ref: 757a5e6aa926cd5ee0ad6e7424cfd2968d0a03a4
dir: /vp9/common/arm/neon/vp9_iht4x4_add_neon.c/
/*
* Copyright (c) 2014 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 <assert.h>
#include "./vp9_rtcd.h"
#include "./vpx_config.h"
#include "vp9/common/vp9_common.h"
#include "vp9/common/arm/neon/vp9_iht_neon.h"
#include "vpx_dsp/arm/idct_neon.h"
#include "vpx_dsp/arm/mem_neon.h"
#include "vpx_dsp/txfm_common.h"
void vp9_iht4x4_16_add_neon(const tran_low_t *input, uint8_t *dest, int stride,
int tx_type) {
int16x8_t a[2];
uint8x8_t s[2], d[2];
uint16x8_t sum[2];
assert(!((intptr_t)dest % sizeof(uint32_t)));
assert(!(stride % sizeof(uint32_t)));
a[0] = load_tran_low_to_s16q(input);
a[1] = load_tran_low_to_s16q(input + 8);
transpose_s16_4x4q(&a[0], &a[1]);
switch (tx_type) {
case DCT_DCT:
idct4x4_16_kernel_bd8(a);
a[1] = vcombine_s16(vget_high_s16(a[1]), vget_low_s16(a[1]));
transpose_s16_4x4q(&a[0], &a[1]);
idct4x4_16_kernel_bd8(a);
a[1] = vcombine_s16(vget_high_s16(a[1]), vget_low_s16(a[1]));
break;
case ADST_DCT:
idct4x4_16_kernel_bd8(a);
a[1] = vcombine_s16(vget_high_s16(a[1]), vget_low_s16(a[1]));
transpose_s16_4x4q(&a[0], &a[1]);
iadst4(a);
break;
case DCT_ADST:
iadst4(a);
transpose_s16_4x4q(&a[0], &a[1]);
idct4x4_16_kernel_bd8(a);
a[1] = vcombine_s16(vget_high_s16(a[1]), vget_low_s16(a[1]));
break;
default:
assert(tx_type == ADST_ADST);
iadst4(a);
transpose_s16_4x4q(&a[0], &a[1]);
iadst4(a);
break;
}
a[0] = vrshrq_n_s16(a[0], 4);
a[1] = vrshrq_n_s16(a[1], 4);
s[0] = load_u8(dest, stride);
s[1] = load_u8(dest + 2 * stride, stride);
sum[0] = vaddw_u8(vreinterpretq_u16_s16(a[0]), s[0]);
sum[1] = vaddw_u8(vreinterpretq_u16_s16(a[1]), s[1]);
d[0] = vqmovun_s16(vreinterpretq_s16_u16(sum[0]));
d[1] = vqmovun_s16(vreinterpretq_s16_u16(sum[1]));
store_u8(dest, stride, d[0]);
store_u8(dest + 2 * stride, stride, d[1]);
}