDING);
+ v[ 6] = _mm256_add_epi32(u[ 6], k__DCT_CONST_ROUNDING);
+ v[ 7] = _mm256_add_epi32(u[ 7], k__DCT_CONST_ROUNDING);
+ v[ 8] = _mm256_add_epi32(u[ 8], k__DCT_CONST_ROUNDING);
+ v[ 9] = _mm256_add_epi32(u[ 9], k__DCT_CONST_ROUNDING);
+ v[10] = _mm256_add_epi32(u[10], k__DCT_CONST_ROUNDING);
+ v[11] = _mm256_add_epi32(u[11], k__DCT_CONST_ROUNDING);
+ v[12] = _mm256_add_epi32(u[12], k__DCT_CONST_ROUNDING);
+ v[13] = _mm256_add_epi32(u[13], k__DCT_CONST_ROUNDING);
+ v[14] = _mm256_add_epi32(u[14], k__DCT_CONST_ROUNDING);
+ v[15] = _mm256_add_epi32(u[15], k__DCT_CONST_ROUNDING);
+
+ lstep3[34] = _mm256_srai_epi32(v[ 0], DCT_CONST_BITS);
+ lstep3[35] = _mm256_srai_epi32(v[ 1], DCT_CONST_BITS);
+ lstep3[36] = _mm256_srai_epi32(v[ 2], DCT_CONST_BITS);
+ lstep3[37] = _mm256_srai_epi32(v[ 3], DCT_CONST_BITS);
+ lstep3[42] = _mm256_srai_epi32(v[ 4], DCT_CONST_BITS);
+ lstep3[43] = _mm256_srai_epi32(v[ 5], DCT_CONST_BITS);
+ lstep3[44] = _mm256_srai_epi32(v[ 6], DCT_CONST_BITS);
+ lstep3[45] = _mm256_srai_epi32(v[ 7], DCT_CONST_BITS);
+ lstep3[50] = _mm256_srai_epi32(v[ 8], DCT_CONST_BITS);
+ lstep3[51] = _mm256_srai_epi32(v[ 9], DCT_CONST_BITS);
+ lstep3[52] = _mm256_srai_epi32(v[10], DCT_CONST_BITS);
+ lstep3[53] = _mm256_srai_epi32(v[11], DCT_CONST_BITS);
+ lstep3[58] = _mm256_srai_epi32(v[12], DCT_CONST_BITS);
+ lstep3[59] = _mm256_srai_epi32(v[13], DCT_CONST_BITS);
+ lstep3[60] = _mm256_srai_epi32(v[14], DCT_CONST_BITS);
+ lstep3[61] = _mm256_srai_epi32(v[15], DCT_CONST_BITS);
+ }
+ // stage 7
+ {+ const __m256i k32_p30_p02 = pair256_set_epi32(cospi_30_64, cospi_2_64);
+ const __m256i k32_p14_p18 = pair256_set_epi32(cospi_14_64, cospi_18_64);
+ const __m256i k32_p22_p10 = pair256_set_epi32(cospi_22_64, cospi_10_64);
+ const __m256i k32_p06_p26 = pair256_set_epi32(cospi_6_64, cospi_26_64);
+ const __m256i k32_m26_p06 = pair256_set_epi32(-cospi_26_64, cospi_6_64);
+ const __m256i k32_m10_p22 = pair256_set_epi32(-cospi_10_64, cospi_22_64);
+ const __m256i k32_m18_p14 = pair256_set_epi32(-cospi_18_64, cospi_14_64);
+ const __m256i k32_m02_p30 = pair256_set_epi32(-cospi_2_64, cospi_30_64);
+
+ u[ 0] = _mm256_unpacklo_epi32(lstep3[16], lstep3[30]);
+ u[ 1] = _mm256_unpackhi_epi32(lstep3[16], lstep3[30]);
+ u[ 2] = _mm256_unpacklo_epi32(lstep3[17], lstep3[31]);
+ u[ 3] = _mm256_unpackhi_epi32(lstep3[17], lstep3[31]);
+ u[ 4] = _mm256_unpacklo_epi32(lstep3[18], lstep3[28]);
+ u[ 5] = _mm256_unpackhi_epi32(lstep3[18], lstep3[28]);
+ u[ 6] = _mm256_unpacklo_epi32(lstep3[19], lstep3[29]);
+ u[ 7] = _mm256_unpackhi_epi32(lstep3[19], lstep3[29]);
+ u[ 8] = _mm256_unpacklo_epi32(lstep3[20], lstep3[26]);
+ u[ 9] = _mm256_unpackhi_epi32(lstep3[20], lstep3[26]);
+ u[10] = _mm256_unpacklo_epi32(lstep3[21], lstep3[27]);
+ u[11] = _mm256_unpackhi_epi32(lstep3[21], lstep3[27]);
+ u[12] = _mm256_unpacklo_epi32(lstep3[22], lstep3[24]);
+ u[13] = _mm256_unpackhi_epi32(lstep3[22], lstep3[24]);
+ u[14] = _mm256_unpacklo_epi32(lstep3[23], lstep3[25]);
+ u[15] = _mm256_unpackhi_epi32(lstep3[23], lstep3[25]);
+
+ v[ 0] = k_madd_epi32_avx2(u[ 0], k32_p30_p02);
+ v[ 1] = k_madd_epi32_avx2(u[ 1], k32_p30_p02);
+ v[ 2] = k_madd_epi32_avx2(u[ 2], k32_p30_p02);
+ v[ 3] = k_madd_epi32_avx2(u[ 3], k32_p30_p02);
+ v[ 4] = k_madd_epi32_avx2(u[ 4], k32_p14_p18);
+ v[ 5] = k_madd_epi32_avx2(u[ 5], k32_p14_p18);
+ v[ 6] = k_madd_epi32_avx2(u[ 6], k32_p14_p18);
+ v[ 7] = k_madd_epi32_avx2(u[ 7], k32_p14_p18);
+ v[ 8] = k_madd_epi32_avx2(u[ 8], k32_p22_p10);
+ v[ 9] = k_madd_epi32_avx2(u[ 9], k32_p22_p10);
+ v[10] = k_madd_epi32_avx2(u[10], k32_p22_p10);
+ v[11] = k_madd_epi32_avx2(u[11], k32_p22_p10);
+ v[12] = k_madd_epi32_avx2(u[12], k32_p06_p26);
+ v[13] = k_madd_epi32_avx2(u[13], k32_p06_p26);
+ v[14] = k_madd_epi32_avx2(u[14], k32_p06_p26);
+ v[15] = k_madd_epi32_avx2(u[15], k32_p06_p26);
+ v[16] = k_madd_epi32_avx2(u[12], k32_m26_p06);
+ v[17] = k_madd_epi32_avx2(u[13], k32_m26_p06);
+ v[18] = k_madd_epi32_avx2(u[14], k32_m26_p06);
+ v[19] = k_madd_epi32_avx2(u[15], k32_m26_p06);
+ v[20] = k_madd_epi32_avx2(u[ 8], k32_m10_p22);
+ v[21] = k_madd_epi32_avx2(u[ 9], k32_m10_p22);
+ v[22] = k_madd_epi32_avx2(u[10], k32_m10_p22);
+ v[23] = k_madd_epi32_avx2(u[11], k32_m10_p22);
+ v[24] = k_madd_epi32_avx2(u[ 4], k32_m18_p14);
+ v[25] = k_madd_epi32_avx2(u[ 5], k32_m18_p14);
+ v[26] = k_madd_epi32_avx2(u[ 6], k32_m18_p14);
+ v[27] = k_madd_epi32_avx2(u[ 7], k32_m18_p14);
+ v[28] = k_madd_epi32_avx2(u[ 0], k32_m02_p30);
+ v[29] = k_madd_epi32_avx2(u[ 1], k32_m02_p30);
+ v[30] = k_madd_epi32_avx2(u[ 2], k32_m02_p30);
+ v[31] = k_madd_epi32_avx2(u[ 3], k32_m02_p30);
+
+ u[ 0] = k_packs_epi64_avx2(v[ 0], v[ 1]);
+ u[ 1] = k_packs_epi64_avx2(v[ 2], v[ 3]);
+ u[ 2] = k_packs_epi64_avx2(v[ 4], v[ 5]);
+ u[ 3] = k_packs_epi64_avx2(v[ 6], v[ 7]);
+ u[ 4] = k_packs_epi64_avx2(v[ 8], v[ 9]);
+ u[ 5] = k_packs_epi64_avx2(v[10], v[11]);
+ u[ 6] = k_packs_epi64_avx2(v[12], v[13]);
+ u[ 7] = k_packs_epi64_avx2(v[14], v[15]);
+ u[ 8] = k_packs_epi64_avx2(v[16], v[17]);
+ u[ 9] = k_packs_epi64_avx2(v[18], v[19]);
+ u[10] = k_packs_epi64_avx2(v[20], v[21]);
+ u[11] = k_packs_epi64_avx2(v[22], v[23]);
+ u[12] = k_packs_epi64_avx2(v[24], v[25]);
+ u[13] = k_packs_epi64_avx2(v[26], v[27]);
+ u[14] = k_packs_epi64_avx2(v[28], v[29]);
+ u[15] = k_packs_epi64_avx2(v[30], v[31]);
+
+ v[ 0] = _mm256_add_epi32(u[ 0], k__DCT_CONST_ROUNDING);
+ v[ 1] = _mm256_add_epi32(u[ 1], k__DCT_CONST_ROUNDING);
+ v[ 2] = _mm256_add_epi32(u[ 2], k__DCT_CONST_ROUNDING);
+ v[ 3] = _mm256_add_epi32(u[ 3], k__DCT_CONST_ROUNDING);
+ v[ 4] = _mm256_add_epi32(u[ 4], k__DCT_CONST_ROUNDING);
+ v[ 5] = _mm256_add_epi32(u[ 5], k__DCT_CONST_ROUNDING);
+ v[ 6] = _mm256_add_epi32(u[ 6], k__DCT_CONST_ROUNDING);
+ v[ 7] = _mm256_add_epi32(u[ 7], k__DCT_CONST_ROUNDING);
+ v[ 8] = _mm256_add_epi32(u[ 8], k__DCT_CONST_ROUNDING);
+ v[ 9] = _mm256_add_epi32(u[ 9], k__DCT_CONST_ROUNDING);
+ v[10] = _mm256_add_epi32(u[10], k__DCT_CONST_ROUNDING);
+ v[11] = _mm256_add_epi32(u[11], k__DCT_CONST_ROUNDING);
+ v[12] = _mm256_add_epi32(u[12], k__DCT_CONST_ROUNDING);
+ v[13] = _mm256_add_epi32(u[13], k__DCT_CONST_ROUNDING);
+ v[14] = _mm256_add_epi32(u[14], k__DCT_CONST_ROUNDING);
+ v[15] = _mm256_add_epi32(u[15], k__DCT_CONST_ROUNDING);
+
+ u[ 0] = _mm256_srai_epi32(v[ 0], DCT_CONST_BITS);
+ u[ 1] = _mm256_srai_epi32(v[ 1], DCT_CONST_BITS);
+ u[ 2] = _mm256_srai_epi32(v[ 2], DCT_CONST_BITS);
+ u[ 3] = _mm256_srai_epi32(v[ 3], DCT_CONST_BITS);
+ u[ 4] = _mm256_srai_epi32(v[ 4], DCT_CONST_BITS);
+ u[ 5] = _mm256_srai_epi32(v[ 5], DCT_CONST_BITS);
+ u[ 6] = _mm256_srai_epi32(v[ 6], DCT_CONST_BITS);
+ u[ 7] = _mm256_srai_epi32(v[ 7], DCT_CONST_BITS);
+ u[ 8] = _mm256_srai_epi32(v[ 8], DCT_CONST_BITS);
+ u[ 9] = _mm256_srai_epi32(v[ 9], DCT_CONST_BITS);
+ u[10] = _mm256_srai_epi32(v[10], DCT_CONST_BITS);
+ u[11] = _mm256_srai_epi32(v[11], DCT_CONST_BITS);
+ u[12] = _mm256_srai_epi32(v[12], DCT_CONST_BITS);
+ u[13] = _mm256_srai_epi32(v[13], DCT_CONST_BITS);
+ u[14] = _mm256_srai_epi32(v[14], DCT_CONST_BITS);
+ u[15] = _mm256_srai_epi32(v[15], DCT_CONST_BITS);
+
+ v[ 0] = _mm256_cmpgt_epi32(kZero,u[ 0]);
+ v[ 1] = _mm256_cmpgt_epi32(kZero,u[ 1]);
+ v[ 2] = _mm256_cmpgt_epi32(kZero,u[ 2]);
+ v[ 3] = _mm256_cmpgt_epi32(kZero,u[ 3]);
+ v[ 4] = _mm256_cmpgt_epi32(kZero,u[ 4]);
+ v[ 5] = _mm256_cmpgt_epi32(kZero,u[ 5]);
+ v[ 6] = _mm256_cmpgt_epi32(kZero,u[ 6]);
+ v[ 7] = _mm256_cmpgt_epi32(kZero,u[ 7]);
+ v[ 8] = _mm256_cmpgt_epi32(kZero,u[ 8]);
+ v[ 9] = _mm256_cmpgt_epi32(kZero,u[ 9]);
+ v[10] = _mm256_cmpgt_epi32(kZero,u[10]);
+ v[11] = _mm256_cmpgt_epi32(kZero,u[11]);
+ v[12] = _mm256_cmpgt_epi32(kZero,u[12]);
+ v[13] = _mm256_cmpgt_epi32(kZero,u[13]);
+ v[14] = _mm256_cmpgt_epi32(kZero,u[14]);
+ v[15] = _mm256_cmpgt_epi32(kZero,u[15]);
+
+ u[ 0] = _mm256_sub_epi32(u[ 0], v[ 0]);
+ u[ 1] = _mm256_sub_epi32(u[ 1], v[ 1]);
+ u[ 2] = _mm256_sub_epi32(u[ 2], v[ 2]);
+ u[ 3] = _mm256_sub_epi32(u[ 3], v[ 3]);
+ u[ 4] = _mm256_sub_epi32(u[ 4], v[ 4]);
+ u[ 5] = _mm256_sub_epi32(u[ 5], v[ 5]);
+ u[ 6] = _mm256_sub_epi32(u[ 6], v[ 6]);
+ u[ 7] = _mm256_sub_epi32(u[ 7], v[ 7]);
+ u[ 8] = _mm256_sub_epi32(u[ 8], v[ 8]);
+ u[ 9] = _mm256_sub_epi32(u[ 9], v[ 9]);
+ u[10] = _mm256_sub_epi32(u[10], v[10]);
+ u[11] = _mm256_sub_epi32(u[11], v[11]);
+ u[12] = _mm256_sub_epi32(u[12], v[12]);
+ u[13] = _mm256_sub_epi32(u[13], v[13]);
+ u[14] = _mm256_sub_epi32(u[14], v[14]);
+ u[15] = _mm256_sub_epi32(u[15], v[15]);
+
+ v[ 0] = _mm256_add_epi32(u[ 0], K32One);
+ v[ 1] = _mm256_add_epi32(u[ 1], K32One);
+ v[ 2] = _mm256_add_epi32(u[ 2], K32One);
+ v[ 3] = _mm256_add_epi32(u[ 3], K32One);
+ v[ 4] = _mm256_add_epi32(u[ 4], K32One);
+ v[ 5] = _mm256_add_epi32(u[ 5], K32One);
+ v[ 6] = _mm256_add_epi32(u[ 6], K32One);
+ v[ 7] = _mm256_add_epi32(u[ 7], K32One);
+ v[ 8] = _mm256_add_epi32(u[ 8], K32One);
+ v[ 9] = _mm256_add_epi32(u[ 9], K32One);
+ v[10] = _mm256_add_epi32(u[10], K32One);
+ v[11] = _mm256_add_epi32(u[11], K32One);
+ v[12] = _mm256_add_epi32(u[12], K32One);
+ v[13] = _mm256_add_epi32(u[13], K32One);
+ v[14] = _mm256_add_epi32(u[14], K32One);
+ v[15] = _mm256_add_epi32(u[15], K32One);
+
+ u[ 0] = _mm256_srai_epi32(v[ 0], 2);
+ u[ 1] = _mm256_srai_epi32(v[ 1], 2);
+ u[ 2] = _mm256_srai_epi32(v[ 2], 2);
+ u[ 3] = _mm256_srai_epi32(v[ 3], 2);
+ u[ 4] = _mm256_srai_epi32(v[ 4], 2);
+ u[ 5] = _mm256_srai_epi32(v[ 5], 2);
+ u[ 6] = _mm256_srai_epi32(v[ 6], 2);
+ u[ 7] = _mm256_srai_epi32(v[ 7], 2);
+ u[ 8] = _mm256_srai_epi32(v[ 8], 2);
+ u[ 9] = _mm256_srai_epi32(v[ 9], 2);
+ u[10] = _mm256_srai_epi32(v[10], 2);
+ u[11] = _mm256_srai_epi32(v[11], 2);
+ u[12] = _mm256_srai_epi32(v[12], 2);
+ u[13] = _mm256_srai_epi32(v[13], 2);
+ u[14] = _mm256_srai_epi32(v[14], 2);
+ u[15] = _mm256_srai_epi32(v[15], 2);
+
+ out[ 2] = _mm256_packs_epi32(u[0], u[1]);
+ out[18] = _mm256_packs_epi32(u[2], u[3]);
+ out[10] = _mm256_packs_epi32(u[4], u[5]);
+ out[26] = _mm256_packs_epi32(u[6], u[7]);
+ out[ 6] = _mm256_packs_epi32(u[8], u[9]);
+ out[22] = _mm256_packs_epi32(u[10], u[11]);
+ out[14] = _mm256_packs_epi32(u[12], u[13]);
+ out[30] = _mm256_packs_epi32(u[14], u[15]);
+ }
+ {+ lstep1[32] = _mm256_add_epi32(lstep3[34], lstep2[32]);
+ lstep1[33] = _mm256_add_epi32(lstep3[35], lstep2[33]);
+ lstep1[34] = _mm256_sub_epi32(lstep2[32], lstep3[34]);
+ lstep1[35] = _mm256_sub_epi32(lstep2[33], lstep3[35]);
+ lstep1[36] = _mm256_sub_epi32(lstep2[38], lstep3[36]);
+ lstep1[37] = _mm256_sub_epi32(lstep2[39], lstep3[37]);
+ lstep1[38] = _mm256_add_epi32(lstep3[36], lstep2[38]);
+ lstep1[39] = _mm256_add_epi32(lstep3[37], lstep2[39]);
+ lstep1[40] = _mm256_add_epi32(lstep3[42], lstep2[40]);
+ lstep1[41] = _mm256_add_epi32(lstep3[43], lstep2[41]);
+ lstep1[42] = _mm256_sub_epi32(lstep2[40], lstep3[42]);
+ lstep1[43] = _mm256_sub_epi32(lstep2[41], lstep3[43]);
+ lstep1[44] = _mm256_sub_epi32(lstep2[46], lstep3[44]);
+ lstep1[45] = _mm256_sub_epi32(lstep2[47], lstep3[45]);
+ lstep1[46] = _mm256_add_epi32(lstep3[44], lstep2[46]);
+ lstep1[47] = _mm256_add_epi32(lstep3[45], lstep2[47]);
+ lstep1[48] = _mm256_add_epi32(lstep3[50], lstep2[48]);
+ lstep1[49] = _mm256_add_epi32(lstep3[51], lstep2[49]);
+ lstep1[50] = _mm256_sub_epi32(lstep2[48], lstep3[50]);
+ lstep1[51] = _mm256_sub_epi32(lstep2[49], lstep3[51]);
+ lstep1[52] = _mm256_sub_epi32(lstep2[54], lstep3[52]);
+ lstep1[53] = _mm256_sub_epi32(lstep2[55], lstep3[53]);
+ lstep1[54] = _mm256_add_epi32(lstep3[52], lstep2[54]);
+ lstep1[55] = _mm256_add_epi32(lstep3[53], lstep2[55]);
+ lstep1[56] = _mm256_add_epi32(lstep3[58], lstep2[56]);
+ lstep1[57] = _mm256_add_epi32(lstep3[59], lstep2[57]);
+ lstep1[58] = _mm256_sub_epi32(lstep2[56], lstep3[58]);
+ lstep1[59] = _mm256_sub_epi32(lstep2[57], lstep3[59]);
+ lstep1[60] = _mm256_sub_epi32(lstep2[62], lstep3[60]);
+ lstep1[61] = _mm256_sub_epi32(lstep2[63], lstep3[61]);
+ lstep1[62] = _mm256_add_epi32(lstep3[60], lstep2[62]);
+ lstep1[63] = _mm256_add_epi32(lstep3[61], lstep2[63]);
+ }
+ // stage 8
+ {+ const __m256i k32_p31_p01 = pair256_set_epi32(cospi_31_64, cospi_1_64);
+ const __m256i k32_p15_p17 = pair256_set_epi32(cospi_15_64, cospi_17_64);
+ const __m256i k32_p23_p09 = pair256_set_epi32(cospi_23_64, cospi_9_64);
+ const __m256i k32_p07_p25 = pair256_set_epi32(cospi_7_64, cospi_25_64);
+ const __m256i k32_m25_p07 = pair256_set_epi32(-cospi_25_64, cospi_7_64);
+ const __m256i k32_m09_p23 = pair256_set_epi32(-cospi_9_64, cospi_23_64);
+ const __m256i k32_m17_p15 = pair256_set_epi32(-cospi_17_64, cospi_15_64);
+ const __m256i k32_m01_p31 = pair256_set_epi32(-cospi_1_64, cospi_31_64);
+
+ u[ 0] = _mm256_unpacklo_epi32(lstep1[32], lstep1[62]);
+ u[ 1] = _mm256_unpackhi_epi32(lstep1[32], lstep1[62]);
+ u[ 2] = _mm256_unpacklo_epi32(lstep1[33], lstep1[63]);
+ u[ 3] = _mm256_unpackhi_epi32(lstep1[33], lstep1[63]);
+ u[ 4] = _mm256_unpacklo_epi32(lstep1[34], lstep1[60]);
+ u[ 5] = _mm256_unpackhi_epi32(lstep1[34], lstep1[60]);
+ u[ 6] = _mm256_unpacklo_epi32(lstep1[35], lstep1[61]);
+ u[ 7] = _mm256_unpackhi_epi32(lstep1[35], lstep1[61]);
+ u[ 8] = _mm256_unpacklo_epi32(lstep1[36], lstep1[58]);
+ u[ 9] = _mm256_unpackhi_epi32(lstep1[36], lstep1[58]);
+ u[10] = _mm256_unpacklo_epi32(lstep1[37], lstep1[59]);
+ u[11] = _mm256_unpackhi_epi32(lstep1[37], lstep1[59]);
+ u[12] = _mm256_unpacklo_epi32(lstep1[38], lstep1[56]);
+ u[13] = _mm256_unpackhi_epi32(lstep1[38], lstep1[56]);
+ u[14] = _mm256_unpacklo_epi32(lstep1[39], lstep1[57]);
+ u[15] = _mm256_unpackhi_epi32(lstep1[39], lstep1[57]);
+
+ v[ 0] = k_madd_epi32_avx2(u[ 0], k32_p31_p01);
+ v[ 1] = k_madd_epi32_avx2(u[ 1], k32_p31_p01);
+ v[ 2] = k_madd_epi32_avx2(u[ 2], k32_p31_p01);
+ v[ 3] = k_madd_epi32_avx2(u[ 3], k32_p31_p01);
+ v[ 4] = k_madd_epi32_avx2(u[ 4], k32_p15_p17);
+ v[ 5] = k_madd_epi32_avx2(u[ 5], k32_p15_p17);
+ v[ 6] = k_madd_epi32_avx2(u[ 6], k32_p15_p17);
+ v[ 7] = k_madd_epi32_avx2(u[ 7], k32_p15_p17);
+ v[ 8] = k_madd_epi32_avx2(u[ 8], k32_p23_p09);
+ v[ 9] = k_madd_epi32_avx2(u[ 9], k32_p23_p09);
+ v[10] = k_madd_epi32_avx2(u[10], k32_p23_p09);
+ v[11] = k_madd_epi32_avx2(u[11], k32_p23_p09);
+ v[12] = k_madd_epi32_avx2(u[12], k32_p07_p25);
+ v[13] = k_madd_epi32_avx2(u[13], k32_p07_p25);
+ v[14] = k_madd_epi32_avx2(u[14], k32_p07_p25);
+ v[15] = k_madd_epi32_avx2(u[15], k32_p07_p25);
+ v[16] = k_madd_epi32_avx2(u[12], k32_m25_p07);
+ v[17] = k_madd_epi32_avx2(u[13], k32_m25_p07);
+ v[18] = k_madd_epi32_avx2(u[14], k32_m25_p07);
+ v[19] = k_madd_epi32_avx2(u[15], k32_m25_p07);
+ v[20] = k_madd_epi32_avx2(u[ 8], k32_m09_p23);
+ v[21] = k_madd_epi32_avx2(u[ 9], k32_m09_p23);
+ v[22] = k_madd_epi32_avx2(u[10], k32_m09_p23);
+ v[23] = k_madd_epi32_avx2(u[11], k32_m09_p23);
+ v[24] = k_madd_epi32_avx2(u[ 4], k32_m17_p15);
+ v[25] = k_madd_epi32_avx2(u[ 5], k32_m17_p15);
+ v[26] = k_madd_epi32_avx2(u[ 6], k32_m17_p15);
+ v[27] = k_madd_epi32_avx2(u[ 7], k32_m17_p15);
+ v[28] = k_madd_epi32_avx2(u[ 0], k32_m01_p31);
+ v[29] = k_madd_epi32_avx2(u[ 1], k32_m01_p31);
+ v[30] = k_madd_epi32_avx2(u[ 2], k32_m01_p31);
+ v[31] = k_madd_epi32_avx2(u[ 3], k32_m01_p31);
+
+ u[ 0] = k_packs_epi64_avx2(v[ 0], v[ 1]);
+ u[ 1] = k_packs_epi64_avx2(v[ 2], v[ 3]);
+ u[ 2] = k_packs_epi64_avx2(v[ 4], v[ 5]);
+ u[ 3] = k_packs_epi64_avx2(v[ 6], v[ 7]);
+ u[ 4] = k_packs_epi64_avx2(v[ 8], v[ 9]);
+ u[ 5] = k_packs_epi64_avx2(v[10], v[11]);
+ u[ 6] = k_packs_epi64_avx2(v[12], v[13]);
+ u[ 7] = k_packs_epi64_avx2(v[14], v[15]);
+ u[ 8] = k_packs_epi64_avx2(v[16], v[17]);
+ u[ 9] = k_packs_epi64_avx2(v[18], v[19]);
+ u[10] = k_packs_epi64_avx2(v[20], v[21]);
+ u[11] = k_packs_epi64_avx2(v[22], v[23]);
+ u[12] = k_packs_epi64_avx2(v[24], v[25]);
+ u[13] = k_packs_epi64_avx2(v[26], v[27]);
+ u[14] = k_packs_epi64_avx2(v[28], v[29]);
+ u[15] = k_packs_epi64_avx2(v[30], v[31]);
+
+ v[ 0] = _mm256_add_epi32(u[ 0], k__DCT_CONST_ROUNDING);
+ v[ 1] = _mm256_add_epi32(u[ 1], k__DCT_CONST_ROUNDING);
+ v[ 2] = _mm256_add_epi32(u[ 2], k__DCT_CONST_ROUNDING);
+ v[ 3] = _mm256_add_epi32(u[ 3], k__DCT_CONST_ROUNDING);
+ v[ 4] = _mm256_add_epi32(u[ 4], k__DCT_CONST_ROUNDING);
+ v[ 5] = _mm256_add_epi32(u[ 5], k__DCT_CONST_ROUNDING);
+ v[ 6] = _mm256_add_epi32(u[ 6], k__DCT_CONST_ROUNDING);
+ v[ 7] = _mm256_add_epi32(u[ 7], k__DCT_CONST_ROUNDING);
+ v[ 8] = _mm256_add_epi32(u[ 8], k__DCT_CONST_ROUNDING);
+ v[ 9] = _mm256_add_epi32(u[ 9], k__DCT_CONST_ROUNDING);
+ v[10] = _mm256_add_epi32(u[10], k__DCT_CONST_ROUNDING);
+ v[11] = _mm256_add_epi32(u[11], k__DCT_CONST_ROUNDING);
+ v[12] = _mm256_add_epi32(u[12], k__DCT_CONST_ROUNDING);
+ v[13] = _mm256_add_epi32(u[13], k__DCT_CONST_ROUNDING);
+ v[14] = _mm256_add_epi32(u[14], k__DCT_CONST_ROUNDING);
+ v[15] = _mm256_add_epi32(u[15], k__DCT_CONST_ROUNDING);
+
+ u[ 0] = _mm256_srai_epi32(v[ 0], DCT_CONST_BITS);
+ u[ 1] = _mm256_srai_epi32(v[ 1], DCT_CONST_BITS);
+ u[ 2] = _mm256_srai_epi32(v[ 2], DCT_CONST_BITS);
+ u[ 3] = _mm256_srai_epi32(v[ 3], DCT_CONST_BITS);
+ u[ 4] = _mm256_srai_epi32(v[ 4], DCT_CONST_BITS);
+ u[ 5] = _mm256_srai_epi32(v[ 5], DCT_CONST_BITS);
+ u[ 6] = _mm256_srai_epi32(v[ 6], DCT_CONST_BITS);
+ u[ 7] = _mm256_srai_epi32(v[ 7], DCT_CONST_BITS);
+ u[ 8] = _mm256_srai_epi32(v[ 8], DCT_CONST_BITS);
+ u[ 9] = _mm256_srai_epi32(v[ 9], DCT_CONST_BITS);
+ u[10] = _mm256_srai_epi32(v[10], DCT_CONST_BITS);
+ u[11] = _mm256_srai_epi32(v[11], DCT_CONST_BITS);
+ u[12] = _mm256_srai_epi32(v[12], DCT_CONST_BITS);
+ u[13] = _mm256_srai_epi32(v[13], DCT_CONST_BITS);
+ u[14] = _mm256_srai_epi32(v[14], DCT_CONST_BITS);
+ u[15] = _mm256_srai_epi32(v[15], DCT_CONST_BITS);
+
+ v[ 0] = _mm256_cmpgt_epi32(kZero,u[ 0]);
+ v[ 1] = _mm256_cmpgt_epi32(kZero,u[ 1]);
+ v[ 2] = _mm256_cmpgt_epi32(kZero,u[ 2]);
+ v[ 3] = _mm256_cmpgt_epi32(kZero,u[ 3]);
+ v[ 4] = _mm256_cmpgt_epi32(kZero,u[ 4]);
+ v[ 5] = _mm256_cmpgt_epi32(kZero,u[ 5]);
+ v[ 6] = _mm256_cmpgt_epi32(kZero,u[ 6]);
+ v[ 7] = _mm256_cmpgt_epi32(kZero,u[ 7]);
+ v[ 8] = _mm256_cmpgt_epi32(kZero,u[ 8]);
+ v[ 9] = _mm256_cmpgt_epi32(kZero,u[ 9]);
+ v[10] = _mm256_cmpgt_epi32(kZero,u[10]);
+ v[11] = _mm256_cmpgt_epi32(kZero,u[11]);
+ v[12] = _mm256_cmpgt_epi32(kZero,u[12]);
+ v[13] = _mm256_cmpgt_epi32(kZero,u[13]);
+ v[14] = _mm256_cmpgt_epi32(kZero,u[14]);
+ v[15] = _mm256_cmpgt_epi32(kZero,u[15]);
+
+ u[ 0] = _mm256_sub_epi32(u[ 0], v[ 0]);
+ u[ 1] = _mm256_sub_epi32(u[ 1], v[ 1]);
+ u[ 2] = _mm256_sub_epi32(u[ 2], v[ 2]);
+ u[ 3] = _mm256_sub_epi32(u[ 3], v[ 3]);
+ u[ 4] = _mm256_sub_epi32(u[ 4], v[ 4]);
+ u[ 5] = _mm256_sub_epi32(u[ 5], v[ 5]);
+ u[ 6] = _mm256_sub_epi32(u[ 6], v[ 6]);
+ u[ 7] = _mm256_sub_epi32(u[ 7], v[ 7]);
+ u[ 8] = _mm256_sub_epi32(u[ 8], v[ 8]);
+ u[ 9] = _mm256_sub_epi32(u[ 9], v[ 9]);
+ u[10] = _mm256_sub_epi32(u[10], v[10]);
+ u[11] = _mm256_sub_epi32(u[11], v[11]);
+ u[12] = _mm256_sub_epi32(u[12], v[12]);
+ u[13] = _mm256_sub_epi32(u[13], v[13]);
+ u[14] = _mm256_sub_epi32(u[14], v[14]);
+ u[15] = _mm256_sub_epi32(u[15], v[15]);
+
+ v[0] = _mm256_add_epi32(u[0], K32One);
+ v[1] = _mm256_add_epi32(u[1], K32One);
+ v[2] = _mm256_add_epi32(u[2], K32One);
+ v[3] = _mm256_add_epi32(u[3], K32One);
+ v[4] = _mm256_add_epi32(u[4], K32One);
+ v[5] = _mm256_add_epi32(u[5], K32One);
+ v[6] = _mm256_add_epi32(u[6], K32One);
+ v[7] = _mm256_add_epi32(u[7], K32One);
+ v[8] = _mm256_add_epi32(u[8], K32One);
+ v[9] = _mm256_add_epi32(u[9], K32One);
+ v[10] = _mm256_add_epi32(u[10], K32One);
+ v[11] = _mm256_add_epi32(u[11], K32One);
+ v[12] = _mm256_add_epi32(u[12], K32One);
+ v[13] = _mm256_add_epi32(u[13], K32One);
+ v[14] = _mm256_add_epi32(u[14], K32One);
+ v[15] = _mm256_add_epi32(u[15], K32One);
+
+ u[0] = _mm256_srai_epi32(v[0], 2);
+ u[1] = _mm256_srai_epi32(v[1], 2);
+ u[2] = _mm256_srai_epi32(v[2], 2);
+ u[3] = _mm256_srai_epi32(v[3], 2);
+ u[4] = _mm256_srai_epi32(v[4], 2);
+ u[5] = _mm256_srai_epi32(v[5], 2);
+ u[6] = _mm256_srai_epi32(v[6], 2);
+ u[7] = _mm256_srai_epi32(v[7], 2);
+ u[8] = _mm256_srai_epi32(v[8], 2);
+ u[9] = _mm256_srai_epi32(v[9], 2);
+ u[10] = _mm256_srai_epi32(v[10], 2);
+ u[11] = _mm256_srai_epi32(v[11], 2);
+ u[12] = _mm256_srai_epi32(v[12], 2);
+ u[13] = _mm256_srai_epi32(v[13], 2);
+ u[14] = _mm256_srai_epi32(v[14], 2);
+ u[15] = _mm256_srai_epi32(v[15], 2);
+
+ out[ 1] = _mm256_packs_epi32(u[0], u[1]);
+ out[17] = _mm256_packs_epi32(u[2], u[3]);
+ out[ 9] = _mm256_packs_epi32(u[4], u[5]);
+ out[25] = _mm256_packs_epi32(u[6], u[7]);
+ out[ 7] = _mm256_packs_epi32(u[8], u[9]);
+ out[23] = _mm256_packs_epi32(u[10], u[11]);
+ out[15] = _mm256_packs_epi32(u[12], u[13]);
+ out[31] = _mm256_packs_epi32(u[14], u[15]);
+ }
+ {+ const __m256i k32_p27_p05 = pair256_set_epi32(cospi_27_64, cospi_5_64);
+ const __m256i k32_p11_p21 = pair256_set_epi32(cospi_11_64, cospi_21_64);
+ const __m256i k32_p19_p13 = pair256_set_epi32(cospi_19_64, cospi_13_64);
+ const __m256i k32_p03_p29 = pair256_set_epi32(cospi_3_64, cospi_29_64);
+ const __m256i k32_m29_p03 = pair256_set_epi32(-cospi_29_64, cospi_3_64);
+ const __m256i k32_m13_p19 = pair256_set_epi32(-cospi_13_64, cospi_19_64);
+ const __m256i k32_m21_p11 = pair256_set_epi32(-cospi_21_64, cospi_11_64);
+ const __m256i k32_m05_p27 = pair256_set_epi32(-cospi_5_64, cospi_27_64);
+
+ u[ 0] = _mm256_unpacklo_epi32(lstep1[40], lstep1[54]);
+ u[ 1] = _mm256_unpackhi_epi32(lstep1[40], lstep1[54]);
+ u[ 2] = _mm256_unpacklo_epi32(lstep1[41], lstep1[55]);
+ u[ 3] = _mm256_unpackhi_epi32(lstep1[41], lstep1[55]);
+ u[ 4] = _mm256_unpacklo_epi32(lstep1[42], lstep1[52]);
+ u[ 5] = _mm256_unpackhi_epi32(lstep1[42], lstep1[52]);
+ u[ 6] = _mm256_unpacklo_epi32(lstep1[43], lstep1[53]);
+ u[ 7] = _mm256_unpackhi_epi32(lstep1[43], lstep1[53]);
+ u[ 8] = _mm256_unpacklo_epi32(lstep1[44], lstep1[50]);
+ u[ 9] = _mm256_unpackhi_epi32(lstep1[44], lstep1[50]);
+ u[10] = _mm256_unpacklo_epi32(lstep1[45], lstep1[51]);
+ u[11] = _mm256_unpackhi_epi32(lstep1[45], lstep1[51]);
+ u[12] = _mm256_unpacklo_epi32(lstep1[46], lstep1[48]);
+ u[13] = _mm256_unpackhi_epi32(lstep1[46], lstep1[48]);
+ u[14] = _mm256_unpacklo_epi32(lstep1[47], lstep1[49]);
+ u[15] = _mm256_unpackhi_epi32(lstep1[47], lstep1[49]);
+
+ v[ 0] = k_madd_epi32_avx2(u[ 0], k32_p27_p05);
+ v[ 1] = k_madd_epi32_avx2(u[ 1], k32_p27_p05);
+ v[ 2] = k_madd_epi32_avx2(u[ 2], k32_p27_p05);
+ v[ 3] = k_madd_epi32_avx2(u[ 3], k32_p27_p05);
+ v[ 4] = k_madd_epi32_avx2(u[ 4], k32_p11_p21);
+ v[ 5] = k_madd_epi32_avx2(u[ 5], k32_p11_p21);
+ v[ 6] = k_madd_epi32_avx2(u[ 6], k32_p11_p21);
+ v[ 7] = k_madd_epi32_avx2(u[ 7], k32_p11_p21);
+ v[ 8] = k_madd_epi32_avx2(u[ 8], k32_p19_p13);
+ v[ 9] = k_madd_epi32_avx2(u[ 9], k32_p19_p13);
+ v[10] = k_madd_epi32_avx2(u[10], k32_p19_p13);
+ v[11] = k_madd_epi32_avx2(u[11], k32_p19_p13);
+ v[12] = k_madd_epi32_avx2(u[12], k32_p03_p29);
+ v[13] = k_madd_epi32_avx2(u[13], k32_p03_p29);
+ v[14] = k_madd_epi32_avx2(u[14], k32_p03_p29);
+ v[15] = k_madd_epi32_avx2(u[15], k32_p03_p29);
+ v[16] = k_madd_epi32_avx2(u[12], k32_m29_p03);
+ v[17] = k_madd_epi32_avx2(u[13], k32_m29_p03);
+ v[18] = k_madd_epi32_avx2(u[14], k32_m29_p03);
+ v[19] = k_madd_epi32_avx2(u[15], k32_m29_p03);
+ v[20] = k_madd_epi32_avx2(u[ 8], k32_m13_p19);
+ v[21] = k_madd_epi32_avx2(u[ 9], k32_m13_p19);
+ v[22] = k_madd_epi32_avx2(u[10], k32_m13_p19);
+ v[23] = k_madd_epi32_avx2(u[11], k32_m13_p19);
+ v[24] = k_madd_epi32_avx2(u[ 4], k32_m21_p11);
+ v[25] = k_madd_epi32_avx2(u[ 5], k32_m21_p11);
+ v[26] = k_madd_epi32_avx2(u[ 6], k32_m21_p11);
+ v[27] = k_madd_epi32_avx2(u[ 7], k32_m21_p11);
+ v[28] = k_madd_epi32_avx2(u[ 0], k32_m05_p27);
+ v[29] = k_madd_epi32_avx2(u[ 1], k32_m05_p27);
+ v[30] = k_madd_epi32_avx2(u[ 2], k32_m05_p27);
+ v[31] = k_madd_epi32_avx2(u[ 3], k32_m05_p27);
+
+ u[ 0] = k_packs_epi64_avx2(v[ 0], v[ 1]);
+ u[ 1] = k_packs_epi64_avx2(v[ 2], v[ 3]);
+ u[ 2] = k_packs_epi64_avx2(v[ 4], v[ 5]);
+ u[ 3] = k_packs_epi64_avx2(v[ 6], v[ 7]);
+ u[ 4] = k_packs_epi64_avx2(v[ 8], v[ 9]);
+ u[ 5] = k_packs_epi64_avx2(v[10], v[11]);
+ u[ 6] = k_packs_epi64_avx2(v[12], v[13]);
+ u[ 7] = k_packs_epi64_avx2(v[14], v[15]);
+ u[ 8] = k_packs_epi64_avx2(v[16], v[17]);
+ u[ 9] = k_packs_epi64_avx2(v[18], v[19]);
+ u[10] = k_packs_epi64_avx2(v[20], v[21]);
+ u[11] = k_packs_epi64_avx2(v[22], v[23]);
+ u[12] = k_packs_epi64_avx2(v[24], v[25]);
+ u[13] = k_packs_epi64_avx2(v[26], v[27]);
+ u[14] = k_packs_epi64_avx2(v[28], v[29]);
+ u[15] = k_packs_epi64_avx2(v[30], v[31]);
+
+ v[ 0] = _mm256_add_epi32(u[ 0], k__DCT_CONST_ROUNDING);
+ v[ 1] = _mm256_add_epi32(u[ 1], k__DCT_CONST_ROUNDING);
+ v[ 2] = _mm256_add_epi32(u[ 2], k__DCT_CONST_ROUNDING);
+ v[ 3] = _mm256_add_epi32(u[ 3], k__DCT_CONST_ROUNDING);
+ v[ 4] = _mm256_add_epi32(u[ 4], k__DCT_CONST_ROUNDING);
+ v[ 5] = _mm256_add_epi32(u[ 5], k__DCT_CONST_ROUNDING);
+ v[ 6] = _mm256_add_epi32(u[ 6], k__DCT_CONST_ROUNDING);
+ v[ 7] = _mm256_add_epi32(u[ 7], k__DCT_CONST_ROUNDING);
+ v[ 8] = _mm256_add_epi32(u[ 8], k__DCT_CONST_ROUNDING);
+ v[ 9] = _mm256_add_epi32(u[ 9], k__DCT_CONST_ROUNDING);
+ v[10] = _mm256_add_epi32(u[10], k__DCT_CONST_ROUNDING);
+ v[11] = _mm256_add_epi32(u[11], k__DCT_CONST_ROUNDING);
+ v[12] = _mm256_add_epi32(u[12], k__DCT_CONST_ROUNDING);
+ v[13] = _mm256_add_epi32(u[13], k__DCT_CONST_ROUNDING);
+ v[14] = _mm256_add_epi32(u[14], k__DCT_CONST_ROUNDING);
+ v[15] = _mm256_add_epi32(u[15], k__DCT_CONST_ROUNDING);
+
+ u[ 0] = _mm256_srai_epi32(v[ 0], DCT_CONST_BITS);
+ u[ 1] = _mm256_srai_epi32(v[ 1], DCT_CONST_BITS);
+ u[ 2] = _mm256_srai_epi32(v[ 2], DCT_CONST_BITS);
+ u[ 3] = _mm256_srai_epi32(v[ 3], DCT_CONST_BITS);
+ u[ 4] = _mm256_srai_epi32(v[ 4], DCT_CONST_BITS);
+ u[ 5] = _mm256_srai_epi32(v[ 5], DCT_CONST_BITS);
+ u[ 6] = _mm256_srai_epi32(v[ 6], DCT_CONST_BITS);
+ u[ 7] = _mm256_srai_epi32(v[ 7], DCT_CONST_BITS);
+ u[ 8] = _mm256_srai_epi32(v[ 8], DCT_CONST_BITS);
+ u[ 9] = _mm256_srai_epi32(v[ 9], DCT_CONST_BITS);
+ u[10] = _mm256_srai_epi32(v[10], DCT_CONST_BITS);
+ u[11] = _mm256_srai_epi32(v[11], DCT_CONST_BITS);
+ u[12] = _mm256_srai_epi32(v[12], DCT_CONST_BITS);
+ u[13] = _mm256_srai_epi32(v[13], DCT_CONST_BITS);
+ u[14] = _mm256_srai_epi32(v[14], DCT_CONST_BITS);
+ u[15] = _mm256_srai_epi32(v[15], DCT_CONST_BITS);
+
+ v[ 0] = _mm256_cmpgt_epi32(kZero,u[ 0]);
+ v[ 1] = _mm256_cmpgt_epi32(kZero,u[ 1]);
+ v[ 2] = _mm256_cmpgt_epi32(kZero,u[ 2]);
+ v[ 3] = _mm256_cmpgt_epi32(kZero,u[ 3]);
+ v[ 4] = _mm256_cmpgt_epi32(kZero,u[ 4]);
+ v[ 5] = _mm256_cmpgt_epi32(kZero,u[ 5]);
+ v[ 6] = _mm256_cmpgt_epi32(kZero,u[ 6]);
+ v[ 7] = _mm256_cmpgt_epi32(kZero,u[ 7]);
+ v[ 8] = _mm256_cmpgt_epi32(kZero,u[ 8]);
+ v[ 9] = _mm256_cmpgt_epi32(kZero,u[ 9]);
+ v[10] = _mm256_cmpgt_epi32(kZero,u[10]);
+ v[11] = _mm256_cmpgt_epi32(kZero,u[11]);
+ v[12] = _mm256_cmpgt_epi32(kZero,u[12]);
+ v[13] = _mm256_cmpgt_epi32(kZero,u[13]);
+ v[14] = _mm256_cmpgt_epi32(kZero,u[14]);
+ v[15] = _mm256_cmpgt_epi32(kZero,u[15]);
+
+ u[ 0] = _mm256_sub_epi32(u[ 0], v[ 0]);
+ u[ 1] = _mm256_sub_epi32(u[ 1], v[ 1]);
+ u[ 2] = _mm256_sub_epi32(u[ 2], v[ 2]);
+ u[ 3] = _mm256_sub_epi32(u[ 3], v[ 3]);
+ u[ 4] = _mm256_sub_epi32(u[ 4], v[ 4]);
+ u[ 5] = _mm256_sub_epi32(u[ 5], v[ 5]);
+ u[ 6] = _mm256_sub_epi32(u[ 6], v[ 6]);
+ u[ 7] = _mm256_sub_epi32(u[ 7], v[ 7]);
+ u[ 8] = _mm256_sub_epi32(u[ 8], v[ 8]);
+ u[ 9] = _mm256_sub_epi32(u[ 9], v[ 9]);
+ u[10] = _mm256_sub_epi32(u[10], v[10]);
+ u[11] = _mm256_sub_epi32(u[11], v[11]);
+ u[12] = _mm256_sub_epi32(u[12], v[12]);
+ u[13] = _mm256_sub_epi32(u[13], v[13]);
+ u[14] = _mm256_sub_epi32(u[14], v[14]);
+ u[15] = _mm256_sub_epi32(u[15], v[15]);
+
+ v[0] = _mm256_add_epi32(u[0], K32One);
+ v[1] = _mm256_add_epi32(u[1], K32One);
+ v[2] = _mm256_add_epi32(u[2], K32One);
+ v[3] = _mm256_add_epi32(u[3], K32One);
+ v[4] = _mm256_add_epi32(u[4], K32One);
+ v[5] = _mm256_add_epi32(u[5], K32One);
+ v[6] = _mm256_add_epi32(u[6], K32One);
+ v[7] = _mm256_add_epi32(u[7], K32One);
+ v[8] = _mm256_add_epi32(u[8], K32One);
+ v[9] = _mm256_add_epi32(u[9], K32One);
+ v[10] = _mm256_add_epi32(u[10], K32One);
+ v[11] = _mm256_add_epi32(u[11], K32One);
+ v[12] = _mm256_add_epi32(u[12], K32One);
+ v[13] = _mm256_add_epi32(u[13], K32One);
+ v[14] = _mm256_add_epi32(u[14], K32One);
+ v[15] = _mm256_add_epi32(u[15], K32One);
+
+ u[0] = _mm256_srai_epi32(v[0], 2);
+ u[1] = _mm256_srai_epi32(v[1], 2);
+ u[2] = _mm256_srai_epi32(v[2], 2);
+ u[3] = _mm256_srai_epi32(v[3], 2);
+ u[4] = _mm256_srai_epi32(v[4], 2);
+ u[5] = _mm256_srai_epi32(v[5], 2);
+ u[6] = _mm256_srai_epi32(v[6], 2);
+ u[7] = _mm256_srai_epi32(v[7], 2);
+ u[8] = _mm256_srai_epi32(v[8], 2);
+ u[9] = _mm256_srai_epi32(v[9], 2);
+ u[10] = _mm256_srai_epi32(v[10], 2);
+ u[11] = _mm256_srai_epi32(v[11], 2);
+ u[12] = _mm256_srai_epi32(v[12], 2);
+ u[13] = _mm256_srai_epi32(v[13], 2);
+ u[14] = _mm256_srai_epi32(v[14], 2);
+ u[15] = _mm256_srai_epi32(v[15], 2);
+
+ out[ 5] = _mm256_packs_epi32(u[0], u[1]);
+ out[21] = _mm256_packs_epi32(u[2], u[3]);
+ out[13] = _mm256_packs_epi32(u[4], u[5]);
+ out[29] = _mm256_packs_epi32(u[6], u[7]);
+ out[ 3] = _mm256_packs_epi32(u[8], u[9]);
+ out[19] = _mm256_packs_epi32(u[10], u[11]);
+ out[11] = _mm256_packs_epi32(u[12], u[13]);
+ out[27] = _mm256_packs_epi32(u[14], u[15]);
+ }
+ }
+#endif
+ // Transpose the results, do it as four 8x8 transposes.
+ {+ int transpose_block;
+ int16_t *output_currStep,*output_nextStep;
+ if (0 == pass){+ output_currStep = &intermediate[column_start * 32];
+ output_nextStep = &intermediate[(column_start + 8) * 32];
+ } else{+ output_currStep = &output_org[column_start * 32];
+ output_nextStep = &output_org[(column_start + 8) * 32];
+ }
+ for (transpose_block = 0; transpose_block < 4; ++transpose_block) {+ __m256i *this_out = &out[8 * transpose_block];
+ // 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15
+ // 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35
+ // 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55
+ // 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75
+ // 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95
+ // 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115
+ // 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135
+ // 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155
+ const __m256i tr0_0 = _mm256_unpacklo_epi16(this_out[0], this_out[1]);
+ const __m256i tr0_1 = _mm256_unpacklo_epi16(this_out[2], this_out[3]);
+ const __m256i tr0_2 = _mm256_unpackhi_epi16(this_out[0], this_out[1]);
+ const __m256i tr0_3 = _mm256_unpackhi_epi16(this_out[2], this_out[3]);
+ const __m256i tr0_4 = _mm256_unpacklo_epi16(this_out[4], this_out[5]);
+ const __m256i tr0_5 = _mm256_unpacklo_epi16(this_out[6], this_out[7]);
+ const __m256i tr0_6 = _mm256_unpackhi_epi16(this_out[4], this_out[5]);
+ const __m256i tr0_7 = _mm256_unpackhi_epi16(this_out[6], this_out[7]);
+ // 00 20 01 21 02 22 03 23 08 28 09 29 10 30 11 31
+ // 40 60 41 61 42 62 43 63 48 68 49 69 50 70 51 71
+ // 04 24 05 25 06 26 07 27 12 32 13 33 14 34 15 35
+ // 44 64 45 65 46 66 47 67 52 72 53 73 54 74 55 75
+ // 80 100 81 101 82 102 83 103 88 108 89 109 90 110 91 101
+ // 120 140 121 141 122 142 123 143 128 148 129 149 130 150 131 151
+ // 84 104 85 105 86 106 87 107 92 112 93 113 94 114 95 115
+ // 124 144 125 145 126 146 127 147 132 152 133 153 134 154 135 155
+
+ const __m256i tr1_0 = _mm256_unpacklo_epi32(tr0_0, tr0_1);
+ const __m256i tr1_1 = _mm256_unpacklo_epi32(tr0_2, tr0_3);
+ const __m256i tr1_2 = _mm256_unpackhi_epi32(tr0_0, tr0_1);
+ const __m256i tr1_3 = _mm256_unpackhi_epi32(tr0_2, tr0_3);
+ const __m256i tr1_4 = _mm256_unpacklo_epi32(tr0_4, tr0_5);
+ const __m256i tr1_5 = _mm256_unpacklo_epi32(tr0_6, tr0_7);
+ const __m256i tr1_6 = _mm256_unpackhi_epi32(tr0_4, tr0_5);
+ const __m256i tr1_7 = _mm256_unpackhi_epi32(tr0_6, tr0_7);
+ // 00 20 40 60 01 21 41 61 08 28 48 68 09 29 49 69
+ // 04 24 44 64 05 25 45 65 12 32 52 72 13 33 53 73
+ // 02 22 42 62 03 23 43 63 10 30 50 70 11 31 51 71
+ // 06 26 46 66 07 27 47 67 14 34 54 74 15 35 55 75
+ // 80 100 120 140 81 101 121 141 88 108 128 148 89 109 129 149
+ // 84 104 124 144 85 105 125 145 92 112 132 152 93 113 133 153
+ // 82 102 122 142 83 103 123 143 90 110 130 150 91 101 131 151
+ // 86 106 126 146 87 107 127 147 94 114 134 154 95 115 135 155
+ __m256i tr2_0 = _mm256_unpacklo_epi64(tr1_0, tr1_4);
+ __m256i tr2_1 = _mm256_unpackhi_epi64(tr1_0, tr1_4);
+ __m256i tr2_2 = _mm256_unpacklo_epi64(tr1_2, tr1_6);
+ __m256i tr2_3 = _mm256_unpackhi_epi64(tr1_2, tr1_6);
+ __m256i tr2_4 = _mm256_unpacklo_epi64(tr1_1, tr1_5);
+ __m256i tr2_5 = _mm256_unpackhi_epi64(tr1_1, tr1_5);
+ __m256i tr2_6 = _mm256_unpacklo_epi64(tr1_3, tr1_7);
+ __m256i tr2_7 = _mm256_unpackhi_epi64(tr1_3, tr1_7);
+ // 00 20 40 60 80 100 120 140 08 28 48 68 88 108 128 148
+ // 01 21 41 61 81 101 121 141 09 29 49 69 89 109 129 149
+ // 02 22 42 62 82 102 122 142 10 30 50 70 90 110 130 150
+ // 03 23 43 63 83 103 123 143 11 31 51 71 91 101 131 151
+ // 04 24 44 64 84 104 124 144 12 32 52 72 92 112 132 152
+ // 05 25 45 65 85 105 125 145 13 33 53 73 93 113 133 153
+ // 06 26 46 66 86 106 126 146 14 34 54 74 94 114 134 154
+ // 07 27 47 67 87 107 127 147 15 35 55 75 95 115 135 155
+ if (0 == pass) {+ // output[j] = (output[j] + 1 + (output[j] > 0)) >> 2;
+ // TODO(cd): see quality impact of only doing
+ // output[j] = (output[j] + 1) >> 2;
+ // which would remove the code between here ...
+ __m256i tr2_0_0 = _mm256_cmpgt_epi16(tr2_0, kZero);
+ __m256i tr2_1_0 = _mm256_cmpgt_epi16(tr2_1, kZero);
+ __m256i tr2_2_0 = _mm256_cmpgt_epi16(tr2_2, kZero);
+ __m256i tr2_3_0 = _mm256_cmpgt_epi16(tr2_3, kZero);
+ __m256i tr2_4_0 = _mm256_cmpgt_epi16(tr2_4, kZero);
+ __m256i tr2_5_0 = _mm256_cmpgt_epi16(tr2_5, kZero);
+ __m256i tr2_6_0 = _mm256_cmpgt_epi16(tr2_6, kZero);
+ __m256i tr2_7_0 = _mm256_cmpgt_epi16(tr2_7, kZero);
+ tr2_0 = _mm256_sub_epi16(tr2_0, tr2_0_0);
+ tr2_1 = _mm256_sub_epi16(tr2_1, tr2_1_0);
+ tr2_2 = _mm256_sub_epi16(tr2_2, tr2_2_0);
+ tr2_3 = _mm256_sub_epi16(tr2_3, tr2_3_0);
+ tr2_4 = _mm256_sub_epi16(tr2_4, tr2_4_0);
+ tr2_5 = _mm256_sub_epi16(tr2_5, tr2_5_0);
+ tr2_6 = _mm256_sub_epi16(tr2_6, tr2_6_0);
+ tr2_7 = _mm256_sub_epi16(tr2_7, tr2_7_0);
+ // ... and here.
+ // PS: also change code in vp9/encoder/vp9_dct.c
+ tr2_0 = _mm256_add_epi16(tr2_0, kOne);
+ tr2_1 = _mm256_add_epi16(tr2_1, kOne);
+ tr2_2 = _mm256_add_epi16(tr2_2, kOne);
+ tr2_3 = _mm256_add_epi16(tr2_3, kOne);
+ tr2_4 = _mm256_add_epi16(tr2_4, kOne);
+ tr2_5 = _mm256_add_epi16(tr2_5, kOne);
+ tr2_6 = _mm256_add_epi16(tr2_6, kOne);
+ tr2_7 = _mm256_add_epi16(tr2_7, kOne);
+ tr2_0 = _mm256_srai_epi16(tr2_0, 2);
+ tr2_1 = _mm256_srai_epi16(tr2_1, 2);
+ tr2_2 = _mm256_srai_epi16(tr2_2, 2);
+ tr2_3 = _mm256_srai_epi16(tr2_3, 2);
+ tr2_4 = _mm256_srai_epi16(tr2_4, 2);
+ tr2_5 = _mm256_srai_epi16(tr2_5, 2);
+ tr2_6 = _mm256_srai_epi16(tr2_6, 2);
+ tr2_7 = _mm256_srai_epi16(tr2_7, 2);
+ }
+ // Note: even though all these stores are aligned, using the aligned
+ // intrinsic make the code slightly slower.
+ _mm_storeu_si128((__m128i *)(output_currStep + 0 * 32), _mm256_castsi256_si128(tr2_0));
+ _mm_storeu_si128((__m128i *)(output_currStep + 1 * 32), _mm256_castsi256_si128(tr2_1));
+ _mm_storeu_si128((__m128i *)(output_currStep + 2 * 32), _mm256_castsi256_si128(tr2_2));
+ _mm_storeu_si128((__m128i *)(output_currStep + 3 * 32), _mm256_castsi256_si128(tr2_3));
+ _mm_storeu_si128((__m128i *)(output_currStep + 4 * 32), _mm256_castsi256_si128(tr2_4));
+ _mm_storeu_si128((__m128i *)(output_currStep + 5 * 32), _mm256_castsi256_si128(tr2_5));
+ _mm_storeu_si128((__m128i *)(output_currStep + 6 * 32), _mm256_castsi256_si128(tr2_6));
+ _mm_storeu_si128((__m128i *)(output_currStep + 7 * 32), _mm256_castsi256_si128(tr2_7));
+
+ _mm_storeu_si128((__m128i *)(output_nextStep + 0 * 32), _mm256_extractf128_si256(tr2_0,1));
+ _mm_storeu_si128((__m128i *)(output_nextStep + 1 * 32), _mm256_extractf128_si256(tr2_1,1));
+ _mm_storeu_si128((__m128i *)(output_nextStep + 2 * 32), _mm256_extractf128_si256(tr2_2,1));
+ _mm_storeu_si128((__m128i *)(output_nextStep + 3 * 32), _mm256_extractf128_si256(tr2_3,1));
+ _mm_storeu_si128((__m128i *)(output_nextStep + 4 * 32), _mm256_extractf128_si256(tr2_4,1));
+ _mm_storeu_si128((__m128i *)(output_nextStep + 5 * 32), _mm256_extractf128_si256(tr2_5,1));
+ _mm_storeu_si128((__m128i *)(output_nextStep + 6 * 32), _mm256_extractf128_si256(tr2_6,1));
+ _mm_storeu_si128((__m128i *)(output_nextStep + 7 * 32), _mm256_extractf128_si256(tr2_7,1));
+ // Process next 8x8
+ output_currStep += 8;
+ output_nextStep += 8;
+ }
+ }
+ }
+ }
+} // NOLINT
--- /dev/null
+++ b/vp9/encoder/x86/vp9_dct_avx2.c
@@ -1,0 +1,2579 @@
+/*
+ * Copyright (c) 2012 The WebM project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include <immintrin.h> // AVX2
+#include "vp9/common/vp9_idct.h" // for cospi constants
+#include "vpx_ports/mem.h"
+
+void vp9_fdct4x4_avx2(const int16_t *input, int16_t *output, int stride) {+ // The 2D transform is done with two passes which are actually pretty
+ // similar. In the first one, we transform the columns and transpose
+ // the results. In the second one, we transform the rows. To achieve that,
+ // as the first pass results are transposed, we tranpose the columns (that
+ // is the transposed rows) and transpose the results (so that it goes back
+ // in normal/row positions).
+ int pass;
+ // Constants
+ // When we use them, in one case, they are all the same. In all others
+ // it's a pair of them that we need to repeat four times. This is done
+ // by constructing the 32 bit constant corresponding to that pair.
+ const __m128i k__cospi_p16_p16 = _mm_set1_epi16(cospi_16_64);
+ const __m128i k__cospi_p16_m16 = pair_set_epi16(cospi_16_64, -cospi_16_64);
+ const __m128i k__cospi_p24_p08 = pair_set_epi16(cospi_24_64, cospi_8_64);
+ const __m128i k__cospi_m08_p24 = pair_set_epi16(-cospi_8_64, cospi_24_64);
+ const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);
+ const __m128i k__nonzero_bias_a = _mm_setr_epi16(0, 1, 1, 1, 1, 1, 1, 1);
+ const __m128i k__nonzero_bias_b = _mm_setr_epi16(1, 0, 0, 0, 0, 0, 0, 0);
+ const __m128i kOne = _mm_set1_epi16(1);
+ __m128i in0, in1, in2, in3;
+ // Load inputs.
+ {+ in0 = _mm_loadl_epi64((const __m128i *)(input + 0 * stride));
+ in1 = _mm_loadl_epi64((const __m128i *)(input + 1 * stride));
+ in2 = _mm_loadl_epi64((const __m128i *)(input + 2 * stride));
+ in3 = _mm_loadl_epi64((const __m128i *)(input + 3 * stride));
+ // x = x << 4
+ in0 = _mm_slli_epi16(in0, 4);
+ in1 = _mm_slli_epi16(in1, 4);
+ in2 = _mm_slli_epi16(in2, 4);
+ in3 = _mm_slli_epi16(in3, 4);
+ // if (i == 0 && input[0]) input[0] += 1;
+ {+ // The mask will only contain wether the first value is zero, all
+ // other comparison will fail as something shifted by 4 (above << 4)
+ // can never be equal to one. To increment in the non-zero case, we
+ // add the mask and one for the first element:
+ // - if zero, mask = -1, v = v - 1 + 1 = v
+ // - if non-zero, mask = 0, v = v + 0 + 1 = v + 1
+ __m128i mask = _mm_cmpeq_epi16(in0, k__nonzero_bias_a);
+ in0 = _mm_add_epi16(in0, mask);
+ in0 = _mm_add_epi16(in0, k__nonzero_bias_b);
+ }
+ }
+ // Do the two transform/transpose passes
+ for (pass = 0; pass < 2; ++pass) {+ // Transform 1/2: Add/substract
+ const __m128i r0 = _mm_add_epi16(in0, in3);
+ const __m128i r1 = _mm_add_epi16(in1, in2);
+ const __m128i r2 = _mm_sub_epi16(in1, in2);
+ const __m128i r3 = _mm_sub_epi16(in0, in3);
+ // Transform 1/2: Interleave to do the multiply by constants which gets us
+ // into 32 bits.
+ const __m128i t0 = _mm_unpacklo_epi16(r0, r1);
+ const __m128i t2 = _mm_unpacklo_epi16(r2, r3);
+ const __m128i u0 = _mm_madd_epi16(t0, k__cospi_p16_p16);
+ const __m128i u2 = _mm_madd_epi16(t0, k__cospi_p16_m16);
+ const __m128i u4 = _mm_madd_epi16(t2, k__cospi_p24_p08);
+ const __m128i u6 = _mm_madd_epi16(t2, k__cospi_m08_p24);
+ const __m128i v0 = _mm_add_epi32(u0, k__DCT_CONST_ROUNDING);
+ const __m128i v2 = _mm_add_epi32(u2, k__DCT_CONST_ROUNDING);
+ const __m128i v4 = _mm_add_epi32(u4, k__DCT_CONST_ROUNDING);
+ const __m128i v6 = _mm_add_epi32(u6, k__DCT_CONST_ROUNDING);
+ const __m128i w0 = _mm_srai_epi32(v0, DCT_CONST_BITS);
+ const __m128i w2 = _mm_srai_epi32(v2, DCT_CONST_BITS);
+ const __m128i w4 = _mm_srai_epi32(v4, DCT_CONST_BITS);
+ const __m128i w6 = _mm_srai_epi32(v6, DCT_CONST_BITS);
+ // Combine and transpose
+ const __m128i res0 = _mm_packs_epi32(w0, w2);
+ const __m128i res1 = _mm_packs_epi32(w4, w6);
+ // 00 01 02 03 20 21 22 23
+ // 10 11 12 13 30 31 32 33
+ const __m128i tr0_0 = _mm_unpacklo_epi16(res0, res1);
+ const __m128i tr0_1 = _mm_unpackhi_epi16(res0, res1);
+ // 00 10 01 11 02 12 03 13
+ // 20 30 21 31 22 32 23 33
+ in0 = _mm_unpacklo_epi32(tr0_0, tr0_1);
+ in2 = _mm_unpackhi_epi32(tr0_0, tr0_1);
+ // 00 10 20 30 01 11 21 31 in0 contains 0 followed by 1
+ // 02 12 22 32 03 13 23 33 in2 contains 2 followed by 3
+ if (0 == pass) {+ // Extract values in the high part for second pass as transform code
+ // only uses the first four values.
+ in1 = _mm_unpackhi_epi64(in0, in0);
+ in3 = _mm_unpackhi_epi64(in2, in2);
+ } else {+ // Post-condition output and store it (v + 1) >> 2, taking advantage
+ // of the fact 1/3 are stored just after 0/2.
+ __m128i out01 = _mm_add_epi16(in0, kOne);
+ __m128i out23 = _mm_add_epi16(in2, kOne);
+ out01 = _mm_srai_epi16(out01, 2);
+ out23 = _mm_srai_epi16(out23, 2);
+ _mm_storeu_si128((__m128i *)(output + 0 * 4), out01);
+ _mm_storeu_si128((__m128i *)(output + 2 * 4), out23);
+ }
+ }
+}
+
+static INLINE void load_buffer_4x4_avx2(const int16_t *input, __m128i *in,
+ int stride) {+ const __m128i k__nonzero_bias_a = _mm_setr_epi16(0, 1, 1, 1, 1, 1, 1, 1);
+ const __m128i k__nonzero_bias_b = _mm_setr_epi16(1, 0, 0, 0, 0, 0, 0, 0);
+ __m128i mask;
+
+ in[0] = _mm_loadl_epi64((const __m128i *)(input + 0 * stride));
+ in[1] = _mm_loadl_epi64((const __m128i *)(input + 1 * stride));
+ in[2] = _mm_loadl_epi64((const __m128i *)(input + 2 * stride));
+ in[3] = _mm_loadl_epi64((const __m128i *)(input + 3 * stride));
+
+ in[0] = _mm_slli_epi16(in[0], 4);
+ in[1] = _mm_slli_epi16(in[1], 4);
+ in[2] = _mm_slli_epi16(in[2], 4);
+ in[3] = _mm_slli_epi16(in[3], 4);
+
+ mask = _mm_cmpeq_epi16(in[0], k__nonzero_bias_a);
+ in[0] = _mm_add_epi16(in[0], mask);
+ in[0] = _mm_add_epi16(in[0], k__nonzero_bias_b);
+}
+
+static INLINE void write_buffer_4x4_avx2(int16_t *output, __m128i *res) {+ const __m128i kOne = _mm_set1_epi16(1);
+ __m128i in01 = _mm_unpacklo_epi64(res[0], res[1]);
+ __m128i in23 = _mm_unpacklo_epi64(res[2], res[3]);
+ __m128i out01 = _mm_add_epi16(in01, kOne);
+ __m128i out23 = _mm_add_epi16(in23, kOne);
+ out01 = _mm_srai_epi16(out01, 2);
+ out23 = _mm_srai_epi16(out23, 2);
+ _mm_store_si128((__m128i *)(output + 0 * 8), out01);
+ _mm_store_si128((__m128i *)(output + 1 * 8), out23);
+}
+
+static INLINE void transpose_4x4_avx2(__m128i *res) {+ // Combine and transpose
+ // 00 01 02 03 20 21 22 23
+ // 10 11 12 13 30 31 32 33
+ const __m128i tr0_0 = _mm_unpacklo_epi16(res[0], res[1]);
+ const __m128i tr0_1 = _mm_unpackhi_epi16(res[0], res[1]);
+
+ // 00 10 01 11 02 12 03 13
+ // 20 30 21 31 22 32 23 33
+ res[0] = _mm_unpacklo_epi32(tr0_0, tr0_1);
+ res[2] = _mm_unpackhi_epi32(tr0_0, tr0_1);
+
+ // 00 10 20 30 01 11 21 31
+ // 02 12 22 32 03 13 23 33
+ // only use the first 4 16-bit integers
+ res[1] = _mm_unpackhi_epi64(res[0], res[0]);
+ res[3] = _mm_unpackhi_epi64(res[2], res[2]);
+}
+
+void fdct4_1d_avx2(__m128i *in) {+ const __m128i k__cospi_p16_p16 = _mm_set1_epi16(cospi_16_64);
+ const __m128i k__cospi_p16_m16 = pair_set_epi16(cospi_16_64, -cospi_16_64);
+ const __m128i k__cospi_p08_p24 = pair_set_epi16(cospi_8_64, cospi_24_64);
+ const __m128i k__cospi_p24_m08 = pair_set_epi16(cospi_24_64, -cospi_8_64);
+ const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);
+
+ __m128i u[4], v[4];
+ u[0]=_mm_unpacklo_epi16(in[0], in[1]);
+ u[1]=_mm_unpacklo_epi16(in[3], in[2]);
+
+ v[0] = _mm_add_epi16(u[0], u[1]);
+ v[1] = _mm_sub_epi16(u[0], u[1]);
+
+ u[0] = _mm_madd_epi16(v[0], k__cospi_p16_p16); // 0
+ u[1] = _mm_madd_epi16(v[0], k__cospi_p16_m16); // 2
+ u[2] = _mm_madd_epi16(v[1], k__cospi_p08_p24); // 1
+ u[3] = _mm_madd_epi16(v[1], k__cospi_p24_m08); // 3
+
+ v[0] = _mm_add_epi32(u[0], k__DCT_CONST_ROUNDING);
+ v[1] = _mm_add_epi32(u[1], k__DCT_CONST_ROUNDING);
+ v[2] = _mm_add_epi32(u[2], k__DCT_CONST_ROUNDING);
+ v[3] = _mm_add_epi32(u[3], k__DCT_CONST_ROUNDING);
+ u[0] = _mm_srai_epi32(v[0], DCT_CONST_BITS);
+ u[1] = _mm_srai_epi32(v[1], DCT_CONST_BITS);
+ u[2] = _mm_srai_epi32(v[2], DCT_CONST_BITS);
+ u[3] = _mm_srai_epi32(v[3], DCT_CONST_BITS);
+
+ in[0] = _mm_packs_epi32(u[0], u[1]);
+ in[1] = _mm_packs_epi32(u[2], u[3]);
+ transpose_4x4_avx2(in);
+}
+
+void fadst4_1d_avx2(__m128i *in) {+ const __m128i k__sinpi_p01_p02 = pair_set_epi16(sinpi_1_9, sinpi_2_9);
+ const __m128i k__sinpi_p04_m01 = pair_set_epi16(sinpi_4_9, -sinpi_1_9);
+ const __m128i k__sinpi_p03_p04 = pair_set_epi16(sinpi_3_9, sinpi_4_9);
+ const __m128i k__sinpi_m03_p02 = pair_set_epi16(-sinpi_3_9, sinpi_2_9);
+ const __m128i k__sinpi_p03_p03 = _mm_set1_epi16(sinpi_3_9);
+ const __m128i kZero = _mm_set1_epi16(0);
+ const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);
+ __m128i u[8], v[8];
+ __m128i in7 = _mm_add_epi16(in[0], in[1]);
+
+ u[0] = _mm_unpacklo_epi16(in[0], in[1]);
+ u[1] = _mm_unpacklo_epi16(in[2], in[3]);
+ u[2] = _mm_unpacklo_epi16(in7, kZero);
+ u[3] = _mm_unpacklo_epi16(in[2], kZero);
+ u[4] = _mm_unpacklo_epi16(in[3], kZero);
+
+ v[0] = _mm_madd_epi16(u[0], k__sinpi_p01_p02); // s0 + s2
+ v[1] = _mm_madd_epi16(u[1], k__sinpi_p03_p04); // s4 + s5
+ v[2] = _mm_madd_epi16(u[2], k__sinpi_p03_p03); // x1
+ v[3] = _mm_madd_epi16(u[0], k__sinpi_p04_m01); // s1 - s3
+ v[4] = _mm_madd_epi16(u[1], k__sinpi_m03_p02); // -s4 + s6
+ v[5] = _mm_madd_epi16(u[3], k__sinpi_p03_p03); // s4
+ v[6] = _mm_madd_epi16(u[4], k__sinpi_p03_p03);
+
+ u[0] = _mm_add_epi32(v[0], v[1]);
+ u[1] = _mm_sub_epi32(v[2], v[6]);
+ u[2] = _mm_add_epi32(v[3], v[4]);
+ u[3] = _mm_sub_epi32(u[2], u[0]);
+ u[4] = _mm_slli_epi32(v[5], 2);
+ u[5] = _mm_sub_epi32(u[4], v[5]);
+ u[6] = _mm_add_epi32(u[3], u[5]);
+
+ v[0] = _mm_add_epi32(u[0], k__DCT_CONST_ROUNDING);
+ v[1] = _mm_add_epi32(u[1], k__DCT_CONST_ROUNDING);
+ v[2] = _mm_add_epi32(u[2], k__DCT_CONST_ROUNDING);
+ v[3] = _mm_add_epi32(u[6], k__DCT_CONST_ROUNDING);
+
+ u[0] = _mm_srai_epi32(v[0], DCT_CONST_BITS);
+ u[1] = _mm_srai_epi32(v[1], DCT_CONST_BITS);
+ u[2] = _mm_srai_epi32(v[2], DCT_CONST_BITS);
+ u[3] = _mm_srai_epi32(v[3], DCT_CONST_BITS);
+
+ in[0] = _mm_packs_epi32(u[0], u[2]);
+ in[1] = _mm_packs_epi32(u[1], u[3]);
+ transpose_4x4_avx2(in);
+}
+
+void vp9_short_fht4x4_avx2(const int16_t *input, int16_t *output,
+ int stride, int tx_type) {+ __m128i in[4];
+ load_buffer_4x4_avx2(input, in, stride);
+ switch (tx_type) {+ case 0: // DCT_DCT
+ fdct4_1d_avx2(in);
+ fdct4_1d_avx2(in);
+ break;
+ case 1: // ADST_DCT
+ fadst4_1d_avx2(in);
+ fdct4_1d_avx2(in);
+ break;
+ case 2: // DCT_ADST
+ fdct4_1d_avx2(in);
+ fadst4_1d_avx2(in);
+ break;
+ case 3: // ADST_ADST
+ fadst4_1d_avx2(in);
+ fadst4_1d_avx2(in);
+ break;
+ default:
+ assert(0);
+ break;
+ }
+ write_buffer_4x4_avx2(output, in);
+}
+
+void vp9_fdct8x8_avx2(const int16_t *input, int16_t *output, int stride) {+ int pass;
+ // Constants
+ // When we use them, in one case, they are all the same. In all others
+ // it's a pair of them that we need to repeat four times. This is done
+ // by constructing the 32 bit constant corresponding to that pair.
+ const __m128i k__cospi_p16_p16 = _mm_set1_epi16(cospi_16_64);
+ const __m128i k__cospi_p16_m16 = pair_set_epi16(cospi_16_64, -cospi_16_64);
+ const __m128i k__cospi_p24_p08 = pair_set_epi16(cospi_24_64, cospi_8_64);
+ const __m128i k__cospi_m08_p24 = pair_set_epi16(-cospi_8_64, cospi_24_64);
+ const __m128i k__cospi_p28_p04 = pair_set_epi16(cospi_28_64, cospi_4_64);
+ const __m128i k__cospi_m04_p28 = pair_set_epi16(-cospi_4_64, cospi_28_64);
+ const __m128i k__cospi_p12_p20 = pair_set_epi16(cospi_12_64, cospi_20_64);
+ const __m128i k__cospi_m20_p12 = pair_set_epi16(-cospi_20_64, cospi_12_64);
+ const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);
+ // Load input
+ __m128i in0 = _mm_load_si128((const __m128i *)(input + 0 * stride));
+ __m128i in1 = _mm_load_si128((const __m128i *)(input + 1 * stride));
+ __m128i in2 = _mm_load_si128((const __m128i *)(input + 2 * stride));
+ __m128i in3 = _mm_load_si128((const __m128i *)(input + 3 * stride));
+ __m128i in4 = _mm_load_si128((const __m128i *)(input + 4 * stride));
+ __m128i in5 = _mm_load_si128((const __m128i *)(input + 5 * stride));
+ __m128i in6 = _mm_load_si128((const __m128i *)(input + 6 * stride));
+ __m128i in7 = _mm_load_si128((const __m128i *)(input + 7 * stride));
+ // Pre-condition input (shift by two)
+ in0 = _mm_slli_epi16(in0, 2);
+ in1 = _mm_slli_epi16(in1, 2);
+ in2 = _mm_slli_epi16(in2, 2);
+ in3 = _mm_slli_epi16(in3, 2);
+ in4 = _mm_slli_epi16(in4, 2);
+ in5 = _mm_slli_epi16(in5, 2);
+ in6 = _mm_slli_epi16(in6, 2);
+ in7 = _mm_slli_epi16(in7, 2);
+
+ // We do two passes, first the columns, then the rows. The results of the
+ // first pass are transposed so that the same column code can be reused. The
+ // results of the second pass are also transposed so that the rows (processed
+ // as columns) are put back in row positions.
+ for (pass = 0; pass < 2; pass++) {+ // To store results of each pass before the transpose.
+ __m128i res0, res1, res2, res3, res4, res5, res6, res7;
+ // Add/substract
+ const __m128i q0 = _mm_add_epi16(in0, in7);
+ const __m128i q1 = _mm_add_epi16(in1, in6);
+ const __m128i q2 = _mm_add_epi16(in2, in5);
+ const __m128i q3 = _mm_add_epi16(in3, in4);
+ const __m128i q4 = _mm_sub_epi16(in3, in4);
+ const __m128i q5 = _mm_sub_epi16(in2, in5);
+ const __m128i q6 = _mm_sub_epi16(in1, in6);
+ const __m128i q7 = _mm_sub_epi16(in0, in7);
+ // Work on first four results
+ {+ // Add/substract
+ const __m128i r0 = _mm_add_epi16(q0, q3);
+ const __m128i r1 = _mm_add_epi16(q1, q2);
+ const __m128i r2 = _mm_sub_epi16(q1, q2);
+ const __m128i r3 = _mm_sub_epi16(q0, q3);
+ // Interleave to do the multiply by constants which gets us into 32bits
+ const __m128i t0 = _mm_unpacklo_epi16(r0, r1);
+ const __m128i t1 = _mm_unpackhi_epi16(r0, r1);
+ const __m128i t2 = _mm_unpacklo_epi16(r2, r3);
+ const __m128i t3 = _mm_unpackhi_epi16(r2, r3);
+ const __m128i u0 = _mm_madd_epi16(t0, k__cospi_p16_p16);
+ const __m128i u1 = _mm_madd_epi16(t1, k__cospi_p16_p16);
+ const __m128i u2 = _mm_madd_epi16(t0, k__cospi_p16_m16);
+ const __m128i u3 = _mm_madd_epi16(t1, k__cospi_p16_m16);
+ const __m128i u4 = _mm_madd_epi16(t2, k__cospi_p24_p08);
+ const __m128i u5 = _mm_madd_epi16(t3, k__cospi_p24_p08);
+ const __m128i u6 = _mm_madd_epi16(t2, k__cospi_m08_p24);
+ const __m128i u7 = _mm_madd_epi16(t3, k__cospi_m08_p24);
+ // dct_const_round_shift
+ const __m128i v0 = _mm_add_epi32(u0, k__DCT_CONST_ROUNDING);
+ const __m128i v1 = _mm_add_epi32(u1, k__DCT_CONST_ROUNDING);
+ const __m128i v2 = _mm_add_epi32(u2, k__DCT_CONST_ROUNDING);
+ const __m128i v3 = _mm_add_epi32(u3, k__DCT_CONST_ROUNDING);
+ const __m128i v4 = _mm_add_epi32(u4, k__DCT_CONST_ROUNDING);
+ const __m128i v5 = _mm_add_epi32(u5, k__DCT_CONST_ROUNDING);
+ const __m128i v6 = _mm_add_epi32(u6, k__DCT_CONST_ROUNDING);
+ const __m128i v7 = _mm_add_epi32(u7, k__DCT_CONST_ROUNDING);
+ const __m128i w0 = _mm_srai_epi32(v0, DCT_CONST_BITS);
+ const __m128i w1 = _mm_srai_epi32(v1, DCT_CONST_BITS);
+ const __m128i w2 = _mm_srai_epi32(v2, DCT_CONST_BITS);
+ const __m128i w3 = _mm_srai_epi32(v3, DCT_CONST_BITS);
+ const __m128i w4 = _mm_srai_epi32(v4, DCT_CONST_BITS);
+ const __m128i w5 = _mm_srai_epi32(v5, DCT_CONST_BITS);
+ const __m128i w6 = _mm_srai_epi32(v6, DCT_CONST_BITS);
+ const __m128i w7 = _mm_srai_epi32(v7, DCT_CONST_BITS);
+ // Combine
+ res0 = _mm_packs_epi32(w0, w1);
+ res4 = _mm_packs_epi32(w2, w3);
+ res2 = _mm_packs_epi32(w4, w5);
+ res6 = _mm_packs_epi32(w6, w7);
+ }
+ // Work on next four results
+ {+ // Interleave to do the multiply by constants which gets us into 32bits
+ const __m128i d0 = _mm_unpacklo_epi16(q6, q5);
+ const __m128i d1 = _mm_unpackhi_epi16(q6, q5);
+ const __m128i e0 = _mm_madd_epi16(d0, k__cospi_p16_m16);
+ const __m128i e1 = _mm_madd_epi16(d1, k__cospi_p16_m16);
+ const __m128i e2 = _mm_madd_epi16(d0, k__cospi_p16_p16);
+ const __m128i e3 = _mm_madd_epi16(d1, k__cospi_p16_p16);
+ // dct_const_round_shift
+ const __m128i f0 = _mm_add_epi32(e0, k__DCT_CONST_ROUNDING);
+ const __m128i f1 = _mm_add_epi32(e1, k__DCT_CONST_ROUNDING);
+ const __m128i f2 = _mm_add_epi32(e2, k__DCT_CONST_ROUNDING);
+ const __m128i f3 = _mm_add_epi32(e3, k__DCT_CONST_ROUNDING);
+ const __m128i s0 = _mm_srai_epi32(f0, DCT_CONST_BITS);
+ const __m128i s1 = _mm_srai_epi32(f1, DCT_CONST_BITS);
+ const __m128i s2 = _mm_srai_epi32(f2, DCT_CONST_BITS);
+ const __m128i s3 = _mm_srai_epi32(f3, DCT_CONST_BITS);
+ // Combine
+ const __m128i r0 = _mm_packs_epi32(s0, s1);
+ const __m128i r1 = _mm_packs_epi32(s2, s3);
+ // Add/substract
+ const __m128i x0 = _mm_add_epi16(q4, r0);
+ const __m128i x1 = _mm_sub_epi16(q4, r0);
+ const __m128i x2 = _mm_sub_epi16(q7, r1);
+ const __m128i x3 = _mm_add_epi16(q7, r1);
+ // Interleave to do the multiply by constants which gets us into 32bits
+ const __m128i t0 = _mm_unpacklo_epi16(x0, x3);
+ const __m128i t1 = _mm_unpackhi_epi16(x0, x3);
+ const __m128i t2 = _mm_unpacklo_epi16(x1, x2);
+ const __m128i t3 = _mm_unpackhi_epi16(x1, x2);
+ const __m128i u0 = _mm_madd_epi16(t0, k__cospi_p28_p04);
+ const __m128i u1 = _mm_madd_epi16(t1, k__cospi_p28_p04);
+ const __m128i u2 = _mm_madd_epi16(t0, k__cospi_m04_p28);
+ const __m128i u3 = _mm_madd_epi16(t1, k__cospi_m04_p28);
+ const __m128i u4 = _mm_madd_epi16(t2, k__cospi_p12_p20);
+ const __m128i u5 = _mm_madd_epi16(t3, k__cospi_p12_p20);
+ const __m128i u6 = _mm_madd_epi16(t2, k__cospi_m20_p12);
+ const __m128i u7 = _mm_madd_epi16(t3, k__cospi_m20_p12);
+ // dct_const_round_shift
+ const __m128i v0 = _mm_add_epi32(u0, k__DCT_CONST_ROUNDING);
+ const __m128i v1 = _mm_add_epi32(u1, k__DCT_CONST_ROUNDING);
+ const __m128i v2 = _mm_add_epi32(u2, k__DCT_CONST_ROUNDING);
+ const __m128i v3 = _mm_add_epi32(u3, k__DCT_CONST_ROUNDING);
+ const __m128i v4 = _mm_add_epi32(u4, k__DCT_CONST_ROUNDING);
+ const __m128i v5 = _mm_add_epi32(u5, k__DCT_CONST_ROUNDING);
+ const __m128i v6 = _mm_add_epi32(u6, k__DCT_CONST_ROUNDING);
+ const __m128i v7 = _mm_add_epi32(u7, k__DCT_CONST_ROUNDING);
+ const __m128i w0 = _mm_srai_epi32(v0, DCT_CONST_BITS);
+ const __m128i w1 = _mm_srai_epi32(v1, DCT_CONST_BITS);
+ const __m128i w2 = _mm_srai_epi32(v2, DCT_CONST_BITS);
+ const __m128i w3 = _mm_srai_epi32(v3, DCT_CONST_BITS);
+ const __m128i w4 = _mm_srai_epi32(v4, DCT_CONST_BITS);
+ const __m128i w5 = _mm_srai_epi32(v5, DCT_CONST_BITS);
+ const __m128i w6 = _mm_srai_epi32(v6, DCT_CONST_BITS);
+ const __m128i w7 = _mm_srai_epi32(v7, DCT_CONST_BITS);
+ // Combine
+ res1 = _mm_packs_epi32(w0, w1);
+ res7 = _mm_packs_epi32(w2, w3);
+ res5 = _mm_packs_epi32(w4, w5);
+ res3 = _mm_packs_epi32(w6, w7);
+ }
+ // Transpose the 8x8.
+ {+ // 00 01 02 03 04 05 06 07
+ // 10 11 12 13 14 15 16 17
+ // 20 21 22 23 24 25 26 27
+ // 30 31 32 33 34 35 36 37
+ // 40 41 42 43 44 45 46 47
+ // 50 51 52 53 54 55 56 57
+ // 60 61 62 63 64 65 66 67
+ // 70 71 72 73 74 75 76 77
+ const __m128i tr0_0 = _mm_unpacklo_epi16(res0, res1);
+ const __m128i tr0_1 = _mm_unpacklo_epi16(res2, res3);
+ const __m128i tr0_2 = _mm_unpackhi_epi16(res0, res1);
+ const __m128i tr0_3 = _mm_unpackhi_epi16(res2, res3);
+ const __m128i tr0_4 = _mm_unpacklo_epi16(res4, res5);
+ const __m128i tr0_5 = _mm_unpacklo_epi16(res6, res7);
+ const __m128i tr0_6 = _mm_unpackhi_epi16(res4, res5);
+ const __m128i tr0_7 = _mm_unpackhi_epi16(res6, res7);
+ // 00 10 01 11 02 12 03 13
+ // 20 30 21 31 22 32 23 33
+ // 04 14 05 15 06 16 07 17
+ // 24 34 25 35 26 36 27 37
+ // 40 50 41 51 42 52 43 53
+ // 60 70 61 71 62 72 63 73
+ // 54 54 55 55 56 56 57 57
+ // 64 74 65 75 66 76 67 77
+ const __m128i tr1_0 = _mm_unpacklo_epi32(tr0_0, tr0_1);
+ const __m128i tr1_1 = _mm_unpacklo_epi32(tr0_2, tr0_3);
+ const __m128i tr1_2 = _mm_unpackhi_epi32(tr0_0, tr0_1);
+ const __m128i tr1_3 = _mm_unpackhi_epi32(tr0_2, tr0_3);
+ const __m128i tr1_4 = _mm_unpacklo_epi32(tr0_4, tr0_5);
+ const __m128i tr1_5 = _mm_unpacklo_epi32(tr0_6, tr0_7);
+ const __m128i tr1_6 = _mm_unpackhi_epi32(tr0_4, tr0_5);
+ const __m128i tr1_7 = _mm_unpackhi_epi32(tr0_6, tr0_7);
+ // 00 10 20 30 01 11 21 31
+ // 40 50 60 70 41 51 61 71
+ // 02 12 22 32 03 13 23 33
+ // 42 52 62 72 43 53 63 73
+ // 04 14 24 34 05 15 21 36
+ // 44 54 64 74 45 55 61 76
+ // 06 16 26 36 07 17 27 37
+ // 46 56 66 76 47 57 67 77
+ in0 = _mm_unpacklo_epi64(tr1_0, tr1_4);
+ in1 = _mm_unpackhi_epi64(tr1_0, tr1_4);
+ in2 = _mm_unpacklo_epi64(tr1_2, tr1_6);
+ in3 = _mm_unpackhi_epi64(tr1_2, tr1_6);
+ in4 = _mm_unpacklo_epi64(tr1_1, tr1_5);
+ in5 = _mm_unpackhi_epi64(tr1_1, tr1_5);
+ in6 = _mm_unpacklo_epi64(tr1_3, tr1_7);
+ in7 = _mm_unpackhi_epi64(tr1_3, tr1_7);
+ // 00 10 20 30 40 50 60 70
+ // 01 11 21 31 41 51 61 71
+ // 02 12 22 32 42 52 62 72
+ // 03 13 23 33 43 53 63 73
+ // 04 14 24 34 44 54 64 74
+ // 05 15 25 35 45 55 65 75
+ // 06 16 26 36 46 56 66 76
+ // 07 17 27 37 47 57 67 77
+ }
+ }
+ // Post-condition output and store it
+ {+ // Post-condition (division by two)
+ // division of two 16 bits signed numbers using shifts
+ // n / 2 = (n - (n >> 15)) >> 1
+ const __m128i sign_in0 = _mm_srai_epi16(in0, 15);
+ const __m128i sign_in1 = _mm_srai_epi16(in1, 15);
+ const __m128i sign_in2 = _mm_srai_epi16(in2, 15);
+ const __m128i sign_in3 = _mm_srai_epi16(in3, 15);
+ const __m128i sign_in4 = _mm_srai_epi16(in4, 15);
+ const __m128i sign_in5 = _mm_srai_epi16(in5, 15);
+ const __m128i sign_in6 = _mm_srai_epi16(in6, 15);
+ const __m128i sign_in7 = _mm_srai_epi16(in7, 15);
+ in0 = _mm_sub_epi16(in0, sign_in0);
+ in1 = _mm_sub_epi16(in1, sign_in1);
+ in2 = _mm_sub_epi16(in2, sign_in2);
+ in3 = _mm_sub_epi16(in3, sign_in3);
+ in4 = _mm_sub_epi16(in4, sign_in4);
+ in5 = _mm_sub_epi16(in5, sign_in5);
+ in6 = _mm_sub_epi16(in6, sign_in6);
+ in7 = _mm_sub_epi16(in7, sign_in7);
+ in0 = _mm_srai_epi16(in0, 1);
+ in1 = _mm_srai_epi16(in1, 1);
+ in2 = _mm_srai_epi16(in2, 1);
+ in3 = _mm_srai_epi16(in3, 1);
+ in4 = _mm_srai_epi16(in4, 1);
+ in5 = _mm_srai_epi16(in5, 1);
+ in6 = _mm_srai_epi16(in6, 1);
+ in7 = _mm_srai_epi16(in7, 1);
+ // store results
+ _mm_store_si128((__m128i *)(output + 0 * 8), in0);
+ _mm_store_si128((__m128i *)(output + 1 * 8), in1);
+ _mm_store_si128((__m128i *)(output + 2 * 8), in2);
+ _mm_store_si128((__m128i *)(output + 3 * 8), in3);
+ _mm_store_si128((__m128i *)(output + 4 * 8), in4);
+ _mm_store_si128((__m128i *)(output + 5 * 8), in5);
+ _mm_store_si128((__m128i *)(output + 6 * 8), in6);
+ _mm_store_si128((__m128i *)(output + 7 * 8), in7);
+ }
+}
+
+// load 8x8 array
+static INLINE void load_buffer_8x8_avx2(const int16_t *input, __m128i *in,
+ int stride) {+ in[0] = _mm_load_si128((const __m128i *)(input + 0 * stride));
+ in[1] = _mm_load_si128((const __m128i *)(input + 1 * stride));
+ in[2] = _mm_load_si128((const __m128i *)(input + 2 * stride));
+ in[3] = _mm_load_si128((const __m128i *)(input + 3 * stride));
+ in[4] = _mm_load_si128((const __m128i *)(input + 4 * stride));
+ in[5] = _mm_load_si128((const __m128i *)(input + 5 * stride));
+ in[6] = _mm_load_si128((const __m128i *)(input + 6 * stride));
+ in[7] = _mm_load_si128((const __m128i *)(input + 7 * stride));
+
+ in[0] = _mm_slli_epi16(in[0], 2);
+ in[1] = _mm_slli_epi16(in[1], 2);
+ in[2] = _mm_slli_epi16(in[2], 2);
+ in[3] = _mm_slli_epi16(in[3], 2);
+ in[4] = _mm_slli_epi16(in[4], 2);
+ in[5] = _mm_slli_epi16(in[5], 2);
+ in[6] = _mm_slli_epi16(in[6], 2);
+ in[7] = _mm_slli_epi16(in[7], 2);
+}
+
+// right shift and rounding
+static INLINE void right_shift_8x8_avx2(__m128i *res, int const bit) {+ const __m128i kOne = _mm_set1_epi16(1);
+ const int bit_m02 = bit - 2;
+ __m128i sign0 = _mm_srai_epi16(res[0], 15);
+ __m128i sign1 = _mm_srai_epi16(res[1], 15);
+ __m128i sign2 = _mm_srai_epi16(res[2], 15);
+ __m128i sign3 = _mm_srai_epi16(res[3], 15);
+ __m128i sign4 = _mm_srai_epi16(res[4], 15);
+ __m128i sign5 = _mm_srai_epi16(res[5], 15);
+ __m128i sign6 = _mm_srai_epi16(res[6], 15);
+ __m128i sign7 = _mm_srai_epi16(res[7], 15);
+
+ if (bit_m02 >= 0) {+ __m128i k_const_rounding = _mm_slli_epi16(kOne, bit_m02);
+ res[0] = _mm_add_epi16(res[0], k_const_rounding);
+ res[1] = _mm_add_epi16(res[1], k_const_rounding);
+ res[2] = _mm_add_epi16(res[2], k_const_rounding);
+ res[3] = _mm_add_epi16(res[3], k_const_rounding);
+ res[4] = _mm_add_epi16(res[4], k_const_rounding);
+ res[5] = _mm_add_epi16(res[5], k_const_rounding);
+ res[6] = _mm_add_epi16(res[6], k_const_rounding);
+ res[7] = _mm_add_epi16(res[7], k_const_rounding);
+ }
+
+ res[0] = _mm_sub_epi16(res[0], sign0);
+ res[1] = _mm_sub_epi16(res[1], sign1);
+ res[2] = _mm_sub_epi16(res[2], sign2);
+ res[3] = _mm_sub_epi16(res[3], sign3);
+ res[4] = _mm_sub_epi16(res[4], sign4);
+ res[5] = _mm_sub_epi16(res[5], sign5);
+ res[6] = _mm_sub_epi16(res[6], sign6);
+ res[7] = _mm_sub_epi16(res[7], sign7);
+
+ res[0] = _mm_srai_epi16(res[0], bit);
+ res[1] = _mm_srai_epi16(res[1], bit);
+ res[2] = _mm_srai_epi16(res[2], bit);
+ res[3] = _mm_srai_epi16(res[3], bit);
+ res[4] = _mm_srai_epi16(res[4], bit);
+ res[5] = _mm_srai_epi16(res[5], bit);
+ res[6] = _mm_srai_epi16(res[6], bit);
+ res[7] = _mm_srai_epi16(res[7], bit);
+}
+
+// write 8x8 array
+static INLINE void write_buffer_8x8_avx2(int16_t *output, __m128i *res, int stride) {+ _mm_store_si128((__m128i *)(output + 0 * stride), res[0]);
+ _mm_store_si128((__m128i *)(output + 1 * stride), res[1]);
+ _mm_store_si128((__m128i *)(output + 2 * stride), res[2]);
+ _mm_store_si128((__m128i *)(output + 3 * stride), res[3]);
+ _mm_store_si128((__m128i *)(output + 4 * stride), res[4]);
+ _mm_store_si128((__m128i *)(output + 5 * stride), res[5]);
+ _mm_store_si128((__m128i *)(output + 6 * stride), res[6]);
+ _mm_store_si128((__m128i *)(output + 7 * stride), res[7]);
+}
+
+// perform in-place transpose
+static INLINE void array_transpose_8x8_avx2(__m128i *in, __m128i *res) {+ const __m128i tr0_0 = _mm_unpacklo_epi16(in[0], in[1]);
+ const __m128i tr0_1 = _mm_unpacklo_epi16(in[2], in[3]);
+ const __m128i tr0_2 = _mm_unpackhi_epi16(in[0], in[1]);
+ const __m128i tr0_3 = _mm_unpackhi_epi16(in[2], in[3]);
+ const __m128i tr0_4 = _mm_unpacklo_epi16(in[4], in[5]);
+ const __m128i tr0_5 = _mm_unpacklo_epi16(in[6], in[7]);
+ const __m128i tr0_6 = _mm_unpackhi_epi16(in[4], in[5]);
+ const __m128i tr0_7 = _mm_unpackhi_epi16(in[6], in[7]);
+ // 00 10 01 11 02 12 03 13
+ // 20 30 21 31 22 32 23 33
+ // 04 14 05 15 06 16 07 17
+ // 24 34 25 35 26 36 27 37
+ // 40 50 41 51 42 52 43 53
+ // 60 70 61 71 62 72 63 73
+ // 44 54 45 55 46 56 47 57
+ // 64 74 65 75 66 76 67 77
+ const __m128i tr1_0 = _mm_unpacklo_epi32(tr0_0, tr0_1);
+ const __m128i tr1_1 = _mm_unpacklo_epi32(tr0_4, tr0_5);
+ const __m128i tr1_2 = _mm_unpackhi_epi32(tr0_0, tr0_1);
+ const __m128i tr1_3 = _mm_unpackhi_epi32(tr0_4, tr0_5);
+ const __m128i tr1_4 = _mm_unpacklo_epi32(tr0_2, tr0_3);
+ const __m128i tr1_5 = _mm_unpacklo_epi32(tr0_6, tr0_7);
+ const __m128i tr1_6 = _mm_unpackhi_epi32(tr0_2, tr0_3);
+ const __m128i tr1_7 = _mm_unpackhi_epi32(tr0_6, tr0_7);
+ // 00 10 20 30 01 11 21 31
+ // 40 50 60 70 41 51 61 71
+ // 02 12 22 32 03 13 23 33
+ // 42 52 62 72 43 53 63 73
+ // 04 14 24 34 05 15 25 35
+ // 44 54 64 74 45 55 65 75
+ // 06 16 26 36 07 17 27 37
+ // 46 56 66 76 47 57 67 77
+ res[0] = _mm_unpacklo_epi64(tr1_0, tr1_1);
+ res[1] = _mm_unpackhi_epi64(tr1_0, tr1_1);
+ res[2] = _mm_unpacklo_epi64(tr1_2, tr1_3);
+ res[3] = _mm_unpackhi_epi64(tr1_2, tr1_3);
+ res[4] = _mm_unpacklo_epi64(tr1_4, tr1_5);
+ res[5] = _mm_unpackhi_epi64(tr1_4, tr1_5);
+ res[6] = _mm_unpacklo_epi64(tr1_6, tr1_7);
+ res[7] = _mm_unpackhi_epi64(tr1_6, tr1_7);
+ // 00 10 20 30 40 50 60 70
+ // 01 11 21 31 41 51 61 71
+ // 02 12 22 32 42 52 62 72
+ // 03 13 23 33 43 53 63 73
+ // 04 14 24 34 44 54 64 74
+ // 05 15 25 35 45 55 65 75
+ // 06 16 26 36 46 56 66 76
+ // 07 17 27 37 47 57 67 77
+}
+
+void fdct8_1d_avx2(__m128i *in) {+ // constants
+ const __m128i k__cospi_p16_p16 = _mm_set1_epi16(cospi_16_64);
+ const __m128i k__cospi_p16_m16 = pair_set_epi16(cospi_16_64, -cospi_16_64);
+ const __m128i k__cospi_p24_p08 = pair_set_epi16(cospi_24_64, cospi_8_64);
+ const __m128i k__cospi_m08_p24 = pair_set_epi16(-cospi_8_64, cospi_24_64);
+ const __m128i k__cospi_p28_p04 = pair_set_epi16(cospi_28_64, cospi_4_64);
+ const __m128i k__cospi_m04_p28 = pair_set_epi16(-cospi_4_64, cospi_28_64);
+ const __m128i k__cospi_p12_p20 = pair_set_epi16(cospi_12_64, cospi_20_64);
+ const __m128i k__cospi_m20_p12 = pair_set_epi16(-cospi_20_64, cospi_12_64);
+ const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);
+ __m128i u0, u1, u2, u3, u4, u5, u6, u7;
+ __m128i v0, v1, v2, v3, v4, v5, v6, v7;
+ __m128i s0, s1, s2, s3, s4, s5, s6, s7;
+
+ // stage 1
+ s0 = _mm_add_epi16(in[0], in[7]);
+ s1 = _mm_add_epi16(in[1], in[6]);
+ s2 = _mm_add_epi16(in[2], in[5]);
+ s3 = _mm_add_epi16(in[3], in[4]);
+ s4 = _mm_sub_epi16(in[3], in[4]);
+ s5 = _mm_sub_epi16(in[2], in[5]);
+ s6 = _mm_sub_epi16(in[1], in[6]);
+ s7 = _mm_sub_epi16(in[0], in[7]);
+
+ u0 = _mm_add_epi16(s0, s3);
+ u1 = _mm_add_epi16(s1, s2);
+ u2 = _mm_sub_epi16(s1, s2);
+ u3 = _mm_sub_epi16(s0, s3);
+ // interleave and perform butterfly multiplication/addition
+ v0 = _mm_unpacklo_epi16(u0, u1);
+ v1 = _mm_unpackhi_epi16(u0, u1);
+ v2 = _mm_unpacklo_epi16(u2, u3);
+ v3 = _mm_unpackhi_epi16(u2, u3);
+
+ u0 = _mm_madd_epi16(v0, k__cospi_p16_p16);
+ u1 = _mm_madd_epi16(v1, k__cospi_p16_p16);
+ u2 = _mm_madd_epi16(v0, k__cospi_p16_m16);
+ u3 = _mm_madd_epi16(v1, k__cospi_p16_m16);
+ u4 = _mm_madd_epi16(v2, k__cospi_p24_p08);
+ u5 = _mm_madd_epi16(v3, k__cospi_p24_p08);
+ u6 = _mm_madd_epi16(v2, k__cospi_m08_p24);
+ u7 = _mm_madd_epi16(v3, k__cospi_m08_p24);
+
+ // shift and rounding
+ v0 = _mm_add_epi32(u0, k__DCT_CONST_ROUNDING);
+ v1 = _mm_add_epi32(u1, k__DCT_CONST_ROUNDING);
+ v2 = _mm_add_epi32(u2, k__DCT_CONST_ROUNDING);
+ v3 = _mm_add_epi32(u3, k__DCT_CONST_ROUNDING);
+ v4 = _mm_add_epi32(u4, k__DCT_CONST_ROUNDING);
+ v5 = _mm_add_epi32(u5, k__DCT_CONST_ROUNDING);
+ v6 = _mm_add_epi32(u6, k__DCT_CONST_ROUNDING);
+ v7 = _mm_add_epi32(u7, k__DCT_CONST_ROUNDING);
+
+ u0 = _mm_srai_epi32(v0, DCT_CONST_BITS);
+ u1 = _mm_srai_epi32(v1, DCT_CONST_BITS);
+ u2 = _mm_srai_epi32(v2, DCT_CONST_BITS);
+ u3 = _mm_srai_epi32(v3, DCT_CONST_BITS);
+ u4 = _mm_srai_epi32(v4, DCT_CONST_BITS);
+ u5 = _mm_srai_epi32(v5, DCT_CONST_BITS);
+ u6 = _mm_srai_epi32(v6, DCT_CONST_BITS);
+ u7 = _mm_srai_epi32(v7, DCT_CONST_BITS);
+
+ in[0] = _mm_packs_epi32(u0, u1);
+ in[2] = _mm_packs_epi32(u4, u5);
+ in[4] = _mm_packs_epi32(u2, u3);
+ in[6] = _mm_packs_epi32(u6, u7);
+
+ // stage 2
+ // interleave and perform butterfly multiplication/addition
+ u0 = _mm_unpacklo_epi16(s6, s5);
+ u1 = _mm_unpackhi_epi16(s6, s5);
+ v0 = _mm_madd_epi16(u0, k__cospi_p16_m16);
+ v1 = _mm_madd_epi16(u1, k__cospi_p16_m16);
+ v2 = _mm_madd_epi16(u0, k__cospi_p16_p16);
+ v3 = _mm_madd_epi16(u1, k__cospi_p16_p16);
+
+ // shift and rounding
+ u0 = _mm_add_epi32(v0, k__DCT_CONST_ROUNDING);
+ u1 = _mm_add_epi32(v1, k__DCT_CONST_ROUNDING);
+ u2 = _mm_add_epi32(v2, k__DCT_CONST_ROUNDING);
+ u3 = _mm_add_epi32(v3, k__DCT_CONST_ROUNDING);
+
+ v0 = _mm_srai_epi32(u0, DCT_CONST_BITS);
+ v1 = _mm_srai_epi32(u1, DCT_CONST_BITS);
+ v2 = _mm_srai_epi32(u2, DCT_CONST_BITS);
+ v3 = _mm_srai_epi32(u3, DCT_CONST_BITS);
+
+ u0 = _mm_packs_epi32(v0, v1);
+ u1 = _mm_packs_epi32(v2, v3);
+
+ // stage 3
+ s0 = _mm_add_epi16(s4, u0);
+ s1 = _mm_sub_epi16(s4, u0);
+ s2 = _mm_sub_epi16(s7, u1);
+ s3 = _mm_add_epi16(s7, u1);
+
+ // stage 4
+ u0 = _mm_unpacklo_epi16(s0, s3);
+ u1 = _mm_unpackhi_epi16(s0, s3);
+ u2 = _mm_unpacklo_epi16(s1, s2);
+ u3 = _mm_unpackhi_epi16(s1, s2);
+
+ v0 = _mm_madd_epi16(u0, k__cospi_p28_p04);
+ v1 = _mm_madd_epi16(u1, k__cospi_p28_p04);
+ v2 = _mm_madd_epi16(u2, k__cospi_p12_p20);
+ v3 = _mm_madd_epi16(u3, k__cospi_p12_p20);
+ v4 = _mm_madd_epi16(u2, k__cospi_m20_p12);
+ v5 = _mm_madd_epi16(u3, k__cospi_m20_p12);
+ v6 = _mm_madd_epi16(u0, k__cospi_m04_p28);
+ v7 = _mm_madd_epi16(u1, k__cospi_m04_p28);
+
+ // shift and rounding
+ u0 = _mm_add_epi32(v0, k__DCT_CONST_ROUNDING);
+ u1 = _mm_add_epi32(v1, k__DCT_CONST_ROUNDING);
+ u2 = _mm_add_epi32(v2, k__DCT_CONST_ROUNDING);
+ u3 = _mm_add_epi32(v3, k__DCT_CONST_ROUNDING);
+ u4 = _mm_add_epi32(v4, k__DCT_CONST_ROUNDING);
+ u5 = _mm_add_epi32(v5, k__DCT_CONST_ROUNDING);
+ u6 = _mm_add_epi32(v6, k__DCT_CONST_ROUNDING);
+ u7 = _mm_add_epi32(v7, k__DCT_CONST_ROUNDING);
+
+ v0 = _mm_srai_epi32(u0, DCT_CONST_BITS);
+ v1 = _mm_srai_epi32(u1, DCT_CONST_BITS);
+ v2 = _mm_srai_epi32(u2, DCT_CONST_BITS);
+ v3 = _mm_srai_epi32(u3, DCT_CONST_BITS);
+ v4 = _mm_srai_epi32(u4, DCT_CONST_BITS);
+ v5 = _mm_srai_epi32(u5, DCT_CONST_BITS);
+ v6 = _mm_srai_epi32(u6, DCT_CONST_BITS);
+ v7 = _mm_srai_epi32(u7, DCT_CONST_BITS);
+
+ in[1] = _mm_packs_epi32(v0, v1);
+ in[3] = _mm_packs_epi32(v4, v5);
+ in[5] = _mm_packs_epi32(v2, v3);
+ in[7] = _mm_packs_epi32(v6, v7);
+
+ // transpose
+ array_transpose_8x8_avx2(in, in);
+}
+
+void fadst8_1d_avx2(__m128i *in) {+ // Constants
+ const __m128i k__cospi_p02_p30 = pair_set_epi16(cospi_2_64, cospi_30_64);
+ const __m128i k__cospi_p30_m02 = pair_set_epi16(cospi_30_64, -cospi_2_64);
+ const __m128i k__cospi_p10_p22 = pair_set_epi16(cospi_10_64, cospi_22_64);
+ const __m128i k__cospi_p22_m10 = pair_set_epi16(cospi_22_64, -cospi_10_64);
+ const __m128i k__cospi_p18_p14 = pair_set_epi16(cospi_18_64, cospi_14_64);
+ const __m128i k__cospi_p14_m18 = pair_set_epi16(cospi_14_64, -cospi_18_64);
+ const __m128i k__cospi_p26_p06 = pair_set_epi16(cospi_26_64, cospi_6_64);
+ const __m128i k__cospi_p06_m26 = pair_set_epi16(cospi_6_64, -cospi_26_64);
+ const __m128i k__cospi_p08_p24 = pair_set_epi16(cospi_8_64, cospi_24_64);
+ const __m128i k__cospi_p24_m08 = pair_set_epi16(cospi_24_64, -cospi_8_64);
+ const __m128i k__cospi_m24_p08 = pair_set_epi16(-cospi_24_64, cospi_8_64);
+ const __m128i k__cospi_p16_m16 = pair_set_epi16(cospi_16_64, -cospi_16_64);
+ const __m128i k__cospi_p16_p16 = _mm_set1_epi16(cospi_16_64);
+ const __m128i k__const_0 = _mm_set1_epi16(0);
+ const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);
+
+ __m128i u0, u1, u2, u3, u4, u5, u6, u7, u8, u9, u10, u11, u12, u13, u14, u15;
+ __m128i v0, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15;
+ __m128i w0, w1, w2, w3, w4, w5, w6, w7, w8, w9, w10, w11, w12, w13, w14, w15;
+ __m128i s0, s1, s2, s3, s4, s5, s6, s7;
+ __m128i in0, in1, in2, in3, in4, in5, in6, in7;
+
+ // properly aligned for butterfly input
+ in0 = in[7];
+ in1 = in[0];
+ in2 = in[5];
+ in3 = in[2];
+ in4 = in[3];
+ in5 = in[4];
+ in6 = in[1];
+ in7 = in[6];
+
+ // column transformation
+ // stage 1
+ // interleave and multiply/add into 32-bit integer
+ s0 = _mm_unpacklo_epi16(in0, in1);
+ s1 = _mm_unpackhi_epi16(in0, in1);
+ s2 = _mm_unpacklo_epi16(in2, in3);
+ s3 = _mm_unpackhi_epi16(in2, in3);
+ s4 = _mm_unpacklo_epi16(in4, in5);
+ s5 = _mm_unpackhi_epi16(in4, in5);
+ s6 = _mm_unpacklo_epi16(in6, in7);
+ s7 = _mm_unpackhi_epi16(in6, in7);
+
+ u0 = _mm_madd_epi16(s0, k__cospi_p02_p30);
+ u1 = _mm_madd_epi16(s1, k__cospi_p02_p30);
+ u2 = _mm_madd_epi16(s0, k__cospi_p30_m02);
+ u3 = _mm_madd_epi16(s1, k__cospi_p30_m02);
+ u4 = _mm_madd_epi16(s2, k__cospi_p10_p22);
+ u5 = _mm_madd_epi16(s3, k__cospi_p10_p22);
+ u6 = _mm_madd_epi16(s2, k__cospi_p22_m10);
+ u7 = _mm_madd_epi16(s3, k__cospi_p22_m10);
+ u8 = _mm_madd_epi16(s4, k__cospi_p18_p14);
+ u9 = _mm_madd_epi16(s5, k__cospi_p18_p14);
+ u10 = _mm_madd_epi16(s4, k__cospi_p14_m18);
+ u11 = _mm_madd_epi16(s5, k__cospi_p14_m18);
+ u12 = _mm_madd_epi16(s6, k__cospi_p26_p06);
+ u13 = _mm_madd_epi16(s7, k__cospi_p26_p06);
+ u14 = _mm_madd_epi16(s6, k__cospi_p06_m26);
+ u15 = _mm_madd_epi16(s7, k__cospi_p06_m26);
+
+ // addition
+ w0 = _mm_add_epi32(u0, u8);
+ w1 = _mm_add_epi32(u1, u9);
+ w2 = _mm_add_epi32(u2, u10);
+ w3 = _mm_add_epi32(u3, u11);
+ w4 = _mm_add_epi32(u4, u12);
+ w5 = _mm_add_epi32(u5, u13);
+ w6 = _mm_add_epi32(u6, u14);
+ w7 = _mm_add_epi32(u7, u15);
+ w8 = _mm_sub_epi32(u0, u8);
+ w9 = _mm_sub_epi32(u1, u9);
+ w10 = _mm_sub_epi32(u2, u10);
+ w11 = _mm_sub_epi32(u3, u11);
+ w12 = _mm_sub_epi32(u4, u12);
+ w13 = _mm_sub_epi32(u5, u13);
+ w14 = _mm_sub_epi32(u6, u14);
+ w15 = _mm_sub_epi32(u7, u15);
+
+ // shift and rounding
+ v0 = _mm_add_epi32(w0, k__DCT_CONST_ROUNDING);
+ v1 = _mm_add_epi32(w1, k__DCT_CONST_ROUNDING);
+ v2 = _mm_add_epi32(w2, k__DCT_CONST_ROUNDING);
+ v3 = _mm_add_epi32(w3, k__DCT_CONST_ROUNDING);
+ v4 = _mm_add_epi32(w4, k__DCT_CONST_ROUNDING);
+ v5 = _mm_add_epi32(w5, k__DCT_CONST_ROUNDING);
+ v6 = _mm_add_epi32(w6, k__DCT_CONST_ROUNDING);
+ v7 = _mm_add_epi32(w7, k__DCT_CONST_ROUNDING);
+ v8 = _mm_add_epi32(w8, k__DCT_CONST_ROUNDING);
+ v9 = _mm_add_epi32(w9, k__DCT_CONST_ROUNDING);
+ v10 = _mm_add_epi32(w10, k__DCT_CONST_ROUNDING);
+ v11 = _mm_add_epi32(w11, k__DCT_CONST_ROUNDING);
+ v12 = _mm_add_epi32(w12, k__DCT_CONST_ROUNDING);
+ v13 = _mm_add_epi32(w13, k__DCT_CONST_ROUNDING);
+ v14 = _mm_add_epi32(w14, k__DCT_CONST_ROUNDING);
+ v15 = _mm_add_epi32(w15, k__DCT_CONST_ROUNDING);
+
+ u0 = _mm_srai_epi32(v0, DCT_CONST_BITS);
+ u1 = _mm_srai_epi32(v1, DCT_CONST_BITS);
+ u2 = _mm_srai_epi32(v2, DCT_CONST_BITS);
+ u3 = _mm_srai_epi32(v3, DCT_CONST_BITS);
+ u4 = _mm_srai_epi32(v4, DCT_CONST_BITS);
+ u5 = _mm_srai_epi32(v5, DCT_CONST_BITS);
+ u6 = _mm_srai_epi32(v6, DCT_CONST_BITS);
+ u7 = _mm_srai_epi32(v7, DCT_CONST_BITS);
+ u8 = _mm_srai_epi32(v8, DCT_CONST_BITS);
+ u9 = _mm_srai_epi32(v9, DCT_CONST_BITS);
+ u10 = _mm_srai_epi32(v10, DCT_CONST_BITS);
+ u11 = _mm_srai_epi32(v11, DCT_CONST_BITS);
+ u12 = _mm_srai_epi32(v12, DCT_CONST_BITS);
+ u13 = _mm_srai_epi32(v13, DCT_CONST_BITS);
+ u14 = _mm_srai_epi32(v14, DCT_CONST_BITS);
+ u15 = _mm_srai_epi32(v15, DCT_CONST_BITS);
+
+ // back to 16-bit and pack 8 integers into __m128i
+ in[0] = _mm_packs_epi32(u0, u1);
+ in[1] = _mm_packs_epi32(u2, u3);
+ in[2] = _mm_packs_epi32(u4, u5);
+ in[3] = _mm_packs_epi32(u6, u7);
+ in[4] = _mm_packs_epi32(u8, u9);
+ in[5] = _mm_packs_epi32(u10, u11);
+ in[6] = _mm_packs_epi32(u12, u13);
+ in[7] = _mm_packs_epi32(u14, u15);
+
+ // stage 2
+ s0 = _mm_add_epi16(in[0], in[2]);
+ s1 = _mm_add_epi16(in[1], in[3]);
+ s2 = _mm_sub_epi16(in[0], in[2]);
+ s3 = _mm_sub_epi16(in[1], in[3]);
+ u0 = _mm_unpacklo_epi16(in[4], in[5]);
+ u1 = _mm_unpackhi_epi16(in[4], in[5]);
+ u2 = _mm_unpacklo_epi16(in[6], in[7]);
+ u3 = _mm_unpackhi_epi16(in[6], in[7]);
+
+ v0 = _mm_madd_epi16(u0, k__cospi_p08_p24);
+ v1 = _mm_madd_epi16(u1, k__cospi_p08_p24);
+ v2 = _mm_madd_epi16(u0, k__cospi_p24_m08);
+ v3 = _mm_madd_epi16(u1, k__cospi_p24_m08);
+ v4 = _mm_madd_epi16(u2, k__cospi_m24_p08);
+ v5 = _mm_madd_epi16(u3, k__cospi_m24_p08);
+ v6 = _mm_madd_epi16(u2, k__cospi_p08_p24);
+ v7 = _mm_madd_epi16(u3, k__cospi_p08_p24);
+
+ w0 = _mm_add_epi32(v0, v4);
+ w1 = _mm_add_epi32(v1, v5);
+ w2 = _mm_add_epi32(v2, v6);
+ w3 = _mm_add_epi32(v3, v7);
+ w4 = _mm_sub_epi32(v0, v4);
+ w5 = _mm_sub_epi32(v1, v5);
+ w6 = _mm_sub_epi32(v2, v6);
+ w7 = _mm_sub_epi32(v3, v7);
+
+ v0 = _mm_add_epi32(w0, k__DCT_CONST_ROUNDING);
+ v1 = _mm_add_epi32(w1, k__DCT_CONST_ROUNDING);
+ v2 = _mm_add_epi32(w2, k__DCT_CONST_ROUNDING);
+ v3 = _mm_add_epi32(w3, k__DCT_CONST_ROUNDING);
+ v4 = _mm_add_epi32(w4, k__DCT_CONST_ROUNDING);
+ v5 = _mm_add_epi32(w5, k__DCT_CONST_ROUNDING);
+ v6 = _mm_add_epi32(w6, k__DCT_CONST_ROUNDING);
+ v7 = _mm_add_epi32(w7, k__DCT_CONST_ROUNDING);
+
+ u0 = _mm_srai_epi32(v0, DCT_CONST_BITS);
+ u1 = _mm_srai_epi32(v1, DCT_CONST_BITS);
+ u2 = _mm_srai_epi32(v2, DCT_CONST_BITS);
+ u3 = _mm_srai_epi32(v3, DCT_CONST_BITS);
+ u4 = _mm_srai_epi32(v4, DCT_CONST_BITS);
+ u5 = _mm_srai_epi32(v5, DCT_CONST_BITS);
+ u6 = _mm_srai_epi32(v6, DCT_CONST_BITS);
+ u7 = _mm_srai_epi32(v7, DCT_CONST_BITS);
+
+ // back to 16-bit intergers
+ s4 = _mm_packs_epi32(u0, u1);
+ s5 = _mm_packs_epi32(u2, u3);
+ s6 = _mm_packs_epi32(u4, u5);
+ s7 = _mm_packs_epi32(u6, u7);
+
+ // stage 3
+ u0 = _mm_unpacklo_epi16(s2, s3);
+ u1 = _mm_unpackhi_epi16(s2, s3);
+ u2 = _mm_unpacklo_epi16(s6, s7);
+ u3 = _mm_unpackhi_epi16(s6, s7);
+
+ v0 = _mm_madd_epi16(u0, k__cospi_p16_p16);
+ v1 = _mm_madd_epi16(u1, k__cospi_p16_p16);
+ v2 = _mm_madd_epi16(u0, k__cospi_p16_m16);
+ v3 = _mm_madd_epi16(u1, k__cospi_p16_m16);
+ v4 = _mm_madd_epi16(u2, k__cospi_p16_p16);
+ v5 = _mm_madd_epi16(u3, k__cospi_p16_p16);
+ v6 = _mm_madd_epi16(u2, k__cospi_p16_m16);
+ v7 = _mm_madd_epi16(u3, k__cospi_p16_m16);
+
+ u0 = _mm_add_epi32(v0, k__DCT_CONST_ROUNDING);
+ u1 = _mm_add_epi32(v1, k__DCT_CONST_ROUNDING);
+ u2 = _mm_add_epi32(v2, k__DCT_CONST_ROUNDING);
+ u3 = _mm_add_epi32(v3, k__DCT_CONST_ROUNDING);
+ u4 = _mm_add_epi32(v4, k__DCT_CONST_ROUNDING);
+ u5 = _mm_add_epi32(v5, k__DCT_CONST_ROUNDING);
+ u6 = _mm_add_epi32(v6, k__DCT_CONST_ROUNDING);
+ u7 = _mm_add_epi32(v7, k__DCT_CONST_ROUNDING);
+
+ v0 = _mm_srai_epi32(u0, DCT_CONST_BITS);
+ v1 = _mm_srai_epi32(u1, DCT_CONST_BITS);
+ v2 = _mm_srai_epi32(u2, DCT_CONST_BITS);
+ v3 = _mm_srai_epi32(u3, DCT_CONST_BITS);
+ v4 = _mm_srai_epi32(u4, DCT_CONST_BITS);
+ v5 = _mm_srai_epi32(u5, DCT_CONST_BITS);
+ v6 = _mm_srai_epi32(u6, DCT_CONST_BITS);
+ v7 = _mm_srai_epi32(u7, DCT_CONST_BITS);
+
+ s2 = _mm_packs_epi32(v0, v1);
+ s3 = _mm_packs_epi32(v2, v3);
+ s6 = _mm_packs_epi32(v4, v5);
+ s7 = _mm_packs_epi32(v6, v7);
+
+ // FIXME(jingning): do subtract using bit inversion?
+ in[0] = s0;
+ in[1] = _mm_sub_epi16(k__const_0, s4);
+ in[2] = s6;
+ in[3] = _mm_sub_epi16(k__const_0, s2);
+ in[4] = s3;
+ in[5] = _mm_sub_epi16(k__const_0, s7);
+ in[6] = s5;
+ in[7] = _mm_sub_epi16(k__const_0, s1);
+
+ // transpose
+ array_transpose_8x8_avx2(in, in);
+}
+
+void vp9_short_fht8x8_avx2(const int16_t *input, int16_t *output,
+ int stride, int tx_type) {+ __m128i in[8];
+ load_buffer_8x8_avx2(input, in, stride);
+ switch (tx_type) {+ case 0: // DCT_DCT
+ fdct8_1d_avx2(in);
+ fdct8_1d_avx2(in);
+ break;
+ case 1: // ADST_DCT
+ fadst8_1d_avx2(in);
+ fdct8_1d_avx2(in);
+ break;
+ case 2: // DCT_ADST
+ fdct8_1d_avx2(in);
+ fadst8_1d_avx2(in);
+ break;
+ case 3: // ADST_ADST
+ fadst8_1d_avx2(in);
+ fadst8_1d_avx2(in);
+ break;
+ default:
+ assert(0);
+ break;
+ }
+ right_shift_8x8_avx2(in, 1);
+ write_buffer_8x8_avx2(output, in, 8);
+}
+
+void vp9_fdct16x16_avx2(const int16_t *input, int16_t *output, int stride) {+ // The 2D transform is done with two passes which are actually pretty
+ // similar. In the first one, we transform the columns and transpose
+ // the results. In the second one, we transform the rows. To achieve that,
+ // as the first pass results are transposed, we tranpose the columns (that
+ // is the transposed rows) and transpose the results (so that it goes back
+ // in normal/row positions).
+ int pass;
+ // We need an intermediate buffer between passes.
+ DECLARE_ALIGNED_ARRAY(16, int16_t, intermediate, 256);
+ const int16_t *in = input;
+ int16_t *out = intermediate;
+ // Constants
+ // When we use them, in one case, they are all the same. In all others
+ // it's a pair of them that we need to repeat four times. This is done
+ // by constructing the 32 bit constant corresponding to that pair.
+ const __m128i k__cospi_p16_p16 = _mm_set1_epi16(cospi_16_64);
+ const __m128i k__cospi_p16_m16 = pair_set_epi16(cospi_16_64, -cospi_16_64);
+ const __m128i k__cospi_p24_p08 = pair_set_epi16(cospi_24_64, cospi_8_64);
+ const __m128i k__cospi_m24_m08 = pair_set_epi16(-cospi_24_64, -cospi_8_64);
+ const __m128i k__cospi_m08_p24 = pair_set_epi16(-cospi_8_64, cospi_24_64);
+ const __m128i k__cospi_p28_p04 = pair_set_epi16(cospi_28_64, cospi_4_64);
+ const __m128i k__cospi_m04_p28 = pair_set_epi16(-cospi_4_64, cospi_28_64);
+ const __m128i k__cospi_p12_p20 = pair_set_epi16(cospi_12_64, cospi_20_64);
+ const __m128i k__cospi_m20_p12 = pair_set_epi16(-cospi_20_64, cospi_12_64);
+ const __m128i k__cospi_p30_p02 = pair_set_epi16(cospi_30_64, cospi_2_64);
+ const __m128i k__cospi_p14_p18 = pair_set_epi16(cospi_14_64, cospi_18_64);
+ const __m128i k__cospi_m02_p30 = pair_set_epi16(-cospi_2_64, cospi_30_64);
+ const __m128i k__cospi_m18_p14 = pair_set_epi16(-cospi_18_64, cospi_14_64);
+ const __m128i k__cospi_p22_p10 = pair_set_epi16(cospi_22_64, cospi_10_64);
+ const __m128i k__cospi_p06_p26 = pair_set_epi16(cospi_6_64, cospi_26_64);
+ const __m128i k__cospi_m10_p22 = pair_set_epi16(-cospi_10_64, cospi_22_64);
+ const __m128i k__cospi_m26_p06 = pair_set_epi16(-cospi_26_64, cospi_6_64);
+ const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);
+ const __m128i kOne = _mm_set1_epi16(1);
+ // Do the two transform/transpose passes
+ for (pass = 0; pass < 2; ++pass) {+ // We process eight columns (transposed rows in second pass) at a time.
+ int column_start;
+ for (column_start = 0; column_start < 16; column_start += 8) {+ __m128i in00, in01, in02, in03, in04, in05, in06, in07;
+ __m128i in08, in09, in10, in11, in12, in13, in14, in15;
+ __m128i input0, input1, input2, input3, input4, input5, input6, input7;
+ __m128i step1_0, step1_1, step1_2, step1_3;
+ __m128i step1_4, step1_5, step1_6, step1_7;
+ __m128i step2_1, step2_2, step2_3, step2_4, step2_5, step2_6;
+ __m128i step3_0, step3_1, step3_2, step3_3;
+ __m128i step3_4, step3_5, step3_6, step3_7;
+ __m128i res00, res01, res02, res03, res04, res05, res06, res07;
+ __m128i res08, res09, res10, res11, res12, res13, res14, res15;
+ // Load and pre-condition input.
+ if (0 == pass) {+ in00 = _mm_load_si128((const __m128i *)(in + 0 * stride));
+ in01 = _mm_load_si128((const __m128i *)(in + 1 * stride));
+ in02 = _mm_load_si128((const __m128i *)(in + 2 * stride));
+ in03 = _mm_load_si128((const __m128i *)(in + 3 * stride));
+ in04 = _mm_load_si128((const __m128i *)(in + 4 * stride));
+ in05 = _mm_load_si128((const __m128i *)(in + 5 * stride));
+ in06 = _mm_load_si128((const __m128i *)(in + 6 * stride));
+ in07 = _mm_load_si128((const __m128i *)(in + 7 * stride));
+ in08 = _mm_load_si128((const __m128i *)(in + 8 * stride));
+ in09 = _mm_load_si128((const __m128i *)(in + 9 * stride));
+ in10 = _mm_load_si128((const __m128i *)(in + 10 * stride));
+ in11 = _mm_load_si128((const __m128i *)(in + 11 * stride));
+ in12 = _mm_load_si128((const __m128i *)(in + 12 * stride));
+ in13 = _mm_load_si128((const __m128i *)(in + 13 * stride));
+ in14 = _mm_load_si128((const __m128i *)(in + 14 * stride));
+ in15 = _mm_load_si128((const __m128i *)(in + 15 * stride));
+ // x = x << 2
+ in00 = _mm_slli_epi16(in00, 2);
+ in01 = _mm_slli_epi16(in01, 2);
+ in02 = _mm_slli_epi16(in02, 2);
+ in03 = _mm_slli_epi16(in03, 2);
+ in04 = _mm_slli_epi16(in04, 2);
+ in05 = _mm_slli_epi16(in05, 2);
+ in06 = _mm_slli_epi16(in06, 2);
+ in07 = _mm_slli_epi16(in07, 2);
+ in08 = _mm_slli_epi16(in08, 2);
+ in09 = _mm_slli_epi16(in09, 2);
+ in10 = _mm_slli_epi16(in10, 2);
+ in11 = _mm_slli_epi16(in11, 2);
+ in12 = _mm_slli_epi16(in12, 2);
+ in13 = _mm_slli_epi16(in13, 2);
+ in14 = _mm_slli_epi16(in14, 2);
+ in15 = _mm_slli_epi16(in15, 2);
+ } else {+ in00 = _mm_load_si128((const __m128i *)(in + 0 * 16));
+ in01 = _mm_load_si128((const __m128i *)(in + 1 * 16));
+ in02 = _mm_load_si128((const __m128i *)(in + 2 * 16));
+ in03 = _mm_load_si128((const __m128i *)(in + 3 * 16));
+ in04 = _mm_load_si128((const __m128i *)(in + 4 * 16));
+ in05 = _mm_load_si128((const __m128i *)(in + 5 * 16));
+ in06 = _mm_load_si128((const __m128i *)(in + 6 * 16));
+ in07 = _mm_load_si128((const __m128i *)(in + 7 * 16));
+ in08 = _mm_load_si128((const __m128i *)(in + 8 * 16));
+ in09 = _mm_load_si128((const __m128i *)(in + 9 * 16));
+ in10 = _mm_load_si128((const __m128i *)(in + 10 * 16));
+ in11 = _mm_load_si128((const __m128i *)(in + 11 * 16));
+ in12 = _mm_load_si128((const __m128i *)(in + 12 * 16));
+ in13 = _mm_load_si128((const __m128i *)(in + 13 * 16));
+ in14 = _mm_load_si128((const __m128i *)(in + 14 * 16));
+ in15 = _mm_load_si128((const __m128i *)(in + 15 * 16));
+ // x = (x + 1) >> 2
+ in00 = _mm_add_epi16(in00, kOne);
+ in01 = _mm_add_epi16(in01, kOne);
+ in02 = _mm_add_epi16(in02, kOne);
+ in03 = _mm_add_epi16(in03, kOne);
+ in04 = _mm_add_epi16(in04, kOne);
+ in05 = _mm_add_epi16(in05, kOne);
+ in06 = _mm_add_epi16(in06, kOne);
+ in07 = _mm_add_epi16(in07, kOne);
+ in08 = _mm_add_epi16(in08, kOne);
+ in09 = _mm_add_epi16(in09, kOne);
+ in10 = _mm_add_epi16(in10, kOne);
+ in11 = _mm_add_epi16(in11, kOne);
+ in12 = _mm_add_epi16(in12, kOne);
+ in13 = _mm_add_epi16(in13, kOne);
+ in14 = _mm_add_epi16(in14, kOne);
+ in15 = _mm_add_epi16(in15, kOne);
+ in00 = _mm_srai_epi16(in00, 2);
+ in01 = _mm_srai_epi16(in01, 2);
+ in02 = _mm_srai_epi16(in02, 2);
+ in03 = _mm_srai_epi16(in03, 2);
+ in04 = _mm_srai_epi16(in04, 2);
+ in05 = _mm_srai_epi16(in05, 2);
+ in06 = _mm_srai_epi16(in06, 2);
+ in07 = _mm_srai_epi16(in07, 2);
+ in08 = _mm_srai_epi16(in08, 2);
+ in09 = _mm_srai_epi16(in09, 2);
+ in10 = _mm_srai_epi16(in10, 2);
+ in11 = _mm_srai_epi16(in11, 2);
+ in12 = _mm_srai_epi16(in12, 2);
+ in13 = _mm_srai_epi16(in13, 2);
+ in14 = _mm_srai_epi16(in14, 2);
+ in15 = _mm_srai_epi16(in15, 2);
+ }
+ in += 8;
+ // Calculate input for the first 8 results.
+ {+ input0 = _mm_add_epi16(in00, in15);
+ input1 = _mm_add_epi16(in01, in14);
+ input2 = _mm_add_epi16(in02, in13);
+ input3 = _mm_add_epi16(in03, in12);
+ input4 = _mm_add_epi16(in04, in11);
+ input5 = _mm_add_epi16(in05, in10);
+ input6 = _mm_add_epi16(in06, in09);
+ input7 = _mm_add_epi16(in07, in08);
+ }
+ // Calculate input for the next 8 results.
+ {+ step1_0 = _mm_sub_epi16(in07, in08);
+ step1_1 = _mm_sub_epi16(in06, in09);
+ step1_2 = _mm_sub_epi16(in05, in10);
+ step1_3 = _mm_sub_epi16(in04, in11);
+ step1_4 = _mm_sub_epi16(in03, in12);
+ step1_5 = _mm_sub_epi16(in02, in13);
+ step1_6 = _mm_sub_epi16(in01, in14);
+ step1_7 = _mm_sub_epi16(in00, in15);
+ }
+ // Work on the first eight values; fdct8_1d(input, even_results);
+ {+ // Add/substract
+ const __m128i q0 = _mm_add_epi16(input0, input7);
+ const __m128i q1 = _mm_add_epi16(input1, input6);
+ const __m128i q2 = _mm_add_epi16(input2, input5);
+ const __m128i q3 = _mm_add_epi16(input3, input4);
+ const __m128i q4 = _mm_sub_epi16(input3, input4);
+ const __m128i q5 = _mm_sub_epi16(input2, input5);
+ const __m128i q6 = _mm_sub_epi16(input1, input6);
+ const __m128i q7 = _mm_sub_epi16(input0, input7);
+ // Work on first four results
+ {+ // Add/substract
+ const __m128i r0 = _mm_add_epi16(q0, q3);
+ const __m128i r1 = _mm_add_epi16(q1, q2);
+ const __m128i r2 = _mm_sub_epi16(q1, q2);
+ const __m128i r3 = _mm_sub_epi16(q0, q3);
+ // Interleave to do the multiply by constants which gets us
+ // into 32 bits.
+ const __m128i t0 = _mm_unpacklo_epi16(r0, r1);
+ const __m128i t1 = _mm_unpackhi_epi16(r0, r1);
+ const __m128i t2 = _mm_unpacklo_epi16(r2, r3);
+ const __m128i t3 = _mm_unpackhi_epi16(r2, r3);
+ const __m128i u0 = _mm_madd_epi16(t0, k__cospi_p16_p16);
+ const __m128i u1 = _mm_madd_epi16(t1, k__cospi_p16_p16);
+ const __m128i u2 = _mm_madd_epi16(t0, k__cospi_p16_m16);
+ const __m128i u3 = _mm_madd_epi16(t1, k__cospi_p16_m16);
+ const __m128i u4 = _mm_madd_epi16(t2, k__cospi_p24_p08);
+ const __m128i u5 = _mm_madd_epi16(t3, k__cospi_p24_p08);
+ const __m128i u6 = _mm_madd_epi16(t2, k__cospi_m08_p24);
+ const __m128i u7 = _mm_madd_epi16(t3, k__cospi_m08_p24);
+ // dct_const_round_shift
+ const __m128i v0 = _mm_add_epi32(u0, k__DCT_CONST_ROUNDING);
+ const __m128i v1 = _mm_add_epi32(u1, k__DCT_CONST_ROUNDING);
+ const __m128i v2 = _mm_add_epi32(u2, k__DCT_CONST_ROUNDING);
+ const __m128i v3 = _mm_add_epi32(u3, k__DCT_CONST_ROUNDING);
+ const __m128i v4 = _mm_add_epi32(u4, k__DCT_CONST_ROUNDING);
+ const __m128i v5 = _mm_add_epi32(u5, k__DCT_CONST_ROUNDING);
+ const __m128i v6 = _mm_add_epi32(u6, k__DCT_CONST_ROUNDING);
+ const __m128i v7 = _mm_add_epi32(u7, k__DCT_CONST_ROUNDING);
+ const __m128i w0 = _mm_srai_epi32(v0, DCT_CONST_BITS);
+ const __m128i w1 = _mm_srai_epi32(v1, DCT_CONST_BITS);
+ const __m128i w2 = _mm_srai_epi32(v2, DCT_CONST_BITS);
+ const __m128i w3 = _mm_srai_epi32(v3, DCT_CONST_BITS);
+ const __m128i w4 = _mm_srai_epi32(v4, DCT_CONST_BITS);
+ const __m128i w5 = _mm_srai_epi32(v5, DCT_CONST_BITS);
+ const __m128i w6 = _mm_srai_epi32(v6, DCT_CONST_BITS);
+ const __m128i w7 = _mm_srai_epi32(v7, DCT_CONST_BITS);
+ // Combine
+ res00 = _mm_packs_epi32(w0, w1);
+ res08 = _mm_packs_epi32(w2, w3);
+ res04 = _mm_packs_epi32(w4, w5);
+ res12 = _mm_packs_epi32(w6, w7);
+ }
+ // Work on next four results
+ {+ // Interleave to do the multiply by constants which gets us
+ // into 32 bits.
+ const __m128i d0 = _mm_unpacklo_epi16(q6, q5);
+ const __m128i d1 = _mm_unpackhi_epi16(q6, q5);
+ const __m128i e0 = _mm_madd_epi16(d0, k__cospi_p16_m16);
+ const __m128i e1 = _mm_madd_epi16(d1, k__cospi_p16_m16);
+ const __m128i e2 = _mm_madd_epi16(d0, k__cospi_p16_p16);
+ const __m128i e3 = _mm_madd_epi16(d1, k__cospi_p16_p16);
+ // dct_const_round_shift
+ const __m128i f0 = _mm_add_epi32(e0, k__DCT_CONST_ROUNDING);
+ const __m128i f1 = _mm_add_epi32(e1, k__DCT_CONST_ROUNDING);
+ const __m128i f2 = _mm_add_epi32(e2, k__DCT_CONST_ROUNDING);
+ const __m128i f3 = _mm_add_epi32(e3, k__DCT_CONST_ROUNDING);
+ const __m128i s0 = _mm_srai_epi32(f0, DCT_CONST_BITS);
+ const __m128i s1 = _mm_srai_epi32(f1, DCT_CONST_BITS);
+ const __m128i s2 = _mm_srai_epi32(f2, DCT_CONST_BITS);
+ const __m128i s3 = _mm_srai_epi32(f3, DCT_CONST_BITS);
+ // Combine
+ const __m128i r0 = _mm_packs_epi32(s0, s1);
+ const __m128i r1 = _mm_packs_epi32(s2, s3);
+ // Add/substract
+ const __m128i x0 = _mm_add_epi16(q4, r0);
+ const __m128i x1 = _mm_sub_epi16(q4, r0);
+ const __m128i x2 = _mm_sub_epi16(q7, r1);
+ const __m128i x3 = _mm_add_epi16(q7, r1);
+ // Interleave to do the multiply by constants which gets us
+ // into 32 bits.
+ const __m128i t0 = _mm_unpacklo_epi16(x0, x3);
+ const __m128i t1 = _mm_unpackhi_epi16(x0, x3);
+ const __m128i t2 = _mm_unpacklo_epi16(x1, x2);
+ const __m128i t3 = _mm_unpackhi_epi16(x1, x2);
+ const __m128i u0 = _mm_madd_epi16(t0, k__cospi_p28_p04);
+ const __m128i u1 = _mm_madd_epi16(t1, k__cospi_p28_p04);
+ const __m128i u2 = _mm_madd_epi16(t0, k__cospi_m04_p28);
+ const __m128i u3 = _mm_madd_epi16(t1, k__cospi_m04_p28);
+ const __m128i u4 = _mm_madd_epi16(t2, k__cospi_p12_p20);
+ const __m128i u5 = _mm_madd_epi16(t3, k__cospi_p12_p20);
+ const __m128i u6 = _mm_madd_epi16(t2, k__cospi_m20_p12);
+ const __m128i u7 = _mm_madd_epi16(t3, k__cospi_m20_p12);
+ // dct_const_round_shift
+ const __m128i v0 = _mm_add_epi32(u0, k__DCT_CONST_ROUNDING);
+ const __m128i v1 = _mm_add_epi32(u1, k__DCT_CONST_ROUNDING);
+ const __m128i v2 = _mm_add_epi32(u2, k__DCT_CONST_ROUNDING);
+ const __m128i v3 = _mm_add_epi32(u3, k__DCT_CONST_ROUNDING);
+ const __m128i v4 = _mm_add_epi32(u4, k__DCT_CONST_ROUNDING);
+ const __m128i v5 = _mm_add_epi32(u5, k__DCT_CONST_ROUNDING);
+ const __m128i v6 = _mm_add_epi32(u6, k__DCT_CONST_ROUNDING);
+ const __m128i v7 = _mm_add_epi32(u7, k__DCT_CONST_ROUNDING);
+ const __m128i w0 = _mm_srai_epi32(v0, DCT_CONST_BITS);
+ const __m128i w1 = _mm_srai_epi32(v1, DCT_CONST_BITS);
+ const __m128i w2 = _mm_srai_epi32(v2, DCT_CONST_BITS);
+ const __m128i w3 = _mm_srai_epi32(v3, DCT_CONST_BITS);
+ const __m128i w4 = _mm_srai_epi32(v4, DCT_CONST_BITS);
+ const __m128i w5 = _mm_srai_epi32(v5, DCT_CONST_BITS);
+ const __m128i w6 = _mm_srai_epi32(v6, DCT_CONST_BITS);
+ const __m128i w7 = _mm_srai_epi32(v7, DCT_CONST_BITS);
+ // Combine
+ res02 = _mm_packs_epi32(w0, w1);
+ res14 = _mm_packs_epi32(w2, w3);
+ res10 = _mm_packs_epi32(w4, w5);
+ res06 = _mm_packs_epi32(w6, w7);
+ }
+ }
+ // Work on the next eight values; step1 -> odd_results
+ {+ // step 2
+ {+ const __m128i t0 = _mm_unpacklo_epi16(step1_5, step1_2);
+ const __m128i t1 = _mm_unpackhi_epi16(step1_5, step1_2);
+ const __m128i t2 = _mm_unpacklo_epi16(step1_4, step1_3);
+ const __m128i t3 = _mm_unpackhi_epi16(step1_4, step1_3);
+ const __m128i u0 = _mm_madd_epi16(t0, k__cospi_p16_m16);
+ const __m128i u1 = _mm_madd_epi16(t1, k__cospi_p16_m16);
+ const __m128i u2 = _mm_madd_epi16(t2, k__cospi_p16_m16);
+ const __m128i u3 = _mm_madd_epi16(t3, k__cospi_p16_m16);
+ // dct_const_round_shift
+ const __m128i v0 = _mm_add_epi32(u0, k__DCT_CONST_ROUNDING);
+ const __m128i v1 = _mm_add_epi32(u1, k__DCT_CONST_ROUNDING);
+ const __m128i v2 = _mm_add_epi32(u2, k__DCT_CONST_ROUNDING);
+ const __m128i v3 = _mm_add_epi32(u3, k__DCT_CONST_ROUNDING);
+ const __m128i w0 = _mm_srai_epi32(v0, DCT_CONST_BITS);
+ const __m128i w1 = _mm_srai_epi32(v1, DCT_CONST_BITS);
+ const __m128i w2 = _mm_srai_epi32(v2, DCT_CONST_BITS);
+ const __m128i w3 = _mm_srai_epi32(v3, DCT_CONST_BITS);
+ // Combine
+ step2_2 = _mm_packs_epi32(w0, w1);
+ step2_3 = _mm_packs_epi32(w2, w3);
+ }
+ {+ const __m128i t0 = _mm_unpacklo_epi16(step1_5, step1_2);
+ const __m128i t1 = _mm_unpackhi_epi16(step1_5, step1_2);
+ const __m128i t2 = _mm_unpacklo_epi16(step1_4, step1_3);
+ const __m128i t3 = _mm_unpackhi_epi16(step1_4, step1_3);
+ const __m128i u0 = _mm_madd_epi16(t0, k__cospi_p16_p16);
+ const __m128i u1 = _mm_madd_epi16(t1, k__cospi_p16_p16);
+ const __m128i u2 = _mm_madd_epi16(t2, k__cospi_p16_p16);
+ const __m128i u3 = _mm_madd_epi16(t3, k__cospi_p16_p16);
+ // dct_const_round_shift
+ const __m128i v0 = _mm_add_epi32(u0, k__DCT_CONST_ROUNDING);
+ const __m128i v1 = _mm_add_epi32(u1, k__DCT_CONST_ROUNDING);
+ const __m128i v2 = _mm_add_epi32(u2, k__DCT_CONST_ROUNDING);
+ const __m128i v3 = _mm_add_epi32(u3, k__DCT_CONST_ROUNDING);
+ const __m128i w0 = _mm_srai_epi32(v0, DCT_CONST_BITS);
+ const __m128i w1 = _mm_srai_epi32(v1, DCT_CONST_BITS);
+ const __m128i w2 = _mm_srai_epi32(v2, DCT_CONST_BITS);
+ const __m128i w3 = _mm_srai_epi32(v3, DCT_CONST_BITS);
+ // Combine
+ step2_5 = _mm_packs_epi32(w0, w1);
+ step2_4 = _mm_packs_epi32(w2, w3);
+ }
+ // step 3
+ {+ step3_0 = _mm_add_epi16(step1_0, step2_3);
+ step3_1 = _mm_add_epi16(step1_1, step2_2);
+ step3_2 = _mm_sub_epi16(step1_1, step2_2);
+ step3_3 = _mm_sub_epi16(step1_0, step2_3);
+ step3_4 = _mm_sub_epi16(step1_7, step2_4);
+ step3_5 = _mm_sub_epi16(step1_6, step2_5);
+ step3_6 = _mm_add_epi16(step1_6, step2_5);
+ step3_7 = _mm_add_epi16(step1_7, step2_4);
+ }
+ // step 4
+ {+ const __m128i t0 = _mm_unpacklo_epi16(step3_1, step3_6);
+ const __m128i t1 = _mm_unpackhi_epi16(step3_1, step3_6);
+ const __m128i t2 = _mm_unpacklo_epi16(step3_2, step3_5);
+ const __m128i t3 = _mm_unpackhi_epi16(step3_2, step3_5);
+ const __m128i u0 = _mm_madd_epi16(t0, k__cospi_m08_p24);
+ const __m128i u1 = _mm_madd_epi16(t1, k__cospi_m08_p24);
+ const __m128i u2 = _mm_madd_epi16(t2, k__cospi_m24_m08);
+ const __m128i u3 = _mm_madd_epi16(t3, k__cospi_m24_m08);
+ // dct_const_round_shift
+ const __m128i v0 = _mm_add_epi32(u0, k__DCT_CONST_ROUNDING);
+ const __m128i v1 = _mm_add_epi32(u1, k__DCT_CONST_ROUNDING);
+ const __m128i v2 = _mm_add_epi32(u2, k__DCT_CONST_ROUNDING);
+ const __m128i v3 = _mm_add_epi32(u3, k__DCT_CONST_ROUNDING);
+ const __m128i w0 = _mm_srai_epi32(v0, DCT_CONST_BITS);
+ const __m128i w1 = _mm_srai_epi32(v1, DCT_CONST_BITS);
+ const __m128i w2 = _mm_srai_epi32(v2, DCT_CONST_BITS);
+ const __m128i w3 = _mm_srai_epi32(v3, DCT_CONST_BITS);
+ // Combine
+ step2_1 = _mm_packs_epi32(w0, w1);
+ step2_2 = _mm_packs_epi32(w2, w3);
+ }
+ {+ const __m128i t0 = _mm_unpacklo_epi16(step3_1, step3_6);
+ const __m128i t1 = _mm_unpackhi_epi16(step3_1, step3_6);
+ const __m128i t2 = _mm_unpacklo_epi16(step3_2, step3_5);
+ const __m128i t3 = _mm_unpackhi_epi16(step3_2, step3_5);
+ const __m128i u0 = _mm_madd_epi16(t0, k__cospi_p24_p08);
+ const __m128i u1 = _mm_madd_epi16(t1, k__cospi_p24_p08);
+ const __m128i u2 = _mm_madd_epi16(t2, k__cospi_m08_p24);
+ const __m128i u3 = _mm_madd_epi16(t3, k__cospi_m08_p24);
+ // dct_const_round_shift
+ const __m128i v0 = _mm_add_epi32(u0, k__DCT_CONST_ROUNDING);
+ const __m128i v1 = _mm_add_epi32(u1, k__DCT_CONST_ROUNDING);
+ const __m128i v2 = _mm_add_epi32(u2, k__DCT_CONST_ROUNDING);
+ const __m128i v3 = _mm_add_epi32(u3, k__DCT_CONST_ROUNDING);
+ const __m128i w0 = _mm_srai_epi32(v0, DCT_CONST_BITS);
+ const __m128i w1 = _mm_srai_epi32(v1, DCT_CONST_BITS);
+ const __m128i w2 = _mm_srai_epi32(v2, DCT_CONST_BITS);
+ const __m128i w3 = _mm_srai_epi32(v3, DCT_CONST_BITS);
+ // Combine
+ step2_6 = _mm_packs_epi32(w0, w1);
+ step2_5 = _mm_packs_epi32(w2, w3);
+ }
+ // step 5
+ {+ step1_0 = _mm_add_epi16(step3_0, step2_1);
+ step1_1 = _mm_sub_epi16(step3_0, step2_1);
+ step1_2 = _mm_sub_epi16(step3_3, step2_2);
+ step1_3 = _mm_add_epi16(step3_3, step2_2);
+ step1_4 = _mm_add_epi16(step3_4, step2_5);
+ step1_5 = _mm_sub_epi16(step3_4, step2_5);
+ step1_6 = _mm_sub_epi16(step3_7, step2_6);
+ step1_7 = _mm_add_epi16(step3_7, step2_6);
+ }
+ // step 6
+ {+ const __m128i t0 = _mm_unpacklo_epi16(step1_0, step1_7);
+ const __m128i t1 = _mm_unpackhi_epi16(step1_0, step1_7);
+ const __m128i t2 = _mm_unpacklo_epi16(step1_1, step1_6);
+ const __m128i t3 = _mm_unpackhi_epi16(step1_1, step1_6);
+ const __m128i u0 = _mm_madd_epi16(t0, k__cospi_p30_p02);
+ const __m128i u1 = _mm_madd_epi16(t1, k__cospi_p30_p02);
+ const __m128i u2 = _mm_madd_epi16(t2, k__cospi_p14_p18);
+ const __m128i u3 = _mm_madd_epi16(t3, k__cospi_p14_p18);
+ // dct_const_round_shift
+ const __m128i v0 = _mm_add_epi32(u0, k__DCT_CONST_ROUNDING);
+ const __m128i v1 = _mm_add_epi32(u1, k__DCT_CONST_ROUNDING);
+ const __m128i v2 = _mm_add_epi32(u2, k__DCT_CONST_ROUNDING);
+ const __m128i v3 = _mm_add_epi32(u3, k__DCT_CONST_ROUNDING);
+ const __m128i w0 = _mm_srai_epi32(v0, DCT_CONST_BITS);
+ const __m128i w1 = _mm_srai_epi32(v1, DCT_CONST_BITS);
+ const __m128i w2 = _mm_srai_epi32(v2, DCT_CONST_BITS);
+ const __m128i w3 = _mm_srai_epi32(v3, DCT_CONST_BITS);
+ // Combine
+ res01 = _mm_packs_epi32(w0, w1);
+ res09 = _mm_packs_epi32(w2, w3);
+ }
+ {+ const __m128i t0 = _mm_unpacklo_epi16(step1_2, step1_5);
+ const __m128i t1 = _mm_unpackhi_epi16(step1_2, step1_5);
+ const __m128i t2 = _mm_unpacklo_epi16(step1_3, step1_4);
+ const __m128i t3 = _mm_unpackhi_epi16(step1_3, step1_4);
+ const __m128i u0 = _mm_madd_epi16(t0, k__cospi_p22_p10);
+ const __m128i u1 = _mm_madd_epi16(t1, k__cospi_p22_p10);
+ const __m128i u2 = _mm_madd_epi16(t2, k__cospi_p06_p26);
+ const __m128i u3 = _mm_madd_epi16(t3, k__cospi_p06_p26);
+ // dct_const_round_shift
+ const __m128i v0 = _mm_add_epi32(u0, k__DCT_CONST_ROUNDING);
+ const __m128i v1 = _mm_add_epi32(u1, k__DCT_CONST_ROUNDING);
+ const __m128i v2 = _mm_add_epi32(u2, k__DCT_CONST_ROUNDING);
+ const __m128i v3 = _mm_add_epi32(u3, k__DCT_CONST_ROUNDING);
+ const __m128i w0 = _mm_srai_epi32(v0, DCT_CONST_BITS);
+ const __m128i w1 = _mm_srai_epi32(v1, DCT_CONST_BITS);
+ const __m128i w2 = _mm_srai_epi32(v2, DCT_CONST_BITS);
+ const __m128i w3 = _mm_srai_epi32(v3, DCT_CONST_BITS);
+ // Combine
+ res05 = _mm_packs_epi32(w0, w1);
+ res13 = _mm_packs_epi32(w2, w3);
+ }
+ {+ const __m128i t0 = _mm_unpacklo_epi16(step1_2, step1_5);
+ const __m128i t1 = _mm_unpackhi_epi16(step1_2, step1_5);
+ const __m128i t2 = _mm_unpacklo_epi16(step1_3, step1_4);
+ const __m128i t3 = _mm_unpackhi_epi16(step1_3, step1_4);
+ const __m128i u0 = _mm_madd_epi16(t0, k__cospi_m10_p22);
+ const __m128i u1 = _mm_madd_epi16(t1, k__cospi_m10_p22);
+ const __m128i u2 = _mm_madd_epi16(t2, k__cospi_m26_p06);
+ const __m128i u3 = _mm_madd_epi16(t3, k__cospi_m26_p06);
+ // dct_const_round_shift
+ const __m128i v0 = _mm_add_epi32(u0, k__DCT_CONST_ROUNDING);
+ const __m128i v1 = _mm_add_epi32(u1, k__DCT_CONST_ROUNDING);
+ const __m128i v2 = _mm_add_epi32(u2, k__DCT_CONST_ROUNDING);
+ const __m128i v3 = _mm_add_epi32(u3, k__DCT_CONST_ROUNDING);
+ const __m128i w0 = _mm_srai_epi32(v0, DCT_CONST_BITS);
+ const __m128i w1 = _mm_srai_epi32(v1, DCT_CONST_BITS);
+ const __m128i w2 = _mm_srai_epi32(v2, DCT_CONST_BITS);
+ const __m128i w3 = _mm_srai_epi32(v3, DCT_CONST_BITS);
+ // Combine
+ res11 = _mm_packs_epi32(w0, w1);
+ res03 = _mm_packs_epi32(w2, w3);
+ }
+ {+ const __m128i t0 = _mm_unpacklo_epi16(step1_0, step1_7);
+ const __m128i t1 = _mm_unpackhi_epi16(step1_0, step1_7);
+ const __m128i t2 = _mm_unpacklo_epi16(step1_1, step1_6);
+ const __m128i t3 = _mm_unpackhi_epi16(step1_1, step1_6);
+ const __m128i u0 = _mm_madd_epi16(t0, k__cospi_m02_p30);
+ const __m128i u1 = _mm_madd_epi16(t1, k__cospi_m02_p30);
+ const __m128i u2 = _mm_madd_epi16(t2, k__cospi_m18_p14);
+ const __m128i u3 = _mm_madd_epi16(t3, k__cospi_m18_p14);
+ // dct_const_round_shift
+ const __m128i v0 = _mm_add_epi32(u0, k__DCT_CONST_ROUNDING);
+ const __m128i v1 = _mm_add_epi32(u1, k__DCT_CONST_ROUNDING);
+ const __m128i v2 = _mm_add_epi32(u2, k__DCT_CONST_ROUNDING);
+ const __m128i v3 = _mm_add_epi32(u3, k__DCT_CONST_ROUNDING);
+ const __m128i w0 = _mm_srai_epi32(v0, DCT_CONST_BITS);
+ const __m128i w1 = _mm_srai_epi32(v1, DCT_CONST_BITS);
+ const __m128i w2 = _mm_srai_epi32(v2, DCT_CONST_BITS);
+ const __m128i w3 = _mm_srai_epi32(v3, DCT_CONST_BITS);
+ // Combine
+ res15 = _mm_packs_epi32(w0, w1);
+ res07 = _mm_packs_epi32(w2, w3);
+ }
+ }
+ // Transpose the results, do it as two 8x8 transposes.
+ {+ // 00 01 02 03 04 05 06 07
+ // 10 11 12 13 14 15 16 17
+ // 20 21 22 23 24 25 26 27
+ // 30 31 32 33 34 35 36 37
+ // 40 41 42 43 44 45 46 47
+ // 50 51 52 53 54 55 56 57
+ // 60 61 62 63 64 65 66 67
+ // 70 71 72 73 74 75 76 77
+ const __m128i tr0_0 = _mm_unpacklo_epi16(res00, res01);
+ const __m128i tr0_1 = _mm_unpacklo_epi16(res02, res03);
+ const __m128i tr0_2 = _mm_unpackhi_epi16(res00, res01);
+ const __m128i tr0_3 = _mm_unpackhi_epi16(res02, res03);
+ const __m128i tr0_4 = _mm_unpacklo_epi16(res04, res05);
+ const __m128i tr0_5 = _mm_unpacklo_epi16(res06, res07);
+ const __m128i tr0_6 = _mm_unpackhi_epi16(res04, res05);
+ const __m128i tr0_7 = _mm_unpackhi_epi16(res06, res07);
+ // 00 10 01 11 02 12 03 13
+ // 20 30 21 31 22 32 23 33
+ // 04 14 05 15 06 16 07 17
+ // 24 34 25 35 26 36 27 37
+ // 40 50 41 51 42 52 43 53
+ // 60 70 61 71 62 72 63 73
+ // 54 54 55 55 56 56 57 57
+ // 64 74 65 75 66 76 67 77
+ const __m128i tr1_0 = _mm_unpacklo_epi32(tr0_0, tr0_1);
+ const __m128i tr1_1 = _mm_unpacklo_epi32(tr0_2, tr0_3);
+ const __m128i tr1_2 = _mm_unpackhi_epi32(tr0_0, tr0_1);
+ const __m128i tr1_3 = _mm_unpackhi_epi32(tr0_2, tr0_3);
+ const __m128i tr1_4 = _mm_unpacklo_epi32(tr0_4, tr0_5);
+ const __m128i tr1_5 = _mm_unpacklo_epi32(tr0_6, tr0_7);
+ const __m128i tr1_6 = _mm_unpackhi_epi32(tr0_4, tr0_5);
+ const __m128i tr1_7 = _mm_unpackhi_epi32(tr0_6, tr0_7);
+ // 00 10 20 30 01 11 21 31
+ // 40 50 60 70 41 51 61 71
+ // 02 12 22 32 03 13 23 33
+ // 42 52 62 72 43 53 63 73
+ // 04 14 24 34 05 15 21 36
+ // 44 54 64 74 45 55 61 76
+ // 06 16 26 36 07 17 27 37
+ // 46 56 66 76 47 57 67 77
+ const __m128i tr2_0 = _mm_unpacklo_epi64(tr1_0, tr1_4);
+ const __m128i tr2_1 = _mm_unpackhi_epi64(tr1_0, tr1_4);
+ const __m128i tr2_2 = _mm_unpacklo_epi64(tr1_2, tr1_6);
+ const __m128i tr2_3 = _mm_unpackhi_epi64(tr1_2, tr1_6);
+ const __m128i tr2_4 = _mm_unpacklo_epi64(tr1_1, tr1_5);
+ const __m128i tr2_5 = _mm_unpackhi_epi64(tr1_1, tr1_5);
+ const __m128i tr2_6 = _mm_unpacklo_epi64(tr1_3, tr1_7);
+ const __m128i tr2_7 = _mm_unpackhi_epi64(tr1_3, tr1_7);
+ // 00 10 20 30 40 50 60 70
+ // 01 11 21 31 41 51 61 71
+ // 02 12 22 32 42 52 62 72
+ // 03 13 23 33 43 53 63 73
+ // 04 14 24 34 44 54 64 74
+ // 05 15 25 35 45 55 65 75
+ // 06 16 26 36 46 56 66 76
+ // 07 17 27 37 47 57 67 77
+ _mm_storeu_si128((__m128i *)(out + 0 * 16), tr2_0);
+ _mm_storeu_si128((__m128i *)(out + 1 * 16), tr2_1);
+ _mm_storeu_si128((__m128i *)(out + 2 * 16), tr2_2);
+ _mm_storeu_si128((__m128i *)(out + 3 * 16), tr2_3);
+ _mm_storeu_si128((__m128i *)(out + 4 * 16), tr2_4);
+ _mm_storeu_si128((__m128i *)(out + 5 * 16), tr2_5);
+ _mm_storeu_si128((__m128i *)(out + 6 * 16), tr2_6);
+ _mm_storeu_si128((__m128i *)(out + 7 * 16), tr2_7);
+ }
+ {+ // 00 01 02 03 04 05 06 07
+ // 10 11 12 13 14 15 16 17
+ // 20 21 22 23 24 25 26 27
+ // 30 31 32 33 34 35 36 37
+ // 40 41 42 43 44 45 46 47
+ // 50 51 52 53 54 55 56 57
+ // 60 61 62 63 64 65 66 67
+ // 70 71 72 73 74 75 76 77
+ const __m128i tr0_0 = _mm_unpacklo_epi16(res08, res09);
+ const __m128i tr0_1 = _mm_unpacklo_epi16(res10, res11);
+ const __m128i tr0_2 = _mm_unpackhi_epi16(res08, res09);
+ const __m128i tr0_3 = _mm_unpackhi_epi16(res10, res11);
+ const __m128i tr0_4 = _mm_unpacklo_epi16(res12, res13);
+ const __m128i tr0_5 = _mm_unpacklo_epi16(res14, res15);
+ const __m128i tr0_6 = _mm_unpackhi_epi16(res12, res13);
+ const __m128i tr0_7 = _mm_unpackhi_epi16(res14, res15);
+ // 00 10 01 11 02 12 03 13
+ // 20 30 21 31 22 32 23 33
+ // 04 14 05 15 06 16 07 17
+ // 24 34 25 35 26 36 27 37
+ // 40 50 41 51 42 52 43 53
+ // 60 70 61 71 62 72 63 73
+ // 54 54 55 55 56 56 57 57
+ // 64 74 65 75 66 76 67 77
+ const __m128i tr1_0 = _mm_unpacklo_epi32(tr0_0, tr0_1);
+ const __m128i tr1_1 = _mm_unpacklo_epi32(tr0_2, tr0_3);
+ const __m128i tr1_2 = _mm_unpackhi_epi32(tr0_0, tr0_1);
+ const __m128i tr1_3 = _mm_unpackhi_epi32(tr0_2, tr0_3);
+ const __m128i tr1_4 = _mm_unpacklo_epi32(tr0_4, tr0_5);
+ const __m128i tr1_5 = _mm_unpacklo_epi32(tr0_6, tr0_7);
+ const __m128i tr1_6 = _mm_unpackhi_epi32(tr0_4, tr0_5);
+ const __m128i tr1_7 = _mm_unpackhi_epi32(tr0_6, tr0_7);
+ // 00 10 20 30 01 11 21 31
+ // 40 50 60 70 41 51 61 71
+ // 02 12 22 32 03 13 23 33
+ // 42 52 62 72 43 53 63 73
+ // 04 14 24 34 05 15 21 36
+ // 44 54 64 74 45 55 61 76
+ // 06 16 26 36 07 17 27 37
+ // 46 56 66 76 47 57 67 77
+ const __m128i tr2_0 = _mm_unpacklo_epi64(tr1_0, tr1_4);
+ const __m128i tr2_1 = _mm_unpackhi_epi64(tr1_0, tr1_4);
+ const __m128i tr2_2 = _mm_unpacklo_epi64(tr1_2, tr1_6);
+ const __m128i tr2_3 = _mm_unpackhi_epi64(tr1_2, tr1_6);
+ const __m128i tr2_4 = _mm_unpacklo_epi64(tr1_1, tr1_5);
+ const __m128i tr2_5 = _mm_unpackhi_epi64(tr1_1, tr1_5);
+ const __m128i tr2_6 = _mm_unpacklo_epi64(tr1_3, tr1_7);
+ const __m128i tr2_7 = _mm_unpackhi_epi64(tr1_3, tr1_7);
+ // 00 10 20 30 40 50 60 70
+ // 01 11 21 31 41 51 61 71
+ // 02 12 22 32 42 52 62 72
+ // 03 13 23 33 43 53 63 73
+ // 04 14 24 34 44 54 64 74
+ // 05 15 25 35 45 55 65 75
+ // 06 16 26 36 46 56 66 76
+ // 07 17 27 37 47 57 67 77
+ // Store results
+ _mm_store_si128((__m128i *)(out + 8 + 0 * 16), tr2_0);
+ _mm_store_si128((__m128i *)(out + 8 + 1 * 16), tr2_1);
+ _mm_store_si128((__m128i *)(out + 8 + 2 * 16), tr2_2);
+ _mm_store_si128((__m128i *)(out + 8 + 3 * 16), tr2_3);
+ _mm_store_si128((__m128i *)(out + 8 + 4 * 16), tr2_4);
+ _mm_store_si128((__m128i *)(out + 8 + 5 * 16), tr2_5);
+ _mm_store_si128((__m128i *)(out + 8 + 6 * 16), tr2_6);
+ _mm_store_si128((__m128i *)(out + 8 + 7 * 16), tr2_7);
+ }
+ out += 8*16;
+ }
+ // Setup in/out for next pass.
+ in = intermediate;
+ out = output;
+ }
+}
+
+static INLINE void load_buffer_16x16_avx2(const int16_t* input, __m128i *in0,
+ __m128i *in1, int stride) {+ // load first 8 columns
+ load_buffer_8x8_avx2(input, in0, stride);
+ load_buffer_8x8_avx2(input + 8 * stride, in0 + 8, stride);
+
+ input += 8;
+ // load second 8 columns
+ load_buffer_8x8_avx2(input, in1, stride);
+ load_buffer_8x8_avx2(input + 8 * stride, in1 + 8, stride);
+}
+
+static INLINE void write_buffer_16x16_avx2(int16_t *output, __m128i *in0,
+ __m128i *in1, int stride) {+ // write first 8 columns
+ write_buffer_8x8_avx2(output, in0, stride);
+ write_buffer_8x8_avx2(output + 8 * stride, in0 + 8, stride);
+ // write second 8 columns
+ output += 8;
+ write_buffer_8x8_avx2(output, in1, stride);
+ write_buffer_8x8_avx2(output + 8 * stride, in1 + 8, stride);
+}
+
+static INLINE void array_transpose_16x16_avx2(__m128i *res0, __m128i *res1) {+ __m128i tbuf[8];
+ array_transpose_8x8_avx2(res0, res0);
+ array_transpose_8x8_avx2(res1, tbuf);
+ array_transpose_8x8_avx2(res0 + 8, res1);
+ array_transpose_8x8_avx2(res1 + 8, res1 + 8);
+
+ res0[8] = tbuf[0];
+ res0[9] = tbuf[1];
+ res0[10] = tbuf[2];
+ res0[11] = tbuf[3];
+ res0[12] = tbuf[4];
+ res0[13] = tbuf[5];
+ res0[14] = tbuf[6];
+ res0[15] = tbuf[7];
+}
+
+static INLINE void right_shift_16x16_avx2(__m128i *res0, __m128i *res1) {+ // perform rounding operations
+ right_shift_8x8_avx2(res0, 2);
+ right_shift_8x8_avx2(res0 + 8, 2);
+ right_shift_8x8_avx2(res1, 2);
+ right_shift_8x8_avx2(res1 + 8, 2);
+}
+
+void fdct16_1d_8col_avx2(__m128i *in) {+ // perform 16x16 1-D DCT for 8 columns
+ __m128i i[8], s[8], p[8], t[8], u[16], v[16];
+ const __m128i k__cospi_p16_p16 = _mm_set1_epi16(cospi_16_64);
+ const __m128i k__cospi_p16_m16 = pair_set_epi16(cospi_16_64, -cospi_16_64);
+ const __m128i k__cospi_m16_p16 = pair_set_epi16(-cospi_16_64, cospi_16_64);
+ const __m128i k__cospi_p24_p08 = pair_set_epi16(cospi_24_64, cospi_8_64);
+ const __m128i k__cospi_m24_m08 = pair_set_epi16(-cospi_24_64, -cospi_8_64);
+ const __m128i k__cospi_m08_p24 = pair_set_epi16(-cospi_8_64, cospi_24_64);
+ const __m128i k__cospi_p28_p04 = pair_set_epi16(cospi_28_64, cospi_4_64);
+ const __m128i k__cospi_m04_p28 = pair_set_epi16(-cospi_4_64, cospi_28_64);
+ const __m128i k__cospi_p12_p20 = pair_set_epi16(cospi_12_64, cospi_20_64);
+ const __m128i k__cospi_m20_p12 = pair_set_epi16(-cospi_20_64, cospi_12_64);
+ const __m128i k__cospi_p30_p02 = pair_set_epi16(cospi_30_64, cospi_2_64);
+ const __m128i k__cospi_p14_p18 = pair_set_epi16(cospi_14_64, cospi_18_64);
+ const __m128i k__cospi_m02_p30 = pair_set_epi16(-cospi_2_64, cospi_30_64);
+ const __m128i k__cospi_m18_p14 = pair_set_epi16(-cospi_18_64, cospi_14_64);
+ const __m128i k__cospi_p22_p10 = pair_set_epi16(cospi_22_64, cospi_10_64);
+ const __m128i k__cospi_p06_p26 = pair_set_epi16(cospi_6_64, cospi_26_64);
+ const __m128i k__cospi_m10_p22 = pair_set_epi16(-cospi_10_64, cospi_22_64);
+ const __m128i k__cospi_m26_p06 = pair_set_epi16(-cospi_26_64, cospi_6_64);
+ const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);
+
+ // stage 1
+ i[0] = _mm_add_epi16(in[0], in[15]);
+ i[1] = _mm_add_epi16(in[1], in[14]);
+ i[2] = _mm_add_epi16(in[2], in[13]);
+ i[3] = _mm_add_epi16(in[3], in[12]);
+ i[4] = _mm_add_epi16(in[4], in[11]);
+ i[5] = _mm_add_epi16(in[5], in[10]);
+ i[6] = _mm_add_epi16(in[6], in[9]);
+ i[7] = _mm_add_epi16(in[7], in[8]);
+
+ s[0] = _mm_sub_epi16(in[7], in[8]);
+ s[1] = _mm_sub_epi16(in[6], in[9]);
+ s[2] = _mm_sub_epi16(in[5], in[10]);
+ s[3] = _mm_sub_epi16(in[4], in[11]);
+ s[4] = _mm_sub_epi16(in[3], in[12]);
+ s[5] = _mm_sub_epi16(in[2], in[13]);
+ s[6] = _mm_sub_epi16(in[1], in[14]);
+ s[7] = _mm_sub_epi16(in[0], in[15]);
+
+ p[0] = _mm_add_epi16(i[0], i[7]);
+ p[1] = _mm_add_epi16(i[1], i[6]);
+ p[2] = _mm_add_epi16(i[2], i[5]);
+ p[3] = _mm_add_epi16(i[3], i[4]);
+ p[4] = _mm_sub_epi16(i[3], i[4]);
+ p[5] = _mm_sub_epi16(i[2], i[5]);
+ p[6] = _mm_sub_epi16(i[1], i[6]);
+ p[7] = _mm_sub_epi16(i[0], i[7]);
+
+ u[0] = _mm_add_epi16(p[0], p[3]);
+ u[1] = _mm_add_epi16(p[1], p[2]);
+ u[2] = _mm_sub_epi16(p[1], p[2]);
+ u[3] = _mm_sub_epi16(p[0], p[3]);
+
+ v[0] = _mm_unpacklo_epi16(u[0], u[1]);
+ v[1] = _mm_unpackhi_epi16(u[0], u[1]);
+ v[2] = _mm_unpacklo_epi16(u[2], u[3]);
+ v[3] = _mm_unpackhi_epi16(u[2], u[3]);
+
+ u[0] = _mm_madd_epi16(v[0], k__cospi_p16_p16);
+ u[1] = _mm_madd_epi16(v[1], k__cospi_p16_p16);
+ u[2] = _mm_madd_epi16(v[0], k__cospi_p16_m16);
+ u[3] = _mm_madd_epi16(v[1], k__cospi_p16_m16);
+ u[4] = _mm_madd_epi16(v[2], k__cospi_p24_p08);
+ u[5] = _mm_madd_epi16(v[3], k__cospi_p24_p08);
+ u[6] = _mm_madd_epi16(v[2], k__cospi_m08_p24);
+ u[7] = _mm_madd_epi16(v[3], k__cospi_m08_p24);
+
+ v[0] = _mm_add_epi32(u[0], k__DCT_CONST_ROUNDING);
+ v[1] = _mm_add_epi32(u[1], k__DCT_CONST_ROUNDING);
+ v[2] = _mm_add_epi32(u[2], k__DCT_CONST_ROUNDING);
+ v[3] = _mm_add_epi32(u[3], k__DCT_CONST_ROUNDING);
+ v[4] = _mm_add_epi32(u[4], k__DCT_CONST_ROUNDING);
+ v[5] = _mm_add_epi32(u[5], k__DCT_CONST_ROUNDING);
+ v[6] = _mm_add_epi32(u[6], k__DCT_CONST_ROUNDING);
+ v[7] = _mm_add_epi32(u[7], k__DCT_CONST_ROUNDING);
+
+ u[0] = _mm_srai_epi32(v[0], DCT_CONST_BITS);
+ u[1] = _mm_srai_epi32(v[1], DCT_CONST_BITS);
+ u[2] = _mm_srai_epi32(v[2], DCT_CONST_BITS);
+ u[3] = _mm_srai_epi32(v[3], DCT_CONST_BITS);
+ u[4] = _mm_srai_epi32(v[4], DCT_CONST_BITS);
+ u[5] = _mm_srai_epi32(v[5], DCT_CONST_BITS);
+ u[6] = _mm_srai_epi32(v[6], DCT_CONST_BITS);
+ u[7] = _mm_srai_epi32(v[7], DCT_CONST_BITS);
+
+ in[0] = _mm_packs_epi32(u[0], u[1]);
+ in[4] = _mm_packs_epi32(u[4], u[5]);
+ in[8] = _mm_packs_epi32(u[2], u[3]);
+ in[12] = _mm_packs_epi32(u[6], u[7]);
+
+ u[0] = _mm_unpacklo_epi16(p[5], p[6]);
+ u[1] = _mm_unpackhi_epi16(p[5], p[6]);
+ v[0] = _mm_madd_epi16(u[0], k__cospi_m16_p16);
+ v[1] = _mm_madd_epi16(u[1], k__cospi_m16_p16);
+ v[2] = _mm_madd_epi16(u[0], k__cospi_p16_p16);
+ v[3] = _mm_madd_epi16(u[1], k__cospi_p16_p16);
+
+ u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);
+ u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);
+ u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);
+ u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);
+
+ v[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);
+ v[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);
+ v[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);
+ v[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);
+
+ u[0] = _mm_packs_epi32(v[0], v[1]);
+ u[1] = _mm_packs_epi32(v[2], v[3]);
+
+ t[0] = _mm_add_epi16(p[4], u[0]);
+ t[1] = _mm_sub_epi16(p[4], u[0]);
+ t[2] = _mm_sub_epi16(p[7], u[1]);
+ t[3] = _mm_add_epi16(p[7], u[1]);
+
+ u[0] = _mm_unpacklo_epi16(t[0], t[3]);
+ u[1] = _mm_unpackhi_epi16(t[0], t[3]);
+ u[2] = _mm_unpacklo_epi16(t[1], t[2]);
+ u[3] = _mm_unpackhi_epi16(t[1], t[2]);
+
+ v[0] = _mm_madd_epi16(u[0], k__cospi_p28_p04);
+ v[1] = _mm_madd_epi16(u[1], k__cospi_p28_p04);
+ v[2] = _mm_madd_epi16(u[2], k__cospi_p12_p20);
+ v[3] = _mm_madd_epi16(u[3], k__cospi_p12_p20);
+ v[4] = _mm_madd_epi16(u[2], k__cospi_m20_p12);
+ v[5] = _mm_madd_epi16(u[3], k__cospi_m20_p12);
+ v[6] = _mm_madd_epi16(u[0], k__cospi_m04_p28);
+ v[7] = _mm_madd_epi16(u[1], k__cospi_m04_p28);
+
+ u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);
+ u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);
+ u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);
+ u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);
+ u[4] = _mm_add_epi32(v[4], k__DCT_CONST_ROUNDING);
+ u[5] = _mm_add_epi32(v[5], k__DCT_CONST_ROUNDING);
+ u[6] = _mm_add_epi32(v[6], k__DCT_CONST_ROUNDING);
+ u[7] = _mm_add_epi32(v[7], k__DCT_CONST_ROUNDING);
+
+ v[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);
+ v[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);
+ v[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);
+ v[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);
+ v[4] = _mm_srai_epi32(u[4], DCT_CONST_BITS);
+ v[5] = _mm_srai_epi32(u[5], DCT_CONST_BITS);
+ v[6] = _mm_srai_epi32(u[6], DCT_CONST_BITS);
+ v[7] = _mm_srai_epi32(u[7], DCT_CONST_BITS);
+
+ in[2] = _mm_packs_epi32(v[0], v[1]);
+ in[6] = _mm_packs_epi32(v[4], v[5]);
+ in[10] = _mm_packs_epi32(v[2], v[3]);
+ in[14] = _mm_packs_epi32(v[6], v[7]);
+
+ // stage 2
+ u[0] = _mm_unpacklo_epi16(s[2], s[5]);
+ u[1] = _mm_unpackhi_epi16(s[2], s[5]);
+ u[2] = _mm_unpacklo_epi16(s[3], s[4]);
+ u[3] = _mm_unpackhi_epi16(s[3], s[4]);
+
+ v[0] = _mm_madd_epi16(u[0], k__cospi_m16_p16);
+ v[1] = _mm_madd_epi16(u[1], k__cospi_m16_p16);
+ v[2] = _mm_madd_epi16(u[2], k__cospi_m16_p16);
+ v[3] = _mm_madd_epi16(u[3], k__cospi_m16_p16);
+ v[4] = _mm_madd_epi16(u[2], k__cospi_p16_p16);
+ v[5] = _mm_madd_epi16(u[3], k__cospi_p16_p16);
+ v[6] = _mm_madd_epi16(u[0], k__cospi_p16_p16);
+ v[7] = _mm_madd_epi16(u[1], k__cospi_p16_p16);
+
+ u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);
+ u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);
+ u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);
+ u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);
+ u[4] = _mm_add_epi32(v[4], k__DCT_CONST_ROUNDING);
+ u[5] = _mm_add_epi32(v[5], k__DCT_CONST_ROUNDING);
+ u[6] = _mm_add_epi32(v[6], k__DCT_CONST_ROUNDING);
+ u[7] = _mm_add_epi32(v[7], k__DCT_CONST_ROUNDING);
+
+ v[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);
+ v[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);
+ v[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);
+ v[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);
+ v[4] = _mm_srai_epi32(u[4], DCT_CONST_BITS);
+ v[5] = _mm_srai_epi32(u[5], DCT_CONST_BITS);
+ v[6] = _mm_srai_epi32(u[6], DCT_CONST_BITS);
+ v[7] = _mm_srai_epi32(u[7], DCT_CONST_BITS);
+
+ t[2] = _mm_packs_epi32(v[0], v[1]);
+ t[3] = _mm_packs_epi32(v[2], v[3]);
+ t[4] = _mm_packs_epi32(v[4], v[5]);
+ t[5] = _mm_packs_epi32(v[6], v[7]);
+
+ // stage 3
+ p[0] = _mm_add_epi16(s[0], t[3]);
+ p[1] = _mm_add_epi16(s[1], t[2]);
+ p[2] = _mm_sub_epi16(s[1], t[2]);
+ p[3] = _mm_sub_epi16(s[0], t[3]);
+ p[4] = _mm_sub_epi16(s[7], t[4]);
+ p[5] = _mm_sub_epi16(s[6], t[5]);
+ p[6] = _mm_add_epi16(s[6], t[5]);
+ p[7] = _mm_add_epi16(s[7], t[4]);
+
+ // stage 4
+ u[0] = _mm_unpacklo_epi16(p[1], p[6]);
+ u[1] = _mm_unpackhi_epi16(p[1], p[6]);
+ u[2] = _mm_unpacklo_epi16(p[2], p[5]);
+ u[3] = _mm_unpackhi_epi16(p[2], p[5]);
+
+ v[0] = _mm_madd_epi16(u[0], k__cospi_m08_p24);
+ v[1] = _mm_madd_epi16(u[1], k__cospi_m08_p24);
+ v[2] = _mm_madd_epi16(u[2], k__cospi_m24_m08);
+ v[3] = _mm_madd_epi16(u[3], k__cospi_m24_m08);
+ v[4] = _mm_madd_epi16(u[2], k__cospi_m08_p24);
+ v[5] = _mm_madd_epi16(u[3], k__cospi_m08_p24);
+ v[6] = _mm_madd_epi16(u[0], k__cospi_p24_p08);
+ v[7] = _mm_madd_epi16(u[1], k__cospi_p24_p08);
+
+ u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);
+ u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);
+ u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);
+ u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);
+ u[4] = _mm_add_epi32(v[4], k__DCT_CONST_ROUNDING);
+ u[5] = _mm_add_epi32(v[5], k__DCT_CONST_ROUNDING);
+ u[6] = _mm_add_epi32(v[6], k__DCT_CONST_ROUNDING);
+ u[7] = _mm_add_epi32(v[7], k__DCT_CONST_ROUNDING);
+
+ v[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);
+ v[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);
+ v[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);
+ v[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);
+ v[4] = _mm_srai_epi32(u[4], DCT_CONST_BITS);
+ v[5] = _mm_srai_epi32(u[5], DCT_CONST_BITS);
+ v[6] = _mm_srai_epi32(u[6], DCT_CONST_BITS);
+ v[7] = _mm_srai_epi32(u[7], DCT_CONST_BITS);
+
+ t[1] = _mm_packs_epi32(v[0], v[1]);
+ t[2] = _mm_packs_epi32(v[2], v[3]);
+ t[5] = _mm_packs_epi32(v[4], v[5]);
+ t[6] = _mm_packs_epi32(v[6], v[7]);
+
+ // stage 5
+ s[0] = _mm_add_epi16(p[0], t[1]);
+ s[1] = _mm_sub_epi16(p[0], t[1]);
+ s[2] = _mm_sub_epi16(p[3], t[2]);
+ s[3] = _mm_add_epi16(p[3], t[2]);
+ s[4] = _mm_add_epi16(p[4], t[5]);
+ s[5] = _mm_sub_epi16(p[4], t[5]);
+ s[6] = _mm_sub_epi16(p[7], t[6]);
+ s[7] = _mm_add_epi16(p[7], t[6]);
+
+ // stage 6
+ u[0] = _mm_unpacklo_epi16(s[0], s[7]);
+ u[1] = _mm_unpackhi_epi16(s[0], s[7]);
+ u[2] = _mm_unpacklo_epi16(s[1], s[6]);
+ u[3] = _mm_unpackhi_epi16(s[1], s[6]);
+ u[4] = _mm_unpacklo_epi16(s[2], s[5]);
+ u[5] = _mm_unpackhi_epi16(s[2], s[5]);
+ u[6] = _mm_unpacklo_epi16(s[3], s[4]);
+ u[7] = _mm_unpackhi_epi16(s[3], s[4]);
+
+ v[0] = _mm_madd_epi16(u[0], k__cospi_p30_p02);
+ v[1] = _mm_madd_epi16(u[1], k__cospi_p30_p02);
+ v[2] = _mm_madd_epi16(u[2], k__cospi_p14_p18);
+ v[3] = _mm_madd_epi16(u[3], k__cospi_p14_p18);
+ v[4] = _mm_madd_epi16(u[4], k__cospi_p22_p10);
+ v[5] = _mm_madd_epi16(u[5], k__cospi_p22_p10);
+ v[6] = _mm_madd_epi16(u[6], k__cospi_p06_p26);
+ v[7] = _mm_madd_epi16(u[7], k__cospi_p06_p26);
+ v[8] = _mm_madd_epi16(u[6], k__cospi_m26_p06);
+ v[9] = _mm_madd_epi16(u[7], k__cospi_m26_p06);
+ v[10] = _mm_madd_epi16(u[4], k__cospi_m10_p22);
+ v[11] = _mm_madd_epi16(u[5], k__cospi_m10_p22);
+ v[12] = _mm_madd_epi16(u[2], k__cospi_m18_p14);
+ v[13] = _mm_madd_epi16(u[3], k__cospi_m18_p14);
+ v[14] = _mm_madd_epi16(u[0], k__cospi_m02_p30);
+ v[15] = _mm_madd_epi16(u[1], k__cospi_m02_p30);
+
+ u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);
+ u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);
+ u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);
+ u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);
+ u[4] = _mm_add_epi32(v[4], k__DCT_CONST_ROUNDING);
+ u[5] = _mm_add_epi32(v[5], k__DCT_CONST_ROUNDING);
+ u[6] = _mm_add_epi32(v[6], k__DCT_CONST_ROUNDING);
+ u[7] = _mm_add_epi32(v[7], k__DCT_CONST_ROUNDING);
+ u[8] = _mm_add_epi32(v[8], k__DCT_CONST_ROUNDING);
+ u[9] = _mm_add_epi32(v[9], k__DCT_CONST_ROUNDING);
+ u[10] = _mm_add_epi32(v[10], k__DCT_CONST_ROUNDING);
+ u[11] = _mm_add_epi32(v[11], k__DCT_CONST_ROUNDING);
+ u[12] = _mm_add_epi32(v[12], k__DCT_CONST_ROUNDING);
+ u[13] = _mm_add_epi32(v[13], k__DCT_CONST_ROUNDING);
+ u[14] = _mm_add_epi32(v[14], k__DCT_CONST_ROUNDING);
+ u[15] = _mm_add_epi32(v[15], k__DCT_CONST_ROUNDING);
+
+ v[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);
+ v[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);
+ v[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);
+ v[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);
+ v[4] = _mm_srai_epi32(u[4], DCT_CONST_BITS);
+ v[5] = _mm_srai_epi32(u[5], DCT_CONST_BITS);
+ v[6] = _mm_srai_epi32(u[6], DCT_CONST_BITS);
+ v[7] = _mm_srai_epi32(u[7], DCT_CONST_BITS);
+ v[8] = _mm_srai_epi32(u[8], DCT_CONST_BITS);
+ v[9] = _mm_srai_epi32(u[9], DCT_CONST_BITS);
+ v[10] = _mm_srai_epi32(u[10], DCT_CONST_BITS);
+ v[11] = _mm_srai_epi32(u[11], DCT_CONST_BITS);
+ v[12] = _mm_srai_epi32(u[12], DCT_CONST_BITS);
+ v[13] = _mm_srai_epi32(u[13], DCT_CONST_BITS);
+ v[14] = _mm_srai_epi32(u[14], DCT_CONST_BITS);
+ v[15] = _mm_srai_epi32(u[15], DCT_CONST_BITS);
+
+ in[1] = _mm_packs_epi32(v[0], v[1]);
+ in[9] = _mm_packs_epi32(v[2], v[3]);
+ in[5] = _mm_packs_epi32(v[4], v[5]);
+ in[13] = _mm_packs_epi32(v[6], v[7]);
+ in[3] = _mm_packs_epi32(v[8], v[9]);
+ in[11] = _mm_packs_epi32(v[10], v[11]);
+ in[7] = _mm_packs_epi32(v[12], v[13]);
+ in[15] = _mm_packs_epi32(v[14], v[15]);
+}
+
+void fadst16_1d_8col_avx2(__m128i *in) {+ // perform 16x16 1-D ADST for 8 columns
+ __m128i s[16], x[16], u[32], v[32];
+ const __m128i k__cospi_p01_p31 = pair_set_epi16(cospi_1_64, cospi_31_64);
+ const __m128i k__cospi_p31_m01 = pair_set_epi16(cospi_31_64, -cospi_1_64);
+ const __m128i k__cospi_p05_p27 = pair_set_epi16(cospi_5_64, cospi_27_64);
+ const __m128i k__cospi_p27_m05 = pair_set_epi16(cospi_27_64, -cospi_5_64);
+ const __m128i k__cospi_p09_p23 = pair_set_epi16(cospi_9_64, cospi_23_64);
+ const __m128i k__cospi_p23_m09 = pair_set_epi16(cospi_23_64, -cospi_9_64);
+ const __m128i k__cospi_p13_p19 = pair_set_epi16(cospi_13_64, cospi_19_64);
+ const __m128i k__cospi_p19_m13 = pair_set_epi16(cospi_19_64, -cospi_13_64);
+ const __m128i k__cospi_p17_p15 = pair_set_epi16(cospi_17_64, cospi_15_64);
+ const __m128i k__cospi_p15_m17 = pair_set_epi16(cospi_15_64, -cospi_17_64);
+ const __m128i k__cospi_p21_p11 = pair_set_epi16(cospi_21_64, cospi_11_64);
+ const __m128i k__cospi_p11_m21 = pair_set_epi16(cospi_11_64, -cospi_21_64);
+ const __m128i k__cospi_p25_p07 = pair_set_epi16(cospi_25_64, cospi_7_64);
+ const __m128i k__cospi_p07_m25 = pair_set_epi16(cospi_7_64, -cospi_25_64);
+ const __m128i k__cospi_p29_p03 = pair_set_epi16(cospi_29_64, cospi_3_64);
+ const __m128i k__cospi_p03_m29 = pair_set_epi16(cospi_3_64, -cospi_29_64);
+ const __m128i k__cospi_p04_p28 = pair_set_epi16(cospi_4_64, cospi_28_64);
+ const __m128i k__cospi_p28_m04 = pair_set_epi16(cospi_28_64, -cospi_4_64);
+ const __m128i k__cospi_p20_p12 = pair_set_epi16(cospi_20_64, cospi_12_64);
+ const __m128i k__cospi_p12_m20 = pair_set_epi16(cospi_12_64, -cospi_20_64);
+ const __m128i k__cospi_m28_p04 = pair_set_epi16(-cospi_28_64, cospi_4_64);
+ const __m128i k__cospi_m12_p20 = pair_set_epi16(-cospi_12_64, cospi_20_64);
+ const __m128i k__cospi_p08_p24 = pair_set_epi16(cospi_8_64, cospi_24_64);
+ const __m128i k__cospi_p24_m08 = pair_set_epi16(cospi_24_64, -cospi_8_64);
+ const __m128i k__cospi_m24_p08 = pair_set_epi16(-cospi_24_64, cospi_8_64);
+ const __m128i k__cospi_m16_m16 = _mm_set1_epi16(-cospi_16_64);
+ const __m128i k__cospi_p16_p16 = _mm_set1_epi16(cospi_16_64);
+ const __m128i k__cospi_p16_m16 = pair_set_epi16(cospi_16_64, -cospi_16_64);
+ const __m128i k__cospi_m16_p16 = pair_set_epi16(-cospi_16_64, cospi_16_64);
+ const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);
+ const __m128i kZero = _mm_set1_epi16(0);
+
+ u[0] = _mm_unpacklo_epi16(in[15], in[0]);
+ u[1] = _mm_unpackhi_epi16(in[15], in[0]);
+ u[2] = _mm_unpacklo_epi16(in[13], in[2]);
+ u[3] = _mm_unpackhi_epi16(in[13], in[2]);
+ u[4] = _mm_unpacklo_epi16(in[11], in[4]);
+ u[5] = _mm_unpackhi_epi16(in[11], in[4]);
+ u[6] = _mm_unpacklo_epi16(in[9], in[6]);
+ u[7] = _mm_unpackhi_epi16(in[9], in[6]);
+ u[8] = _mm_unpacklo_epi16(in[7], in[8]);
+ u[9] = _mm_unpackhi_epi16(in[7], in[8]);
+ u[10] = _mm_unpacklo_epi16(in[5], in[10]);
+ u[11] = _mm_unpackhi_epi16(in[5], in[10]);
+ u[12] = _mm_unpacklo_epi16(in[3], in[12]);
+ u[13] = _mm_unpackhi_epi16(in[3], in[12]);
+ u[14] = _mm_unpacklo_epi16(in[1], in[14]);
+ u[15] = _mm_unpackhi_epi16(in[1], in[14]);
+
+ v[0] = _mm_madd_epi16(u[0], k__cospi_p01_p31);
+ v[1] = _mm_madd_epi16(u[1], k__cospi_p01_p31);
+ v[2] = _mm_madd_epi16(u[0], k__cospi_p31_m01);
+ v[3] = _mm_madd_epi16(u[1], k__cospi_p31_m01);
+ v[4] = _mm_madd_epi16(u[2], k__cospi_p05_p27);
+ v[5] = _mm_madd_epi16(u[3], k__cospi_p05_p27);
+ v[6] = _mm_madd_epi16(u[2], k__cospi_p27_m05);
+ v[7] = _mm_madd_epi16(u[3], k__cospi_p27_m05);
+ v[8] = _mm_madd_epi16(u[4], k__cospi_p09_p23);
+ v[9] = _mm_madd_epi16(u[5], k__cospi_p09_p23);
+ v[10] = _mm_madd_epi16(u[4], k__cospi_p23_m09);
+ v[11] = _mm_madd_epi16(u[5], k__cospi_p23_m09);
+ v[12] = _mm_madd_epi16(u[6], k__cospi_p13_p19);
+ v[13] = _mm_madd_epi16(u[7], k__cospi_p13_p19);
+ v[14] = _mm_madd_epi16(u[6], k__cospi_p19_m13);
+ v[15] = _mm_madd_epi16(u[7], k__cospi_p19_m13);
+ v[16] = _mm_madd_epi16(u[8], k__cospi_p17_p15);
+ v[17] = _mm_madd_epi16(u[9], k__cospi_p17_p15);
+ v[18] = _mm_madd_epi16(u[8], k__cospi_p15_m17);
+ v[19] = _mm_madd_epi16(u[9], k__cospi_p15_m17);
+ v[20] = _mm_madd_epi16(u[10], k__cospi_p21_p11);
+ v[21] = _mm_madd_epi16(u[11], k__cospi_p21_p11);
+ v[22] = _mm_madd_epi16(u[10], k__cospi_p11_m21);
+ v[23] = _mm_madd_epi16(u[11], k__cospi_p11_m21);
+ v[24] = _mm_madd_epi16(u[12], k__cospi_p25_p07);
+ v[25] = _mm_madd_epi16(u[13], k__cospi_p25_p07);
+ v[26] = _mm_madd_epi16(u[12], k__cospi_p07_m25);
+ v[27] = _mm_madd_epi16(u[13], k__cospi_p07_m25);
+ v[28] = _mm_madd_epi16(u[14], k__cospi_p29_p03);
+ v[29] = _mm_madd_epi16(u[15], k__cospi_p29_p03);
+ v[30] = _mm_madd_epi16(u[14], k__cospi_p03_m29);
+ v[31] = _mm_madd_epi16(u[15], k__cospi_p03_m29);
+
+ u[0] = _mm_add_epi32(v[0], v[16]);
+ u[1] = _mm_add_epi32(v[1], v[17]);
+ u[2] = _mm_add_epi32(v[2], v[18]);
+ u[3] = _mm_add_epi32(v[3], v[19]);
+ u[4] = _mm_add_epi32(v[4], v[20]);
+ u[5] = _mm_add_epi32(v[5], v[21]);
+ u[6] = _mm_add_epi32(v[6], v[22]);
+ u[7] = _mm_add_epi32(v[7], v[23]);
+ u[8] = _mm_add_epi32(v[8], v[24]);
+ u[9] = _mm_add_epi32(v[9], v[25]);
+ u[10] = _mm_add_epi32(v[10], v[26]);
+ u[11] = _mm_add_epi32(v[11], v[27]);
+ u[12] = _mm_add_epi32(v[12], v[28]);
+ u[13] = _mm_add_epi32(v[13], v[29]);
+ u[14] = _mm_add_epi32(v[14], v[30]);
+ u[15] = _mm_add_epi32(v[15], v[31]);
+ u[16] = _mm_sub_epi32(v[0], v[16]);
+ u[17] = _mm_sub_epi32(v[1], v[17]);
+ u[18] = _mm_sub_epi32(v[2], v[18]);
+ u[19] = _mm_sub_epi32(v[3], v[19]);
+ u[20] = _mm_sub_epi32(v[4], v[20]);
+ u[21] = _mm_sub_epi32(v[5], v[21]);
+ u[22] = _mm_sub_epi32(v[6], v[22]);
+ u[23] = _mm_sub_epi32(v[7], v[23]);
+ u[24] = _mm_sub_epi32(v[8], v[24]);
+ u[25] = _mm_sub_epi32(v[9], v[25]);
+ u[26] = _mm_sub_epi32(v[10], v[26]);
+ u[27] = _mm_sub_epi32(v[11], v[27]);
+ u[28] = _mm_sub_epi32(v[12], v[28]);
+ u[29] = _mm_sub_epi32(v[13], v[29]);
+ u[30] = _mm_sub_epi32(v[14], v[30]);
+ u[31] = _mm_sub_epi32(v[15], v[31]);
+
+ v[0] = _mm_add_epi32(u[0], k__DCT_CONST_ROUNDING);
+ v[1] = _mm_add_epi32(u[1], k__DCT_CONST_ROUNDING);
+ v[2] = _mm_add_epi32(u[2], k__DCT_CONST_ROUNDING);
+ v[3] = _mm_add_epi32(u[3], k__DCT_CONST_ROUNDING);
+ v[4] = _mm_add_epi32(u[4], k__DCT_CONST_ROUNDING);
+ v[5] = _mm_add_epi32(u[5], k__DCT_CONST_ROUNDING);
+ v[6] = _mm_add_epi32(u[6], k__DCT_CONST_ROUNDING);
+ v[7] = _mm_add_epi32(u[7], k__DCT_CONST_ROUNDING);
+ v[8] = _mm_add_epi32(u[8], k__DCT_CONST_ROUNDING);
+ v[9] = _mm_add_epi32(u[9], k__DCT_CONST_ROUNDING);
+ v[10] = _mm_add_epi32(u[10], k__DCT_CONST_ROUNDING);
+ v[11] = _mm_add_epi32(u[11], k__DCT_CONST_ROUNDING);
+ v[12] = _mm_add_epi32(u[12], k__DCT_CONST_ROUNDING);
+ v[13] = _mm_add_epi32(u[13], k__DCT_CONST_ROUNDING);
+ v[14] = _mm_add_epi32(u[14], k__DCT_CONST_ROUNDING);
+ v[15] = _mm_add_epi32(u[15], k__DCT_CONST_ROUNDING);
+ v[16] = _mm_add_epi32(u[16], k__DCT_CONST_ROUNDING);
+ v[17] = _mm_add_epi32(u[17], k__DCT_CONST_ROUNDING);
+ v[18] = _mm_add_epi32(u[18], k__DCT_CONST_ROUNDING);
+ v[19] = _mm_add_epi32(u[19], k__DCT_CONST_ROUNDING);
+ v[20] = _mm_add_epi32(u[20], k__DCT_CONST_ROUNDING);
+ v[21] = _mm_add_epi32(u[21], k__DCT_CONST_ROUNDING);
+ v[22] = _mm_add_epi32(u[22], k__DCT_CONST_ROUNDING);
+ v[23] = _mm_add_epi32(u[23], k__DCT_CONST_ROUNDING);
+ v[24] = _mm_add_epi32(u[24], k__DCT_CONST_ROUNDING);
+ v[25] = _mm_add_epi32(u[25], k__DCT_CONST_ROUNDING);
+ v[26] = _mm_add_epi32(u[26], k__DCT_CONST_ROUNDING);
+ v[27] = _mm_add_epi32(u[27], k__DCT_CONST_ROUNDING);
+ v[28] = _mm_add_epi32(u[28], k__DCT_CONST_ROUNDING);
+ v[29] = _mm_add_epi32(u[29], k__DCT_CONST_ROUNDING);
+ v[30] = _mm_add_epi32(u[30], k__DCT_CONST_ROUNDING);
+ v[31] = _mm_add_epi32(u[31], k__DCT_CONST_ROUNDING);
+
+ u[0] = _mm_srai_epi32(v[0], DCT_CONST_BITS);
+ u[1] = _mm_srai_epi32(v[1], DCT_CONST_BITS);
+ u[2] = _mm_srai_epi32(v[2], DCT_CONST_BITS);
+ u[3] = _mm_srai_epi32(v[3], DCT_CONST_BITS);
+ u[4] = _mm_srai_epi32(v[4], DCT_CONST_BITS);
+ u[5] = _mm_srai_epi32(v[5], DCT_CONST_BITS);
+ u[6] = _mm_srai_epi32(v[6], DCT_CONST_BITS);
+ u[7] = _mm_srai_epi32(v[7], DCT_CONST_BITS);
+ u[8] = _mm_srai_epi32(v[8], DCT_CONST_BITS);
+ u[9] = _mm_srai_epi32(v[9], DCT_CONST_BITS);
+ u[10] = _mm_srai_epi32(v[10], DCT_CONST_BITS);
+ u[11] = _mm_srai_epi32(v[11], DCT_CONST_BITS);
+ u[12] = _mm_srai_epi32(v[12], DCT_CONST_BITS);
+ u[13] = _mm_srai_epi32(v[13], DCT_CONST_BITS);
+ u[14] = _mm_srai_epi32(v[14], DCT_CONST_BITS);
+ u[15] = _mm_srai_epi32(v[15], DCT_CONST_BITS);
+ u[16] = _mm_srai_epi32(v[16], DCT_CONST_BITS);
+ u[17] = _mm_srai_epi32(v[17], DCT_CONST_BITS);
+ u[18] = _mm_srai_epi32(v[18], DCT_CONST_BITS);
+ u[19] = _mm_srai_epi32(v[19], DCT_CONST_BITS);
+ u[20] = _mm_srai_epi32(v[20], DCT_CONST_BITS);
+ u[21] = _mm_srai_epi32(v[21], DCT_CONST_BITS);
+ u[22] = _mm_srai_epi32(v[22], DCT_CONST_BITS);
+ u[23] = _mm_srai_epi32(v[23], DCT_CONST_BITS);
+ u[24] = _mm_srai_epi32(v[24], DCT_CONST_BITS);
+ u[25] = _mm_srai_epi32(v[25], DCT_CONST_BITS);
+ u[26] = _mm_srai_epi32(v[26], DCT_CONST_BITS);
+ u[27] = _mm_srai_epi32(v[27], DCT_CONST_BITS);
+ u[28] = _mm_srai_epi32(v[28], DCT_CONST_BITS);
+ u[29] = _mm_srai_epi32(v[29], DCT_CONST_BITS);
+ u[30] = _mm_srai_epi32(v[30], DCT_CONST_BITS);
+ u[31] = _mm_srai_epi32(v[31], DCT_CONST_BITS);
+
+ s[0] = _mm_packs_epi32(u[0], u[1]);
+ s[1] = _mm_packs_epi32(u[2], u[3]);
+ s[2] = _mm_packs_epi32(u[4], u[5]);
+ s[3] = _mm_packs_epi32(u[6], u[7]);
+ s[4] = _mm_packs_epi32(u[8], u[9]);
+ s[5] = _mm_packs_epi32(u[10], u[11]);
+ s[6] = _mm_packs_epi32(u[12], u[13]);
+ s[7] = _mm_packs_epi32(u[14], u[15]);
+ s[8] = _mm_packs_epi32(u[16], u[17]);
+ s[9] = _mm_packs_epi32(u[18], u[19]);
+ s[10] = _mm_packs_epi32(u[20], u[21]);
+ s[11] = _mm_packs_epi32(u[22], u[23]);
+ s[12] = _mm_packs_epi32(u[24], u[25]);
+ s[13] = _mm_packs_epi32(u[26], u[27]);
+ s[14] = _mm_packs_epi32(u[28], u[29]);
+ s[15] = _mm_packs_epi32(u[30], u[31]);
+
+ // stage 2
+ u[0] = _mm_unpacklo_epi16(s[8], s[9]);
+ u[1] = _mm_unpackhi_epi16(s[8], s[9]);
+ u[2] = _mm_unpacklo_epi16(s[10], s[11]);
+ u[3] = _mm_unpackhi_epi16(s[10], s[11]);
+ u[4] = _mm_unpacklo_epi16(s[12], s[13]);
+ u[5] = _mm_unpackhi_epi16(s[12], s[13]);
+ u[6] = _mm_unpacklo_epi16(s[14], s[15]);
+ u[7] = _mm_unpackhi_epi16(s[14], s[15]);
+
+ v[0] = _mm_madd_epi16(u[0], k__cospi_p04_p28);
+ v[1] = _mm_madd_epi16(u[1], k__cospi_p04_p28);
+ v[2] = _mm_madd_epi16(u[0], k__cospi_p28_m04);
+ v[3] = _mm_madd_epi16(u[1], k__cospi_p28_m04);
+ v[4] = _mm_madd_epi16(u[2], k__cospi_p20_p12);
+ v[5] = _mm_madd_epi16(u[3], k__cospi_p20_p12);
+ v[6] = _mm_madd_epi16(u[2], k__cospi_p12_m20);
+ v[7] = _mm_madd_epi16(u[3], k__cospi_p12_m20);
+ v[8] = _mm_madd_epi16(u[4], k__cospi_m28_p04);
+ v[9] = _mm_madd_epi16(u[5], k__cospi_m28_p04);
+ v[10] = _mm_madd_epi16(u[4], k__cospi_p04_p28);
+ v[11] = _mm_madd_epi16(u[5], k__cospi_p04_p28);
+ v[12] = _mm_madd_epi16(u[6], k__cospi_m12_p20);
+ v[13] = _mm_madd_epi16(u[7], k__cospi_m12_p20);
+ v[14] = _mm_madd_epi16(u[6], k__cospi_p20_p12);
+ v[15] = _mm_madd_epi16(u[7], k__cospi_p20_p12);
+
+ u[0] = _mm_add_epi32(v[0], v[8]);
+ u[1] = _mm_add_epi32(v[1], v[9]);
+ u[2] = _mm_add_epi32(v[2], v[10]);
+ u[3] = _mm_add_epi32(v[3], v[11]);
+ u[4] = _mm_add_epi32(v[4], v[12]);
+ u[5] = _mm_add_epi32(v[5], v[13]);
+ u[6] = _mm_add_epi32(v[6], v[14]);
+ u[7] = _mm_add_epi32(v[7], v[15]);
+ u[8] = _mm_sub_epi32(v[0], v[8]);
+ u[9] = _mm_sub_epi32(v[1], v[9]);
+ u[10] = _mm_sub_epi32(v[2], v[10]);
+ u[11] = _mm_sub_epi32(v[3], v[11]);
+ u[12] = _mm_sub_epi32(v[4], v[12]);
+ u[13] = _mm_sub_epi32(v[5], v[13]);
+ u[14] = _mm_sub_epi32(v[6], v[14]);
+ u[15] = _mm_sub_epi32(v[7], v[15]);
+
+ v[0] = _mm_add_epi32(u[0], k__DCT_CONST_ROUNDING);
+ v[1] = _mm_add_epi32(u[1], k__DCT_CONST_ROUNDING);
+ v[2] = _mm_add_epi32(u[2], k__DCT_CONST_ROUNDING);
+ v[3] = _mm_add_epi32(u[3], k__DCT_CONST_ROUNDING);
+ v[4] = _mm_add_epi32(u[4], k__DCT_CONST_ROUNDING);
+ v[5] = _mm_add_epi32(u[5], k__DCT_CONST_ROUNDING);
+ v[6] = _mm_add_epi32(u[6], k__DCT_CONST_ROUNDING);
+ v[7] = _mm_add_epi32(u[7], k__DCT_CONST_ROUNDING);
+ v[8] = _mm_add_epi32(u[8], k__DCT_CONST_ROUNDING);
+ v[9] = _mm_add_epi32(u[9], k__DCT_CONST_ROUNDING);
+ v[10] = _mm_add_epi32(u[10], k__DCT_CONST_ROUNDING);
+ v[11] = _mm_add_epi32(u[11], k__DCT_CONST_ROUNDING);
+ v[12] = _mm_add_epi32(u[12], k__DCT_CONST_ROUNDING);
+ v[13] = _mm_add_epi32(u[13], k__DCT_CONST_ROUNDING);
+ v[14] = _mm_add_epi32(u[14], k__DCT_CONST_ROUNDING);
+ v[15] = _mm_add_epi32(u[15], k__DCT_CONST_ROUNDING);
+
+ u[0] = _mm_srai_epi32(v[0], DCT_CONST_BITS);
+ u[1] = _mm_srai_epi32(v[1], DCT_CONST_BITS);
+ u[2] = _mm_srai_epi32(v[2], DCT_CONST_BITS);
+ u[3] = _mm_srai_epi32(v[3], DCT_CONST_BITS);
+ u[4] = _mm_srai_epi32(v[4], DCT_CONST_BITS);
+ u[5] = _mm_srai_epi32(v[5], DCT_CONST_BITS);
+ u[6] = _mm_srai_epi32(v[6], DCT_CONST_BITS);
+ u[7] = _mm_srai_epi32(v[7], DCT_CONST_BITS);
+ u[8] = _mm_srai_epi32(v[8], DCT_CONST_BITS);
+ u[9] = _mm_srai_epi32(v[9], DCT_CONST_BITS);
+ u[10] = _mm_srai_epi32(v[10], DCT_CONST_BITS);
+ u[11] = _mm_srai_epi32(v[11], DCT_CONST_BITS);
+ u[12] = _mm_srai_epi32(v[12], DCT_CONST_BITS);
+ u[13] = _mm_srai_epi32(v[13], DCT_CONST_BITS);
+ u[14] = _mm_srai_epi32(v[14], DCT_CONST_BITS);
+ u[15] = _mm_srai_epi32(v[15], DCT_CONST_BITS);
+
+ x[0] = _mm_add_epi16(s[0], s[4]);
+ x[1] = _mm_add_epi16(s[1], s[5]);
+ x[2] = _mm_add_epi16(s[2], s[6]);
+ x[3] = _mm_add_epi16(s[3], s[7]);
+ x[4] = _mm_sub_epi16(s[0], s[4]);
+ x[5] = _mm_sub_epi16(s[1], s[5]);
+ x[6] = _mm_sub_epi16(s[2], s[6]);
+ x[7] = _mm_sub_epi16(s[3], s[7]);
+ x[8] = _mm_packs_epi32(u[0], u[1]);
+ x[9] = _mm_packs_epi32(u[2], u[3]);
+ x[10] = _mm_packs_epi32(u[4], u[5]);
+ x[11] = _mm_packs_epi32(u[6], u[7]);
+ x[12] = _mm_packs_epi32(u[8], u[9]);
+ x[13] = _mm_packs_epi32(u[10], u[11]);
+ x[14] = _mm_packs_epi32(u[12], u[13]);
+ x[15] = _mm_packs_epi32(u[14], u[15]);
+
+ // stage 3
+ u[0] = _mm_unpacklo_epi16(x[4], x[5]);
+ u[1] = _mm_unpackhi_epi16(x[4], x[5]);
+ u[2] = _mm_unpacklo_epi16(x[6], x[7]);
+ u[3] = _mm_unpackhi_epi16(x[6], x[7]);
+ u[4] = _mm_unpacklo_epi16(x[12], x[13]);
+ u[5] = _mm_unpackhi_epi16(x[12], x[13]);
+ u[6] = _mm_unpacklo_epi16(x[14], x[15]);
+ u[7] = _mm_unpackhi_epi16(x[14], x[15]);
+
+ v[0] = _mm_madd_epi16(u[0], k__cospi_p08_p24);
+ v[1] = _mm_madd_epi16(u[1], k__cospi_p08_p24);
+ v[2] = _mm_madd_epi16(u[0], k__cospi_p24_m08);
+ v[3] = _mm_madd_epi16(u[1], k__cospi_p24_m08);
+ v[4] = _mm_madd_epi16(u[2], k__cospi_m24_p08);
+ v[5] = _mm_madd_epi16(u[3], k__cospi_m24_p08);
+ v[6] = _mm_madd_epi16(u[2], k__cospi_p08_p24);
+ v[7] = _mm_madd_epi16(u[3], k__cospi_p08_p24);
+ v[8] = _mm_madd_epi16(u[4], k__cospi_p08_p24);
+ v[9] = _mm_madd_epi16(u[5], k__cospi_p08_p24);
+ v[10] = _mm_madd_epi16(u[4], k__cospi_p24_m08);
+ v[11] = _mm_madd_epi16(u[5], k__cospi_p24_m08);
+ v[12] = _mm_madd_epi16(u[6], k__cospi_m24_p08);
+ v[13] = _mm_madd_epi16(u[7], k__cospi_m24_p08);
+ v[14] = _mm_madd_epi16(u[6], k__cospi_p08_p24);
+ v[15] = _mm_madd_epi16(u[7], k__cospi_p08_p24);
+
+ u[0] = _mm_add_epi32(v[0], v[4]);
+ u[1] = _mm_add_epi32(v[1], v[5]);
+ u[2] = _mm_add_epi32(v[2], v[6]);
+ u[3] = _mm_add_epi32(v[3], v[7]);
+ u[4] = _mm_sub_epi32(v[0], v[4]);
+ u[5] = _mm_sub_epi32(v[1], v[5]);
+ u[6] = _mm_sub_epi32(v[2], v[6]);
+ u[7] = _mm_sub_epi32(v[3], v[7]);
+ u[8] = _mm_add_epi32(v[8], v[12]);
+ u[9] = _mm_add_epi32(v[9], v[13]);
+ u[10] = _mm_add_epi32(v[10], v[14]);
+ u[11] = _mm_add_epi32(v[11], v[15]);
+ u[12] = _mm_sub_epi32(v[8], v[12]);
+ u[13] = _mm_sub_epi32(v[9], v[13]);
+ u[14] = _mm_sub_epi32(v[10], v[14]);
+ u[15] = _mm_sub_epi32(v[11], v[15]);
+
+ u[0] = _mm_add_epi32(u[0], k__DCT_CONST_ROUNDING);
+ u[1] = _mm_add_epi32(u[1], k__DCT_CONST_ROUNDING);
+ u[2] = _mm_add_epi32(u[2], k__DCT_CONST_ROUNDING);
+ u[3] = _mm_add_epi32(u[3], k__DCT_CONST_ROUNDING);
+ u[4] = _mm_add_epi32(u[4], k__DCT_CONST_ROUNDING);
+ u[5] = _mm_add_epi32(u[5], k__DCT_CONST_ROUNDING);
+ u[6] = _mm_add_epi32(u[6], k__DCT_CONST_ROUNDING);
+ u[7] = _mm_add_epi32(u[7], k__DCT_CONST_ROUNDING);
+ u[8] = _mm_add_epi32(u[8], k__DCT_CONST_ROUNDING);
+ u[9] = _mm_add_epi32(u[9], k__DCT_CONST_ROUNDING);
+ u[10] = _mm_add_epi32(u[10], k__DCT_CONST_ROUNDING);
+ u[11] = _mm_add_epi32(u[11], k__DCT_CONST_ROUNDING);
+ u[12] = _mm_add_epi32(u[12], k__DCT_CONST_ROUNDING);
+ u[13] = _mm_add_epi32(u[13], k__DCT_CONST_ROUNDING);
+ u[14] = _mm_add_epi32(u[14], k__DCT_CONST_ROUNDING);
+ u[15] = _mm_add_epi32(u[15], k__DCT_CONST_ROUNDING);
+
+ v[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);
+ v[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);
+ v[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);
+ v[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);
+ v[4] = _mm_srai_epi32(u[4], DCT_CONST_BITS);
+ v[5] = _mm_srai_epi32(u[5], DCT_CONST_BITS);
+ v[6] = _mm_srai_epi32(u[6], DCT_CONST_BITS);
+ v[7] = _mm_srai_epi32(u[7], DCT_CONST_BITS);
+ v[8] = _mm_srai_epi32(u[8], DCT_CONST_BITS);
+ v[9] = _mm_srai_epi32(u[9], DCT_CONST_BITS);
+ v[10] = _mm_srai_epi32(u[10], DCT_CONST_BITS);
+ v[11] = _mm_srai_epi32(u[11], DCT_CONST_BITS);
+ v[12] = _mm_srai_epi32(u[12], DCT_CONST_BITS);
+ v[13] = _mm_srai_epi32(u[13], DCT_CONST_BITS);
+ v[14] = _mm_srai_epi32(u[14], DCT_CONST_BITS);
+ v[15] = _mm_srai_epi32(u[15], DCT_CONST_BITS);
+
+ s[0] = _mm_add_epi16(x[0], x[2]);
+ s[1] = _mm_add_epi16(x[1], x[3]);
+ s[2] = _mm_sub_epi16(x[0], x[2]);
+ s[3] = _mm_sub_epi16(x[1], x[3]);
+ s[4] = _mm_packs_epi32(v[0], v[1]);
+ s[5] = _mm_packs_epi32(v[2], v[3]);
+ s[6] = _mm_packs_epi32(v[4], v[5]);
+ s[7] = _mm_packs_epi32(v[6], v[7]);
+ s[8] = _mm_add_epi16(x[8], x[10]);
+ s[9] = _mm_add_epi16(x[9], x[11]);
+ s[10] = _mm_sub_epi16(x[8], x[10]);
+ s[11] = _mm_sub_epi16(x[9], x[11]);
+ s[12] = _mm_packs_epi32(v[8], v[9]);
+ s[13] = _mm_packs_epi32(v[10], v[11]);
+ s[14] = _mm_packs_epi32(v[12], v[13]);
+ s[15] = _mm_packs_epi32(v[14], v[15]);
+
+ // stage 4
+ u[0] = _mm_unpacklo_epi16(s[2], s[3]);
+ u[1] = _mm_unpackhi_epi16(s[2], s[3]);
+ u[2] = _mm_unpacklo_epi16(s[6], s[7]);
+ u[3] = _mm_unpackhi_epi16(s[6], s[7]);
+ u[4] = _mm_unpacklo_epi16(s[10], s[11]);
+ u[5] = _mm_unpackhi_epi16(s[10], s[11]);
+ u[6] = _mm_unpacklo_epi16(s[14], s[15]);
+ u[7] = _mm_unpackhi_epi16(s[14], s[15]);
+
+ v[0] = _mm_madd_epi16(u[0], k__cospi_m16_m16);
+ v[1] = _mm_madd_epi16(u[1], k__cospi_m16_m16);
+ v[2] = _mm_madd_epi16(u[0], k__cospi_p16_m16);
+ v[3] = _mm_madd_epi16(u[1], k__cospi_p16_m16);
+ v[4] = _mm_madd_epi16(u[2], k__cospi_p16_p16);
+ v[5] = _mm_madd_epi16(u[3], k__cospi_p16_p16);
+ v[6] = _mm_madd_epi16(u[2], k__cospi_m16_p16);
+ v[7] = _mm_madd_epi16(u[3], k__cospi_m16_p16);
+ v[8] = _mm_madd_epi16(u[4], k__cospi_p16_p16);
+ v[9] = _mm_madd_epi16(u[5], k__cospi_p16_p16);
+ v[10] = _mm_madd_epi16(u[4], k__cospi_m16_p16);
+ v[11] = _mm_madd_epi16(u[5], k__cospi_m16_p16);
+ v[12] = _mm_madd_epi16(u[6], k__cospi_m16_m16);
+ v[13] = _mm_madd_epi16(u[7], k__cospi_m16_m16);
+ v[14] = _mm_madd_epi16(u[6], k__cospi_p16_m16);
+ v[15] = _mm_madd_epi16(u[7], k__cospi_p16_m16);
+
+ u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);
+ u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);
+ u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);
+ u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);
+ u[4] = _mm_add_epi32(v[4], k__DCT_CONST_ROUNDING);
+ u[5] = _mm_add_epi32(v[5], k__DCT_CONST_ROUNDING);
+ u[6] = _mm_add_epi32(v[6], k__DCT_CONST_ROUNDING);
+ u[7] = _mm_add_epi32(v[7], k__DCT_CONST_ROUNDING);
+ u[8] = _mm_add_epi32(v[8], k__DCT_CONST_ROUNDING);
+ u[9] = _mm_add_epi32(v[9], k__DCT_CONST_ROUNDING);
+ u[10] = _mm_add_epi32(v[10], k__DCT_CONST_ROUNDING);
+ u[11] = _mm_add_epi32(v[11], k__DCT_CONST_ROUNDING);
+ u[12] = _mm_add_epi32(v[12], k__DCT_CONST_ROUNDING);
+ u[13] = _mm_add_epi32(v[13], k__DCT_CONST_ROUNDING);
+ u[14] = _mm_add_epi32(v[14], k__DCT_CONST_ROUNDING);
+ u[15] = _mm_add_epi32(v[15], k__DCT_CONST_ROUNDING);
+
+ v[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);
+ v[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);
+ v[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);
+ v[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);
+ v[4] = _mm_srai_epi32(u[4], DCT_CONST_BITS);
+ v[5] = _mm_srai_epi32(u[5], DCT_CONST_BITS);
+ v[6] = _mm_srai_epi32(u[6], DCT_CONST_BITS);
+ v[7] = _mm_srai_epi32(u[7], DCT_CONST_BITS);
+ v[8] = _mm_srai_epi32(u[8], DCT_CONST_BITS);
+ v[9] = _mm_srai_epi32(u[9], DCT_CONST_BITS);
+ v[10] = _mm_srai_epi32(u[10], DCT_CONST_BITS);
+ v[11] = _mm_srai_epi32(u[11], DCT_CONST_BITS);
+ v[12] = _mm_srai_epi32(u[12], DCT_CONST_BITS);
+ v[13] = _mm_srai_epi32(u[13], DCT_CONST_BITS);
+ v[14] = _mm_srai_epi32(u[14], DCT_CONST_BITS);
+ v[15] = _mm_srai_epi32(u[15], DCT_CONST_BITS);
+
+ in[0] = s[0];
+ in[1] = _mm_sub_epi16(kZero, s[8]);
+ in[2] = s[12];
+ in[3] = _mm_sub_epi16(kZero, s[4]);
+ in[4] = _mm_packs_epi32(v[4], v[5]);
+ in[5] = _mm_packs_epi32(v[12], v[13]);
+ in[6] = _mm_packs_epi32(v[8], v[9]);
+ in[7] = _mm_packs_epi32(v[0], v[1]);
+ in[8] = _mm_packs_epi32(v[2], v[3]);
+ in[9] = _mm_packs_epi32(v[10], v[11]);
+ in[10] = _mm_packs_epi32(v[14], v[15]);
+ in[11] = _mm_packs_epi32(v[6], v[7]);
+ in[12] = s[5];
+ in[13] = _mm_sub_epi16(kZero, s[13]);
+ in[14] = s[9];
+ in[15] = _mm_sub_epi16(kZero, s[1]);
+}
+
+void fdct16_1d_avx2(__m128i *in0, __m128i *in1) {+ fdct16_1d_8col_avx2(in0);
+ fdct16_1d_8col_avx2(in1);
+ array_transpose_16x16_avx2(in0, in1);
+}
+
+void fadst16_1d_avx2(__m128i *in0, __m128i *in1) {+ fadst16_1d_8col_avx2(in0);
+ fadst16_1d_8col_avx2(in1);
+ array_transpose_16x16_avx2(in0, in1);
+}
+
+void vp9_short_fht16x16_avx2(const int16_t *input, int16_t *output,
+ int stride, int tx_type) {+ __m128i in0[16], in1[16];
+ load_buffer_16x16_avx2(input, in0, in1, stride);
+ switch (tx_type) {+ case 0: // DCT_DCT
+ fdct16_1d_avx2(in0, in1);
+ right_shift_16x16_avx2(in0, in1);
+ fdct16_1d_avx2(in0, in1);
+ break;
+ case 1: // ADST_DCT
+ fadst16_1d_avx2(in0, in1);
+ right_shift_16x16_avx2(in0, in1);
+ fdct16_1d_avx2(in0, in1);
+ break;
+ case 2: // DCT_ADST
+ fdct16_1d_avx2(in0, in1);
+ right_shift_16x16_avx2(in0, in1);
+ fadst16_1d_avx2(in0, in1);
+ break;
+ case 3: // ADST_ADST
+ fadst16_1d_avx2(in0, in1);
+ right_shift_16x16_avx2(in0, in1);
+ fadst16_1d_avx2(in0, in1);
+ break;
+ default:
+ assert(0);
+ break;
+ }
+ write_buffer_16x16_avx2(output, in0, in1, 16);
+}
+
+#define FDCT32x32_2D_AVX2 vp9_fdct32x32_rd_avx2
+#define FDCT32x32_HIGH_PRECISION 0
+#include "vp9/encoder/x86/vp9_dct32x32_avx2.c"
+#undef FDCT32x32_2D_AVX2
+#undef FDCT32x32_HIGH_PRECISION
+
+#define FDCT32x32_2D_AVX2 vp9_fdct32x32_avx2
+#define FDCT32x32_HIGH_PRECISION 1
+#include "vp9/encoder/x86/vp9_dct32x32_avx2.c" // NOLINT
+#undef FDCT32x32_2D_AVX2
+#undef FDCT32x32_HIGH_PRECISION
--- a/vp9/vp9cx.mk
+++ b/vp9/vp9cx.mk
@@ -106,4 +106,7 @@
VP9_CX_SRCS-$(HAVE_SSE2) += encoder/x86/vp9_dct_sse2.c
VP9_CX_SRCS-$(HAVE_SSE2) += encoder/x86/vp9_dct32x32_sse2.c
+VP9_CX_SRCS-$(HAVE_AVX2) += encoder/x86/vp9_dct_avx2.c
+VP9_CX_SRCS-$(HAVE_AVX2) += encoder/x86/vp9_dct32x32_avx2.c
+
VP9_CX_SRCS-yes := $(filter-out $(VP9_CX_SRCS_REMOVE-yes),$(VP9_CX_SRCS-yes))
--
⑨