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/*
* Copyright (c) 2016, Alliance for Open Media. All rights reserved
*
* This source code is subject to the terms of the BSD 2 Clause License and
* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
* was not distributed with this source code in the LICENSE file, you can
* obtain it at www.aomedia.org/license/software. If the Alliance for Open
* Media Patent License 1.0 was not distributed with this source code in the
* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
*/
#include <immintrin.h> // AVX2
#include "config/aom_dsp_rtcd.h"
#include "aom_ports/mem.h"
/* clang-format off */
DECLARE_ALIGNED(32, static const uint8_t, bilinear_filters_avx2[512]) = {
16, 0, 16, 0, 16, 0, 16, 0, 16, 0, 16, 0, 16, 0, 16, 0,
16, 0, 16, 0, 16, 0, 16, 0, 16, 0, 16, 0, 16, 0, 16, 0,
14, 2, 14, 2, 14, 2, 14, 2, 14, 2, 14, 2, 14, 2, 14, 2,
14, 2, 14, 2, 14, 2, 14, 2, 14, 2, 14, 2, 14, 2, 14, 2,
12, 4, 12, 4, 12, 4, 12, 4, 12, 4, 12, 4, 12, 4, 12, 4,
12, 4, 12, 4, 12, 4, 12, 4, 12, 4, 12, 4, 12, 4, 12, 4,
10, 6, 10, 6, 10, 6, 10, 6, 10, 6, 10, 6, 10, 6, 10, 6,
10, 6, 10, 6, 10, 6, 10, 6, 10, 6, 10, 6, 10, 6, 10, 6,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
6, 10, 6, 10, 6, 10, 6, 10, 6, 10, 6, 10, 6, 10, 6, 10,
6, 10, 6, 10, 6, 10, 6, 10, 6, 10, 6, 10, 6, 10, 6, 10,
4, 12, 4, 12, 4, 12, 4, 12, 4, 12, 4, 12, 4, 12, 4, 12,
4, 12, 4, 12, 4, 12, 4, 12, 4, 12, 4, 12, 4, 12, 4, 12,
2, 14, 2, 14, 2, 14, 2, 14, 2, 14, 2, 14, 2, 14, 2, 14,
2, 14, 2, 14, 2, 14, 2, 14, 2, 14, 2, 14, 2, 14, 2, 14,
};
/* clang-format on */
#define FILTER_SRC(filter) \
/* filter the source */ \
exp_src_lo = _mm256_maddubs_epi16(exp_src_lo, filter); \
exp_src_hi = _mm256_maddubs_epi16(exp_src_hi, filter); \
\
/* add 8 to source */ \
exp_src_lo = _mm256_add_epi16(exp_src_lo, pw8); \
exp_src_hi = _mm256_add_epi16(exp_src_hi, pw8); \
\
/* divide source by 16 */ \
exp_src_lo = _mm256_srai_epi16(exp_src_lo, 4); \
exp_src_hi = _mm256_srai_epi16(exp_src_hi, 4);
#define MERGE_WITH_SRC(src_reg, reg) \
exp_src_lo = _mm256_unpacklo_epi8(src_reg, reg); \
exp_src_hi = _mm256_unpackhi_epi8(src_reg, reg);
#define LOAD_SRC_DST \
/* load source and destination */ \
src_reg = _mm256_loadu_si256((__m256i const *)(src)); \
dst_reg = _mm256_loadu_si256((__m256i const *)(dst));
#define AVG_NEXT_SRC(src_reg, size_stride) \
src_next_reg = _mm256_loadu_si256((__m256i const *)(src + size_stride)); \
/* average between current and next stride source */ \
src_reg = _mm256_avg_epu8(src_reg, src_next_reg);
#define MERGE_NEXT_SRC(src_reg, size_stride) \
src_next_reg = _mm256_loadu_si256((__m256i const *)(src + size_stride)); \
MERGE_WITH_SRC(src_reg, src_next_reg)
#define CALC_SUM_SSE_INSIDE_LOOP \
/* expand each byte to 2 bytes */ \
exp_dst_lo = _mm256_unpacklo_epi8(dst_reg, zero_reg); \
exp_dst_hi = _mm256_unpackhi_epi8(dst_reg, zero_reg); \
/* source - dest */ \
exp_src_lo = _mm256_sub_epi16(exp_src_lo, exp_dst_lo); \
exp_src_hi = _mm256_sub_epi16(exp_src_hi, exp_dst_hi); \
/* caculate sum */ \
sum_reg = _mm256_add_epi16(sum_reg, exp_src_lo); \
exp_src_lo = _mm256_madd_epi16(exp_src_lo, exp_src_lo); \
sum_reg = _mm256_add_epi16(sum_reg, exp_src_hi); \
exp_src_hi = _mm256_madd_epi16(exp_src_hi, exp_src_hi); \
/* calculate sse */ \
sse_reg = _mm256_add_epi32(sse_reg, exp_src_lo); \
sse_reg = _mm256_add_epi32(sse_reg, exp_src_hi);
// final calculation to sum and sse
#define CALC_SUM_AND_SSE \
res_cmp = _mm256_cmpgt_epi16(zero_reg, sum_reg); \
sse_reg_hi = _mm256_srli_si256(sse_reg, 8); \
sum_reg_lo = _mm256_unpacklo_epi16(sum_reg, res_cmp); \
sum_reg_hi = _mm256_unpackhi_epi16(sum_reg, res_cmp); \
sse_reg = _mm256_add_epi32(sse_reg, sse_reg_hi); \
sum_reg = _mm256_add_epi32(sum_reg_lo, sum_reg_hi); \
\
sse_reg_hi = _mm256_srli_si256(sse_reg, 4); \
sum_reg_hi = _mm256_srli_si256(sum_reg, 8); \
\
sse_reg = _mm256_add_epi32(sse_reg, sse_reg_hi); \
sum_reg = _mm256_add_epi32(sum_reg, sum_reg_hi); \
*((int *)sse) = _mm_cvtsi128_si32(_mm256_castsi256_si128(sse_reg)) + \
_mm_cvtsi128_si32(_mm256_extractf128_si256(sse_reg, 1)); \
sum_reg_hi = _mm256_srli_si256(sum_reg, 4); \
sum_reg = _mm256_add_epi32(sum_reg, sum_reg_hi); \
sum = _mm_cvtsi128_si32(_mm256_castsi256_si128(sum_reg)) + \
_mm_cvtsi128_si32(_mm256_extractf128_si256(sum_reg, 1));
// Functions related to sub pixel variance width 16
#define LOAD_SRC_DST_INSERT(src_stride, dst_stride) \
/* load source and destination of 2 rows and insert*/ \
src_reg = _mm256_inserti128_si256( \
_mm256_castsi128_si256(_mm_loadu_si128((__m128i *)(src))), \
_mm_loadu_si128((__m128i *)(src + src_stride)), 1); \
dst_reg = _mm256_inserti128_si256( \
_mm256_castsi128_si256(_mm_loadu_si128((__m128i *)(dst))), \
_mm_loadu_si128((__m128i *)(dst + dst_stride)), 1);
#define AVG_NEXT_SRC_INSERT(src_reg, size_stride) \
src_next_reg = _mm256_inserti128_si256( \
_mm256_castsi128_si256(_mm_loadu_si128((__m128i *)(src + size_stride))), \
_mm_loadu_si128((__m128i *)(src + (size_stride << 1))), 1); \
/* average between current and next stride source */ \
src_reg = _mm256_avg_epu8(src_reg, src_next_reg);
#define MERGE_NEXT_SRC_INSERT(src_reg, size_stride) \
src_next_reg = _mm256_inserti128_si256( \
_mm256_castsi128_si256(_mm_loadu_si128((__m128i *)(src + size_stride))), \
_mm_loadu_si128((__m128i *)(src + (src_stride + size_stride))), 1); \
MERGE_WITH_SRC(src_reg, src_next_reg)
#define LOAD_SRC_NEXT_BYTE_INSERT \
/* load source and another source from next row */ \
src_reg = _mm256_inserti128_si256( \
_mm256_castsi128_si256(_mm_loadu_si128((__m128i *)(src))), \
_mm_loadu_si128((__m128i *)(src + src_stride)), 1); \
/* load source and next row source from 1 byte onwards */ \
src_next_reg = _mm256_inserti128_si256( \
_mm256_castsi128_si256(_mm_loadu_si128((__m128i *)(src + 1))), \
_mm_loadu_si128((__m128i *)(src + src_stride + 1)), 1);
#define LOAD_DST_INSERT \
dst_reg = _mm256_inserti128_si256( \
_mm256_castsi128_si256(_mm_loadu_si128((__m128i *)(dst))), \
_mm_loadu_si128((__m128i *)(dst + dst_stride)), 1);
#define LOAD_SRC_MERGE_128BIT(filter) \
__m128i src_reg_0 = _mm_loadu_si128((__m128i *)(src)); \
__m128i src_reg_1 = _mm_loadu_si128((__m128i *)(src + 1)); \
__m128i src_lo = _mm_unpacklo_epi8(src_reg_0, src_reg_1); \
__m128i src_hi = _mm_unpackhi_epi8(src_reg_0, src_reg_1); \
__m128i filter_128bit = _mm256_castsi256_si128(filter); \
__m128i pw8_128bit = _mm256_castsi256_si128(pw8);
#define FILTER_SRC_128BIT(filter) \
/* filter the source */ \
src_lo = _mm_maddubs_epi16(src_lo, filter); \
src_hi = _mm_maddubs_epi16(src_hi, filter); \
\
/* add 8 to source */ \
src_lo = _mm_add_epi16(src_lo, pw8_128bit); \
src_hi = _mm_add_epi16(src_hi, pw8_128bit); \
\
/* divide source by 16 */ \
src_lo = _mm_srai_epi16(src_lo, 4); \
src_hi = _mm_srai_epi16(src_hi, 4);
unsigned int aom_sub_pixel_variance32xh_avx2(const uint8_t *src, int src_stride,
int x_offset, int y_offset,
const uint8_t *dst, int dst_stride,
int height, unsigned int *sse) {
__m256i src_reg, dst_reg, exp_src_lo, exp_src_hi, exp_dst_lo, exp_dst_hi;
__m256i sse_reg, sum_reg, sse_reg_hi, res_cmp, sum_reg_lo, sum_reg_hi;
__m256i zero_reg;
int i, sum;
sum_reg = _mm256_set1_epi16(0);
sse_reg = _mm256_set1_epi16(0);
zero_reg = _mm256_set1_epi16(0);
// x_offset = 0 and y_offset = 0
if (x_offset == 0) {
if (y_offset == 0) {
for (i = 0; i < height; i++) {
LOAD_SRC_DST
// expend each byte to 2 bytes
MERGE_WITH_SRC(src_reg, zero_reg)
CALC_SUM_SSE_INSIDE_LOOP
src += src_stride;
dst += dst_stride;
}
// x_offset = 0 and y_offset = 4
} else if (y_offset == 4) {
__m256i src_next_reg;
for (i = 0; i < height; i++) {
LOAD_SRC_DST
AVG_NEXT_SRC(src_reg, src_stride)
// expend each byte to 2 bytes
MERGE_WITH_SRC(src_reg, zero_reg)
CALC_SUM_SSE_INSIDE_LOOP
src += src_stride;
dst += dst_stride;
}
// x_offset = 0 and y_offset = bilin interpolation
} else {
__m256i filter, pw8, src_next_reg;
y_offset <<= 5;
filter = _mm256_load_si256(
(__m256i const *)(bilinear_filters_avx2 + y_offset));
pw8 = _mm256_set1_epi16(8);
for (i = 0; i < height; i++) {
LOAD_SRC_DST
MERGE_NEXT_SRC(src_reg, src_stride)
FILTER_SRC(filter)
CALC_SUM_SSE_INSIDE_LOOP
src += src_stride;
dst += dst_stride;
}
}
// x_offset = 4 and y_offset = 0
} else if (x_offset == 4) {
if (y_offset == 0) {
__m256i src_next_reg;
for (i = 0; i < height; i++) {
LOAD_SRC_DST
AVG_NEXT_SRC(src_reg, 1)
// expand each byte to 2 bytes
MERGE_WITH_SRC(src_reg, zero_reg)
CALC_SUM_SSE_INSIDE_LOOP
src += src_stride;
dst += dst_stride;
}
// x_offset = 4 and y_offset = 4
} else if (y_offset == 4) {
__m256i src_next_reg, src_avg;
// load source and another source starting from the next
// following byte
src_reg = _mm256_loadu_si256((__m256i const *)(src));
AVG_NEXT_SRC(src_reg, 1)
for (i = 0; i < height; i++) {
src_avg = src_reg;
src += src_stride;
LOAD_SRC_DST
AVG_NEXT_SRC(src_reg, 1)
// average between previous average to current average
src_avg = _mm256_avg_epu8(src_avg, src_reg);
// expand each byte to 2 bytes
MERGE_WITH_SRC(src_avg, zero_reg)
// save current source average
CALC_SUM_SSE_INSIDE_LOOP
dst += dst_stride;
}
// x_offset = 4 and y_offset = bilin interpolation
} else {
__m256i filter, pw8, src_next_reg, src_avg;
y_offset <<= 5;
filter = _mm256_load_si256(
(__m256i const *)(bilinear_filters_avx2 + y_offset));
pw8 = _mm256_set1_epi16(8);
// load source and another source starting from the next
// following byte
src_reg = _mm256_loadu_si256((__m256i const *)(src));
AVG_NEXT_SRC(src_reg, 1)
for (i = 0; i < height; i++) {
// save current source average
src_avg = src_reg;
src += src_stride;
LOAD_SRC_DST
AVG_NEXT_SRC(src_reg, 1)
MERGE_WITH_SRC(src_avg, src_reg)
FILTER_SRC(filter)
CALC_SUM_SSE_INSIDE_LOOP
dst += dst_stride;
}
}
// x_offset = bilin interpolation and y_offset = 0
} else {
if (y_offset == 0) {
__m256i filter, pw8, src_next_reg;
x_offset <<= 5;
filter = _mm256_load_si256(
(__m256i const *)(bilinear_filters_avx2 + x_offset));
pw8 = _mm256_set1_epi16(8);
for (i = 0; i < height; i++) {
LOAD_SRC_DST
MERGE_NEXT_SRC(src_reg, 1)
FILTER_SRC(filter)
CALC_SUM_SSE_INSIDE_LOOP
src += src_stride;
dst += dst_stride;
}
// x_offset = bilin interpolation and y_offset = 4
} else if (y_offset == 4) {
__m256i filter, pw8, src_next_reg, src_pack;
x_offset <<= 5;
filter = _mm256_load_si256(
(__m256i const *)(bilinear_filters_avx2 + x_offset));
pw8 = _mm256_set1_epi16(8);
src_reg = _mm256_loadu_si256((__m256i const *)(src));
MERGE_NEXT_SRC(src_reg, 1)
FILTER_SRC(filter)
// convert each 16 bit to 8 bit to each low and high lane source
src_pack = _mm256_packus_epi16(exp_src_lo, exp_src_hi);
for (i = 0; i < height; i++) {
src += src_stride;
LOAD_SRC_DST
MERGE_NEXT_SRC(src_reg, 1)
FILTER_SRC(filter)
src_reg = _mm256_packus_epi16(exp_src_lo, exp_src_hi);
// average between previous pack to the current
src_pack = _mm256_avg_epu8(src_pack, src_reg);
MERGE_WITH_SRC(src_pack, zero_reg)
CALC_SUM_SSE_INSIDE_LOOP
src_pack = src_reg;
dst += dst_stride;
}
// x_offset = bilin interpolation and y_offset = bilin interpolation
} else {
__m256i xfilter, yfilter, pw8, src_next_reg, src_pack;
x_offset <<= 5;
xfilter = _mm256_load_si256(
(__m256i const *)(bilinear_filters_avx2 + x_offset));
y_offset <<= 5;
yfilter = _mm256_load_si256(
(__m256i const *)(bilinear_filters_avx2 + y_offset));
pw8 = _mm256_set1_epi16(8);
// load source and another source starting from the next
// following byte
src_reg = _mm256_loadu_si256((__m256i const *)(src));
MERGE_NEXT_SRC(src_reg, 1)
FILTER_SRC(xfilter)
// convert each 16 bit to 8 bit to each low and high lane source
src_pack = _mm256_packus_epi16(exp_src_lo, exp_src_hi);
for (i = 0; i < height; i++) {
src += src_stride;
LOAD_SRC_DST
MERGE_NEXT_SRC(src_reg, 1)
FILTER_SRC(xfilter)
src_reg = _mm256_packus_epi16(exp_src_lo, exp_src_hi);
// merge previous pack to current pack source
MERGE_WITH_SRC(src_pack, src_reg)
// filter the source
FILTER_SRC(yfilter)
src_pack = src_reg;
CALC_SUM_SSE_INSIDE_LOOP
dst += dst_stride;
}
}
}
CALC_SUM_AND_SSE
_mm256_zeroupper();
return sum;
}
unsigned int aom_sub_pixel_variance16xh_avx2(const uint8_t *src, int src_stride,
int x_offset, int y_offset,
const uint8_t *dst, int dst_stride,
int height, unsigned int *sse) {
__m256i src_reg, dst_reg, exp_src_lo, exp_src_hi, exp_dst_lo, exp_dst_hi;
__m256i sse_reg, sum_reg, sse_reg_hi, res_cmp, sum_reg_lo, sum_reg_hi;
__m256i zero_reg;
int i, sum;
sum_reg = _mm256_set1_epi16(0);
sse_reg = _mm256_set1_epi16(0);
zero_reg = _mm256_set1_epi16(0);
// x_offset = 0 and y_offset = 0
if (x_offset == 0) {
if (y_offset == 0) {
for (i = 0; i < height; i += 2) {
LOAD_SRC_DST_INSERT(src_stride, dst_stride)
// expend each byte to 2 bytes
MERGE_WITH_SRC(src_reg, zero_reg)
CALC_SUM_SSE_INSIDE_LOOP
src += (src_stride << 1);
dst += (dst_stride << 1);
}
// x_offset = 0 and y_offset = 4
} else if (y_offset == 4) {
__m256i src_next_reg;
for (i = 0; i < height; i += 2) {
LOAD_SRC_DST_INSERT(src_stride, dst_stride)
AVG_NEXT_SRC_INSERT(src_reg, src_stride)
// expend each byte to 2 bytes
MERGE_WITH_SRC(src_reg, zero_reg)
CALC_SUM_SSE_INSIDE_LOOP
src += (src_stride << 1);
dst += (dst_stride << 1);
}
// x_offset = 0 and y_offset = bilin interpolation
} else {
__m256i filter, pw8, src_next_reg;
y_offset <<= 5;
filter = _mm256_load_si256(
(__m256i const *)(bilinear_filters_avx2 + y_offset));
pw8 = _mm256_set1_epi16(8);
for (i = 0; i < height; i += 2) {
LOAD_SRC_DST_INSERT(src_stride, dst_stride)
MERGE_NEXT_SRC_INSERT(src_reg, src_stride)
FILTER_SRC(filter)
CALC_SUM_SSE_INSIDE_LOOP
src += (src_stride << 1);
dst += (dst_stride << 1);
}
}
// x_offset = 4 and y_offset = 0
} else if (x_offset == 4) {
if (y_offset == 0) {
__m256i src_next_reg;
for (i = 0; i < height; i += 2) {
LOAD_SRC_NEXT_BYTE_INSERT
LOAD_DST_INSERT
/* average between current and next stride source */
src_reg = _mm256_avg_epu8(src_reg, src_next_reg);
// expand each byte to 2 bytes
MERGE_WITH_SRC(src_reg, zero_reg)
CALC_SUM_SSE_INSIDE_LOOP
src += (src_stride << 1);
dst += (dst_stride << 1);
}
// x_offset = 4 and y_offset = 4
} else if (y_offset == 4) {
__m256i src_next_reg, src_avg, src_temp;
// load and insert source and next row source
LOAD_SRC_NEXT_BYTE_INSERT
src_avg = _mm256_avg_epu8(src_reg, src_next_reg);
src += src_stride << 1;
for (i = 0; i < height - 2; i += 2) {
LOAD_SRC_NEXT_BYTE_INSERT
src_next_reg = _mm256_avg_epu8(src_reg, src_next_reg);
src_temp = _mm256_permute2x128_si256(src_avg, src_next_reg, 0x21);
src_temp = _mm256_avg_epu8(src_avg, src_temp);
LOAD_DST_INSERT
// expand each byte to 2 bytes
MERGE_WITH_SRC(src_temp, zero_reg)
// save current source average
src_avg = src_next_reg;
CALC_SUM_SSE_INSIDE_LOOP
dst += dst_stride << 1;
src += src_stride << 1;
}
// last 2 rows processing happens here
__m128i src_reg_0 = _mm_loadu_si128((__m128i *)(src));
__m128i src_reg_1 = _mm_loadu_si128((__m128i *)(src + 1));
src_reg_0 = _mm_avg_epu8(src_reg_0, src_reg_1);
src_next_reg = _mm256_permute2x128_si256(
src_avg, _mm256_castsi128_si256(src_reg_0), 0x21);
LOAD_DST_INSERT
src_avg = _mm256_avg_epu8(src_avg, src_next_reg);
MERGE_WITH_SRC(src_avg, zero_reg)
CALC_SUM_SSE_INSIDE_LOOP
} else {
// x_offset = 4 and y_offset = bilin interpolation
__m256i filter, pw8, src_next_reg, src_avg, src_temp;
y_offset <<= 5;
filter = _mm256_load_si256(
(__m256i const *)(bilinear_filters_avx2 + y_offset));
pw8 = _mm256_set1_epi16(8);
// load and insert source and next row source
LOAD_SRC_NEXT_BYTE_INSERT
src_avg = _mm256_avg_epu8(src_reg, src_next_reg);
src += src_stride << 1;
for (i = 0; i < height - 2; i += 2) {
LOAD_SRC_NEXT_BYTE_INSERT
src_next_reg = _mm256_avg_epu8(src_reg, src_next_reg);
src_temp = _mm256_permute2x128_si256(src_avg, src_next_reg, 0x21);
LOAD_DST_INSERT
MERGE_WITH_SRC(src_avg, src_temp)
// save current source average
src_avg = src_next_reg;
FILTER_SRC(filter)
CALC_SUM_SSE_INSIDE_LOOP
dst += dst_stride << 1;
src += src_stride << 1;
}
// last 2 rows processing happens here
__m128i src_reg_0 = _mm_loadu_si128((__m128i *)(src));
__m128i src_reg_1 = _mm_loadu_si128((__m128i *)(src + 1));
src_reg_0 = _mm_avg_epu8(src_reg_0, src_reg_1);
src_next_reg = _mm256_permute2x128_si256(
src_avg, _mm256_castsi128_si256(src_reg_0), 0x21);
LOAD_DST_INSERT
MERGE_WITH_SRC(src_avg, src_next_reg)
FILTER_SRC(filter)
CALC_SUM_SSE_INSIDE_LOOP
}
// x_offset = bilin interpolation and y_offset = 0
} else {
if (y_offset == 0) {
__m256i filter, pw8, src_next_reg;
x_offset <<= 5;
filter = _mm256_load_si256(
(__m256i const *)(bilinear_filters_avx2 + x_offset));
pw8 = _mm256_set1_epi16(8);
for (i = 0; i < height; i += 2) {
LOAD_SRC_DST_INSERT(src_stride, dst_stride)
MERGE_NEXT_SRC_INSERT(src_reg, 1)
FILTER_SRC(filter)
CALC_SUM_SSE_INSIDE_LOOP
src += (src_stride << 1);
dst += (dst_stride << 1);
}
// x_offset = bilin interpolation and y_offset = 4
} else if (y_offset == 4) {
__m256i filter, pw8, src_next_reg, src_pack;
x_offset <<= 5;
filter = _mm256_load_si256(
(__m256i const *)(bilinear_filters_avx2 + x_offset));
pw8 = _mm256_set1_epi16(8);
// load and insert source and next row source
LOAD_SRC_NEXT_BYTE_INSERT
MERGE_WITH_SRC(src_reg, src_next_reg)
FILTER_SRC(filter)
// convert each 16 bit to 8 bit to each low and high lane source
src_pack = _mm256_packus_epi16(exp_src_lo, exp_src_hi);
src += src_stride << 1;
for (i = 0; i < height - 2; i += 2) {
LOAD_SRC_NEXT_BYTE_INSERT
LOAD_DST_INSERT
MERGE_WITH_SRC(src_reg, src_next_reg)
FILTER_SRC(filter)
src_reg = _mm256_packus_epi16(exp_src_lo, exp_src_hi);
src_next_reg = _mm256_permute2x128_si256(src_pack, src_reg, 0x21);
// average between previous pack to the current
src_pack = _mm256_avg_epu8(src_pack, src_next_reg);
MERGE_WITH_SRC(src_pack, zero_reg)
CALC_SUM_SSE_INSIDE_LOOP
src_pack = src_reg;
src += src_stride << 1;
dst += dst_stride << 1;
}
// last 2 rows processing happens here
LOAD_SRC_MERGE_128BIT(filter)
LOAD_DST_INSERT
FILTER_SRC_128BIT(filter_128bit)
src_reg_0 = _mm_packus_epi16(src_lo, src_hi);
src_next_reg = _mm256_permute2x128_si256(
src_pack, _mm256_castsi128_si256(src_reg_0), 0x21);
// average between previous pack to the current
src_pack = _mm256_avg_epu8(src_pack, src_next_reg);
MERGE_WITH_SRC(src_pack, zero_reg)
CALC_SUM_SSE_INSIDE_LOOP
} else {
// x_offset = bilin interpolation and y_offset = bilin interpolation
__m256i xfilter, yfilter, pw8, src_next_reg, src_pack;
x_offset <<= 5;
xfilter = _mm256_load_si256(
(__m256i const *)(bilinear_filters_avx2 + x_offset));
y_offset <<= 5;
yfilter = _mm256_load_si256(
(__m256i const *)(bilinear_filters_avx2 + y_offset));
pw8 = _mm256_set1_epi16(8);
// load and insert source and next row source
LOAD_SRC_NEXT_BYTE_INSERT
MERGE_WITH_SRC(src_reg, src_next_reg)
FILTER_SRC(xfilter)
// convert each 16 bit to 8 bit to each low and high lane source
src_pack = _mm256_packus_epi16(exp_src_lo, exp_src_hi);
src += src_stride << 1;
for (i = 0; i < height - 2; i += 2) {
LOAD_SRC_NEXT_BYTE_INSERT
LOAD_DST_INSERT
MERGE_WITH_SRC(src_reg, src_next_reg)
FILTER_SRC(xfilter)
src_reg = _mm256_packus_epi16(exp_src_lo, exp_src_hi);
src_next_reg = _mm256_permute2x128_si256(src_pack, src_reg, 0x21);
// average between previous pack to the current
MERGE_WITH_SRC(src_pack, src_next_reg)
// filter the source
FILTER_SRC(yfilter)
src_pack = src_reg;
CALC_SUM_SSE_INSIDE_LOOP
src += src_stride << 1;
dst += dst_stride << 1;
}
// last 2 rows processing happens here
LOAD_SRC_MERGE_128BIT(xfilter)
LOAD_DST_INSERT
FILTER_SRC_128BIT(filter_128bit)
src_reg_0 = _mm_packus_epi16(src_lo, src_hi);
src_next_reg = _mm256_permute2x128_si256(
src_pack, _mm256_castsi128_si256(src_reg_0), 0x21);
MERGE_WITH_SRC(src_pack, src_next_reg)
FILTER_SRC(yfilter)
CALC_SUM_SSE_INSIDE_LOOP
}
}
CALC_SUM_AND_SSE
_mm256_zeroupper();
return sum;
}
unsigned int aom_sub_pixel_avg_variance32xh_avx2(
const uint8_t *src, int src_stride, int x_offset, int y_offset,
const uint8_t *dst, int dst_stride, const uint8_t *sec, int sec_stride,
int height, unsigned int *sse) {
__m256i sec_reg;
__m256i src_reg, dst_reg, exp_src_lo, exp_src_hi, exp_dst_lo, exp_dst_hi;
__m256i sse_reg, sum_reg, sse_reg_hi, res_cmp, sum_reg_lo, sum_reg_hi;
__m256i zero_reg;
int i, sum;
sum_reg = _mm256_set1_epi16(0);
sse_reg = _mm256_set1_epi16(0);
zero_reg = _mm256_set1_epi16(0);
// x_offset = 0 and y_offset = 0
if (x_offset == 0) {
if (y_offset == 0) {
for (i = 0; i < height; i++) {
LOAD_SRC_DST
sec_reg = _mm256_loadu_si256((__m256i const *)(sec));
src_reg = _mm256_avg_epu8(src_reg, sec_reg);
sec += sec_stride;
// expend each byte to 2 bytes
MERGE_WITH_SRC(src_reg, zero_reg)
CALC_SUM_SSE_INSIDE_LOOP
src += src_stride;
dst += dst_stride;
}
} else if (y_offset == 8) {
__m256i src_next_reg;
for (i = 0; i < height; i++) {
LOAD_SRC_DST
AVG_NEXT_SRC(src_reg, src_stride)
sec_reg = _mm256_loadu_si256((__m256i const *)(sec));
src_reg = _mm256_avg_epu8(src_reg, sec_reg);
sec += sec_stride;
// expend each byte to 2 bytes
MERGE_WITH_SRC(src_reg, zero_reg)
CALC_SUM_SSE_INSIDE_LOOP
src += src_stride;
dst += dst_stride;
}
// x_offset = 0 and y_offset = bilin interpolation
} else {
__m256i filter, pw8, src_next_reg;
y_offset <<= 5;
filter = _mm256_load_si256(
(__m256i const *)(bilinear_filters_avx2 + y_offset));
pw8 = _mm256_set1_epi16(8);
for (i = 0; i < height; i++) {
LOAD_SRC_DST
MERGE_NEXT_SRC(src_reg, src_stride)
FILTER_SRC(filter)
src_reg = _mm256_packus_epi16(exp_src_lo, exp_src_hi);
sec_reg = _mm256_loadu_si256((__m256i const *)(sec));
src_reg = _mm256_avg_epu8(src_reg, sec_reg);
sec += sec_stride;
MERGE_WITH_SRC(src_reg, zero_reg)
CALC_SUM_SSE_INSIDE_LOOP
src += src_stride;
dst += dst_stride;
}
}
// x_offset = 8 and y_offset = 0
} else if (x_offset == 8) {
if (y_offset == 0) {
__m256i src_next_reg;
for (i = 0; i < height; i++) {
LOAD_SRC_DST
AVG_NEXT_SRC(src_reg, 1)
sec_reg = _mm256_loadu_si256((__m256i const *)(sec));
src_reg = _mm256_avg_epu8(src_reg, sec_reg);
sec += sec_stride;
// expand each byte to 2 bytes
MERGE_WITH_SRC(src_reg, zero_reg)
CALC_SUM_SSE_INSIDE_LOOP
src += src_stride;
dst += dst_stride;
}
// x_offset = 8 and y_offset = 8
} else if (y_offset == 8) {
__m256i src_next_reg, src_avg;
// load source and another source starting from the next
// following byte
src_reg = _mm256_loadu_si256((__m256i const *)(src));
AVG_NEXT_SRC(src_reg, 1)
for (i = 0; i < height; i++) {
// save current source average
src_avg = src_reg;
src += src_stride;
LOAD_SRC_DST
AVG_NEXT_SRC(src_reg, 1)
// average between previous average to current average
src_avg = _mm256_avg_epu8(src_avg, src_reg);
sec_reg = _mm256_loadu_si256((__m256i const *)(sec));
src_avg = _mm256_avg_epu8(src_avg, sec_reg);
sec += sec_stride;
// expand each byte to 2 bytes
MERGE_WITH_SRC(src_avg, zero_reg)
CALC_SUM_SSE_INSIDE_LOOP
dst += dst_stride;
}
// x_offset = 8 and y_offset = bilin interpolation
} else {
__m256i filter, pw8, src_next_reg, src_avg;
y_offset <<= 5;
filter = _mm256_load_si256(
(__m256i const *)(bilinear_filters_avx2 + y_offset));
pw8 = _mm256_set1_epi16(8);
// load source and another source starting from the next
// following byte
src_reg = _mm256_loadu_si256((__m256i const *)(src));
AVG_NEXT_SRC(src_reg, 1)
for (i = 0; i < height; i++) {
// save current source average
src_avg = src_reg;
src += src_stride;
LOAD_SRC_DST
AVG_NEXT_SRC(src_reg, 1)
MERGE_WITH_SRC(src_avg, src_reg)
FILTER_SRC(filter)
src_avg = _mm256_packus_epi16(exp_src_lo, exp_src_hi);
sec_reg = _mm256_loadu_si256((__m256i const *)(sec));
src_avg = _mm256_avg_epu8(src_avg, sec_reg);
// expand each byte to 2 bytes
MERGE_WITH_SRC(src_avg, zero_reg)
sec += sec_stride;
CALC_SUM_SSE_INSIDE_LOOP
dst += dst_stride;
}
}
// x_offset = bilin interpolation and y_offset = 0
} else {
if (y_offset == 0) {
__m256i filter, pw8, src_next_reg;
x_offset <<= 5;
filter = _mm256_load_si256(
(__m256i const *)(bilinear_filters_avx2 + x_offset));
pw8 = _mm256_set1_epi16(8);
for (i = 0; i < height; i++) {
LOAD_SRC_DST
MERGE_NEXT_SRC(src_reg, 1)
FILTER_SRC(filter)
src_reg = _mm256_packus_epi16(exp_src_lo, exp_src_hi);
sec_reg = _mm256_loadu_si256((__m256i const *)(sec));
src_reg = _mm256_avg_epu8(src_reg, sec_reg);
MERGE_WITH_SRC(src_reg, zero_reg)
sec += sec_stride;
CALC_SUM_SSE_INSIDE_LOOP
src += src_stride;
dst += dst_stride;
}
// x_offset = bilin interpolation and y_offset = 8
} else if (y_offset == 8) {
__m256i filter, pw8, src_next_reg, src_pack;
x_offset <<= 5;
filter = _mm256_load_si256(
(__m256i const *)(bilinear_filters_avx2 + x_offset));
pw8 = _mm256_set1_epi16(8);
src_reg = _mm256_loadu_si256((__m256i const *)(src));
MERGE_NEXT_SRC(src_reg, 1)
FILTER_SRC(filter)
// convert each 16 bit to 8 bit to each low and high lane source
src_pack = _mm256_packus_epi16(exp_src_lo, exp_src_hi);
for (i = 0; i < height; i++) {
src += src_stride;
LOAD_SRC_DST
MERGE_NEXT_SRC(src_reg, 1)
FILTER_SRC(filter)
src_reg = _mm256_packus_epi16(exp_src_lo, exp_src_hi);
// average between previous pack to the current
src_pack = _mm256_avg_epu8(src_pack, src_reg);
sec_reg = _mm256_loadu_si256((__m256i const *)(sec));
src_pack = _mm256_avg_epu8(src_pack, sec_reg);
sec += sec_stride;
MERGE_WITH_SRC(src_pack, zero_reg)
src_pack = src_reg;
CALC_SUM_SSE_INSIDE_LOOP
dst += dst_stride;
}
// x_offset = bilin interpolation and y_offset = bilin interpolation
} else {
__m256i xfilter, yfilter, pw8, src_next_reg, src_pack;
x_offset <<= 5;
xfilter = _mm256_load_si256(
(__m256i const *)(bilinear_filters_avx2 + x_offset));
y_offset <<= 5;
yfilter = _mm256_load_si256(
(__m256i const *)(bilinear_filters_avx2 + y_offset));
pw8 = _mm256_set1_epi16(8);
// load source and another source starting from the next
// following byte
src_reg = _mm256_loadu_si256((__m256i const *)(src));
MERGE_NEXT_SRC(src_reg, 1)
FILTER_SRC(xfilter)
// convert each 16 bit to 8 bit to each low and high lane source
src_pack = _mm256_packus_epi16(exp_src_lo, exp_src_hi);
for (i = 0; i < height; i++) {
src += src_stride;
LOAD_SRC_DST
MERGE_NEXT_SRC(src_reg, 1)
FILTER_SRC(xfilter)
src_reg = _mm256_packus_epi16(exp_src_lo, exp_src_hi);
// merge previous pack to current pack source
MERGE_WITH_SRC(src_pack, src_reg)
// filter the source
FILTER_SRC(yfilter)
src_pack = _mm256_packus_epi16(exp_src_lo, exp_src_hi);
sec_reg = _mm256_loadu_si256((__m256i const *)(sec));
src_pack = _mm256_avg_epu8(src_pack, sec_reg);
MERGE_WITH_SRC(src_pack, zero_reg)
src_pack = src_reg;
sec += sec_stride;
CALC_SUM_SSE_INSIDE_LOOP
dst += dst_stride;
}
}
}
CALC_SUM_AND_SSE
_mm256_zeroupper();
return sum;
}
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