| /* |
| * 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 <tmmintrin.h> |
| |
| #include "config/aom_config.h" |
| #include "config/aom_dsp_rtcd.h" |
| |
| #include "aom_dsp/x86/synonyms.h" |
| |
| void aom_var_filter_block2d_bil_first_pass_ssse3( |
| const uint8_t *a, uint16_t *b, unsigned int src_pixels_per_line, |
| unsigned int pixel_step, unsigned int output_height, |
| unsigned int output_width, const uint8_t *filter) { |
| // Note: filter[0], filter[1] could be {128, 0}, where 128 will overflow |
| // in computation using _mm_maddubs_epi16. |
| // Change {128, 0} to {64, 0} and reduce FILTER_BITS by 1 to avoid overflow. |
| const int16_t round = (1 << (FILTER_BITS - 1)) >> 1; |
| const __m128i r = _mm_set1_epi16(round); |
| const uint8_t f0 = filter[0] >> 1; |
| const uint8_t f1 = filter[1] >> 1; |
| const __m128i filters = _mm_setr_epi8(f0, f1, f0, f1, f0, f1, f0, f1, f0, f1, |
| f0, f1, f0, f1, f0, f1); |
| unsigned int i, j; |
| (void)pixel_step; |
| |
| if (output_width >= 8) { |
| for (i = 0; i < output_height; ++i) { |
| for (j = 0; j < output_width; j += 8) { |
| // load source |
| __m128i source_low = xx_loadl_64(a); |
| __m128i source_hi = xx_loadl_64(a + 1); |
| |
| // unpack to: |
| // { a[0], a[1], a[1], a[2], a[2], a[3], a[3], a[4], |
| // a[4], a[5], a[5], a[6], a[6], a[7], a[7], a[8] } |
| __m128i source = _mm_unpacklo_epi8(source_low, source_hi); |
| |
| // b[i] = a[i] * filter[0] + a[i + 1] * filter[1] |
| __m128i res = _mm_maddubs_epi16(source, filters); |
| |
| // round |
| res = _mm_srai_epi16(_mm_add_epi16(res, r), FILTER_BITS - 1); |
| |
| xx_storeu_128(b, res); |
| |
| a += 8; |
| b += 8; |
| } |
| |
| a += src_pixels_per_line - output_width; |
| } |
| } else { |
| const __m128i shuffle_mask = |
| _mm_setr_epi8(0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8); |
| for (i = 0; i < output_height; ++i) { |
| // load source, only first 5 values are meaningful: |
| // { a[0], a[1], a[2], a[3], a[4], xxxx } |
| __m128i source = xx_loadl_64(a); |
| |
| // shuffle, up to the first 8 are useful |
| // { a[0], a[1], a[1], a[2], a[2], a[3], a[3], a[4], |
| // a[4], a[5], a[5], a[6], a[6], a[7], a[7], a[8] } |
| __m128i source_shuffle = _mm_shuffle_epi8(source, shuffle_mask); |
| |
| __m128i res = _mm_maddubs_epi16(source_shuffle, filters); |
| res = _mm_srai_epi16(_mm_add_epi16(res, r), FILTER_BITS - 1); |
| |
| xx_storel_64(b, res); |
| |
| a += src_pixels_per_line; |
| b += output_width; |
| } |
| } |
| } |
| |
| void aom_var_filter_block2d_bil_second_pass_ssse3( |
| const uint16_t *a, uint8_t *b, unsigned int src_pixels_per_line, |
| unsigned int pixel_step, unsigned int output_height, |
| unsigned int output_width, const uint8_t *filter) { |
| const int16_t round = (1 << FILTER_BITS) >> 1; |
| const __m128i r = _mm_set1_epi32(round); |
| const __m128i filters = |
| _mm_setr_epi16(filter[0], filter[1], filter[0], filter[1], filter[0], |
| filter[1], filter[0], filter[1]); |
| const __m128i shuffle_mask = |
| _mm_setr_epi8(0, 1, 8, 9, 2, 3, 10, 11, 4, 5, 12, 13, 6, 7, 14, 15); |
| const __m128i mask = |
| _mm_setr_epi8(0, 4, 8, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1); |
| unsigned int i, j; |
| |
| for (i = 0; i < output_height; ++i) { |
| for (j = 0; j < output_width; j += 4) { |
| // load source as: |
| // { a[0], a[1], a[2], a[3], a[w], a[w+1], a[w+2], a[w+3] } |
| __m128i source1 = xx_loadl_64(a); |
| __m128i source2 = xx_loadl_64(a + pixel_step); |
| __m128i source = _mm_unpacklo_epi64(source1, source2); |
| |
| // shuffle source to: |
| // { a[0], a[w], a[1], a[w+1], a[2], a[w+2], a[3], a[w+3] } |
| __m128i source_shuffle = _mm_shuffle_epi8(source, shuffle_mask); |
| |
| // b[i] = a[i] * filter[0] + a[w + i] * filter[1] |
| __m128i res = _mm_madd_epi16(source_shuffle, filters); |
| |
| // round |
| res = _mm_srai_epi32(_mm_add_epi32(res, r), FILTER_BITS); |
| |
| // shuffle to get each lower 8 bit of every 32 bit |
| res = _mm_shuffle_epi8(res, mask); |
| |
| xx_storel_32(b, res); |
| |
| a += 4; |
| b += 4; |
| } |
| |
| a += src_pixels_per_line - output_width; |
| } |
| } |