ref: 1b8c57e915d3041974c66d3649da1e7cf8cb7aff
dir: /vp9/encoder/arm/neon/vp9_sad_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 "./vp9_rtcd.h"
#include "./vpx_config.h"
#include "vpx/vpx_integer.h"
static INLINE unsigned int horizontal_long_add_16x8(const uint16x8_t vec_lo,
const uint16x8_t vec_hi) {
const uint32x4_t vec_l_lo = vaddl_u16(vget_low_u16(vec_lo),
vget_high_u16(vec_lo));
const uint32x4_t vec_l_hi = vaddl_u16(vget_low_u16(vec_hi),
vget_high_u16(vec_hi));
const uint32x4_t a = vaddq_u32(vec_l_lo, vec_l_hi);
const uint64x2_t b = vpaddlq_u32(a);
const uint32x2_t c = vadd_u32(vreinterpret_u32_u64(vget_low_u64(b)),
vreinterpret_u32_u64(vget_high_u64(b)));
return vget_lane_u32(c, 0);
}
static INLINE unsigned int horizontal_add_16x8(const uint16x8_t vec_16x8) {
const uint32x4_t a = vpaddlq_u16(vec_16x8);
const uint64x2_t b = vpaddlq_u32(a);
const uint32x2_t c = vadd_u32(vreinterpret_u32_u64(vget_low_u64(b)),
vreinterpret_u32_u64(vget_high_u64(b)));
return vget_lane_u32(c, 0);
}
unsigned int vp9_sad64x64_neon(const uint8_t *src, int src_stride,
const uint8_t *ref, int ref_stride) {
int i;
uint16x8_t vec_accum_lo = vdupq_n_u16(0);
uint16x8_t vec_accum_hi = vdupq_n_u16(0);
for (i = 0; i < 64; ++i) {
const uint8x16_t vec_src_00 = vld1q_u8(src);
const uint8x16_t vec_src_16 = vld1q_u8(src + 16);
const uint8x16_t vec_src_32 = vld1q_u8(src + 32);
const uint8x16_t vec_src_48 = vld1q_u8(src + 48);
const uint8x16_t vec_ref_00 = vld1q_u8(ref);
const uint8x16_t vec_ref_16 = vld1q_u8(ref + 16);
const uint8x16_t vec_ref_32 = vld1q_u8(ref + 32);
const uint8x16_t vec_ref_48 = vld1q_u8(ref + 48);
src += src_stride;
ref += ref_stride;
vec_accum_lo = vabal_u8(vec_accum_lo, vget_low_u8(vec_src_00),
vget_low_u8(vec_ref_00));
vec_accum_hi = vabal_u8(vec_accum_hi, vget_high_u8(vec_src_00),
vget_high_u8(vec_ref_00));
vec_accum_lo = vabal_u8(vec_accum_lo, vget_low_u8(vec_src_16),
vget_low_u8(vec_ref_16));
vec_accum_hi = vabal_u8(vec_accum_hi, vget_high_u8(vec_src_16),
vget_high_u8(vec_ref_16));
vec_accum_lo = vabal_u8(vec_accum_lo, vget_low_u8(vec_src_32),
vget_low_u8(vec_ref_32));
vec_accum_hi = vabal_u8(vec_accum_hi, vget_high_u8(vec_src_32),
vget_high_u8(vec_ref_32));
vec_accum_lo = vabal_u8(vec_accum_lo, vget_low_u8(vec_src_48),
vget_low_u8(vec_ref_48));
vec_accum_hi = vabal_u8(vec_accum_hi, vget_high_u8(vec_src_48),
vget_high_u8(vec_ref_48));
}
return horizontal_long_add_16x8(vec_accum_lo, vec_accum_hi);
}
unsigned int vp9_sad32x32_neon(const uint8_t *src, int src_stride,
const uint8_t *ref, int ref_stride) {
int i;
uint16x8_t vec_accum_lo = vdupq_n_u16(0);
uint16x8_t vec_accum_hi = vdupq_n_u16(0);
for (i = 0; i < 32; ++i) {
const uint8x16_t vec_src_00 = vld1q_u8(src);
const uint8x16_t vec_src_16 = vld1q_u8(src + 16);
const uint8x16_t vec_ref_00 = vld1q_u8(ref);
const uint8x16_t vec_ref_16 = vld1q_u8(ref + 16);
src += src_stride;
ref += ref_stride;
vec_accum_lo = vabal_u8(vec_accum_lo, vget_low_u8(vec_src_00),
vget_low_u8(vec_ref_00));
vec_accum_hi = vabal_u8(vec_accum_hi, vget_high_u8(vec_src_00),
vget_high_u8(vec_ref_00));
vec_accum_lo = vabal_u8(vec_accum_lo, vget_low_u8(vec_src_16),
vget_low_u8(vec_ref_16));
vec_accum_hi = vabal_u8(vec_accum_hi, vget_high_u8(vec_src_16),
vget_high_u8(vec_ref_16));
}
return horizontal_add_16x8(vaddq_u16(vec_accum_lo, vec_accum_hi));
}
unsigned int vp9_sad16x16_neon(const uint8_t *src, int src_stride,
const uint8_t *ref, int ref_stride) {
int i;
uint16x8_t vec_accum_lo = vdupq_n_u16(0);
uint16x8_t vec_accum_hi = vdupq_n_u16(0);
for (i = 0; i < 16; ++i) {
const uint8x16_t vec_src = vld1q_u8(src);
const uint8x16_t vec_ref = vld1q_u8(ref);
src += src_stride;
ref += ref_stride;
vec_accum_lo = vabal_u8(vec_accum_lo, vget_low_u8(vec_src),
vget_low_u8(vec_ref));
vec_accum_hi = vabal_u8(vec_accum_hi, vget_high_u8(vec_src),
vget_high_u8(vec_ref));
}
return horizontal_add_16x8(vaddq_u16(vec_accum_lo, vec_accum_hi));
}
unsigned int vp9_sad8x8_neon(const uint8_t *src, int src_stride,
const uint8_t *ref, int ref_stride) {
int i;
uint16x8_t vec_accum = vdupq_n_u16(0);
for (i = 0; i < 8; ++i) {
const uint8x8_t vec_src = vld1_u8(src);
const uint8x8_t vec_ref = vld1_u8(ref);
src += src_stride;
ref += ref_stride;
vec_accum = vabal_u8(vec_accum, vec_src, vec_ref);
}
return horizontal_add_16x8(vec_accum);
}