ref: e3cafbc8df4c5a00de48d971f76ab6c0c246e90c
dir: /vpx_dsp/arm/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 "./vpx_config.h"
#include "vpx/vpx_integer.h"
#include "vpx_dsp/arm/mem_neon.h"
// TODO(johannkoenig): combine with avg_neon.h version.
static INLINE uint32_t 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);
}
uint32_t vpx_sad4x4_neon(const uint8_t *src_ptr, int src_stride,
const uint8_t *ref_ptr, int ref_stride) {
const uint8x16_t src_u8 = load_unaligned_u8q(src_ptr, src_stride);
const uint8x16_t ref_u8 = load_unaligned_u8q(ref_ptr, ref_stride);
uint16x8_t abs = vabdl_u8(vget_low_u8(src_u8), vget_low_u8(ref_u8));
abs = vabal_u8(abs, vget_high_u8(src_u8), vget_high_u8(ref_u8));
return horizontal_add_16x8(abs);
}
uint32_t vpx_sad4x8_neon(const uint8_t *src_ptr, int src_stride,
const uint8_t *ref_ptr, int ref_stride) {
int i;
uint16x8_t abs = vdupq_n_u16(0);
for (i = 0; i < 8; i += 4) {
const uint8x16_t src_u8 = load_unaligned_u8q(src_ptr, src_stride);
const uint8x16_t ref_u8 = load_unaligned_u8q(ref_ptr, ref_stride);
src_ptr += 4 * src_stride;
ref_ptr += 4 * ref_stride;
abs = vabal_u8(abs, vget_low_u8(src_u8), vget_low_u8(ref_u8));
abs = vabal_u8(abs, vget_high_u8(src_u8), vget_high_u8(ref_u8));
}
return horizontal_add_16x8(abs);
}
static INLINE uint16x8_t sad8x(const uint8_t *a, int a_stride, const uint8_t *b,
int b_stride, const int height) {
int i;
uint16x8_t abs = vdupq_n_u16(0);
for (i = 0; i < height; ++i) {
const uint8x8_t a_u8 = vld1_u8(a);
const uint8x8_t b_u8 = vld1_u8(b);
a += a_stride;
b += b_stride;
abs = vabal_u8(abs, a_u8, b_u8);
}
return abs;
}
uint32_t vpx_sad8x4_neon(const uint8_t *src, int src_stride, const uint8_t *ref,
int ref_stride) {
const uint16x8_t abs = sad8x(src, src_stride, ref, ref_stride, 4);
return horizontal_add_16x8(abs);
}
uint32_t vpx_sad8x8_neon(const uint8_t *src, int src_stride, const uint8_t *ref,
int ref_stride) {
const uint16x8_t abs = sad8x(src, src_stride, ref, ref_stride, 8);
return horizontal_add_16x8(abs);
}
uint32_t vpx_sad8x16_neon(const uint8_t *src, int src_stride,
const uint8_t *ref, int ref_stride) {
const uint16x8_t abs = sad8x(src, src_stride, ref, ref_stride, 16);
return horizontal_add_16x8(abs);
}
static INLINE uint16x8_t sad16x(const uint8_t *a, int a_stride,
const uint8_t *b, int b_stride,
const int height) {
int i;
uint16x8_t abs = vdupq_n_u16(0);
for (i = 0; i < height; ++i) {
const uint8x16_t a_u8 = vld1q_u8(a);
const uint8x16_t b_u8 = vld1q_u8(b);
a += a_stride;
b += b_stride;
abs = vabal_u8(abs, vget_low_u8(a_u8), vget_low_u8(b_u8));
abs = vabal_u8(abs, vget_high_u8(a_u8), vget_high_u8(b_u8));
}
return abs;
}
uint32_t vpx_sad16x8_neon(const uint8_t *src, int src_stride,
const uint8_t *ref, int ref_stride) {
const uint16x8_t abs = sad16x(src, src_stride, ref, ref_stride, 8);
return horizontal_add_16x8(abs);
}
uint32_t vpx_sad16x16_neon(const uint8_t *src, int src_stride,
const uint8_t *ref, int ref_stride) {
const uint16x8_t abs = sad16x(src, src_stride, ref, ref_stride, 16);
return horizontal_add_16x8(abs);
}
uint32_t vpx_sad16x32_neon(const uint8_t *src, int src_stride,
const uint8_t *ref, int ref_stride) {
const uint16x8_t abs = sad16x(src, src_stride, ref, ref_stride, 32);
return horizontal_add_16x8(abs);
}
static INLINE uint16x8_t sad32x(const uint8_t *a, int a_stride,
const uint8_t *b, int b_stride,
const int height) {
int i;
uint16x8_t abs = vdupq_n_u16(0);
for (i = 0; i < height; ++i) {
const uint8x16_t a_lo = vld1q_u8(a);
const uint8x16_t a_hi = vld1q_u8(a + 16);
const uint8x16_t b_lo = vld1q_u8(b);
const uint8x16_t b_hi = vld1q_u8(b + 16);
a += a_stride;
b += b_stride;
abs = vabal_u8(abs, vget_low_u8(a_lo), vget_low_u8(b_lo));
abs = vabal_u8(abs, vget_high_u8(a_lo), vget_high_u8(b_lo));
abs = vabal_u8(abs, vget_low_u8(a_hi), vget_low_u8(b_hi));
abs = vabal_u8(abs, vget_high_u8(a_hi), vget_high_u8(b_hi));
}
return abs;
}
uint32_t vpx_sad32x16_neon(const uint8_t *src, int src_stride,
const uint8_t *ref, int ref_stride) {
const uint16x8_t abs = sad32x(src, src_stride, ref, ref_stride, 16);
return horizontal_add_16x8(abs);
}
uint32_t vpx_sad32x32_neon(const uint8_t *src, int src_stride,
const uint8_t *ref, int ref_stride) {
const uint16x8_t abs = sad32x(src, src_stride, ref, ref_stride, 32);
return horizontal_add_16x8(abs);
}
uint32_t vpx_sad32x64_neon(const uint8_t *src, int src_stride,
const uint8_t *ref, int ref_stride) {
const uint16x8_t abs = sad32x(src, src_stride, ref, ref_stride, 64);
return horizontal_add_16x8(abs);
}
static INLINE uint32_t horizontal_add_32x4(const uint32x4_t a) {
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 uint32x4_t sad64x(const uint8_t *a, int a_stride,
const uint8_t *b, int b_stride,
const int height) {
int i;
uint16x8_t abs_0 = vdupq_n_u16(0);
uint16x8_t abs_1 = vdupq_n_u16(0);
for (i = 0; i < height; ++i) {
const uint8x16_t a_0 = vld1q_u8(a);
const uint8x16_t a_1 = vld1q_u8(a + 16);
const uint8x16_t a_2 = vld1q_u8(a + 32);
const uint8x16_t a_3 = vld1q_u8(a + 48);
const uint8x16_t b_0 = vld1q_u8(b);
const uint8x16_t b_1 = vld1q_u8(b + 16);
const uint8x16_t b_2 = vld1q_u8(b + 32);
const uint8x16_t b_3 = vld1q_u8(b + 48);
a += a_stride;
b += b_stride;
abs_0 = vabal_u8(abs_0, vget_low_u8(a_0), vget_low_u8(b_0));
abs_0 = vabal_u8(abs_0, vget_high_u8(a_0), vget_high_u8(b_0));
abs_0 = vabal_u8(abs_0, vget_low_u8(a_1), vget_low_u8(b_1));
abs_0 = vabal_u8(abs_0, vget_high_u8(a_1), vget_high_u8(b_1));
abs_1 = vabal_u8(abs_1, vget_low_u8(a_2), vget_low_u8(b_2));
abs_1 = vabal_u8(abs_1, vget_high_u8(a_2), vget_high_u8(b_2));
abs_1 = vabal_u8(abs_1, vget_low_u8(a_3), vget_low_u8(b_3));
abs_1 = vabal_u8(abs_1, vget_high_u8(a_3), vget_high_u8(b_3));
}
{
const uint32x4_t sum = vpaddlq_u16(abs_0);
return vpadalq_u16(sum, abs_1);
}
}
uint32_t vpx_sad64x32_neon(const uint8_t *src, int src_stride,
const uint8_t *ref, int ref_stride) {
const uint32x4_t abs = sad64x(src, src_stride, ref, ref_stride, 32);
return horizontal_add_32x4(abs);
}
uint32_t vpx_sad64x64_neon(const uint8_t *src, int src_stride,
const uint8_t *ref, int ref_stride) {
const uint32x4_t abs = sad64x(src, src_stride, ref, ref_stride, 64);
return horizontal_add_32x4(abs);
}