ref: 77c1b9d259149fb53d1c1852786568c4367ae85d
dir: /vpx_dsp/arm/highbd_idct8x8_add_neon.c/
/*
* Copyright (c) 2016 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 <arm_neon.h>
#include "./vpx_dsp_rtcd.h"
#include "vpx_dsp/arm/highbd_idct_neon.h"
#include "vpx_dsp/arm/idct_neon.h"
#include "vpx_dsp/arm/transpose_neon.h"
#include "vpx_dsp/inv_txfm.h"
static INLINE void highbd_idct8x8_1_add_pos_kernel(uint16_t **dest,
const int stride,
const int16x8_t res,
const int16x8_t max) {
const uint16x8_t a = vld1q_u16(*dest);
const int16x8_t b = vaddq_s16(res, vreinterpretq_s16_u16(a));
const int16x8_t c = vminq_s16(b, max);
vst1q_u16(*dest, vreinterpretq_u16_s16(c));
*dest += stride;
}
static INLINE void highbd_idct8x8_1_add_neg_kernel(uint16_t **dest,
const int stride,
const int16x8_t res) {
const uint16x8_t a = vld1q_u16(*dest);
const int16x8_t b = vaddq_s16(res, vreinterpretq_s16_u16(a));
const uint16x8_t c = vqshluq_n_s16(b, 0);
vst1q_u16(*dest, c);
*dest += stride;
}
void vpx_highbd_idct8x8_1_add_neon(const tran_low_t *input, uint16_t *dest,
int stride, int bd) {
const tran_low_t out0 = HIGHBD_WRAPLOW(
dct_const_round_shift(input[0] * (tran_high_t)cospi_16_64), bd);
const tran_low_t out1 = HIGHBD_WRAPLOW(
dct_const_round_shift(out0 * (tran_high_t)cospi_16_64), bd);
const int16_t a1 = ROUND_POWER_OF_TWO(out1, 5);
const int16x8_t dc = vdupq_n_s16(a1);
if (a1 >= 0) {
const int16x8_t max = vdupq_n_s16((1 << bd) - 1);
highbd_idct8x8_1_add_pos_kernel(&dest, stride, dc, max);
highbd_idct8x8_1_add_pos_kernel(&dest, stride, dc, max);
highbd_idct8x8_1_add_pos_kernel(&dest, stride, dc, max);
highbd_idct8x8_1_add_pos_kernel(&dest, stride, dc, max);
highbd_idct8x8_1_add_pos_kernel(&dest, stride, dc, max);
highbd_idct8x8_1_add_pos_kernel(&dest, stride, dc, max);
highbd_idct8x8_1_add_pos_kernel(&dest, stride, dc, max);
highbd_idct8x8_1_add_pos_kernel(&dest, stride, dc, max);
} else {
highbd_idct8x8_1_add_neg_kernel(&dest, stride, dc);
highbd_idct8x8_1_add_neg_kernel(&dest, stride, dc);
highbd_idct8x8_1_add_neg_kernel(&dest, stride, dc);
highbd_idct8x8_1_add_neg_kernel(&dest, stride, dc);
highbd_idct8x8_1_add_neg_kernel(&dest, stride, dc);
highbd_idct8x8_1_add_neg_kernel(&dest, stride, dc);
highbd_idct8x8_1_add_neg_kernel(&dest, stride, dc);
highbd_idct8x8_1_add_neg_kernel(&dest, stride, dc);
}
}
static INLINE void idct8x8_12_half1d_bd10(
const int32x4_t cospis0, const int32x4_t cospis1, int32x4_t *const io0,
int32x4_t *const io1, int32x4_t *const io2, int32x4_t *const io3,
int32x4_t *const io4, int32x4_t *const io5, int32x4_t *const io6,
int32x4_t *const io7) {
int32x4_t step1[8], step2[8];
transpose_s32_4x4(io0, io1, io2, io3);
// stage 1
step1[4] = vmulq_lane_s32(*io1, vget_high_s32(cospis1), 1);
step1[5] = vmulq_lane_s32(*io3, vget_high_s32(cospis1), 0);
step1[6] = vmulq_lane_s32(*io3, vget_low_s32(cospis1), 1);
step1[7] = vmulq_lane_s32(*io1, vget_low_s32(cospis1), 0);
step1[4] = vrshrq_n_s32(step1[4], DCT_CONST_BITS);
step1[5] = vrshrq_n_s32(step1[5], DCT_CONST_BITS);
step1[6] = vrshrq_n_s32(step1[6], DCT_CONST_BITS);
step1[7] = vrshrq_n_s32(step1[7], DCT_CONST_BITS);
// stage 2
step2[1] = vmulq_lane_s32(*io0, vget_high_s32(cospis0), 0);
step2[2] = vmulq_lane_s32(*io2, vget_high_s32(cospis0), 1);
step2[3] = vmulq_lane_s32(*io2, vget_low_s32(cospis0), 1);
step2[1] = vrshrq_n_s32(step2[1], DCT_CONST_BITS);
step2[2] = vrshrq_n_s32(step2[2], DCT_CONST_BITS);
step2[3] = vrshrq_n_s32(step2[3], DCT_CONST_BITS);
step2[4] = vaddq_s32(step1[4], step1[5]);
step2[5] = vsubq_s32(step1[4], step1[5]);
step2[6] = vsubq_s32(step1[7], step1[6]);
step2[7] = vaddq_s32(step1[7], step1[6]);
// stage 3
step1[0] = vaddq_s32(step2[1], step2[3]);
step1[1] = vaddq_s32(step2[1], step2[2]);
step1[2] = vsubq_s32(step2[1], step2[2]);
step1[3] = vsubq_s32(step2[1], step2[3]);
step1[6] = vmulq_lane_s32(step2[6], vget_high_s32(cospis0), 0);
step1[5] = vmlsq_lane_s32(step1[6], step2[5], vget_high_s32(cospis0), 0);
step1[6] = vmlaq_lane_s32(step1[6], step2[5], vget_high_s32(cospis0), 0);
step1[5] = vrshrq_n_s32(step1[5], DCT_CONST_BITS);
step1[6] = vrshrq_n_s32(step1[6], DCT_CONST_BITS);
// stage 4
*io0 = vaddq_s32(step1[0], step2[7]);
*io1 = vaddq_s32(step1[1], step1[6]);
*io2 = vaddq_s32(step1[2], step1[5]);
*io3 = vaddq_s32(step1[3], step2[4]);
*io4 = vsubq_s32(step1[3], step2[4]);
*io5 = vsubq_s32(step1[2], step1[5]);
*io6 = vsubq_s32(step1[1], step1[6]);
*io7 = vsubq_s32(step1[0], step2[7]);
}
static INLINE void idct8x8_12_half1d_bd12(
const int32x4_t cospis0, const int32x4_t cospis1, int32x4_t *const io0,
int32x4_t *const io1, int32x4_t *const io2, int32x4_t *const io3,
int32x4_t *const io4, int32x4_t *const io5, int32x4_t *const io6,
int32x4_t *const io7) {
int32x2_t input1l, input1h, input3l, input3h;
int32x2_t step1l[2], step1h[2];
int32x4_t step1[8], step2[8];
int64x2_t t64[8];
int32x2_t t32[8];
transpose_s32_4x4(io0, io1, io2, io3);
// stage 1
input1l = vget_low_s32(*io1);
input1h = vget_high_s32(*io1);
input3l = vget_low_s32(*io3);
input3h = vget_high_s32(*io3);
step1l[0] = vget_low_s32(*io0);
step1h[0] = vget_high_s32(*io0);
step1l[1] = vget_low_s32(*io2);
step1h[1] = vget_high_s32(*io2);
t64[0] = vmull_lane_s32(input1l, vget_high_s32(cospis1), 1);
t64[1] = vmull_lane_s32(input1h, vget_high_s32(cospis1), 1);
t64[2] = vmull_lane_s32(input3l, vget_high_s32(cospis1), 0);
t64[3] = vmull_lane_s32(input3h, vget_high_s32(cospis1), 0);
t64[4] = vmull_lane_s32(input3l, vget_low_s32(cospis1), 1);
t64[5] = vmull_lane_s32(input3h, vget_low_s32(cospis1), 1);
t64[6] = vmull_lane_s32(input1l, vget_low_s32(cospis1), 0);
t64[7] = vmull_lane_s32(input1h, vget_low_s32(cospis1), 0);
t32[0] = vrshrn_n_s64(t64[0], DCT_CONST_BITS);
t32[1] = vrshrn_n_s64(t64[1], DCT_CONST_BITS);
t32[2] = vrshrn_n_s64(t64[2], DCT_CONST_BITS);
t32[3] = vrshrn_n_s64(t64[3], DCT_CONST_BITS);
t32[4] = vrshrn_n_s64(t64[4], DCT_CONST_BITS);
t32[5] = vrshrn_n_s64(t64[5], DCT_CONST_BITS);
t32[6] = vrshrn_n_s64(t64[6], DCT_CONST_BITS);
t32[7] = vrshrn_n_s64(t64[7], DCT_CONST_BITS);
step1[4] = vcombine_s32(t32[0], t32[1]);
step1[5] = vcombine_s32(t32[2], t32[3]);
step1[6] = vcombine_s32(t32[4], t32[5]);
step1[7] = vcombine_s32(t32[6], t32[7]);
// stage 2
t64[2] = vmull_lane_s32(step1l[0], vget_high_s32(cospis0), 0);
t64[3] = vmull_lane_s32(step1h[0], vget_high_s32(cospis0), 0);
t64[4] = vmull_lane_s32(step1l[1], vget_high_s32(cospis0), 1);
t64[5] = vmull_lane_s32(step1h[1], vget_high_s32(cospis0), 1);
t64[6] = vmull_lane_s32(step1l[1], vget_low_s32(cospis0), 1);
t64[7] = vmull_lane_s32(step1h[1], vget_low_s32(cospis0), 1);
t32[2] = vrshrn_n_s64(t64[2], DCT_CONST_BITS);
t32[3] = vrshrn_n_s64(t64[3], DCT_CONST_BITS);
t32[4] = vrshrn_n_s64(t64[4], DCT_CONST_BITS);
t32[5] = vrshrn_n_s64(t64[5], DCT_CONST_BITS);
t32[6] = vrshrn_n_s64(t64[6], DCT_CONST_BITS);
t32[7] = vrshrn_n_s64(t64[7], DCT_CONST_BITS);
step2[1] = vcombine_s32(t32[2], t32[3]);
step2[2] = vcombine_s32(t32[4], t32[5]);
step2[3] = vcombine_s32(t32[6], t32[7]);
step2[4] = vaddq_s32(step1[4], step1[5]);
step2[5] = vsubq_s32(step1[4], step1[5]);
step2[6] = vsubq_s32(step1[7], step1[6]);
step2[7] = vaddq_s32(step1[7], step1[6]);
// stage 3
step1[0] = vaddq_s32(step2[1], step2[3]);
step1[1] = vaddq_s32(step2[1], step2[2]);
step1[2] = vsubq_s32(step2[1], step2[2]);
step1[3] = vsubq_s32(step2[1], step2[3]);
t64[2] = vmull_lane_s32(vget_low_s32(step2[6]), vget_high_s32(cospis0), 0);
t64[3] = vmull_lane_s32(vget_high_s32(step2[6]), vget_high_s32(cospis0), 0);
t64[0] =
vmlsl_lane_s32(t64[2], vget_low_s32(step2[5]), vget_high_s32(cospis0), 0);
t64[1] = vmlsl_lane_s32(t64[3], vget_high_s32(step2[5]),
vget_high_s32(cospis0), 0);
t64[2] =
vmlal_lane_s32(t64[2], vget_low_s32(step2[5]), vget_high_s32(cospis0), 0);
t64[3] = vmlal_lane_s32(t64[3], vget_high_s32(step2[5]),
vget_high_s32(cospis0), 0);
t32[0] = vrshrn_n_s64(t64[0], DCT_CONST_BITS);
t32[1] = vrshrn_n_s64(t64[1], DCT_CONST_BITS);
t32[2] = vrshrn_n_s64(t64[2], DCT_CONST_BITS);
t32[3] = vrshrn_n_s64(t64[3], DCT_CONST_BITS);
step1[5] = vcombine_s32(t32[0], t32[1]);
step1[6] = vcombine_s32(t32[2], t32[3]);
// stage 4
*io0 = vaddq_s32(step1[0], step2[7]);
*io1 = vaddq_s32(step1[1], step1[6]);
*io2 = vaddq_s32(step1[2], step1[5]);
*io3 = vaddq_s32(step1[3], step2[4]);
*io4 = vsubq_s32(step1[3], step2[4]);
*io5 = vsubq_s32(step1[2], step1[5]);
*io6 = vsubq_s32(step1[1], step1[6]);
*io7 = vsubq_s32(step1[0], step2[7]);
}
void vpx_highbd_idct8x8_12_add_neon(const tran_low_t *input, uint16_t *dest,
int stride, int bd) {
int32x4_t a[16];
int16x8_t c[8];
a[0] = vld1q_s32(input);
a[1] = vld1q_s32(input + 8);
a[2] = vld1q_s32(input + 16);
a[3] = vld1q_s32(input + 24);
if (bd == 8) {
const int16x8_t cospis = vld1q_s16(kCospi);
const int16x8_t cospisd = vaddq_s16(cospis, cospis);
const int16x4_t cospis0 = vget_low_s16(cospis); // cospi 0, 8, 16, 24
const int16x4_t cospisd0 = vget_low_s16(cospisd); // doubled 0, 8, 16, 24
const int16x4_t cospisd1 = vget_high_s16(cospisd); // doubled 4, 12, 20, 28
int16x4_t b[8];
b[0] = vmovn_s32(a[0]);
b[1] = vmovn_s32(a[1]);
b[2] = vmovn_s32(a[2]);
b[3] = vmovn_s32(a[3]);
idct8x8_12_pass1_bd8(cospis0, cospisd0, cospisd1, b);
idct8x8_12_pass2_bd8(cospis0, cospisd0, cospisd1, b, c);
c[0] = vrshrq_n_s16(c[0], 5);
c[1] = vrshrq_n_s16(c[1], 5);
c[2] = vrshrq_n_s16(c[2], 5);
c[3] = vrshrq_n_s16(c[3], 5);
c[4] = vrshrq_n_s16(c[4], 5);
c[5] = vrshrq_n_s16(c[5], 5);
c[6] = vrshrq_n_s16(c[6], 5);
c[7] = vrshrq_n_s16(c[7], 5);
} else {
const int32x4_t cospis0 = vld1q_s32(kCospi32); // cospi 0, 8, 16, 24
const int32x4_t cospis1 = vld1q_s32(kCospi32 + 4); // cospi 4, 12, 20, 28
if (bd == 10) {
idct8x8_12_half1d_bd10(cospis0, cospis1, &a[0], &a[1], &a[2], &a[3],
&a[4], &a[5], &a[6], &a[7]);
idct8x8_12_half1d_bd10(cospis0, cospis1, &a[0], &a[1], &a[2], &a[3],
&a[8], &a[9], &a[10], &a[11]);
idct8x8_12_half1d_bd10(cospis0, cospis1, &a[4], &a[5], &a[6], &a[7],
&a[12], &a[13], &a[14], &a[15]);
} else {
idct8x8_12_half1d_bd12(cospis0, cospis1, &a[0], &a[1], &a[2], &a[3],
&a[4], &a[5], &a[6], &a[7]);
idct8x8_12_half1d_bd12(cospis0, cospis1, &a[0], &a[1], &a[2], &a[3],
&a[8], &a[9], &a[10], &a[11]);
idct8x8_12_half1d_bd12(cospis0, cospis1, &a[4], &a[5], &a[6], &a[7],
&a[12], &a[13], &a[14], &a[15]);
}
c[0] = vcombine_s16(vrshrn_n_s32(a[0], 5), vrshrn_n_s32(a[4], 5));
c[1] = vcombine_s16(vrshrn_n_s32(a[1], 5), vrshrn_n_s32(a[5], 5));
c[2] = vcombine_s16(vrshrn_n_s32(a[2], 5), vrshrn_n_s32(a[6], 5));
c[3] = vcombine_s16(vrshrn_n_s32(a[3], 5), vrshrn_n_s32(a[7], 5));
c[4] = vcombine_s16(vrshrn_n_s32(a[8], 5), vrshrn_n_s32(a[12], 5));
c[5] = vcombine_s16(vrshrn_n_s32(a[9], 5), vrshrn_n_s32(a[13], 5));
c[6] = vcombine_s16(vrshrn_n_s32(a[10], 5), vrshrn_n_s32(a[14], 5));
c[7] = vcombine_s16(vrshrn_n_s32(a[11], 5), vrshrn_n_s32(a[15], 5));
}
highbd_add8x8(c, dest, stride, bd);
}
void vpx_highbd_idct8x8_64_add_neon(const tran_low_t *input, uint16_t *dest,
int stride, int bd) {
int32x4_t a[16];
int16x8_t c[8];
a[0] = vld1q_s32(input);
a[1] = vld1q_s32(input + 4);
a[2] = vld1q_s32(input + 8);
a[3] = vld1q_s32(input + 12);
a[4] = vld1q_s32(input + 16);
a[5] = vld1q_s32(input + 20);
a[6] = vld1q_s32(input + 24);
a[7] = vld1q_s32(input + 28);
a[8] = vld1q_s32(input + 32);
a[9] = vld1q_s32(input + 36);
a[10] = vld1q_s32(input + 40);
a[11] = vld1q_s32(input + 44);
a[12] = vld1q_s32(input + 48);
a[13] = vld1q_s32(input + 52);
a[14] = vld1q_s32(input + 56);
a[15] = vld1q_s32(input + 60);
if (bd == 8) {
const int16x8_t cospis = vld1q_s16(kCospi);
const int16x4_t cospis0 = vget_low_s16(cospis); // cospi 0, 8, 16, 24
const int16x4_t cospis1 = vget_high_s16(cospis); // cospi 4, 12, 20, 28
int16x8_t b[8];
b[0] = vcombine_s16(vmovn_s32(a[0]), vmovn_s32(a[1]));
b[1] = vcombine_s16(vmovn_s32(a[2]), vmovn_s32(a[3]));
b[2] = vcombine_s16(vmovn_s32(a[4]), vmovn_s32(a[5]));
b[3] = vcombine_s16(vmovn_s32(a[6]), vmovn_s32(a[7]));
b[4] = vcombine_s16(vmovn_s32(a[8]), vmovn_s32(a[9]));
b[5] = vcombine_s16(vmovn_s32(a[10]), vmovn_s32(a[11]));
b[6] = vcombine_s16(vmovn_s32(a[12]), vmovn_s32(a[13]));
b[7] = vcombine_s16(vmovn_s32(a[14]), vmovn_s32(a[15]));
idct8x8_64_1d_bd8(cospis0, cospis1, b);
idct8x8_64_1d_bd8(cospis0, cospis1, b);
c[0] = vrshrq_n_s16(b[0], 5);
c[1] = vrshrq_n_s16(b[1], 5);
c[2] = vrshrq_n_s16(b[2], 5);
c[3] = vrshrq_n_s16(b[3], 5);
c[4] = vrshrq_n_s16(b[4], 5);
c[5] = vrshrq_n_s16(b[5], 5);
c[6] = vrshrq_n_s16(b[6], 5);
c[7] = vrshrq_n_s16(b[7], 5);
} else {
const int32x4_t cospis0 = vld1q_s32(kCospi32); // cospi 0, 8, 16, 24
const int32x4_t cospis1 = vld1q_s32(kCospi32 + 4); // cospi 4, 12, 20, 28
if (bd == 10) {
idct8x8_64_half1d_bd10(cospis0, cospis1, &a[0], &a[1], &a[2], &a[3],
&a[4], &a[5], &a[6], &a[7]);
idct8x8_64_half1d_bd10(cospis0, cospis1, &a[8], &a[9], &a[10], &a[11],
&a[12], &a[13], &a[14], &a[15]);
idct8x8_64_half1d_bd10(cospis0, cospis1, &a[0], &a[8], &a[1], &a[9],
&a[2], &a[10], &a[3], &a[11]);
idct8x8_64_half1d_bd10(cospis0, cospis1, &a[4], &a[12], &a[5], &a[13],
&a[6], &a[14], &a[7], &a[15]);
} else {
idct8x8_64_half1d_bd12(cospis0, cospis1, &a[0], &a[1], &a[2], &a[3],
&a[4], &a[5], &a[6], &a[7]);
idct8x8_64_half1d_bd12(cospis0, cospis1, &a[8], &a[9], &a[10], &a[11],
&a[12], &a[13], &a[14], &a[15]);
idct8x8_64_half1d_bd12(cospis0, cospis1, &a[0], &a[8], &a[1], &a[9],
&a[2], &a[10], &a[3], &a[11]);
idct8x8_64_half1d_bd12(cospis0, cospis1, &a[4], &a[12], &a[5], &a[13],
&a[6], &a[14], &a[7], &a[15]);
}
c[0] = vcombine_s16(vrshrn_n_s32(a[0], 5), vrshrn_n_s32(a[4], 5));
c[1] = vcombine_s16(vrshrn_n_s32(a[8], 5), vrshrn_n_s32(a[12], 5));
c[2] = vcombine_s16(vrshrn_n_s32(a[1], 5), vrshrn_n_s32(a[5], 5));
c[3] = vcombine_s16(vrshrn_n_s32(a[9], 5), vrshrn_n_s32(a[13], 5));
c[4] = vcombine_s16(vrshrn_n_s32(a[2], 5), vrshrn_n_s32(a[6], 5));
c[5] = vcombine_s16(vrshrn_n_s32(a[10], 5), vrshrn_n_s32(a[14], 5));
c[6] = vcombine_s16(vrshrn_n_s32(a[3], 5), vrshrn_n_s32(a[7], 5));
c[7] = vcombine_s16(vrshrn_n_s32(a[11], 5), vrshrn_n_s32(a[15], 5));
}
highbd_add8x8(c, dest, stride, bd);
}