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Optimize 16x16 multiply by only slicing right mat once

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This commit is contained in:
Pauli Oikkonen 2019-06-07 11:34:20 +03:00
parent e463d27f22
commit c0cc0e8a75
1 changed files with 13 additions and 5 deletions
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18
src/strategies/avx2/dct-avx2.c
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@ -531,6 +531,17 @@ static void mul_clip_matrix_16x16_avx2(const int16_t *left, const int16_t *right
const int32_t add = 1 << (shift - 1); const int32_t add = 1 << (shift - 1);
const __m256i debias = _mm256_set1_epi32(add); const __m256i debias = _mm256_set1_epi32(add);
__m256i sliced_right[16];
for (int32_t dry = 0; dry < 16; dry += 2) {
__m256i right_up = _mm256_loadu_si256((const __m256i *)right + dry + 0);
__m256i right_dn = _mm256_loadu_si256((const __m256i *)right + dry + 1);
__m256i right_slices_lo = _mm256_unpacklo_epi16(right_up, right_dn);
__m256i right_slices_hi = _mm256_unpackhi_epi16(right_up, right_dn);
sliced_right[dry + 0] = right_slices_lo;
sliced_right[dry + 1] = right_slices_hi;
}
for (int32_t dry = 0; dry < 16; dry += 2) { for (int32_t dry = 0; dry < 16; dry += 2) {
__m256i accum1 = _mm256_setzero_si256(); __m256i accum1 = _mm256_setzero_si256();
__m256i accum2 = _mm256_setzero_si256(); __m256i accum2 = _mm256_setzero_si256();
@ -544,11 +555,8 @@ static void mul_clip_matrix_16x16_avx2(const int16_t *left, const int16_t *right
__m256i left_slice_lo = _mm256_set1_epi32(*curr_left_up); __m256i left_slice_lo = _mm256_set1_epi32(*curr_left_up);
__m256i left_slice_hi = _mm256_set1_epi32(*curr_left_dn); __m256i left_slice_hi = _mm256_set1_epi32(*curr_left_dn);
__m256i right_up = _mm256_loadu_si256((const __m256i *)right + lx + 0); __m256i right_slices_lo = sliced_right[lx + 0];
__m256i right_dn = _mm256_loadu_si256((const __m256i *)right + lx + 1); __m256i right_slices_hi = sliced_right[lx + 1];
__m256i right_slices_lo = _mm256_unpacklo_epi16(right_up, right_dn);
__m256i right_slices_hi = _mm256_unpackhi_epi16(right_up, right_dn);
__m256i prod1 = _mm256_madd_epi16(left_slice_lo, right_slices_lo); __m256i prod1 = _mm256_madd_epi16(left_slice_lo, right_slices_lo);
__m256i prod2 = _mm256_madd_epi16(left_slice_hi, right_slices_lo); __m256i prod2 = _mm256_madd_epi16(left_slice_hi, right_slices_lo);