| /* | |
| * 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)); | |
| 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 = 8 | |
| } 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) | |
| // 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 = 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) | |
| // 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++) { | |
| 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 = 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) | |
| 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 = 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); | |
| 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_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; | |
| } |