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/*
* Copyright (c) 2018, 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>
#include "config/aom_dsp_rtcd.h"
#include "aom_dsp/x86/convolve_avx2.h"
#include "aom_dsp/x86/convolve_common_intrin.h"
#include "aom_dsp/x86/convolve_sse4_1.h"
#include "aom_dsp/aom_dsp_common.h"
#include "aom_dsp/aom_filter.h"
#include "av1/common/convolve.h"
static INLINE __m256i unpack_weights_avx2(ConvolveParams *conv_params) {
const int w0 = conv_params->fwd_offset;
const int w1 = conv_params->bck_offset;
const __m256i wt0 = _mm256_set1_epi16(w0);
const __m256i wt1 = _mm256_set1_epi16(w1);
const __m256i wt = _mm256_unpacklo_epi16(wt0, wt1);
return wt;
}
static INLINE __m256i load_line2_avx2(const void *a, const void *b) {
return _mm256_permute2x128_si256(
_mm256_castsi128_si256(_mm_loadu_si128((__m128i *)a)),
_mm256_castsi128_si256(_mm_loadu_si128((__m128i *)b)), 0x20);
}
void av1_jnt_convolve_x_avx2(const uint8_t *src, int src_stride, uint8_t *dst0,
int dst_stride0, int w, int h,
const InterpFilterParams *filter_params_x,
const InterpFilterParams *filter_params_y,
const int subpel_x_q4, const int subpel_y_q4,
ConvolveParams *conv_params) {
CONV_BUF_TYPE *dst = conv_params->dst;
int dst_stride = conv_params->dst_stride;
const int bd = 8;
int i, j;
const int fo_horiz = filter_params_x->taps / 2 - 1;
const uint8_t *const src_ptr = src - fo_horiz;
const int bits = FILTER_BITS - conv_params->round_1;
const __m256i wt = unpack_weights_avx2(conv_params);
const int do_average = conv_params->do_average;
const int use_jnt_comp_avg = conv_params->use_jnt_comp_avg;
const int offset_0 =
bd + 2 * FILTER_BITS - conv_params->round_0 - conv_params->round_1;
const int offset = (1 << offset_0) + (1 << (offset_0 - 1));
const __m256i offset_const = _mm256_set1_epi16(offset);
const int rounding_shift =
2 * FILTER_BITS - conv_params->round_0 - conv_params->round_1;
const __m256i rounding_const = _mm256_set1_epi16((1 << rounding_shift) >> 1);
__m256i filt[4], coeffs[4];
assert(bits >= 0);
assert(conv_params->round_0 > 0);
filt[0] = _mm256_load_si256((__m256i const *)filt_global_avx2);
filt[1] = _mm256_load_si256((__m256i const *)(filt_global_avx2 + 32));
filt[2] = _mm256_load_si256((__m256i const *)(filt_global_avx2 + 32 * 2));
filt[3] = _mm256_load_si256((__m256i const *)(filt_global_avx2 + 32 * 3));
prepare_coeffs_lowbd(filter_params_x, subpel_x_q4, coeffs);
const __m256i round_const =
_mm256_set1_epi16((1 << (conv_params->round_0 - 1)) >> 1);
const __m128i round_shift = _mm_cvtsi32_si128(conv_params->round_0 - 1);
(void)filter_params_y;
(void)subpel_y_q4;
for (i = 0; i < h; i += 2) {
const uint8_t *src_data = src_ptr + i * src_stride;
CONV_BUF_TYPE *dst_data = dst + i * dst_stride;
for (j = 0; j < w; j += 8) {
const __m256i data =
load_line2_avx2(&src_data[j], &src_data[j + src_stride]);
__m256i res = convolve_lowbd_x(data, coeffs, filt);
res = _mm256_sra_epi16(_mm256_add_epi16(res, round_const), round_shift);
res = _mm256_slli_epi16(res, bits);
const __m256i res_unsigned = _mm256_add_epi16(res, offset_const);
// Accumulate values into the destination buffer
if (do_average) {
const __m256i data_ref_0 =
load_line2_avx2(&dst_data[j], &dst_data[j + dst_stride]);
const __m256i comp_avg_res =
comp_avg(&data_ref_0, &res_unsigned, &wt, use_jnt_comp_avg);
const __m256i round_result = convolve_rounding(
&comp_avg_res, &offset_const, &rounding_const, rounding_shift);
const __m256i res_8 = _mm256_packus_epi16(round_result, round_result);
const __m128i res_0 = _mm256_castsi256_si128(res_8);
const __m128i res_1 = _mm256_extracti128_si256(res_8, 1);
if (w > 4) {
_mm_storel_epi64((__m128i *)(&dst0[i * dst_stride0 + j]), res_0);
_mm_storel_epi64(
(__m128i *)((&dst0[i * dst_stride0 + j + dst_stride0])), res_1);
} else {
*(uint32_t *)(&dst0[i * dst_stride0 + j]) = _mm_cvtsi128_si32(res_0);
*(uint32_t *)(&dst0[i * dst_stride0 + j + dst_stride0]) =
_mm_cvtsi128_si32(res_1);
}
} else {
const __m128i res_0 = _mm256_castsi256_si128(res_unsigned);
_mm_store_si128((__m128i *)(&dst[i * dst_stride + j]), res_0);
const __m128i res_1 = _mm256_extracti128_si256(res_unsigned, 1);
_mm_store_si128((__m128i *)(&dst[i * dst_stride + j + dst_stride]),
res_1);
}
}
}
}
void av1_jnt_convolve_y_avx2(const uint8_t *src, int src_stride, uint8_t *dst0,
int dst_stride0, int w, int h,
const InterpFilterParams *filter_params_x,
const InterpFilterParams *filter_params_y,
const int subpel_x_q4, const int subpel_y_q4,
ConvolveParams *conv_params) {
CONV_BUF_TYPE *dst = conv_params->dst;
int dst_stride = conv_params->dst_stride;
const int bd = 8;
int i, j;
const int fo_vert = filter_params_y->taps / 2 - 1;
const uint8_t *const src_ptr = src - fo_vert * src_stride;
// +1 to compensate for dividing the filter coeffs by 2
const int left_shift = FILTER_BITS - conv_params->round_0 + 1;
const __m256i round_const =
_mm256_set1_epi32((1 << conv_params->round_1) >> 1);
const __m128i round_shift = _mm_cvtsi32_si128(conv_params->round_1);
const __m256i wt = unpack_weights_avx2(conv_params);
const int do_average = conv_params->do_average;
const int use_jnt_comp_avg = conv_params->use_jnt_comp_avg;
const int offset_0 =
bd + 2 * FILTER_BITS - conv_params->round_0 - conv_params->round_1;
const int offset = (1 << offset_0) + (1 << (offset_0 - 1));
const __m256i offset_const = _mm256_set1_epi16(offset);
const int offset_1 = (1 << (bd + FILTER_BITS - 2));
const __m256i offset_const_1 = _mm256_set1_epi16(offset_1);
const __m256i offset_const_2 = _mm256_set1_epi16((1 << offset_0));
const int rounding_shift =
2 * FILTER_BITS - conv_params->round_0 - conv_params->round_1;
const __m256i rounding_const = _mm256_set1_epi16((1 << rounding_shift) >> 1);
const __m256i zero = _mm256_setzero_si256();
__m256i coeffs[4], s[8];
assert((FILTER_BITS - conv_params->round_0) >= 0);
prepare_coeffs_lowbd(filter_params_y, subpel_y_q4, coeffs);
(void)conv_params;
(void)filter_params_x;
(void)subpel_x_q4;
for (j = 0; j < w; j += 16) {
const uint8_t *data = &src_ptr[j];
__m256i src6;
// Load lines a and b. Line a to lower 128, line b to upper 128
{
__m256i src_ab[7];
__m256i src_a[7];
src_a[0] = _mm256_castsi128_si256(_mm_loadu_si128((__m128i *)data));
for (int kk = 0; kk < 6; ++kk) {
data += src_stride;
src_a[kk + 1] =
_mm256_castsi128_si256(_mm_loadu_si128((__m128i *)data));
src_ab[kk] = _mm256_permute2x128_si256(src_a[kk], src_a[kk + 1], 0x20);
}
src6 = src_a[6];
s[0] = _mm256_unpacklo_epi8(src_ab[0], src_ab[1]);
s[1] = _mm256_unpacklo_epi8(src_ab[2], src_ab[3]);
s[2] = _mm256_unpacklo_epi8(src_ab[4], src_ab[5]);
s[4] = _mm256_unpackhi_epi8(src_ab[0], src_ab[1]);
s[5] = _mm256_unpackhi_epi8(src_ab[2], src_ab[3]);
s[6] = _mm256_unpackhi_epi8(src_ab[4], src_ab[5]);
}
for (i = 0; i < h; i += 2) {
data = &src_ptr[(i + 7) * src_stride + j];
const __m256i src7 =
_mm256_castsi128_si256(_mm_loadu_si128((__m128i *)data));
const __m256i src_67a = _mm256_permute2x128_si256(src6, src7, 0x20);
src6 = _mm256_castsi128_si256(
_mm_loadu_si128((__m128i *)(data + src_stride)));
const __m256i src_78a = _mm256_permute2x128_si256(src7, src6, 0x20);
s[3] = _mm256_unpacklo_epi8(src_67a, src_78a);
s[7] = _mm256_unpackhi_epi8(src_67a, src_78a);
__m256i res_lo = convolve_lowbd(s, coeffs);
res_lo = _mm256_add_epi16(res_lo, offset_const_1);
const __m256i res_lo_0_32b = _mm256_unpacklo_epi16(res_lo, zero);
const __m256i res_lo_0_shift =
_mm256_slli_epi32(res_lo_0_32b, left_shift);
const __m256i res_lo_0_round = _mm256_sra_epi32(
_mm256_add_epi32(res_lo_0_shift, round_const), round_shift);
const __m256i res_lo_1_32b = _mm256_unpackhi_epi16(res_lo, zero);
const __m256i res_lo_1_shift =
_mm256_slli_epi32(res_lo_1_32b, left_shift);
const __m256i res_lo_1_round = _mm256_sra_epi32(
_mm256_add_epi32(res_lo_1_shift, round_const), round_shift);
const __m256i res_lo_round =
_mm256_packs_epi32(res_lo_0_round, res_lo_1_round);
const __m256i res_lo_unsigned =
_mm256_add_epi16(res_lo_round, offset_const_2);
if (w - j < 16) {
if (do_average) {
const __m256i data_ref_0 = load_line2_avx2(
&dst[i * dst_stride + j], &dst[i * dst_stride + j + dst_stride]);
const __m256i comp_avg_res =
comp_avg(&data_ref_0, &res_lo_unsigned, &wt, use_jnt_comp_avg);
const __m256i round_result = convolve_rounding(
&comp_avg_res, &offset_const, &rounding_const, rounding_shift);
const __m256i res_8 = _mm256_packus_epi16(round_result, round_result);
const __m128i res_0 = _mm256_castsi256_si128(res_8);
const __m128i res_1 = _mm256_extracti128_si256(res_8, 1);
if (w - j > 4) {
_mm_storel_epi64((__m128i *)(&dst0[i * dst_stride0 + j]), res_0);
_mm_storel_epi64(
(__m128i *)((&dst0[i * dst_stride0 + j + dst_stride0])), res_1);
} else {
*(uint32_t *)(&dst0[i * dst_stride0 + j]) =
_mm_cvtsi128_si32(res_0);
*(uint32_t *)(&dst0[i * dst_stride0 + j + dst_stride0]) =
_mm_cvtsi128_si32(res_1);
}
} else {
const __m128i res_0 = _mm256_castsi256_si128(res_lo_unsigned);
_mm_store_si128((__m128i *)(&dst[i * dst_stride + j]), res_0);
const __m128i res_1 = _mm256_extracti128_si256(res_lo_unsigned, 1);
_mm_store_si128((__m128i *)(&dst[i * dst_stride + j + dst_stride]),
res_1);
}
} else {
__m256i res_hi = convolve_lowbd(s + 4, coeffs);
res_hi = _mm256_add_epi16(res_hi, offset_const_1);
const __m256i res_hi_0_32b = _mm256_unpacklo_epi16(res_hi, zero);
const __m256i res_hi_0_shift =
_mm256_slli_epi32(res_hi_0_32b, left_shift);
const __m256i res_hi_0_round = _mm256_sra_epi32(
_mm256_add_epi32(res_hi_0_shift, round_const), round_shift);
const __m256i res_hi_1_32b = _mm256_unpackhi_epi16(res_hi, zero);
const __m256i res_hi_1_shift =
_mm256_slli_epi32(res_hi_1_32b, left_shift);
const __m256i res_hi_1_round = _mm256_sra_epi32(
_mm256_add_epi32(res_hi_1_shift, round_const), round_shift);
const __m256i res_hi_round =
_mm256_packs_epi32(res_hi_0_round, res_hi_1_round);
const __m256i res_hi_unsigned =
_mm256_add_epi16(res_hi_round, offset_const_2);
if (do_average) {
const __m256i data_ref_0_lo = load_line2_avx2(
&dst[i * dst_stride + j], &dst[i * dst_stride + j + dst_stride]);
const __m256i data_ref_0_hi =
load_line2_avx2(&dst[i * dst_stride + j + 8],
&dst[i * dst_stride + j + 8 + dst_stride]);
const __m256i comp_avg_res_lo =
comp_avg(&data_ref_0_lo, &res_lo_unsigned, &wt, use_jnt_comp_avg);
const __m256i comp_avg_res_hi =
comp_avg(&data_ref_0_hi, &res_hi_unsigned, &wt, use_jnt_comp_avg);
const __m256i round_result_lo = convolve_rounding(
&comp_avg_res_lo, &offset_const, &rounding_const, rounding_shift);
const __m256i round_result_hi = convolve_rounding(
&comp_avg_res_hi, &offset_const, &rounding_const, rounding_shift);
const __m256i res_8 =
_mm256_packus_epi16(round_result_lo, round_result_hi);
const __m128i res_0 = _mm256_castsi256_si128(res_8);
const __m128i res_1 = _mm256_extracti128_si256(res_8, 1);
_mm_store_si128((__m128i *)(&dst0[i * dst_stride0 + j]), res_0);
_mm_store_si128(
(__m128i *)((&dst0[i * dst_stride0 + j + dst_stride0])), res_1);
} else {
const __m128i res_lo_0 = _mm256_castsi256_si128(res_lo_unsigned);
_mm_store_si128((__m128i *)(&dst[i * dst_stride + j]), res_lo_0);
const __m128i res_lo_1 = _mm256_extracti128_si256(res_lo_unsigned, 1);
_mm_store_si128((__m128i *)(&dst[i * dst_stride + j + dst_stride]),
res_lo_1);
const __m128i res_hi_0 = _mm256_castsi256_si128(res_hi_unsigned);
_mm_store_si128((__m128i *)(&dst[i * dst_stride + j + 8]), res_hi_0);
const __m128i res_hi_1 = _mm256_extracti128_si256(res_hi_unsigned, 1);
_mm_store_si128(
(__m128i *)(&dst[i * dst_stride + j + 8 + dst_stride]), res_hi_1);
}
}
s[0] = s[1];
s[1] = s[2];
s[2] = s[3];
s[4] = s[5];
s[5] = s[6];
s[6] = s[7];
}
}
}
void av1_jnt_convolve_2d_avx2(const uint8_t *src, int src_stride, uint8_t *dst0,
int dst_stride0, int w, int h,
const InterpFilterParams *filter_params_x,
const InterpFilterParams *filter_params_y,
const int subpel_x_q4, const int subpel_y_q4,
ConvolveParams *conv_params) {
CONV_BUF_TYPE *dst = conv_params->dst;
int dst_stride = conv_params->dst_stride;
const int bd = 8;
DECLARE_ALIGNED(32, int16_t, im_block[(MAX_SB_SIZE + MAX_FILTER_TAP) * 8]);
int im_h = h + filter_params_y->taps - 1;
int im_stride = 8;
int i, j;
const int fo_vert = filter_params_y->taps / 2 - 1;
const int fo_horiz = filter_params_x->taps / 2 - 1;
const uint8_t *const src_ptr = src - fo_vert * src_stride - fo_horiz;
const __m256i wt = unpack_weights_avx2(conv_params);
const int do_average = conv_params->do_average;
const int use_jnt_comp_avg = conv_params->use_jnt_comp_avg;
const int offset_0 =
bd + 2 * FILTER_BITS - conv_params->round_0 - conv_params->round_1;
const int offset = (1 << offset_0) + (1 << (offset_0 - 1));
const __m256i offset_const = _mm256_set1_epi16(offset);
const int rounding_shift =
2 * FILTER_BITS - conv_params->round_0 - conv_params->round_1;
const __m256i rounding_const = _mm256_set1_epi16((1 << rounding_shift) >> 1);
__m256i filt[4], s[8], coeffs_x[4], coeffs_y[4];
assert(conv_params->round_0 > 0);
filt[0] = _mm256_load_si256((__m256i const *)filt_global_avx2);
filt[1] = _mm256_load_si256((__m256i const *)(filt_global_avx2 + 32));
filt[2] = _mm256_load_si256((__m256i const *)(filt_global_avx2 + 32 * 2));
filt[3] = _mm256_load_si256((__m256i const *)(filt_global_avx2 + 32 * 3));
prepare_coeffs_lowbd(filter_params_x, subpel_x_q4, coeffs_x);
prepare_coeffs(filter_params_y, subpel_y_q4, coeffs_y);
const __m256i round_const_h = _mm256_set1_epi16(
((1 << (conv_params->round_0 - 1)) >> 1) + (1 << (bd + FILTER_BITS - 2)));
const __m128i round_shift_h = _mm_cvtsi32_si128(conv_params->round_0 - 1);
const __m256i round_const_v = _mm256_set1_epi32(
((1 << conv_params->round_1) >> 1) -
(1 << (bd + 2 * FILTER_BITS - conv_params->round_0 - 1)));
const __m128i round_shift_v = _mm_cvtsi32_si128(conv_params->round_1);
for (j = 0; j < w; j += 8) {
/* Horizontal filter */
{
const uint8_t *src_h = src_ptr + j;
for (i = 0; i < im_h; i += 2) {
__m256i data =
_mm256_castsi128_si256(_mm_loadu_si128((__m128i *)src_h));
if (i + 1 < im_h)
data = _mm256_inserti128_si256(
data, _mm_loadu_si128((__m128i *)(src_h + src_stride)), 1);
src_h += (src_stride << 1);
__m256i res = convolve_lowbd_x(data, coeffs_x, filt);
res = _mm256_sra_epi16(_mm256_add_epi16(res, round_const_h),
round_shift_h);
_mm256_store_si256((__m256i *)&im_block[i * im_stride], res);
}
}
/* Vertical filter */
{
__m256i s0 = _mm256_loadu_si256((__m256i *)(im_block + 0 * im_stride));
__m256i s1 = _mm256_loadu_si256((__m256i *)(im_block + 1 * im_stride));
__m256i s2 = _mm256_loadu_si256((__m256i *)(im_block + 2 * im_stride));
__m256i s3 = _mm256_loadu_si256((__m256i *)(im_block + 3 * im_stride));
__m256i s4 = _mm256_loadu_si256((__m256i *)(im_block + 4 * im_stride));
__m256i s5 = _mm256_loadu_si256((__m256i *)(im_block + 5 * im_stride));
s[0] = _mm256_unpacklo_epi16(s0, s1);
s[1] = _mm256_unpacklo_epi16(s2, s3);
s[2] = _mm256_unpacklo_epi16(s4, s5);
s[4] = _mm256_unpackhi_epi16(s0, s1);
s[5] = _mm256_unpackhi_epi16(s2, s3);
s[6] = _mm256_unpackhi_epi16(s4, s5);
for (i = 0; i < h; i += 2) {
const int16_t *data = &im_block[i * im_stride];
const __m256i s6 =
_mm256_loadu_si256((__m256i *)(data + 6 * im_stride));
const __m256i s7 =
_mm256_loadu_si256((__m256i *)(data + 7 * im_stride));
s[3] = _mm256_unpacklo_epi16(s6, s7);
s[7] = _mm256_unpackhi_epi16(s6, s7);
const __m256i res_a = convolve(s, coeffs_y);
const __m256i res_a_round = _mm256_sra_epi32(
_mm256_add_epi32(res_a, round_const_v), round_shift_v);
if (w - j > 4) {
const __m256i res_b = convolve(s + 4, coeffs_y);
const __m256i res_b_round = _mm256_sra_epi32(
_mm256_add_epi32(res_b, round_const_v), round_shift_v);
const __m256i res_16b = _mm256_packs_epi32(res_a_round, res_b_round);
const __m256i res_unsigned = _mm256_add_epi16(res_16b, offset_const);
if (do_average) {
const __m256i data_ref_0 =
load_line2_avx2(&dst[i * dst_stride + j],
&dst[i * dst_stride + j + dst_stride]);
const __m256i comp_avg_res =
comp_avg(&data_ref_0, &res_unsigned, &wt, use_jnt_comp_avg);
const __m256i round_result = convolve_rounding(
&comp_avg_res, &offset_const, &rounding_const, rounding_shift);
const __m256i res_8 =
_mm256_packus_epi16(round_result, round_result);
const __m128i res_0 = _mm256_castsi256_si128(res_8);
const __m128i res_1 = _mm256_extracti128_si256(res_8, 1);
_mm_storel_epi64((__m128i *)(&dst0[i * dst_stride0 + j]), res_0);
_mm_storel_epi64(
(__m128i *)((&dst0[i * dst_stride0 + j + dst_stride0])), res_1);
} else {
const __m128i res_0 = _mm256_castsi256_si128(res_unsigned);
_mm_store_si128((__m128i *)(&dst[i * dst_stride + j]), res_0);
const __m128i res_1 = _mm256_extracti128_si256(res_unsigned, 1);
_mm_store_si128((__m128i *)(&dst[i * dst_stride + j + dst_stride]),
res_1);
}
} else {
const __m256i res_16b = _mm256_packs_epi32(res_a_round, res_a_round);
const __m256i res_unsigned = _mm256_add_epi16(res_16b, offset_const);
if (do_average) {
const __m256i data_ref_0 =
load_line2_avx2(&dst[i * dst_stride + j],
&dst[i * dst_stride + j + dst_stride]);
const __m256i comp_avg_res =
comp_avg(&data_ref_0, &res_unsigned, &wt, use_jnt_comp_avg);
const __m256i round_result = convolve_rounding(
&comp_avg_res, &offset_const, &rounding_const, rounding_shift);
const __m256i res_8 =
_mm256_packus_epi16(round_result, round_result);
const __m128i res_0 = _mm256_castsi256_si128(res_8);
const __m128i res_1 = _mm256_extracti128_si256(res_8, 1);
*(uint32_t *)(&dst0[i * dst_stride0 + j]) =
_mm_cvtsi128_si32(res_0);
*(uint32_t *)(&dst0[i * dst_stride0 + j + dst_stride0]) =
_mm_cvtsi128_si32(res_1);
} else {
const __m128i res_0 = _mm256_castsi256_si128(res_unsigned);
_mm_store_si128((__m128i *)(&dst[i * dst_stride + j]), res_0);
const __m128i res_1 = _mm256_extracti128_si256(res_unsigned, 1);
_mm_store_si128((__m128i *)(&dst[i * dst_stride + j + dst_stride]),
res_1);
}
}
s[0] = s[1];
s[1] = s[2];
s[2] = s[3];
s[4] = s[5];
s[5] = s[6];
s[6] = s[7];
}
}
}
}
void av1_jnt_convolve_2d_copy_avx2(const uint8_t *src, int src_stride,
uint8_t *dst0, int dst_stride0, int w, int h,
const InterpFilterParams *filter_params_x,
const InterpFilterParams *filter_params_y,
const int subpel_x_q4, const int subpel_y_q4,
ConvolveParams *conv_params) {
const int bd = 8;
CONV_BUF_TYPE *dst = conv_params->dst;
int dst_stride = conv_params->dst_stride;
(void)filter_params_x;
(void)filter_params_y;
(void)subpel_x_q4;
(void)subpel_y_q4;
const int bits =
FILTER_BITS * 2 - conv_params->round_1 - conv_params->round_0;
const __m128i left_shift = _mm_cvtsi32_si128(bits);
const int do_average = conv_params->do_average;
const int use_jnt_comp_avg = conv_params->use_jnt_comp_avg;
const __m256i wt = unpack_weights_avx2(conv_params);
const __m256i zero = _mm256_setzero_si256();
const int offset_0 =
bd + 2 * FILTER_BITS - conv_params->round_0 - conv_params->round_1;
const int offset = (1 << offset_0) + (1 << (offset_0 - 1));
const __m256i offset_const = _mm256_set1_epi16(offset);
const int rounding_shift =
2 * FILTER_BITS - conv_params->round_0 - conv_params->round_1;
const __m256i rounding_const = _mm256_set1_epi16((1 << rounding_shift) >> 1);
int i, j;
if (!(w % 16)) {
for (i = 0; i < h; i += 1) {
for (j = 0; j < w; j += 16) {
const __m256i src_16bit = _mm256_cvtepu8_epi16(
_mm_loadu_si128((__m128i *)(&src[i * src_stride + j])));
const __m256i res = _mm256_sll_epi16(src_16bit, left_shift);
const __m256i res_unsigned = _mm256_add_epi16(res, offset_const);
if (do_average) {
const __m256i data_ref_0 =
_mm256_loadu_si256((__m256i *)(&dst[i * dst_stride + j]));
const __m256i comp_avg_res =
comp_avg(&data_ref_0, &res_unsigned, &wt, use_jnt_comp_avg);
const __m256i round_result = convolve_rounding(
&comp_avg_res, &offset_const, &rounding_const, rounding_shift);
const __m256i res_8 = _mm256_packus_epi16(round_result, round_result);
const __m256i res_0 = _mm256_permute4x64_epi64(res_8, 0xD8);
_mm_store_si128((__m128i *)(&dst0[i * dst_stride0 + j]),
_mm256_castsi256_si128(res_0));
} else {
_mm256_store_si256((__m256i *)(&dst[i * dst_stride + j]),
res_unsigned);
}
}
}
} else if (!(w % 4)) {
for (i = 0; i < h; i += 2) {
for (j = 0; j < w; j += 8) {
const __m128i src_row_0 =
_mm_loadl_epi64((__m128i *)(&src[i * src_stride + j]));
const __m128i src_row_1 =
_mm_loadl_epi64((__m128i *)(&src[i * src_stride + j + src_stride]));
// since not all compilers yet support _mm256_set_m128i()
const __m256i src_10 = _mm256_insertf128_si256(
_mm256_castsi128_si256(src_row_0), src_row_1, 1);
const __m256i src_16bit = _mm256_unpacklo_epi8(src_10, zero);
const __m256i res = _mm256_sll_epi16(src_16bit, left_shift);
const __m256i res_unsigned = _mm256_add_epi16(res, offset_const);
// Accumulate values into the destination buffer
if (do_average) {
const __m256i data_ref_0 = load_line2_avx2(
&dst[i * dst_stride + j], &dst[i * dst_stride + j + dst_stride]);
const __m256i comp_avg_res =
comp_avg(&data_ref_0, &res_unsigned, &wt, use_jnt_comp_avg);
const __m256i round_result = convolve_rounding(
&comp_avg_res, &offset_const, &rounding_const, rounding_shift);
const __m256i res_8 = _mm256_packus_epi16(round_result, round_result);
const __m128i res_0 = _mm256_castsi256_si128(res_8);
const __m128i res_1 = _mm256_extracti128_si256(res_8, 1);
if (w > 4) {
_mm_storel_epi64((__m128i *)(&dst0[i * dst_stride0 + j]), res_0);
_mm_storel_epi64(
(__m128i *)((&dst0[i * dst_stride0 + j + dst_stride0])), res_1);
} else {
*(uint32_t *)(&dst0[i * dst_stride0 + j]) =
_mm_cvtsi128_si32(res_0);
*(uint32_t *)(&dst0[i * dst_stride0 + j + dst_stride0]) =
_mm_cvtsi128_si32(res_1);
}
} else {
const __m128i res_0 = _mm256_castsi256_si128(res_unsigned);
_mm_store_si128((__m128i *)(&dst[i * dst_stride + j]), res_0);
const __m128i res_1 = _mm256_extracti128_si256(res_unsigned, 1);
_mm_store_si128((__m128i *)(&dst[i * dst_stride + j + dst_stride]),
res_1);
}
}
}
}
}