ref: 3818a3723b630252973ca85d9fc6b5dd7f8437dd
dir: /vpx_dsp/arm/sad4d_neon.c/
/*
* Copyright (c) 2015 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_dsp_rtcd.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);
}
// Calculate the absolute difference of 64 bytes from vec_src_00, vec_src_16,
// vec_src_32, vec_src_48 and ref. Accumulate partial sums in vec_sum_ref_lo
// and vec_sum_ref_hi.
static void sad_neon_64(const uint8x16_t vec_src_00,
const uint8x16_t vec_src_16,
const uint8x16_t vec_src_32,
const uint8x16_t vec_src_48, const uint8_t *ref,
uint16x8_t *vec_sum_ref_lo,
uint16x8_t *vec_sum_ref_hi) {
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);
*vec_sum_ref_lo = vabal_u8(*vec_sum_ref_lo, vget_low_u8(vec_src_00),
vget_low_u8(vec_ref_00));
*vec_sum_ref_hi = vabal_u8(*vec_sum_ref_hi, vget_high_u8(vec_src_00),
vget_high_u8(vec_ref_00));
*vec_sum_ref_lo = vabal_u8(*vec_sum_ref_lo, vget_low_u8(vec_src_16),
vget_low_u8(vec_ref_16));
*vec_sum_ref_hi = vabal_u8(*vec_sum_ref_hi, vget_high_u8(vec_src_16),
vget_high_u8(vec_ref_16));
*vec_sum_ref_lo = vabal_u8(*vec_sum_ref_lo, vget_low_u8(vec_src_32),
vget_low_u8(vec_ref_32));
*vec_sum_ref_hi = vabal_u8(*vec_sum_ref_hi, vget_high_u8(vec_src_32),
vget_high_u8(vec_ref_32));
*vec_sum_ref_lo = vabal_u8(*vec_sum_ref_lo, vget_low_u8(vec_src_48),
vget_low_u8(vec_ref_48));
*vec_sum_ref_hi = vabal_u8(*vec_sum_ref_hi, vget_high_u8(vec_src_48),
vget_high_u8(vec_ref_48));
}
// Calculate the absolute difference of 32 bytes from vec_src_00, vec_src_16,
// and ref. Accumulate partial sums in vec_sum_ref_lo and vec_sum_ref_hi.
static void sad_neon_32(const uint8x16_t vec_src_00,
const uint8x16_t vec_src_16, const uint8_t *ref,
uint16x8_t *vec_sum_ref_lo,
uint16x8_t *vec_sum_ref_hi) {
const uint8x16_t vec_ref_00 = vld1q_u8(ref);
const uint8x16_t vec_ref_16 = vld1q_u8(ref + 16);
*vec_sum_ref_lo = vabal_u8(*vec_sum_ref_lo, vget_low_u8(vec_src_00),
vget_low_u8(vec_ref_00));
*vec_sum_ref_hi = vabal_u8(*vec_sum_ref_hi, vget_high_u8(vec_src_00),
vget_high_u8(vec_ref_00));
*vec_sum_ref_lo = vabal_u8(*vec_sum_ref_lo, vget_low_u8(vec_src_16),
vget_low_u8(vec_ref_16));
*vec_sum_ref_hi = vabal_u8(*vec_sum_ref_hi, vget_high_u8(vec_src_16),
vget_high_u8(vec_ref_16));
}
void vpx_sad64x64x4d_neon(const uint8_t *src, int src_stride,
const uint8_t *const ref[4], int ref_stride,
uint32_t *res) {
int i;
uint16x8_t vec_sum_ref0_lo = vdupq_n_u16(0);
uint16x8_t vec_sum_ref0_hi = vdupq_n_u16(0);
uint16x8_t vec_sum_ref1_lo = vdupq_n_u16(0);
uint16x8_t vec_sum_ref1_hi = vdupq_n_u16(0);
uint16x8_t vec_sum_ref2_lo = vdupq_n_u16(0);
uint16x8_t vec_sum_ref2_hi = vdupq_n_u16(0);
uint16x8_t vec_sum_ref3_lo = vdupq_n_u16(0);
uint16x8_t vec_sum_ref3_hi = vdupq_n_u16(0);
const uint8_t *ref0, *ref1, *ref2, *ref3;
ref0 = ref[0];
ref1 = ref[1];
ref2 = ref[2];
ref3 = ref[3];
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);
sad_neon_64(vec_src_00, vec_src_16, vec_src_32, vec_src_48, ref0,
&vec_sum_ref0_lo, &vec_sum_ref0_hi);
sad_neon_64(vec_src_00, vec_src_16, vec_src_32, vec_src_48, ref1,
&vec_sum_ref1_lo, &vec_sum_ref1_hi);
sad_neon_64(vec_src_00, vec_src_16, vec_src_32, vec_src_48, ref2,
&vec_sum_ref2_lo, &vec_sum_ref2_hi);
sad_neon_64(vec_src_00, vec_src_16, vec_src_32, vec_src_48, ref3,
&vec_sum_ref3_lo, &vec_sum_ref3_hi);
src += src_stride;
ref0 += ref_stride;
ref1 += ref_stride;
ref2 += ref_stride;
ref3 += ref_stride;
}
res[0] = horizontal_long_add_16x8(vec_sum_ref0_lo, vec_sum_ref0_hi);
res[1] = horizontal_long_add_16x8(vec_sum_ref1_lo, vec_sum_ref1_hi);
res[2] = horizontal_long_add_16x8(vec_sum_ref2_lo, vec_sum_ref2_hi);
res[3] = horizontal_long_add_16x8(vec_sum_ref3_lo, vec_sum_ref3_hi);
}
void vpx_sad32x32x4d_neon(const uint8_t *src, int src_stride,
const uint8_t *const ref[4], int ref_stride,
uint32_t *res) {
int i;
uint16x8_t vec_sum_ref0_lo = vdupq_n_u16(0);
uint16x8_t vec_sum_ref0_hi = vdupq_n_u16(0);
uint16x8_t vec_sum_ref1_lo = vdupq_n_u16(0);
uint16x8_t vec_sum_ref1_hi = vdupq_n_u16(0);
uint16x8_t vec_sum_ref2_lo = vdupq_n_u16(0);
uint16x8_t vec_sum_ref2_hi = vdupq_n_u16(0);
uint16x8_t vec_sum_ref3_lo = vdupq_n_u16(0);
uint16x8_t vec_sum_ref3_hi = vdupq_n_u16(0);
const uint8_t *ref0, *ref1, *ref2, *ref3;
ref0 = ref[0];
ref1 = ref[1];
ref2 = ref[2];
ref3 = ref[3];
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);
sad_neon_32(vec_src_00, vec_src_16, ref0, &vec_sum_ref0_lo,
&vec_sum_ref0_hi);
sad_neon_32(vec_src_00, vec_src_16, ref1, &vec_sum_ref1_lo,
&vec_sum_ref1_hi);
sad_neon_32(vec_src_00, vec_src_16, ref2, &vec_sum_ref2_lo,
&vec_sum_ref2_hi);
sad_neon_32(vec_src_00, vec_src_16, ref3, &vec_sum_ref3_lo,
&vec_sum_ref3_hi);
src += src_stride;
ref0 += ref_stride;
ref1 += ref_stride;
ref2 += ref_stride;
ref3 += ref_stride;
}
res[0] = horizontal_long_add_16x8(vec_sum_ref0_lo, vec_sum_ref0_hi);
res[1] = horizontal_long_add_16x8(vec_sum_ref1_lo, vec_sum_ref1_hi);
res[2] = horizontal_long_add_16x8(vec_sum_ref2_lo, vec_sum_ref2_hi);
res[3] = horizontal_long_add_16x8(vec_sum_ref3_lo, vec_sum_ref3_hi);
}
void vpx_sad16x16x4d_neon(const uint8_t *src, int src_stride,
const uint8_t *const ref[4], int ref_stride,
uint32_t *res) {
int i;
uint16x8_t vec_sum_ref0_lo = vdupq_n_u16(0);
uint16x8_t vec_sum_ref0_hi = vdupq_n_u16(0);
uint16x8_t vec_sum_ref1_lo = vdupq_n_u16(0);
uint16x8_t vec_sum_ref1_hi = vdupq_n_u16(0);
uint16x8_t vec_sum_ref2_lo = vdupq_n_u16(0);
uint16x8_t vec_sum_ref2_hi = vdupq_n_u16(0);
uint16x8_t vec_sum_ref3_lo = vdupq_n_u16(0);
uint16x8_t vec_sum_ref3_hi = vdupq_n_u16(0);
const uint8_t *ref0, *ref1, *ref2, *ref3;
ref0 = ref[0];
ref1 = ref[1];
ref2 = ref[2];
ref3 = ref[3];
for (i = 0; i < 16; ++i) {
const uint8x16_t vec_src = vld1q_u8(src);
const uint8x16_t vec_ref0 = vld1q_u8(ref0);
const uint8x16_t vec_ref1 = vld1q_u8(ref1);
const uint8x16_t vec_ref2 = vld1q_u8(ref2);
const uint8x16_t vec_ref3 = vld1q_u8(ref3);
vec_sum_ref0_lo =
vabal_u8(vec_sum_ref0_lo, vget_low_u8(vec_src), vget_low_u8(vec_ref0));
vec_sum_ref0_hi = vabal_u8(vec_sum_ref0_hi, vget_high_u8(vec_src),
vget_high_u8(vec_ref0));
vec_sum_ref1_lo =
vabal_u8(vec_sum_ref1_lo, vget_low_u8(vec_src), vget_low_u8(vec_ref1));
vec_sum_ref1_hi = vabal_u8(vec_sum_ref1_hi, vget_high_u8(vec_src),
vget_high_u8(vec_ref1));
vec_sum_ref2_lo =
vabal_u8(vec_sum_ref2_lo, vget_low_u8(vec_src), vget_low_u8(vec_ref2));
vec_sum_ref2_hi = vabal_u8(vec_sum_ref2_hi, vget_high_u8(vec_src),
vget_high_u8(vec_ref2));
vec_sum_ref3_lo =
vabal_u8(vec_sum_ref3_lo, vget_low_u8(vec_src), vget_low_u8(vec_ref3));
vec_sum_ref3_hi = vabal_u8(vec_sum_ref3_hi, vget_high_u8(vec_src),
vget_high_u8(vec_ref3));
src += src_stride;
ref0 += ref_stride;
ref1 += ref_stride;
ref2 += ref_stride;
ref3 += ref_stride;
}
res[0] = horizontal_long_add_16x8(vec_sum_ref0_lo, vec_sum_ref0_hi);
res[1] = horizontal_long_add_16x8(vec_sum_ref1_lo, vec_sum_ref1_hi);
res[2] = horizontal_long_add_16x8(vec_sum_ref2_lo, vec_sum_ref2_hi);
res[3] = horizontal_long_add_16x8(vec_sum_ref3_lo, vec_sum_ref3_hi);
}