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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 <assert.h>
#include <immintrin.h>
#include "config/aom_config.h"
#include "config/aom_dsp_rtcd.h"
#include "aom_ports/mem.h"
#include "aom/aom_integer.h"
#include "aom_dsp/aom_dsp_common.h"
#include "aom_dsp/aom_filter.h"
#include "aom_dsp/x86/obmc_intrinsic_sse4.h"
////////////////////////////////////////////////////////////////////////////////
// 8 bit
////////////////////////////////////////////////////////////////////////////////
static INLINE void obmc_variance_w8n(const uint8_t *pre, const int pre_stride,
const int32_t *wsrc, const int32_t *mask,
unsigned int *const sse, int *const sum,
const int w, const int h) {
int n = 0, width, height = h;
__m128i v_sum_d = _mm_setzero_si128();
__m128i v_sse_d = _mm_setzero_si128();
const __m256i v_bias_d = _mm256_set1_epi32((1 << 12) >> 1);
__m128i v_d;
const uint8_t *pre_temp;
assert(w >= 8);
assert(IS_POWER_OF_TWO(w));
assert(IS_POWER_OF_TWO(h));
do {
width = w;
pre_temp = pre;
do {
const __m128i v_p_b = _mm_loadl_epi64((const __m128i *)pre_temp);
const __m256i v_m_d = _mm256_loadu_si256((__m256i const *)(mask + n));
const __m256i v_w_d = _mm256_loadu_si256((__m256i const *)(wsrc + n));
const __m256i v_p0_d = _mm256_cvtepu8_epi32(v_p_b);
// Values in both pre and mask fit in 15 bits, and are packed at 32 bit
// boundaries. We use pmaddwd, as it has lower latency on Haswell
// than pmulld but produces the same result with these inputs.
const __m256i v_pm_d = _mm256_madd_epi16(v_p0_d, v_m_d);
const __m256i v_diff0_d = _mm256_sub_epi32(v_w_d, v_pm_d);
const __m256i v_sign_d = _mm256_srai_epi32(v_diff0_d, 31);
const __m256i v_tmp_d =
_mm256_add_epi32(_mm256_add_epi32(v_diff0_d, v_bias_d), v_sign_d);
const __m256i v_rdiff0_d = _mm256_srai_epi32(v_tmp_d, 12);
const __m128i v_rdiff_d = _mm256_castsi256_si128(v_rdiff0_d);
const __m128i v_rdiff1_d = _mm256_extracti128_si256(v_rdiff0_d, 1);
const __m128i v_rdiff01_w = _mm_packs_epi32(v_rdiff_d, v_rdiff1_d);
const __m128i v_sqrdiff_d = _mm_madd_epi16(v_rdiff01_w, v_rdiff01_w);
v_sum_d = _mm_add_epi32(v_sum_d, v_rdiff_d);
v_sum_d = _mm_add_epi32(v_sum_d, v_rdiff1_d);
v_sse_d = _mm_add_epi32(v_sse_d, v_sqrdiff_d);
pre_temp += 8;
n += 8;
width -= 8;
} while (width > 0);
pre += pre_stride;
height -= 1;
} while (height > 0);
v_d = _mm_hadd_epi32(v_sum_d, v_sse_d);
v_d = _mm_hadd_epi32(v_d, v_d);
*sum = _mm_cvtsi128_si32(v_d);
*sse = (unsigned int)_mm_cvtsi128_si32(_mm_srli_si128(v_d, 4));
}
static INLINE void obmc_variance_w16n(const uint8_t *pre, const int pre_stride,
const int32_t *wsrc, const int32_t *mask,
unsigned int *const sse, int *const sum,
const int w, const int h) {
int n = 0, width, height = h;
__m256i v_d;
__m128i res0;
const uint8_t *pre_temp;
const __m256i v_bias_d = _mm256_set1_epi32((1 << 12) >> 1);
__m256i v_sum_d = _mm256_setzero_si256();
__m256i v_sse_d = _mm256_setzero_si256();
assert(w >= 16);
assert(IS_POWER_OF_TWO(w));
assert(IS_POWER_OF_TWO(h));
do {
width = w;
pre_temp = pre;
do {
const __m128i v_p_b = _mm_loadu_si128((__m128i *)pre_temp);
const __m256i v_m0_d = _mm256_loadu_si256((__m256i const *)(mask + n));
const __m256i v_w0_d = _mm256_loadu_si256((__m256i const *)(wsrc + n));
const __m256i v_m1_d =
_mm256_loadu_si256((__m256i const *)(mask + n + 8));
const __m256i v_w1_d =
_mm256_loadu_si256((__m256i const *)(wsrc + n + 8));
const __m256i v_p0_d = _mm256_cvtepu8_epi32(v_p_b);
const __m256i v_p1_d = _mm256_cvtepu8_epi32(_mm_srli_si128(v_p_b, 8));
const __m256i v_pm0_d = _mm256_madd_epi16(v_p0_d, v_m0_d);
const __m256i v_pm1_d = _mm256_madd_epi16(v_p1_d, v_m1_d);
const __m256i v_diff0_d = _mm256_sub_epi32(v_w0_d, v_pm0_d);
const __m256i v_diff1_d = _mm256_sub_epi32(v_w1_d, v_pm1_d);
const __m256i v_sign0_d = _mm256_srai_epi32(v_diff0_d, 31);
const __m256i v_sign1_d = _mm256_srai_epi32(v_diff1_d, 31);
const __m256i v_tmp0_d =
_mm256_add_epi32(_mm256_add_epi32(v_diff0_d, v_bias_d), v_sign0_d);
const __m256i v_tmp1_d =
_mm256_add_epi32(_mm256_add_epi32(v_diff1_d, v_bias_d), v_sign1_d);
const __m256i v_rdiff0_d = _mm256_srai_epi32(v_tmp0_d, 12);
const __m256i v_rdiff2_d = _mm256_srai_epi32(v_tmp1_d, 12);
const __m256i v_rdiff1_d = _mm256_add_epi32(v_rdiff0_d, v_rdiff2_d);
const __m256i v_rdiff01_w = _mm256_packs_epi32(v_rdiff0_d, v_rdiff2_d);
const __m256i v_sqrdiff_d = _mm256_madd_epi16(v_rdiff01_w, v_rdiff01_w);
v_sum_d = _mm256_add_epi32(v_sum_d, v_rdiff1_d);
v_sse_d = _mm256_add_epi32(v_sse_d, v_sqrdiff_d);
pre_temp += 16;
n += 16;
width -= 16;
} while (width > 0);
pre += pre_stride;
height -= 1;
} while (height > 0);
v_d = _mm256_hadd_epi32(v_sum_d, v_sse_d);
v_d = _mm256_hadd_epi32(v_d, v_d);
res0 = _mm256_castsi256_si128(v_d);
res0 = _mm_add_epi32(res0, _mm256_extractf128_si256(v_d, 1));
*sum = _mm_cvtsi128_si32(res0);
*sse = (unsigned int)_mm_cvtsi128_si32(_mm_srli_si128(res0, 4));
}
#define OBMCVARWXH(W, H) \
unsigned int aom_obmc_variance##W##x##H##_avx2( \
const uint8_t *pre, int pre_stride, const int32_t *wsrc, \
const int32_t *mask, unsigned int *sse) { \
int sum; \
if (W == 4) { \
obmc_variance_w4(pre, pre_stride, wsrc, mask, sse, &sum, H); \
} else if (W == 8) { \
obmc_variance_w8n(pre, pre_stride, wsrc, mask, sse, &sum, W, H); \
} else { \
obmc_variance_w16n(pre, pre_stride, wsrc, mask, sse, &sum, W, H); \
} \
\
return *sse - (unsigned int)(((int64_t)sum * sum) / (W * H)); \
}
OBMCVARWXH(128, 128)
OBMCVARWXH(128, 64)
OBMCVARWXH(64, 128)
OBMCVARWXH(64, 64)
OBMCVARWXH(64, 32)
OBMCVARWXH(32, 64)
OBMCVARWXH(32, 32)
OBMCVARWXH(32, 16)
OBMCVARWXH(16, 32)
OBMCVARWXH(16, 16)
OBMCVARWXH(16, 8)
OBMCVARWXH(8, 16)
OBMCVARWXH(8, 8)
OBMCVARWXH(8, 4)
OBMCVARWXH(4, 8)
OBMCVARWXH(4, 4)
OBMCVARWXH(4, 16)
OBMCVARWXH(16, 4)
OBMCVARWXH(8, 32)
OBMCVARWXH(32, 8)
OBMCVARWXH(16, 64)
OBMCVARWXH(64, 16)
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