ref: 4029b8cd40e2ab02b6936d617fbc93a53327d620
dir: /vpx_dsp/x86/vpx_subpixel_8t_intrin_avx2.c/
/* * Copyright (c) 2010 The WebM project authors. All Rights Reserved. * * Use of this source code is governed by a BSD-style license * that can be found in the LICENSE file in the root of the source * tree. An additional intellectual property rights grant can be found * in the file PATENTS. All contributing project authors may * be found in the AUTHORS file in the root of the source tree. */ #include <immintrin.h> #include <stdio.h> #include "./vpx_dsp_rtcd.h" #include "vpx_dsp/x86/convolve.h" #include "vpx_dsp/x86/convolve_avx2.h" #include "vpx_dsp/x86/convolve_sse2.h" #include "vpx_ports/mem.h" // filters for 16_h8 DECLARE_ALIGNED(32, static const uint8_t, filt1_global_avx2[32]) = { 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8 }; DECLARE_ALIGNED(32, static const uint8_t, filt2_global_avx2[32]) = { 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10 }; DECLARE_ALIGNED(32, static const uint8_t, filt3_global_avx2[32]) = { 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12 }; DECLARE_ALIGNED(32, static const uint8_t, filt4_global_avx2[32]) = { 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13, 14, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13, 14 }; static INLINE void vpx_filter_block1d16_h8_x_avx2( const uint8_t *src_ptr, ptrdiff_t src_pixels_per_line, uint8_t *output_ptr, ptrdiff_t output_pitch, uint32_t output_height, const int16_t *filter, const int avg) { __m128i outReg1, outReg2; __m256i outReg32b1, outReg32b2; unsigned int i; ptrdiff_t src_stride, dst_stride; __m256i f[4], filt[4], s[4]; shuffle_filter_avx2(filter, f); filt[0] = _mm256_load_si256((__m256i const *)filt1_global_avx2); filt[1] = _mm256_load_si256((__m256i const *)filt2_global_avx2); filt[2] = _mm256_load_si256((__m256i const *)filt3_global_avx2); filt[3] = _mm256_load_si256((__m256i const *)filt4_global_avx2); // multiple the size of the source and destination stride by two src_stride = src_pixels_per_line << 1; dst_stride = output_pitch << 1; for (i = output_height; i > 1; i -= 2) { __m256i srcReg; // load the 2 strides of source srcReg = _mm256_castsi128_si256(_mm_loadu_si128((const __m128i *)(src_ptr - 3))); srcReg = _mm256_inserti128_si256( srcReg, _mm_loadu_si128((const __m128i *)(src_ptr + src_pixels_per_line - 3)), 1); // filter the source buffer s[0] = _mm256_shuffle_epi8(srcReg, filt[0]); s[1] = _mm256_shuffle_epi8(srcReg, filt[1]); s[2] = _mm256_shuffle_epi8(srcReg, filt[2]); s[3] = _mm256_shuffle_epi8(srcReg, filt[3]); outReg32b1 = convolve8_16_avx2(s, f); // reading 2 strides of the next 16 bytes // (part of it was being read by earlier read) srcReg = _mm256_castsi128_si256(_mm_loadu_si128((const __m128i *)(src_ptr + 5))); srcReg = _mm256_inserti128_si256( srcReg, _mm_loadu_si128((const __m128i *)(src_ptr + src_pixels_per_line + 5)), 1); // filter the source buffer s[0] = _mm256_shuffle_epi8(srcReg, filt[0]); s[1] = _mm256_shuffle_epi8(srcReg, filt[1]); s[2] = _mm256_shuffle_epi8(srcReg, filt[2]); s[3] = _mm256_shuffle_epi8(srcReg, filt[3]); outReg32b2 = convolve8_16_avx2(s, f); // shrink to 8 bit each 16 bits, the low and high 64-bits of each lane // contain the first and second convolve result respectively outReg32b1 = _mm256_packus_epi16(outReg32b1, outReg32b2); src_ptr += src_stride; // average if necessary outReg1 = _mm256_castsi256_si128(outReg32b1); outReg2 = _mm256_extractf128_si256(outReg32b1, 1); if (avg) { outReg1 = _mm_avg_epu8(outReg1, _mm_load_si128((__m128i *)output_ptr)); outReg2 = _mm_avg_epu8( outReg2, _mm_load_si128((__m128i *)(output_ptr + output_pitch))); } // save 16 bytes _mm_store_si128((__m128i *)output_ptr, outReg1); // save the next 16 bits _mm_store_si128((__m128i *)(output_ptr + output_pitch), outReg2); output_ptr += dst_stride; } // if the number of strides is odd. // process only 16 bytes if (i > 0) { __m128i srcReg; // load the first 16 bytes of the last row srcReg = _mm_loadu_si128((const __m128i *)(src_ptr - 3)); // filter the source buffer s[0] = _mm256_castsi128_si256( _mm_shuffle_epi8(srcReg, _mm256_castsi256_si128(filt[0]))); s[1] = _mm256_castsi128_si256( _mm_shuffle_epi8(srcReg, _mm256_castsi256_si128(filt[1]))); s[2] = _mm256_castsi128_si256( _mm_shuffle_epi8(srcReg, _mm256_castsi256_si128(filt[2]))); s[3] = _mm256_castsi128_si256( _mm_shuffle_epi8(srcReg, _mm256_castsi256_si128(filt[3]))); outReg1 = convolve8_8_avx2(s, f); // reading the next 16 bytes // (part of it was being read by earlier read) srcReg = _mm_loadu_si128((const __m128i *)(src_ptr + 5)); // filter the source buffer s[0] = _mm256_castsi128_si256( _mm_shuffle_epi8(srcReg, _mm256_castsi256_si128(filt[0]))); s[1] = _mm256_castsi128_si256( _mm_shuffle_epi8(srcReg, _mm256_castsi256_si128(filt[1]))); s[2] = _mm256_castsi128_si256( _mm_shuffle_epi8(srcReg, _mm256_castsi256_si128(filt[2]))); s[3] = _mm256_castsi128_si256( _mm_shuffle_epi8(srcReg, _mm256_castsi256_si128(filt[3]))); outReg2 = convolve8_8_avx2(s, f); // shrink to 8 bit each 16 bits, the low and high 64-bits of each lane // contain the first and second convolve result respectively outReg1 = _mm_packus_epi16(outReg1, outReg2); // average if necessary if (avg) { outReg1 = _mm_avg_epu8(outReg1, _mm_load_si128((__m128i *)output_ptr)); } // save 16 bytes _mm_store_si128((__m128i *)output_ptr, outReg1); } } static void vpx_filter_block1d16_h8_avx2( const uint8_t *src_ptr, ptrdiff_t src_stride, uint8_t *output_ptr, ptrdiff_t dst_stride, uint32_t output_height, const int16_t *filter) { vpx_filter_block1d16_h8_x_avx2(src_ptr, src_stride, output_ptr, dst_stride, output_height, filter, 0); } static void vpx_filter_block1d16_h8_avg_avx2( const uint8_t *src_ptr, ptrdiff_t src_stride, uint8_t *output_ptr, ptrdiff_t dst_stride, uint32_t output_height, const int16_t *filter) { vpx_filter_block1d16_h8_x_avx2(src_ptr, src_stride, output_ptr, dst_stride, output_height, filter, 1); } static INLINE void vpx_filter_block1d16_v8_x_avx2( const uint8_t *src_ptr, ptrdiff_t src_pitch, uint8_t *output_ptr, ptrdiff_t out_pitch, uint32_t output_height, const int16_t *filter, const int avg) { __m128i outReg1, outReg2; __m256i srcRegHead1; unsigned int i; ptrdiff_t src_stride, dst_stride; __m256i f[4], s1[4], s2[4]; shuffle_filter_avx2(filter, f); // multiple the size of the source and destination stride by two src_stride = src_pitch << 1; dst_stride = out_pitch << 1; { __m128i s[6]; __m256i s32b[6]; // load 16 bytes 7 times in stride of src_pitch s[0] = _mm_loadu_si128((const __m128i *)(src_ptr + 0 * src_pitch)); s[1] = _mm_loadu_si128((const __m128i *)(src_ptr + 1 * src_pitch)); s[2] = _mm_loadu_si128((const __m128i *)(src_ptr + 2 * src_pitch)); s[3] = _mm_loadu_si128((const __m128i *)(src_ptr + 3 * src_pitch)); s[4] = _mm_loadu_si128((const __m128i *)(src_ptr + 4 * src_pitch)); s[5] = _mm_loadu_si128((const __m128i *)(src_ptr + 5 * src_pitch)); srcRegHead1 = _mm256_castsi128_si256( _mm_loadu_si128((const __m128i *)(src_ptr + 6 * src_pitch))); // have each consecutive loads on the same 256 register s32b[0] = _mm256_inserti128_si256(_mm256_castsi128_si256(s[0]), s[1], 1); s32b[1] = _mm256_inserti128_si256(_mm256_castsi128_si256(s[1]), s[2], 1); s32b[2] = _mm256_inserti128_si256(_mm256_castsi128_si256(s[2]), s[3], 1); s32b[3] = _mm256_inserti128_si256(_mm256_castsi128_si256(s[3]), s[4], 1); s32b[4] = _mm256_inserti128_si256(_mm256_castsi128_si256(s[4]), s[5], 1); s32b[5] = _mm256_inserti128_si256(_mm256_castsi128_si256(s[5]), _mm256_castsi256_si128(srcRegHead1), 1); // merge every two consecutive registers except the last one // the first lanes contain values for filtering odd rows (1,3,5...) and // the second lanes contain values for filtering even rows (2,4,6...) s1[0] = _mm256_unpacklo_epi8(s32b[0], s32b[1]); s2[0] = _mm256_unpackhi_epi8(s32b[0], s32b[1]); s1[1] = _mm256_unpacklo_epi8(s32b[2], s32b[3]); s2[1] = _mm256_unpackhi_epi8(s32b[2], s32b[3]); s1[2] = _mm256_unpacklo_epi8(s32b[4], s32b[5]); s2[2] = _mm256_unpackhi_epi8(s32b[4], s32b[5]); } for (i = output_height; i > 1; i -= 2) { __m256i srcRegHead2, srcRegHead3; // load the next 2 loads of 16 bytes and have every two // consecutive loads in the same 256 bit register srcRegHead2 = _mm256_castsi128_si256( _mm_loadu_si128((const __m128i *)(src_ptr + 7 * src_pitch))); srcRegHead1 = _mm256_inserti128_si256( srcRegHead1, _mm256_castsi256_si128(srcRegHead2), 1); srcRegHead3 = _mm256_castsi128_si256( _mm_loadu_si128((const __m128i *)(src_ptr + 8 * src_pitch))); srcRegHead2 = _mm256_inserti128_si256( srcRegHead2, _mm256_castsi256_si128(srcRegHead3), 1); // merge the two new consecutive registers // the first lane contain values for filtering odd rows (1,3,5...) and // the second lane contain values for filtering even rows (2,4,6...) s1[3] = _mm256_unpacklo_epi8(srcRegHead1, srcRegHead2); s2[3] = _mm256_unpackhi_epi8(srcRegHead1, srcRegHead2); s1[0] = convolve8_16_avx2(s1, f); s2[0] = convolve8_16_avx2(s2, f); // shrink to 8 bit each 16 bits, the low and high 64-bits of each lane // contain the first and second convolve result respectively s1[0] = _mm256_packus_epi16(s1[0], s2[0]); src_ptr += src_stride; // average if necessary outReg1 = _mm256_castsi256_si128(s1[0]); outReg2 = _mm256_extractf128_si256(s1[0], 1); if (avg) { outReg1 = _mm_avg_epu8(outReg1, _mm_load_si128((__m128i *)output_ptr)); outReg2 = _mm_avg_epu8( outReg2, _mm_load_si128((__m128i *)(output_ptr + out_pitch))); } // save 16 bytes _mm_store_si128((__m128i *)output_ptr, outReg1); // save the next 16 bits _mm_store_si128((__m128i *)(output_ptr + out_pitch), outReg2); output_ptr += dst_stride; // shift down by two rows s1[0] = s1[1]; s2[0] = s2[1]; s1[1] = s1[2]; s2[1] = s2[2]; s1[2] = s1[3]; s2[2] = s2[3]; srcRegHead1 = srcRegHead3; } // if the number of strides is odd. // process only 16 bytes if (i > 0) { // load the last 16 bytes const __m128i srcRegHead2 = _mm_loadu_si128((const __m128i *)(src_ptr + src_pitch * 7)); // merge the last 2 results together s1[0] = _mm256_castsi128_si256( _mm_unpacklo_epi8(_mm256_castsi256_si128(srcRegHead1), srcRegHead2)); s2[0] = _mm256_castsi128_si256( _mm_unpackhi_epi8(_mm256_castsi256_si128(srcRegHead1), srcRegHead2)); outReg1 = convolve8_8_avx2(s1, f); outReg2 = convolve8_8_avx2(s2, f); // shrink to 8 bit each 16 bits, the low and high 64-bits of each lane // contain the first and second convolve result respectively outReg1 = _mm_packus_epi16(outReg1, outReg2); // average if necessary if (avg) { outReg1 = _mm_avg_epu8(outReg1, _mm_load_si128((__m128i *)output_ptr)); } // save 16 bytes _mm_store_si128((__m128i *)output_ptr, outReg1); } } static void vpx_filter_block1d16_v8_avx2(const uint8_t *src_ptr, ptrdiff_t src_stride, uint8_t *dst_ptr, ptrdiff_t dst_stride, uint32_t height, const int16_t *filter) { vpx_filter_block1d16_v8_x_avx2(src_ptr, src_stride, dst_ptr, dst_stride, height, filter, 0); } static void vpx_filter_block1d16_v8_avg_avx2( const uint8_t *src_ptr, ptrdiff_t src_stride, uint8_t *dst_ptr, ptrdiff_t dst_stride, uint32_t height, const int16_t *filter) { vpx_filter_block1d16_v8_x_avx2(src_ptr, src_stride, dst_ptr, dst_stride, height, filter, 1); } static void vpx_filter_block1d16_h4_avx2(const uint8_t *src_ptr, ptrdiff_t src_stride, uint8_t *dst_ptr, ptrdiff_t dst_stride, uint32_t height, const int16_t *kernel) { // We will cast the kernel from 16-bit words to 8-bit words, and then extract // the middle four elements of the kernel into two registers in the form // ... k[3] k[2] k[3] k[2] // ... k[5] k[4] k[5] k[4] // Then we shuffle the source into // ... s[1] s[0] s[0] s[-1] // ... s[3] s[2] s[2] s[1] // Calling multiply and add gives us half of the sum. Calling add gives us // first half of the output. Repeat again to get the second half of the // output. Finally we shuffle again to combine the two outputs. // Since avx2 allows us to use 256-bit buffer, we can do this two rows at a // time. __m128i kernel_reg; // Kernel __m256i kernel_reg_256, kernel_reg_23, kernel_reg_45; // Segments of the kernel used const __m256i reg_32 = _mm256_set1_epi16(32); // Used for rounding const ptrdiff_t unrolled_src_stride = src_stride << 1; const ptrdiff_t unrolled_dst_stride = dst_stride << 1; int h; __m256i src_reg, src_reg_shift_0, src_reg_shift_2; __m256i dst_first, dst_second; __m256i tmp_0, tmp_1; __m256i idx_shift_0 = _mm256_setr_epi8(0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8); __m256i idx_shift_2 = _mm256_setr_epi8(2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10); // Start one pixel before as we need tap/2 - 1 = 1 sample from the past src_ptr -= 1; // Load Kernel kernel_reg = _mm_loadu_si128((const __m128i *)kernel); kernel_reg = _mm_srai_epi16(kernel_reg, 1); kernel_reg = _mm_packs_epi16(kernel_reg, kernel_reg); kernel_reg_256 = _mm256_broadcastsi128_si256(kernel_reg); kernel_reg_23 = _mm256_shuffle_epi8(kernel_reg_256, _mm256_set1_epi16(0x0302u)); kernel_reg_45 = _mm256_shuffle_epi8(kernel_reg_256, _mm256_set1_epi16(0x0504u)); for (h = height; h >= 2; h -= 2) { // Load the source src_reg = mm256_loadu2_si128(src_ptr, src_ptr + src_stride); src_reg_shift_0 = _mm256_shuffle_epi8(src_reg, idx_shift_0); src_reg_shift_2 = _mm256_shuffle_epi8(src_reg, idx_shift_2); // Partial result for first half tmp_0 = _mm256_maddubs_epi16(src_reg_shift_0, kernel_reg_23); tmp_1 = _mm256_maddubs_epi16(src_reg_shift_2, kernel_reg_45); dst_first = _mm256_adds_epi16(tmp_0, tmp_1); // Do again to get the second half of dst // Load the source src_reg = mm256_loadu2_si128(src_ptr + 8, src_ptr + src_stride + 8); src_reg_shift_0 = _mm256_shuffle_epi8(src_reg, idx_shift_0); src_reg_shift_2 = _mm256_shuffle_epi8(src_reg, idx_shift_2); // Partial result for second half tmp_0 = _mm256_maddubs_epi16(src_reg_shift_0, kernel_reg_23); tmp_1 = _mm256_maddubs_epi16(src_reg_shift_2, kernel_reg_45); dst_second = _mm256_adds_epi16(tmp_0, tmp_1); // Round each result dst_first = mm256_round_epi16(&dst_first, ®_32, 6); dst_second = mm256_round_epi16(&dst_second, ®_32, 6); // Finally combine to get the final dst dst_first = _mm256_packus_epi16(dst_first, dst_second); mm256_store2_si128((__m128i *)dst_ptr, (__m128i *)(dst_ptr + dst_stride), &dst_first); src_ptr += unrolled_src_stride; dst_ptr += unrolled_dst_stride; } // Repeat for the last row if needed if (h > 0) { src_reg = _mm256_loadu_si256((const __m256i *)src_ptr); // Reorder into 2 1 1 2 src_reg = _mm256_permute4x64_epi64(src_reg, 0x94); src_reg_shift_0 = _mm256_shuffle_epi8(src_reg, idx_shift_0); src_reg_shift_2 = _mm256_shuffle_epi8(src_reg, idx_shift_2); tmp_0 = _mm256_maddubs_epi16(src_reg_shift_0, kernel_reg_23); tmp_1 = _mm256_maddubs_epi16(src_reg_shift_2, kernel_reg_45); dst_first = _mm256_adds_epi16(tmp_0, tmp_1); dst_first = mm256_round_epi16(&dst_first, ®_32, 6); dst_first = _mm256_packus_epi16(dst_first, dst_first); dst_first = _mm256_permute4x64_epi64(dst_first, 0x8); _mm_store_si128((__m128i *)dst_ptr, _mm256_castsi256_si128(dst_first)); } } static void vpx_filter_block1d16_v4_avx2(const uint8_t *src_ptr, ptrdiff_t src_stride, uint8_t *dst_ptr, ptrdiff_t dst_stride, uint32_t height, const int16_t *kernel) { // We will load two rows of pixels as 8-bit words, rearrange them into the // form // ... s[1,0] s[0,0] s[0,0] s[-1,0] // so that we can call multiply and add with the kernel partial output. Then // we can call add with another row to get the output. // Register for source s[-1:3, :] __m256i src_reg_1, src_reg_2, src_reg_3; // Interleaved rows of the source. lo is first half, hi second __m256i src_reg_m10, src_reg_01, src_reg_12, src_reg_23; __m256i src_reg_m1001_lo, src_reg_m1001_hi, src_reg_1223_lo, src_reg_1223_hi; __m128i kernel_reg; // Kernel __m256i kernel_reg_256, kernel_reg_23, kernel_reg_45; // Segments of the kernel used // Result after multiply and add __m256i res_reg_m1001_lo, res_reg_1223_lo, res_reg_m1001_hi, res_reg_1223_hi; __m256i res_reg, res_reg_lo, res_reg_hi; const __m256i reg_32 = _mm256_set1_epi16(32); // Used for rounding // We will compute the result two rows at a time const ptrdiff_t src_stride_unrolled = src_stride << 1; const ptrdiff_t dst_stride_unrolled = dst_stride << 1; int h; // Load Kernel kernel_reg = _mm_loadu_si128((const __m128i *)kernel); kernel_reg = _mm_srai_epi16(kernel_reg, 1); kernel_reg = _mm_packs_epi16(kernel_reg, kernel_reg); kernel_reg_256 = _mm256_broadcastsi128_si256(kernel_reg); kernel_reg_23 = _mm256_shuffle_epi8(kernel_reg_256, _mm256_set1_epi16(0x0302u)); kernel_reg_45 = _mm256_shuffle_epi8(kernel_reg_256, _mm256_set1_epi16(0x0504u)); // Row -1 to row 0 src_reg_m10 = mm256_loadu2_si128((const __m128i *)src_ptr, (const __m128i *)(src_ptr + src_stride)); // Row 0 to row 1 src_reg_1 = _mm256_castsi128_si256( _mm_loadu_si128((const __m128i *)(src_ptr + src_stride * 2))); src_reg_01 = _mm256_permute2x128_si256(src_reg_m10, src_reg_1, 0x21); // First three rows src_reg_m1001_lo = _mm256_unpacklo_epi8(src_reg_m10, src_reg_01); src_reg_m1001_hi = _mm256_unpackhi_epi8(src_reg_m10, src_reg_01); for (h = height; h > 1; h -= 2) { src_reg_2 = _mm256_castsi128_si256( _mm_loadu_si128((const __m128i *)(src_ptr + src_stride * 3))); src_reg_12 = _mm256_inserti128_si256(src_reg_1, _mm256_castsi256_si128(src_reg_2), 1); src_reg_3 = _mm256_castsi128_si256( _mm_loadu_si128((const __m128i *)(src_ptr + src_stride * 4))); src_reg_23 = _mm256_inserti128_si256(src_reg_2, _mm256_castsi256_si128(src_reg_3), 1); // Last three rows src_reg_1223_lo = _mm256_unpacklo_epi8(src_reg_12, src_reg_23); src_reg_1223_hi = _mm256_unpackhi_epi8(src_reg_12, src_reg_23); // Output from first half res_reg_m1001_lo = _mm256_maddubs_epi16(src_reg_m1001_lo, kernel_reg_23); res_reg_1223_lo = _mm256_maddubs_epi16(src_reg_1223_lo, kernel_reg_45); res_reg_lo = _mm256_adds_epi16(res_reg_m1001_lo, res_reg_1223_lo); // Output from second half res_reg_m1001_hi = _mm256_maddubs_epi16(src_reg_m1001_hi, kernel_reg_23); res_reg_1223_hi = _mm256_maddubs_epi16(src_reg_1223_hi, kernel_reg_45); res_reg_hi = _mm256_adds_epi16(res_reg_m1001_hi, res_reg_1223_hi); // Round the words res_reg_lo = mm256_round_epi16(&res_reg_lo, ®_32, 6); res_reg_hi = mm256_round_epi16(&res_reg_hi, ®_32, 6); // Combine to get the result res_reg = _mm256_packus_epi16(res_reg_lo, res_reg_hi); // Save the result mm256_store2_si128((__m128i *)dst_ptr, (__m128i *)(dst_ptr + dst_stride), &res_reg); // Update the source by two rows src_ptr += src_stride_unrolled; dst_ptr += dst_stride_unrolled; src_reg_m1001_lo = src_reg_1223_lo; src_reg_m1001_hi = src_reg_1223_hi; src_reg_1 = src_reg_3; } } static void vpx_filter_block1d8_h4_avx2(const uint8_t *src_ptr, ptrdiff_t src_stride, uint8_t *dst_ptr, ptrdiff_t dst_stride, uint32_t height, const int16_t *kernel) { // We will cast the kernel from 16-bit words to 8-bit words, and then extract // the middle four elements of the kernel into two registers in the form // ... k[3] k[2] k[3] k[2] // ... k[5] k[4] k[5] k[4] // Then we shuffle the source into // ... s[1] s[0] s[0] s[-1] // ... s[3] s[2] s[2] s[1] // Calling multiply and add gives us half of the sum. Calling add gives us // first half of the output. Repeat again to get the second half of the // output. Finally we shuffle again to combine the two outputs. // Since avx2 allows us to use 256-bit buffer, we can do this two rows at a // time. __m128i kernel_reg_128; // Kernel __m256i kernel_reg, kernel_reg_23, kernel_reg_45; // Segments of the kernel used const __m256i reg_32 = _mm256_set1_epi16(32); // Used for rounding const ptrdiff_t unrolled_src_stride = src_stride << 1; const ptrdiff_t unrolled_dst_stride = dst_stride << 1; int h; __m256i src_reg, src_reg_shift_0, src_reg_shift_2; __m256i dst_reg; __m256i tmp_0, tmp_1; __m256i idx_shift_0 = _mm256_setr_epi8(0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8); __m256i idx_shift_2 = _mm256_setr_epi8(2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10); // Start one pixel before as we need tap/2 - 1 = 1 sample from the past src_ptr -= 1; // Load Kernel kernel_reg_128 = _mm_loadu_si128((const __m128i *)kernel); kernel_reg_128 = _mm_srai_epi16(kernel_reg_128, 1); kernel_reg_128 = _mm_packs_epi16(kernel_reg_128, kernel_reg_128); kernel_reg = _mm256_broadcastsi128_si256(kernel_reg_128); kernel_reg_23 = _mm256_shuffle_epi8(kernel_reg, _mm256_set1_epi16(0x0302u)); kernel_reg_45 = _mm256_shuffle_epi8(kernel_reg, _mm256_set1_epi16(0x0504u)); for (h = height; h >= 2; h -= 2) { // Load the source src_reg = mm256_loadu2_si128(src_ptr, src_ptr + src_stride); src_reg_shift_0 = _mm256_shuffle_epi8(src_reg, idx_shift_0); src_reg_shift_2 = _mm256_shuffle_epi8(src_reg, idx_shift_2); // Get the output tmp_0 = _mm256_maddubs_epi16(src_reg_shift_0, kernel_reg_23); tmp_1 = _mm256_maddubs_epi16(src_reg_shift_2, kernel_reg_45); dst_reg = _mm256_adds_epi16(tmp_0, tmp_1); // Round the result dst_reg = mm256_round_epi16(&dst_reg, ®_32, 6); // Finally combine to get the final dst dst_reg = _mm256_packus_epi16(dst_reg, dst_reg); mm256_storeu2_epi64((__m128i *)dst_ptr, (__m128i *)(dst_ptr + dst_stride), &dst_reg); src_ptr += unrolled_src_stride; dst_ptr += unrolled_dst_stride; } // Repeat for the last row if needed if (h > 0) { __m128i src_reg = _mm_loadu_si128((const __m128i *)src_ptr); __m128i dst_reg; const __m128i reg_32 = _mm_set1_epi16(32); // Used for rounding __m128i tmp_0, tmp_1; __m128i src_reg_shift_0 = _mm_shuffle_epi8(src_reg, _mm256_castsi256_si128(idx_shift_0)); __m128i src_reg_shift_2 = _mm_shuffle_epi8(src_reg, _mm256_castsi256_si128(idx_shift_2)); tmp_0 = _mm_maddubs_epi16(src_reg_shift_0, _mm256_castsi256_si128(kernel_reg_23)); tmp_1 = _mm_maddubs_epi16(src_reg_shift_2, _mm256_castsi256_si128(kernel_reg_45)); dst_reg = _mm_adds_epi16(tmp_0, tmp_1); dst_reg = mm_round_epi16_sse2(&dst_reg, ®_32, 6); dst_reg = _mm_packus_epi16(dst_reg, _mm_setzero_si128()); _mm_storel_epi64((__m128i *)dst_ptr, dst_reg); } } static void vpx_filter_block1d8_v4_avx2(const uint8_t *src_ptr, ptrdiff_t src_stride, uint8_t *dst_ptr, ptrdiff_t dst_stride, uint32_t height, const int16_t *kernel) { // We will load two rows of pixels as 8-bit words, rearrange them into the // form // ... s[1,0] s[0,0] s[0,0] s[-1,0] // so that we can call multiply and add with the kernel partial output. Then // we can call add with another row to get the output. // Register for source s[-1:3, :] __m256i src_reg_1, src_reg_2, src_reg_3; // Interleaved rows of the source. lo is first half, hi second __m256i src_reg_m10, src_reg_01, src_reg_12, src_reg_23; __m256i src_reg_m1001, src_reg_1223; __m128i kernel_reg_128; // Kernel __m256i kernel_reg, kernel_reg_23, kernel_reg_45; // Segments of the kernel used // Result after multiply and add __m256i res_reg_m1001, res_reg_1223; __m256i res_reg; const __m256i reg_32 = _mm256_set1_epi16(32); // Used for rounding // We will compute the result two rows at a time const ptrdiff_t src_stride_unrolled = src_stride << 1; const ptrdiff_t dst_stride_unrolled = dst_stride << 1; int h; // Load Kernel kernel_reg_128 = _mm_loadu_si128((const __m128i *)kernel); kernel_reg_128 = _mm_srai_epi16(kernel_reg_128, 1); kernel_reg_128 = _mm_packs_epi16(kernel_reg_128, kernel_reg_128); kernel_reg = _mm256_broadcastsi128_si256(kernel_reg_128); kernel_reg_23 = _mm256_shuffle_epi8(kernel_reg, _mm256_set1_epi16(0x0302u)); kernel_reg_45 = _mm256_shuffle_epi8(kernel_reg, _mm256_set1_epi16(0x0504u)); // Row -1 to row 0 src_reg_m10 = mm256_loadu2_epi64((const __m128i *)src_ptr, (const __m128i *)(src_ptr + src_stride)); // Row 0 to row 1 src_reg_1 = _mm256_castsi128_si256( _mm_loadu_si128((const __m128i *)(src_ptr + src_stride * 2))); src_reg_01 = _mm256_permute2x128_si256(src_reg_m10, src_reg_1, 0x21); // First three rows src_reg_m1001 = _mm256_unpacklo_epi8(src_reg_m10, src_reg_01); for (h = height; h > 1; h -= 2) { src_reg_2 = _mm256_castsi128_si256( _mm_loadl_epi64((const __m128i *)(src_ptr + src_stride * 3))); src_reg_12 = _mm256_inserti128_si256(src_reg_1, _mm256_castsi256_si128(src_reg_2), 1); src_reg_3 = _mm256_castsi128_si256( _mm_loadl_epi64((const __m128i *)(src_ptr + src_stride * 4))); src_reg_23 = _mm256_inserti128_si256(src_reg_2, _mm256_castsi256_si128(src_reg_3), 1); // Last three rows src_reg_1223 = _mm256_unpacklo_epi8(src_reg_12, src_reg_23); // Output res_reg_m1001 = _mm256_maddubs_epi16(src_reg_m1001, kernel_reg_23); res_reg_1223 = _mm256_maddubs_epi16(src_reg_1223, kernel_reg_45); res_reg = _mm256_adds_epi16(res_reg_m1001, res_reg_1223); // Round the words res_reg = mm256_round_epi16(&res_reg, ®_32, 6); // Combine to get the result res_reg = _mm256_packus_epi16(res_reg, res_reg); // Save the result mm256_storeu2_epi64((__m128i *)dst_ptr, (__m128i *)(dst_ptr + dst_stride), &res_reg); // Update the source by two rows src_ptr += src_stride_unrolled; dst_ptr += dst_stride_unrolled; src_reg_m1001 = src_reg_1223; src_reg_1 = src_reg_3; } } static void vpx_filter_block1d4_h4_avx2(const uint8_t *src_ptr, ptrdiff_t src_stride, uint8_t *dst_ptr, ptrdiff_t dst_stride, uint32_t height, const int16_t *kernel) { // We will cast the kernel from 16-bit words to 8-bit words, and then extract // the middle four elements of the kernel into a single register in the form // k[5:2] k[5:2] k[5:2] k[5:2] // Then we shuffle the source into // s[5:2] s[4:1] s[3:0] s[2:-1] // Calling multiply and add gives us half of the sum next to each other. // Calling horizontal add then gives us the output. // Since avx2 has 256-bit register, we can do 2 rows at a time. __m128i kernel_reg_128; // Kernel __m256i kernel_reg; const __m256i reg_32 = _mm256_set1_epi16(32); // Used for rounding int h; const ptrdiff_t unrolled_src_stride = src_stride << 1; const ptrdiff_t unrolled_dst_stride = dst_stride << 1; __m256i src_reg, src_reg_shuf; __m256i dst; __m256i shuf_idx = _mm256_setr_epi8(0, 1, 2, 3, 1, 2, 3, 4, 2, 3, 4, 5, 3, 4, 5, 6, 0, 1, 2, 3, 1, 2, 3, 4, 2, 3, 4, 5, 3, 4, 5, 6); // Start one pixel before as we need tap/2 - 1 = 1 sample from the past src_ptr -= 1; // Load Kernel kernel_reg_128 = _mm_loadu_si128((const __m128i *)kernel); kernel_reg_128 = _mm_srai_epi16(kernel_reg_128, 1); kernel_reg_128 = _mm_packs_epi16(kernel_reg_128, kernel_reg_128); kernel_reg = _mm256_broadcastsi128_si256(kernel_reg_128); kernel_reg = _mm256_shuffle_epi8(kernel_reg, _mm256_set1_epi32(0x05040302u)); for (h = height; h > 1; h -= 2) { // Load the source src_reg = mm256_loadu2_epi64((const __m128i *)src_ptr, (const __m128i *)(src_ptr + src_stride)); src_reg_shuf = _mm256_shuffle_epi8(src_reg, shuf_idx); // Get the result dst = _mm256_maddubs_epi16(src_reg_shuf, kernel_reg); dst = _mm256_hadds_epi16(dst, _mm256_setzero_si256()); // Round result dst = mm256_round_epi16(&dst, ®_32, 6); // Pack to 8-bits dst = _mm256_packus_epi16(dst, _mm256_setzero_si256()); // Save mm256_storeu2_epi32((__m128i *const)dst_ptr, (__m128i *const)(dst_ptr + dst_stride), &dst); src_ptr += unrolled_src_stride; dst_ptr += unrolled_dst_stride; } if (h > 0) { // Load the source const __m128i reg_32 = _mm_set1_epi16(32); // Used for rounding __m128i src_reg = _mm_loadl_epi64((const __m128i *)src_ptr); __m128i src_reg_shuf = _mm_shuffle_epi8(src_reg, _mm256_castsi256_si128(shuf_idx)); // Get the result __m128i dst = _mm_maddubs_epi16(src_reg_shuf, _mm256_castsi256_si128(kernel_reg)); dst = _mm_hadds_epi16(dst, _mm_setzero_si128()); // Round result dst = mm_round_epi16_sse2(&dst, ®_32, 6); // Pack to 8-bits dst = _mm_packus_epi16(dst, _mm_setzero_si128()); *((uint32_t *)(dst_ptr)) = _mm_cvtsi128_si32(dst); } } static void vpx_filter_block1d4_v4_avx2(const uint8_t *src_ptr, ptrdiff_t src_stride, uint8_t *dst_ptr, ptrdiff_t dst_stride, uint32_t height, const int16_t *kernel) { // We will load two rows of pixels as 8-bit words, rearrange them into the // form // ... s[3,0] s[2,0] s[1,0] s[0,0] s[2,0] s[1,0] s[0,0] s[-1,0] // so that we can call multiply and add with the kernel to get partial output. // Calling horizontal add then gives us the completely output // Register for source s[-1:3, :] __m256i src_reg_1, src_reg_2, src_reg_3; // Interleaved rows of the source. lo is first half, hi second __m256i src_reg_m10, src_reg_01, src_reg_12, src_reg_23; __m256i src_reg_m1001, src_reg_1223, src_reg_m1012_1023; __m128i kernel_reg_128; // Kernel __m256i kernel_reg; // Result after multiply and add __m256i res_reg; const __m256i reg_32 = _mm256_set1_epi16(32); // Used for rounding // We will compute the result two rows at a time const ptrdiff_t src_stride_unrolled = src_stride << 1; const ptrdiff_t dst_stride_unrolled = dst_stride << 1; int h; // Load Kernel kernel_reg_128 = _mm_loadu_si128((const __m128i *)kernel); kernel_reg_128 = _mm_srai_epi16(kernel_reg_128, 1); kernel_reg_128 = _mm_packs_epi16(kernel_reg_128, kernel_reg_128); kernel_reg = _mm256_broadcastsi128_si256(kernel_reg_128); kernel_reg = _mm256_shuffle_epi8(kernel_reg, _mm256_set1_epi32(0x05040302u)); // Row -1 to row 0 src_reg_m10 = mm256_loadu2_si128((const __m128i *)src_ptr, (const __m128i *)(src_ptr + src_stride)); // Row 0 to row 1 src_reg_1 = _mm256_castsi128_si256( _mm_loadu_si128((const __m128i *)(src_ptr + src_stride * 2))); src_reg_01 = _mm256_permute2x128_si256(src_reg_m10, src_reg_1, 0x21); // First three rows src_reg_m1001 = _mm256_unpacklo_epi8(src_reg_m10, src_reg_01); for (h = height; h > 1; h -= 2) { src_reg_2 = _mm256_castsi128_si256( _mm_loadl_epi64((const __m128i *)(src_ptr + src_stride * 3))); src_reg_12 = _mm256_inserti128_si256(src_reg_1, _mm256_castsi256_si128(src_reg_2), 1); src_reg_3 = _mm256_castsi128_si256( _mm_loadl_epi64((const __m128i *)(src_ptr + src_stride * 4))); src_reg_23 = _mm256_inserti128_si256(src_reg_2, _mm256_castsi256_si128(src_reg_3), 1); // Last three rows src_reg_1223 = _mm256_unpacklo_epi8(src_reg_12, src_reg_23); // Combine all the rows src_reg_m1012_1023 = _mm256_unpacklo_epi16(src_reg_m1001, src_reg_1223); // Output res_reg = _mm256_maddubs_epi16(src_reg_m1012_1023, kernel_reg); res_reg = _mm256_hadds_epi16(res_reg, _mm256_setzero_si256()); // Round the words res_reg = mm256_round_epi16(&res_reg, ®_32, 6); // Combine to get the result res_reg = _mm256_packus_epi16(res_reg, res_reg); // Save the result mm256_storeu2_epi32((__m128i *)dst_ptr, (__m128i *)(dst_ptr + dst_stride), &res_reg); // Update the source by two rows src_ptr += src_stride_unrolled; dst_ptr += dst_stride_unrolled; src_reg_m1001 = src_reg_1223; src_reg_1 = src_reg_3; } } #if HAVE_AVX2 && HAVE_SSSE3 filter8_1dfunction vpx_filter_block1d4_v8_ssse3; #if ARCH_X86_64 filter8_1dfunction vpx_filter_block1d8_v8_intrin_ssse3; filter8_1dfunction vpx_filter_block1d8_h8_intrin_ssse3; filter8_1dfunction vpx_filter_block1d4_h8_intrin_ssse3; #define vpx_filter_block1d8_v8_avx2 vpx_filter_block1d8_v8_intrin_ssse3 #define vpx_filter_block1d8_h8_avx2 vpx_filter_block1d8_h8_intrin_ssse3 #define vpx_filter_block1d4_h8_avx2 vpx_filter_block1d4_h8_intrin_ssse3 #else // ARCH_X86 filter8_1dfunction vpx_filter_block1d8_v8_ssse3; filter8_1dfunction vpx_filter_block1d8_h8_ssse3; filter8_1dfunction vpx_filter_block1d4_h8_ssse3; #define vpx_filter_block1d8_v8_avx2 vpx_filter_block1d8_v8_ssse3 #define vpx_filter_block1d8_h8_avx2 vpx_filter_block1d8_h8_ssse3 #define vpx_filter_block1d4_h8_avx2 vpx_filter_block1d4_h8_ssse3 #endif // ARCH_X86_64 filter8_1dfunction vpx_filter_block1d8_v8_avg_ssse3; filter8_1dfunction vpx_filter_block1d8_h8_avg_ssse3; filter8_1dfunction vpx_filter_block1d4_v8_avg_ssse3; filter8_1dfunction vpx_filter_block1d4_h8_avg_ssse3; #define vpx_filter_block1d8_v8_avg_avx2 vpx_filter_block1d8_v8_avg_ssse3 #define vpx_filter_block1d8_h8_avg_avx2 vpx_filter_block1d8_h8_avg_ssse3 #define vpx_filter_block1d4_v8_avg_avx2 vpx_filter_block1d4_v8_avg_ssse3 #define vpx_filter_block1d4_h8_avg_avx2 vpx_filter_block1d4_h8_avg_ssse3 filter8_1dfunction vpx_filter_block1d16_v2_ssse3; filter8_1dfunction vpx_filter_block1d16_h2_ssse3; filter8_1dfunction vpx_filter_block1d8_v2_ssse3; filter8_1dfunction vpx_filter_block1d8_h2_ssse3; filter8_1dfunction vpx_filter_block1d4_v2_ssse3; filter8_1dfunction vpx_filter_block1d4_h2_ssse3; #define vpx_filter_block1d4_v8_avx2 vpx_filter_block1d4_v8_ssse3 #define vpx_filter_block1d16_v2_avx2 vpx_filter_block1d16_v2_ssse3 #define vpx_filter_block1d16_h2_avx2 vpx_filter_block1d16_h2_ssse3 #define vpx_filter_block1d8_v2_avx2 vpx_filter_block1d8_v2_ssse3 #define vpx_filter_block1d8_h2_avx2 vpx_filter_block1d8_h2_ssse3 #define vpx_filter_block1d4_v2_avx2 vpx_filter_block1d4_v2_ssse3 #define vpx_filter_block1d4_h2_avx2 vpx_filter_block1d4_h2_ssse3 filter8_1dfunction vpx_filter_block1d16_v2_avg_ssse3; filter8_1dfunction vpx_filter_block1d16_h2_avg_ssse3; filter8_1dfunction vpx_filter_block1d8_v2_avg_ssse3; filter8_1dfunction vpx_filter_block1d8_h2_avg_ssse3; filter8_1dfunction vpx_filter_block1d4_v2_avg_ssse3; filter8_1dfunction vpx_filter_block1d4_h2_avg_ssse3; #define vpx_filter_block1d16_v2_avg_avx2 vpx_filter_block1d16_v2_avg_ssse3 #define vpx_filter_block1d16_h2_avg_avx2 vpx_filter_block1d16_h2_avg_ssse3 #define vpx_filter_block1d8_v2_avg_avx2 vpx_filter_block1d8_v2_avg_ssse3 #define vpx_filter_block1d8_h2_avg_avx2 vpx_filter_block1d8_h2_avg_ssse3 #define vpx_filter_block1d4_v2_avg_avx2 vpx_filter_block1d4_v2_avg_ssse3 #define vpx_filter_block1d4_h2_avg_avx2 vpx_filter_block1d4_h2_avg_ssse3 #define vpx_filter_block1d16_v4_avg_avx2 vpx_filter_block1d16_v8_avg_avx2 #define vpx_filter_block1d16_h4_avg_avx2 vpx_filter_block1d16_h8_avg_avx2 #define vpx_filter_block1d8_v4_avg_avx2 vpx_filter_block1d8_v8_avg_avx2 #define vpx_filter_block1d8_h4_avg_avx2 vpx_filter_block1d8_h8_avg_avx2 #define vpx_filter_block1d4_v4_avg_avx2 vpx_filter_block1d4_v8_avg_avx2 #define vpx_filter_block1d4_h4_avg_avx2 vpx_filter_block1d4_h8_avg_avx2 // void vpx_convolve8_horiz_avx2(const uint8_t *src, ptrdiff_t src_stride, // uint8_t *dst, ptrdiff_t dst_stride, // const InterpKernel *filter, int x0_q4, // int32_t x_step_q4, int y0_q4, int y_step_q4, // int w, int h); // void vpx_convolve8_vert_avx2(const uint8_t *src, ptrdiff_t src_stride, // uint8_t *dst, ptrdiff_t dst_stride, // const InterpKernel *filter, int x0_q4, // int32_t x_step_q4, int y0_q4, int y_step_q4, // int w, int h); // void vpx_convolve8_avg_horiz_avx2(const uint8_t *src, ptrdiff_t src_stride, // uint8_t *dst, ptrdiff_t dst_stride, // const InterpKernel *filter, int x0_q4, // int32_t x_step_q4, int y0_q4, // int y_step_q4, int w, int h); // void vpx_convolve8_avg_vert_avx2(const uint8_t *src, ptrdiff_t src_stride, // uint8_t *dst, ptrdiff_t dst_stride, // const InterpKernel *filter, int x0_q4, // int32_t x_step_q4, int y0_q4, // int y_step_q4, int w, int h); FUN_CONV_1D(horiz, x0_q4, x_step_q4, h, src, , avx2, 0); FUN_CONV_1D(vert, y0_q4, y_step_q4, v, src - src_stride * (num_taps / 2 - 1), , avx2, 0); FUN_CONV_1D(avg_horiz, x0_q4, x_step_q4, h, src, avg_, avx2, 1); FUN_CONV_1D(avg_vert, y0_q4, y_step_q4, v, src - src_stride * (num_taps / 2 - 1), avg_, avx2, 1); // void vpx_convolve8_avx2(const uint8_t *src, ptrdiff_t src_stride, // uint8_t *dst, ptrdiff_t dst_stride, // const InterpKernel *filter, int x0_q4, // int32_t x_step_q4, int y0_q4, int y_step_q4, // int w, int h); // void vpx_convolve8_avg_avx2(const uint8_t *src, ptrdiff_t src_stride, // uint8_t *dst, ptrdiff_t dst_stride, // const InterpKernel *filter, int x0_q4, // int32_t x_step_q4, int y0_q4, int y_step_q4, // int w, int h); FUN_CONV_2D(, avx2, 0); FUN_CONV_2D(avg_, avx2, 1); #endif // HAVE_AX2 && HAVE_SSSE3