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Diffstat (limited to 'media/libvpx/libvpx/vpx_dsp/x86/vpx_subpixel_8t_intrin_ssse3.c')
| -rw-r--r-- | media/libvpx/libvpx/vpx_dsp/x86/vpx_subpixel_8t_intrin_ssse3.c | 1087 |
1 files changed, 1087 insertions, 0 deletions
diff --git a/media/libvpx/libvpx/vpx_dsp/x86/vpx_subpixel_8t_intrin_ssse3.c b/media/libvpx/libvpx/vpx_dsp/x86/vpx_subpixel_8t_intrin_ssse3.c new file mode 100644 index 0000000000..4ea2752d38 --- /dev/null +++ b/media/libvpx/libvpx/vpx_dsp/x86/vpx_subpixel_8t_intrin_ssse3.c @@ -0,0 +1,1087 @@ +/* + * 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 <tmmintrin.h> // SSSE3 + +#include <string.h> + +#include "./vpx_config.h" +#include "./vpx_dsp_rtcd.h" +#include "vpx_dsp/vpx_filter.h" +#include "vpx_dsp/x86/convolve.h" +#include "vpx_dsp/x86/convolve_sse2.h" +#include "vpx_dsp/x86/convolve_ssse3.h" +#include "vpx_dsp/x86/mem_sse2.h" +#include "vpx_dsp/x86/transpose_sse2.h" +#include "vpx_mem/vpx_mem.h" +#include "vpx_ports/mem.h" + +static INLINE __m128i shuffle_filter_convolve8_8_ssse3( + const __m128i *const s, const int16_t *const filter) { + __m128i f[4]; + shuffle_filter_ssse3(filter, f); + return convolve8_8_ssse3(s, f); +} + +// Used by the avx2 implementation. +#if VPX_ARCH_X86_64 +// Use the intrinsics below +filter8_1dfunction vpx_filter_block1d4_h8_intrin_ssse3; +filter8_1dfunction vpx_filter_block1d8_h8_intrin_ssse3; +filter8_1dfunction vpx_filter_block1d8_v8_intrin_ssse3; +#define vpx_filter_block1d4_h8_ssse3 vpx_filter_block1d4_h8_intrin_ssse3 +#define vpx_filter_block1d8_h8_ssse3 vpx_filter_block1d8_h8_intrin_ssse3 +#define vpx_filter_block1d8_v8_ssse3 vpx_filter_block1d8_v8_intrin_ssse3 +#else // VPX_ARCH_X86 +// Use the assembly in vpx_dsp/x86/vpx_subpixel_8t_ssse3.asm. +filter8_1dfunction vpx_filter_block1d4_h8_ssse3; +filter8_1dfunction vpx_filter_block1d8_h8_ssse3; +filter8_1dfunction vpx_filter_block1d8_v8_ssse3; +#endif + +#if VPX_ARCH_X86_64 +void vpx_filter_block1d4_h8_intrin_ssse3( + const uint8_t *src_ptr, ptrdiff_t src_pitch, uint8_t *output_ptr, + ptrdiff_t output_pitch, uint32_t output_height, const int16_t *filter) { + __m128i firstFilters, secondFilters, shuffle1, shuffle2; + __m128i srcRegFilt1, srcRegFilt2; + __m128i addFilterReg64, filtersReg, srcReg; + unsigned int i; + + // create a register with 0,64,0,64,0,64,0,64,0,64,0,64,0,64,0,64 + addFilterReg64 = _mm_set1_epi32((int)0x0400040u); + filtersReg = _mm_loadu_si128((const __m128i *)filter); + // converting the 16 bit (short) to 8 bit (byte) and have the same data + // in both lanes of 128 bit register. + filtersReg = _mm_packs_epi16(filtersReg, filtersReg); + + // duplicate only the first 16 bits in the filter into the first lane + firstFilters = _mm_shufflelo_epi16(filtersReg, 0); + // duplicate only the third 16 bit in the filter into the first lane + secondFilters = _mm_shufflelo_epi16(filtersReg, 0xAAu); + // duplicate only the seconds 16 bits in the filter into the second lane + // firstFilters: k0 k1 k0 k1 k0 k1 k0 k1 k2 k3 k2 k3 k2 k3 k2 k3 + firstFilters = _mm_shufflehi_epi16(firstFilters, 0x55u); + // duplicate only the forth 16 bits in the filter into the second lane + // secondFilters: k4 k5 k4 k5 k4 k5 k4 k5 k6 k7 k6 k7 k6 k7 k6 k7 + secondFilters = _mm_shufflehi_epi16(secondFilters, 0xFFu); + + // loading the local filters + shuffle1 = _mm_setr_epi8(0, 1, 1, 2, 2, 3, 3, 4, 2, 3, 3, 4, 4, 5, 5, 6); + shuffle2 = _mm_setr_epi8(4, 5, 5, 6, 6, 7, 7, 8, 6, 7, 7, 8, 8, 9, 9, 10); + + for (i = 0; i < output_height; i++) { + srcReg = _mm_loadu_si128((const __m128i *)(src_ptr - 3)); + + // filter the source buffer + srcRegFilt1 = _mm_shuffle_epi8(srcReg, shuffle1); + srcRegFilt2 = _mm_shuffle_epi8(srcReg, shuffle2); + + // multiply 2 adjacent elements with the filter and add the result + srcRegFilt1 = _mm_maddubs_epi16(srcRegFilt1, firstFilters); + srcRegFilt2 = _mm_maddubs_epi16(srcRegFilt2, secondFilters); + + // sum the results together, saturating only on the final step + // the specific order of the additions prevents outranges + srcRegFilt1 = _mm_add_epi16(srcRegFilt1, srcRegFilt2); + + // extract the higher half of the register + srcRegFilt2 = _mm_srli_si128(srcRegFilt1, 8); + + // add the rounding offset early to avoid another saturated add + srcRegFilt1 = _mm_add_epi16(srcRegFilt1, addFilterReg64); + srcRegFilt1 = _mm_adds_epi16(srcRegFilt1, srcRegFilt2); + + // shift by 7 bit each 16 bits + srcRegFilt1 = _mm_srai_epi16(srcRegFilt1, 7); + + // shrink to 8 bit each 16 bits + srcRegFilt1 = _mm_packus_epi16(srcRegFilt1, srcRegFilt1); + src_ptr += src_pitch; + + // save only 4 bytes + *((int *)&output_ptr[0]) = _mm_cvtsi128_si32(srcRegFilt1); + + output_ptr += output_pitch; + } +} + +void vpx_filter_block1d8_h8_intrin_ssse3( + const uint8_t *src_ptr, ptrdiff_t src_pitch, uint8_t *output_ptr, + ptrdiff_t output_pitch, uint32_t output_height, const int16_t *filter) { + unsigned int i; + __m128i f[4], filt[4], s[4]; + + shuffle_filter_ssse3(filter, f); + filt[0] = _mm_setr_epi8(0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8); + filt[1] = _mm_setr_epi8(2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10); + filt[2] = _mm_setr_epi8(4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12); + filt[3] = + _mm_setr_epi8(6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13, 14); + + for (i = 0; i < output_height; i++) { + const __m128i srcReg = _mm_loadu_si128((const __m128i *)(src_ptr - 3)); + + // filter the source buffer + s[0] = _mm_shuffle_epi8(srcReg, filt[0]); + s[1] = _mm_shuffle_epi8(srcReg, filt[1]); + s[2] = _mm_shuffle_epi8(srcReg, filt[2]); + s[3] = _mm_shuffle_epi8(srcReg, filt[3]); + s[0] = convolve8_8_ssse3(s, f); + + // shrink to 8 bit each 16 bits + s[0] = _mm_packus_epi16(s[0], s[0]); + + src_ptr += src_pitch; + + // save only 8 bytes + _mm_storel_epi64((__m128i *)&output_ptr[0], s[0]); + + output_ptr += output_pitch; + } +} + +void vpx_filter_block1d8_v8_intrin_ssse3( + 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) { + unsigned int i; + __m128i f[4], s[8], ss[4]; + + shuffle_filter_ssse3(filter, f); + + // load the first 7 rows of 8 bytes + s[0] = _mm_loadl_epi64((const __m128i *)(src_ptr + 0 * src_pitch)); + s[1] = _mm_loadl_epi64((const __m128i *)(src_ptr + 1 * src_pitch)); + s[2] = _mm_loadl_epi64((const __m128i *)(src_ptr + 2 * src_pitch)); + s[3] = _mm_loadl_epi64((const __m128i *)(src_ptr + 3 * src_pitch)); + s[4] = _mm_loadl_epi64((const __m128i *)(src_ptr + 4 * src_pitch)); + s[5] = _mm_loadl_epi64((const __m128i *)(src_ptr + 5 * src_pitch)); + s[6] = _mm_loadl_epi64((const __m128i *)(src_ptr + 6 * src_pitch)); + + for (i = 0; i < output_height; i++) { + // load the last 8 bytes + s[7] = _mm_loadl_epi64((const __m128i *)(src_ptr + 7 * src_pitch)); + + // merge the result together + ss[0] = _mm_unpacklo_epi8(s[0], s[1]); + ss[1] = _mm_unpacklo_epi8(s[2], s[3]); + + // merge the result together + ss[2] = _mm_unpacklo_epi8(s[4], s[5]); + ss[3] = _mm_unpacklo_epi8(s[6], s[7]); + + ss[0] = convolve8_8_ssse3(ss, f); + // shrink to 8 bit each 16 bits + ss[0] = _mm_packus_epi16(ss[0], ss[0]); + + src_ptr += src_pitch; + + // shift down a row + s[0] = s[1]; + s[1] = s[2]; + s[2] = s[3]; + s[3] = s[4]; + s[4] = s[5]; + s[5] = s[6]; + s[6] = s[7]; + + // save only 8 bytes convolve result + _mm_storel_epi64((__m128i *)&output_ptr[0], ss[0]); + + output_ptr += out_pitch; + } +} +#endif // VPX_ARCH_X86_64 + +static void vpx_filter_block1d16_h4_ssse3(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. + + __m128i kernel_reg; // Kernel + __m128i kernel_reg_23, kernel_reg_45; // Segments of the kernel used + const __m128i reg_32 = _mm_set1_epi16(32); // Used for rounding + int h; + + __m128i src_reg, src_reg_shift_0, src_reg_shift_2; + __m128i dst_first, dst_second; + __m128i tmp_0, tmp_1; + __m128i idx_shift_0 = + _mm_setr_epi8(0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8); + __m128i idx_shift_2 = + _mm_setr_epi8(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_23 = _mm_shuffle_epi8(kernel_reg, _mm_set1_epi16(0x0302u)); + kernel_reg_45 = _mm_shuffle_epi8(kernel_reg, _mm_set1_epi16(0x0504u)); + + for (h = height; h > 0; --h) { + // Load the source + src_reg = _mm_loadu_si128((const __m128i *)src_ptr); + src_reg_shift_0 = _mm_shuffle_epi8(src_reg, idx_shift_0); + src_reg_shift_2 = _mm_shuffle_epi8(src_reg, idx_shift_2); + + // Partial result for first half + tmp_0 = _mm_maddubs_epi16(src_reg_shift_0, kernel_reg_23); + tmp_1 = _mm_maddubs_epi16(src_reg_shift_2, kernel_reg_45); + dst_first = _mm_adds_epi16(tmp_0, tmp_1); + + // Do again to get the second half of dst + // Load the source + src_reg = _mm_loadu_si128((const __m128i *)(src_ptr + 8)); + src_reg_shift_0 = _mm_shuffle_epi8(src_reg, idx_shift_0); + src_reg_shift_2 = _mm_shuffle_epi8(src_reg, idx_shift_2); + + // Partial result for first half + tmp_0 = _mm_maddubs_epi16(src_reg_shift_0, kernel_reg_23); + tmp_1 = _mm_maddubs_epi16(src_reg_shift_2, kernel_reg_45); + dst_second = _mm_adds_epi16(tmp_0, tmp_1); + + // Round each result + dst_first = mm_round_epi16_sse2(&dst_first, ®_32, 6); + dst_second = mm_round_epi16_sse2(&dst_second, ®_32, 6); + + // Finally combine to get the final dst + dst_first = _mm_packus_epi16(dst_first, dst_second); + _mm_store_si128((__m128i *)dst_ptr, dst_first); + + src_ptr += src_stride; + dst_ptr += dst_stride; + } +} + +static void vpx_filter_block1d16_v4_ssse3(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[0,1] s[-1,1] s[0,0] s[-1,0] + // ... s[0,9] s[-1,9] s[0,8] s[-1,8] + // so that we can call multiply and add with the kernel to get 16-bit words of + // the form + // ... s[0,1]k[3]+s[-1,1]k[2] s[0,0]k[3]+s[-1,0]k[2] + // Finally, we can add multiple rows together to get the desired output. + + // Register for source s[-1:3, :] + __m128i src_reg_m1, src_reg_0, src_reg_1, src_reg_2, src_reg_3; + // Interleaved rows of the source. lo is first half, hi second + __m128i src_reg_m10_lo, src_reg_m10_hi, src_reg_01_lo, src_reg_01_hi; + __m128i src_reg_12_lo, src_reg_12_hi, src_reg_23_lo, src_reg_23_hi; + + __m128i kernel_reg; // Kernel + __m128i kernel_reg_23, kernel_reg_45; // Segments of the kernel used + + // Result after multiply and add + __m128i res_reg_m10_lo, res_reg_01_lo, res_reg_12_lo, res_reg_23_lo; + __m128i res_reg_m10_hi, res_reg_01_hi, res_reg_12_hi, res_reg_23_hi; + __m128i res_reg_m1012, res_reg_0123; + __m128i res_reg_m1012_lo, res_reg_0123_lo, res_reg_m1012_hi, res_reg_0123_hi; + + const __m128i reg_32 = _mm_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_23 = _mm_shuffle_epi8(kernel_reg, _mm_set1_epi16(0x0302u)); + kernel_reg_45 = _mm_shuffle_epi8(kernel_reg, _mm_set1_epi16(0x0504u)); + + // First shuffle the data + src_reg_m1 = _mm_loadu_si128((const __m128i *)src_ptr); + src_reg_0 = _mm_loadu_si128((const __m128i *)(src_ptr + src_stride)); + src_reg_m10_lo = _mm_unpacklo_epi8(src_reg_m1, src_reg_0); + src_reg_m10_hi = _mm_unpackhi_epi8(src_reg_m1, src_reg_0); + + // More shuffling + src_reg_1 = _mm_loadu_si128((const __m128i *)(src_ptr + src_stride * 2)); + src_reg_01_lo = _mm_unpacklo_epi8(src_reg_0, src_reg_1); + src_reg_01_hi = _mm_unpackhi_epi8(src_reg_0, src_reg_1); + + for (h = height; h > 1; h -= 2) { + src_reg_2 = _mm_loadu_si128((const __m128i *)(src_ptr + src_stride * 3)); + + src_reg_12_lo = _mm_unpacklo_epi8(src_reg_1, src_reg_2); + src_reg_12_hi = _mm_unpackhi_epi8(src_reg_1, src_reg_2); + + src_reg_3 = _mm_loadu_si128((const __m128i *)(src_ptr + src_stride * 4)); + + src_reg_23_lo = _mm_unpacklo_epi8(src_reg_2, src_reg_3); + src_reg_23_hi = _mm_unpackhi_epi8(src_reg_2, src_reg_3); + + // Partial output from first half + res_reg_m10_lo = _mm_maddubs_epi16(src_reg_m10_lo, kernel_reg_23); + res_reg_01_lo = _mm_maddubs_epi16(src_reg_01_lo, kernel_reg_23); + + res_reg_12_lo = _mm_maddubs_epi16(src_reg_12_lo, kernel_reg_45); + res_reg_23_lo = _mm_maddubs_epi16(src_reg_23_lo, kernel_reg_45); + + // Add to get first half of the results + res_reg_m1012_lo = _mm_adds_epi16(res_reg_m10_lo, res_reg_12_lo); + res_reg_0123_lo = _mm_adds_epi16(res_reg_01_lo, res_reg_23_lo); + + // Partial output for second half + res_reg_m10_hi = _mm_maddubs_epi16(src_reg_m10_hi, kernel_reg_23); + res_reg_01_hi = _mm_maddubs_epi16(src_reg_01_hi, kernel_reg_23); + + res_reg_12_hi = _mm_maddubs_epi16(src_reg_12_hi, kernel_reg_45); + res_reg_23_hi = _mm_maddubs_epi16(src_reg_23_hi, kernel_reg_45); + + // Second half of the results + res_reg_m1012_hi = _mm_adds_epi16(res_reg_m10_hi, res_reg_12_hi); + res_reg_0123_hi = _mm_adds_epi16(res_reg_01_hi, res_reg_23_hi); + + // Round the words + res_reg_m1012_lo = mm_round_epi16_sse2(&res_reg_m1012_lo, ®_32, 6); + res_reg_0123_lo = mm_round_epi16_sse2(&res_reg_0123_lo, ®_32, 6); + res_reg_m1012_hi = mm_round_epi16_sse2(&res_reg_m1012_hi, ®_32, 6); + res_reg_0123_hi = mm_round_epi16_sse2(&res_reg_0123_hi, ®_32, 6); + + // Combine to get the result + res_reg_m1012 = _mm_packus_epi16(res_reg_m1012_lo, res_reg_m1012_hi); + res_reg_0123 = _mm_packus_epi16(res_reg_0123_lo, res_reg_0123_hi); + + _mm_store_si128((__m128i *)dst_ptr, res_reg_m1012); + _mm_store_si128((__m128i *)(dst_ptr + dst_stride), res_reg_0123); + + // Update the source by two rows + src_ptr += src_stride_unrolled; + dst_ptr += dst_stride_unrolled; + + src_reg_m10_lo = src_reg_12_lo; + src_reg_m10_hi = src_reg_12_hi; + src_reg_01_lo = src_reg_23_lo; + src_reg_01_hi = src_reg_23_hi; + src_reg_1 = src_reg_3; + } +} + +static void vpx_filter_block1d8_h4_ssse3(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. + + __m128i kernel_reg; // Kernel + __m128i kernel_reg_23, kernel_reg_45; // Segments of the kernel used + const __m128i reg_32 = _mm_set1_epi16(32); // Used for rounding + int h; + + __m128i src_reg, src_reg_shift_0, src_reg_shift_2; + __m128i dst_first; + __m128i tmp_0, tmp_1; + __m128i idx_shift_0 = + _mm_setr_epi8(0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8); + __m128i idx_shift_2 = + _mm_setr_epi8(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_23 = _mm_shuffle_epi8(kernel_reg, _mm_set1_epi16(0x0302u)); + kernel_reg_45 = _mm_shuffle_epi8(kernel_reg, _mm_set1_epi16(0x0504u)); + + for (h = height; h > 0; --h) { + // Load the source + src_reg = _mm_loadu_si128((const __m128i *)src_ptr); + src_reg_shift_0 = _mm_shuffle_epi8(src_reg, idx_shift_0); + src_reg_shift_2 = _mm_shuffle_epi8(src_reg, idx_shift_2); + + // Get the result + tmp_0 = _mm_maddubs_epi16(src_reg_shift_0, kernel_reg_23); + tmp_1 = _mm_maddubs_epi16(src_reg_shift_2, kernel_reg_45); + dst_first = _mm_adds_epi16(tmp_0, tmp_1); + + // Round round result + dst_first = mm_round_epi16_sse2(&dst_first, ®_32, 6); + + // Pack to 8-bits + dst_first = _mm_packus_epi16(dst_first, _mm_setzero_si128()); + _mm_storel_epi64((__m128i *)dst_ptr, dst_first); + + src_ptr += src_stride; + dst_ptr += dst_stride; + } +} + +static void vpx_filter_block1d8_v4_ssse3(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[0,1] s[-1,1] s[0,0] s[-1,0] + // so that we can call multiply and add with the kernel to get 16-bit words of + // the form + // ... s[0,1]k[3]+s[-1,1]k[2] s[0,0]k[3]+s[-1,0]k[2] + // Finally, we can add multiple rows together to get the desired output. + + // Register for source s[-1:3, :] + __m128i src_reg_m1, src_reg_0, src_reg_1, src_reg_2, src_reg_3; + // Interleaved rows of the source. lo is first half, hi second + __m128i src_reg_m10, src_reg_01; + __m128i src_reg_12, src_reg_23; + + __m128i kernel_reg; // Kernel + __m128i kernel_reg_23, kernel_reg_45; // Segments of the kernel used + + // Result after multiply and add + __m128i res_reg_m10, res_reg_01, res_reg_12, res_reg_23; + __m128i res_reg_m1012, res_reg_0123; + + const __m128i reg_32 = _mm_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_23 = _mm_shuffle_epi8(kernel_reg, _mm_set1_epi16(0x0302u)); + kernel_reg_45 = _mm_shuffle_epi8(kernel_reg, _mm_set1_epi16(0x0504u)); + + // First shuffle the data + src_reg_m1 = _mm_loadl_epi64((const __m128i *)src_ptr); + src_reg_0 = _mm_loadl_epi64((const __m128i *)(src_ptr + src_stride)); + src_reg_m10 = _mm_unpacklo_epi8(src_reg_m1, src_reg_0); + + // More shuffling + src_reg_1 = _mm_loadl_epi64((const __m128i *)(src_ptr + src_stride * 2)); + src_reg_01 = _mm_unpacklo_epi8(src_reg_0, src_reg_1); + + for (h = height; h > 1; h -= 2) { + src_reg_2 = _mm_loadl_epi64((const __m128i *)(src_ptr + src_stride * 3)); + + src_reg_12 = _mm_unpacklo_epi8(src_reg_1, src_reg_2); + + src_reg_3 = _mm_loadl_epi64((const __m128i *)(src_ptr + src_stride * 4)); + + src_reg_23 = _mm_unpacklo_epi8(src_reg_2, src_reg_3); + + // Partial output + res_reg_m10 = _mm_maddubs_epi16(src_reg_m10, kernel_reg_23); + res_reg_01 = _mm_maddubs_epi16(src_reg_01, kernel_reg_23); + + res_reg_12 = _mm_maddubs_epi16(src_reg_12, kernel_reg_45); + res_reg_23 = _mm_maddubs_epi16(src_reg_23, kernel_reg_45); + + // Add to get entire output + res_reg_m1012 = _mm_adds_epi16(res_reg_m10, res_reg_12); + res_reg_0123 = _mm_adds_epi16(res_reg_01, res_reg_23); + + // Round the words + res_reg_m1012 = mm_round_epi16_sse2(&res_reg_m1012, ®_32, 6); + res_reg_0123 = mm_round_epi16_sse2(&res_reg_0123, ®_32, 6); + + // Pack from 16-bit to 8-bit + res_reg_m1012 = _mm_packus_epi16(res_reg_m1012, _mm_setzero_si128()); + res_reg_0123 = _mm_packus_epi16(res_reg_0123, _mm_setzero_si128()); + + _mm_storel_epi64((__m128i *)dst_ptr, res_reg_m1012); + _mm_storel_epi64((__m128i *)(dst_ptr + dst_stride), res_reg_0123); + + // Update the source by two rows + src_ptr += src_stride_unrolled; + dst_ptr += dst_stride_unrolled; + + src_reg_m10 = src_reg_12; + src_reg_01 = src_reg_23; + src_reg_1 = src_reg_3; + } +} + +static void vpx_filter_block1d4_h4_ssse3(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. + + __m128i kernel_reg; // Kernel + const __m128i reg_32 = _mm_set1_epi16(32); // Used for rounding + int h; + + __m128i src_reg, src_reg_shuf; + __m128i dst_first; + __m128i shuf_idx = + _mm_setr_epi8(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 = _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 = _mm_shuffle_epi8(kernel_reg, _mm_set1_epi32(0x05040302u)); + + for (h = height; h > 0; --h) { + // Load the source + src_reg = _mm_loadu_si128((const __m128i *)src_ptr); + src_reg_shuf = _mm_shuffle_epi8(src_reg, shuf_idx); + + // Get the result + dst_first = _mm_maddubs_epi16(src_reg_shuf, kernel_reg); + dst_first = _mm_hadds_epi16(dst_first, _mm_setzero_si128()); + + // Round result + dst_first = mm_round_epi16_sse2(&dst_first, ®_32, 6); + + // Pack to 8-bits + dst_first = _mm_packus_epi16(dst_first, _mm_setzero_si128()); + *((int *)(dst_ptr)) = _mm_cvtsi128_si32(dst_first); + + src_ptr += src_stride; + dst_ptr += dst_stride; + } +} + +static void vpx_filter_block1d4_v4_ssse3(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[2,0] s[1,0] s[0,0] s[-1,0] + // so that we can call multiply and add with the kernel partial output. Then + // we can call horizontal add to get the output. + // Finally, we can add multiple rows together to get the desired output. + // This is done two rows at a time + + // Register for source s[-1:3, :] + __m128i src_reg_m1, src_reg_0, src_reg_1, src_reg_2, src_reg_3; + // Interleaved rows of the source. + __m128i src_reg_m10, src_reg_01; + __m128i src_reg_12, src_reg_23; + __m128i src_reg_m1001, src_reg_1223; + __m128i src_reg_m1012_1023_lo, src_reg_m1012_1023_hi; + + __m128i kernel_reg; // Kernel + + // Result after multiply and add + __m128i reg_0, reg_1; + + const __m128i reg_32 = _mm_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 = _mm_shuffle_epi8(kernel_reg, _mm_set1_epi32(0x05040302u)); + + // First shuffle the data + src_reg_m1 = _mm_loadl_epi64((const __m128i *)src_ptr); + src_reg_0 = _mm_loadl_epi64((const __m128i *)(src_ptr + src_stride)); + src_reg_m10 = _mm_unpacklo_epi32(src_reg_m1, src_reg_0); + + // More shuffling + src_reg_1 = _mm_loadl_epi64((const __m128i *)(src_ptr + src_stride * 2)); + src_reg_01 = _mm_unpacklo_epi32(src_reg_0, src_reg_1); + + // Put three rows next to each other + src_reg_m1001 = _mm_unpacklo_epi8(src_reg_m10, src_reg_01); + + for (h = height; h > 1; h -= 2) { + src_reg_2 = _mm_loadl_epi64((const __m128i *)(src_ptr + src_stride * 3)); + src_reg_12 = _mm_unpacklo_epi32(src_reg_1, src_reg_2); + + src_reg_3 = _mm_loadl_epi64((const __m128i *)(src_ptr + src_stride * 4)); + src_reg_23 = _mm_unpacklo_epi32(src_reg_2, src_reg_3); + + // Put three rows next to each other + src_reg_1223 = _mm_unpacklo_epi8(src_reg_12, src_reg_23); + + // Put all four rows next to each other + src_reg_m1012_1023_lo = _mm_unpacklo_epi16(src_reg_m1001, src_reg_1223); + src_reg_m1012_1023_hi = _mm_unpackhi_epi16(src_reg_m1001, src_reg_1223); + + // Get the results + reg_0 = _mm_maddubs_epi16(src_reg_m1012_1023_lo, kernel_reg); + reg_1 = _mm_maddubs_epi16(src_reg_m1012_1023_hi, kernel_reg); + reg_0 = _mm_hadds_epi16(reg_0, _mm_setzero_si128()); + reg_1 = _mm_hadds_epi16(reg_1, _mm_setzero_si128()); + + // Round the words + reg_0 = mm_round_epi16_sse2(®_0, ®_32, 6); + reg_1 = mm_round_epi16_sse2(®_1, ®_32, 6); + + // Pack from 16-bit to 8-bit and put them in the right order + reg_0 = _mm_packus_epi16(reg_0, reg_0); + reg_1 = _mm_packus_epi16(reg_1, reg_1); + + // Save the result + *((int *)(dst_ptr)) = _mm_cvtsi128_si32(reg_0); + *((int *)(dst_ptr + dst_stride)) = _mm_cvtsi128_si32(reg_1); + + // 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; + } +} + +// From vpx_dsp/x86/vpx_subpixel_8t_ssse3.asm +filter8_1dfunction vpx_filter_block1d16_v8_ssse3; +filter8_1dfunction vpx_filter_block1d16_h8_ssse3; +filter8_1dfunction vpx_filter_block1d4_v8_ssse3; +filter8_1dfunction vpx_filter_block1d16_v8_avg_ssse3; +filter8_1dfunction vpx_filter_block1d16_h8_avg_ssse3; +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; + +// Use the [vh]8 version because there is no [vh]4 implementation. +#define vpx_filter_block1d16_v4_avg_ssse3 vpx_filter_block1d16_v8_avg_ssse3 +#define vpx_filter_block1d16_h4_avg_ssse3 vpx_filter_block1d16_h8_avg_ssse3 +#define vpx_filter_block1d8_v4_avg_ssse3 vpx_filter_block1d8_v8_avg_ssse3 +#define vpx_filter_block1d8_h4_avg_ssse3 vpx_filter_block1d8_h8_avg_ssse3 +#define vpx_filter_block1d4_v4_avg_ssse3 vpx_filter_block1d4_v8_avg_ssse3 +#define vpx_filter_block1d4_h4_avg_ssse3 vpx_filter_block1d4_h8_avg_ssse3 + +// From vpx_dsp/x86/vpx_subpixel_bilinear_ssse3.asm +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; +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; + +// void vpx_convolve8_horiz_ssse3(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_ssse3(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_ssse3(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_ssse3(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, , ssse3, 0) +FUN_CONV_1D(vert, y0_q4, y_step_q4, v, src - src_stride * (num_taps / 2 - 1), , + ssse3, 0) +FUN_CONV_1D(avg_horiz, x0_q4, x_step_q4, h, src, avg_, ssse3, 1) +FUN_CONV_1D(avg_vert, y0_q4, y_step_q4, v, + src - src_stride * (num_taps / 2 - 1), avg_, ssse3, 1) + +static void filter_horiz_w8_ssse3(const uint8_t *const src, + const ptrdiff_t src_stride, + uint8_t *const dst, + const int16_t *const x_filter) { + __m128i s[8], ss[4], temp; + + load_8bit_8x8(src, src_stride, s); + // 00 01 10 11 20 21 30 31 40 41 50 51 60 61 70 71 + // 02 03 12 13 22 23 32 33 42 43 52 53 62 63 72 73 + // 04 05 14 15 24 25 34 35 44 45 54 55 64 65 74 75 + // 06 07 16 17 26 27 36 37 46 47 56 57 66 67 76 77 + transpose_16bit_4x8(s, ss); + temp = shuffle_filter_convolve8_8_ssse3(ss, x_filter); + // shrink to 8 bit each 16 bits + temp = _mm_packus_epi16(temp, temp); + // save only 8 bytes convolve result + _mm_storel_epi64((__m128i *)dst, temp); +} + +static void transpose8x8_to_dst(const uint8_t *const src, + const ptrdiff_t src_stride, uint8_t *const dst, + const ptrdiff_t dst_stride) { + __m128i s[8]; + + load_8bit_8x8(src, src_stride, s); + transpose_8bit_8x8(s, s); + store_8bit_8x8(s, dst, dst_stride); +} + +static void scaledconvolve_horiz_w8(const uint8_t *src, + const ptrdiff_t src_stride, uint8_t *dst, + const ptrdiff_t dst_stride, + const InterpKernel *const x_filters, + const int x0_q4, const int x_step_q4, + const int w, const int h) { + DECLARE_ALIGNED(16, uint8_t, temp[8 * 8]); + int x, y, z; + src -= SUBPEL_TAPS / 2 - 1; + + // This function processes 8x8 areas. The intermediate height is not always + // a multiple of 8, so force it to be a multiple of 8 here. + y = h + (8 - (h & 0x7)); + + do { + int x_q4 = x0_q4; + for (x = 0; x < w; x += 8) { + // process 8 src_x steps + for (z = 0; z < 8; ++z) { + const uint8_t *const src_x = &src[x_q4 >> SUBPEL_BITS]; + const int16_t *const x_filter = x_filters[x_q4 & SUBPEL_MASK]; + if (x_q4 & SUBPEL_MASK) { + filter_horiz_w8_ssse3(src_x, src_stride, temp + (z * 8), x_filter); + } else { + int i; + for (i = 0; i < 8; ++i) { + temp[z * 8 + i] = src_x[i * src_stride + 3]; + } + } + x_q4 += x_step_q4; + } + + // transpose the 8x8 filters values back to dst + transpose8x8_to_dst(temp, 8, dst + x, dst_stride); + } + + src += src_stride * 8; + dst += dst_stride * 8; + } while (y -= 8); +} + +static void filter_horiz_w4_ssse3(const uint8_t *const src, + const ptrdiff_t src_stride, + uint8_t *const dst, + const int16_t *const filter) { + __m128i s[4], ss[2]; + __m128i temp; + + load_8bit_8x4(src, src_stride, s); + transpose_16bit_4x4(s, ss); + // 00 01 10 11 20 21 30 31 + s[0] = ss[0]; + // 02 03 12 13 22 23 32 33 + s[1] = _mm_srli_si128(ss[0], 8); + // 04 05 14 15 24 25 34 35 + s[2] = ss[1]; + // 06 07 16 17 26 27 36 37 + s[3] = _mm_srli_si128(ss[1], 8); + + temp = shuffle_filter_convolve8_8_ssse3(s, filter); + // shrink to 8 bit each 16 bits + temp = _mm_packus_epi16(temp, temp); + // save only 4 bytes + *(int *)dst = _mm_cvtsi128_si32(temp); +} + +static void transpose4x4_to_dst(const uint8_t *const src, + const ptrdiff_t src_stride, uint8_t *const dst, + const ptrdiff_t dst_stride) { + __m128i s[4]; + + load_8bit_4x4(src, src_stride, s); + s[0] = transpose_8bit_4x4(s); + s[1] = _mm_srli_si128(s[0], 4); + s[2] = _mm_srli_si128(s[0], 8); + s[3] = _mm_srli_si128(s[0], 12); + store_8bit_4x4(s, dst, dst_stride); +} + +static void scaledconvolve_horiz_w4(const uint8_t *src, + const ptrdiff_t src_stride, uint8_t *dst, + const ptrdiff_t dst_stride, + const InterpKernel *const x_filters, + const int x0_q4, const int x_step_q4, + const int w, const int h) { + DECLARE_ALIGNED(16, uint8_t, temp[4 * 4]); + int x, y, z; + src -= SUBPEL_TAPS / 2 - 1; + + for (y = 0; y < h; y += 4) { + int x_q4 = x0_q4; + for (x = 0; x < w; x += 4) { + // process 4 src_x steps + for (z = 0; z < 4; ++z) { + const uint8_t *const src_x = &src[x_q4 >> SUBPEL_BITS]; + const int16_t *const x_filter = x_filters[x_q4 & SUBPEL_MASK]; + if (x_q4 & SUBPEL_MASK) { + filter_horiz_w4_ssse3(src_x, src_stride, temp + (z * 4), x_filter); + } else { + int i; + for (i = 0; i < 4; ++i) { + temp[z * 4 + i] = src_x[i * src_stride + 3]; + } + } + x_q4 += x_step_q4; + } + + // transpose the 4x4 filters values back to dst + transpose4x4_to_dst(temp, 4, dst + x, dst_stride); + } + + src += src_stride * 4; + dst += dst_stride * 4; + } +} + +static __m128i filter_vert_kernel(const __m128i *const s, + const int16_t *const filter) { + __m128i ss[4]; + __m128i temp; + + // 00 10 01 11 02 12 03 13 + ss[0] = _mm_unpacklo_epi8(s[0], s[1]); + // 20 30 21 31 22 32 23 33 + ss[1] = _mm_unpacklo_epi8(s[2], s[3]); + // 40 50 41 51 42 52 43 53 + ss[2] = _mm_unpacklo_epi8(s[4], s[5]); + // 60 70 61 71 62 72 63 73 + ss[3] = _mm_unpacklo_epi8(s[6], s[7]); + + temp = shuffle_filter_convolve8_8_ssse3(ss, filter); + // shrink to 8 bit each 16 bits + return _mm_packus_epi16(temp, temp); +} + +static void filter_vert_w4_ssse3(const uint8_t *const src, + const ptrdiff_t src_stride, uint8_t *const dst, + const int16_t *const filter) { + __m128i s[8]; + __m128i temp; + + load_8bit_4x8(src, src_stride, s); + temp = filter_vert_kernel(s, filter); + // save only 4 bytes + *(int *)dst = _mm_cvtsi128_si32(temp); +} + +static void scaledconvolve_vert_w4( + const uint8_t *src, const ptrdiff_t src_stride, uint8_t *const dst, + const ptrdiff_t dst_stride, const InterpKernel *const y_filters, + const int y0_q4, const int y_step_q4, const int w, const int h) { + int y; + int y_q4 = y0_q4; + + src -= src_stride * (SUBPEL_TAPS / 2 - 1); + for (y = 0; y < h; ++y) { + const unsigned char *src_y = &src[(y_q4 >> SUBPEL_BITS) * src_stride]; + const int16_t *const y_filter = y_filters[y_q4 & SUBPEL_MASK]; + + if (y_q4 & SUBPEL_MASK) { + filter_vert_w4_ssse3(src_y, src_stride, &dst[y * dst_stride], y_filter); + } else { + memcpy(&dst[y * dst_stride], &src_y[3 * src_stride], w); + } + + y_q4 += y_step_q4; + } +} + +static void filter_vert_w8_ssse3(const uint8_t *const src, + const ptrdiff_t src_stride, uint8_t *const dst, + const int16_t *const filter) { + __m128i s[8], temp; + + load_8bit_8x8(src, src_stride, s); + temp = filter_vert_kernel(s, filter); + // save only 8 bytes convolve result + _mm_storel_epi64((__m128i *)dst, temp); +} + +static void scaledconvolve_vert_w8( + const uint8_t *src, const ptrdiff_t src_stride, uint8_t *const dst, + const ptrdiff_t dst_stride, const InterpKernel *const y_filters, + const int y0_q4, const int y_step_q4, const int w, const int h) { + int y; + int y_q4 = y0_q4; + + src -= src_stride * (SUBPEL_TAPS / 2 - 1); + for (y = 0; y < h; ++y) { + const unsigned char *src_y = &src[(y_q4 >> SUBPEL_BITS) * src_stride]; + const int16_t *const y_filter = y_filters[y_q4 & SUBPEL_MASK]; + if (y_q4 & SUBPEL_MASK) { + filter_vert_w8_ssse3(src_y, src_stride, &dst[y * dst_stride], y_filter); + } else { + memcpy(&dst[y * dst_stride], &src_y[3 * src_stride], w); + } + y_q4 += y_step_q4; + } +} + +static void filter_vert_w16_ssse3(const uint8_t *src, + const ptrdiff_t src_stride, + uint8_t *const dst, + const int16_t *const filter, const int w) { + int i; + __m128i f[4]; + shuffle_filter_ssse3(filter, f); + + for (i = 0; i < w; i += 16) { + __m128i s[8], s_lo[4], s_hi[4], temp_lo, temp_hi; + + loadu_8bit_16x8(src, src_stride, s); + + // merge the result together + s_lo[0] = _mm_unpacklo_epi8(s[0], s[1]); + s_hi[0] = _mm_unpackhi_epi8(s[0], s[1]); + s_lo[1] = _mm_unpacklo_epi8(s[2], s[3]); + s_hi[1] = _mm_unpackhi_epi8(s[2], s[3]); + s_lo[2] = _mm_unpacklo_epi8(s[4], s[5]); + s_hi[2] = _mm_unpackhi_epi8(s[4], s[5]); + s_lo[3] = _mm_unpacklo_epi8(s[6], s[7]); + s_hi[3] = _mm_unpackhi_epi8(s[6], s[7]); + temp_lo = convolve8_8_ssse3(s_lo, f); + temp_hi = convolve8_8_ssse3(s_hi, f); + + // shrink to 8 bit each 16 bits, the first lane contain the first convolve + // result and the second lane contain the second convolve result + temp_hi = _mm_packus_epi16(temp_lo, temp_hi); + src += 16; + // save 16 bytes convolve result + _mm_store_si128((__m128i *)&dst[i], temp_hi); + } +} + +static void scaledconvolve_vert_w16( + const uint8_t *src, const ptrdiff_t src_stride, uint8_t *const dst, + const ptrdiff_t dst_stride, const InterpKernel *const y_filters, + const int y0_q4, const int y_step_q4, const int w, const int h) { + int y; + int y_q4 = y0_q4; + + src -= src_stride * (SUBPEL_TAPS / 2 - 1); + for (y = 0; y < h; ++y) { + const unsigned char *src_y = &src[(y_q4 >> SUBPEL_BITS) * src_stride]; + const int16_t *const y_filter = y_filters[y_q4 & SUBPEL_MASK]; + if (y_q4 & SUBPEL_MASK) { + filter_vert_w16_ssse3(src_y, src_stride, &dst[y * dst_stride], y_filter, + w); + } else { + memcpy(&dst[y * dst_stride], &src_y[3 * src_stride], w); + } + y_q4 += y_step_q4; + } +} + +void vpx_scaled_2d_ssse3(const uint8_t *src, ptrdiff_t src_stride, uint8_t *dst, + ptrdiff_t dst_stride, const InterpKernel *filter, + int x0_q4, int x_step_q4, int y0_q4, int y_step_q4, + int w, int h) { + // Note: Fixed size intermediate buffer, temp, places limits on parameters. + // 2d filtering proceeds in 2 steps: + // (1) Interpolate horizontally into an intermediate buffer, temp. + // (2) Interpolate temp vertically to derive the sub-pixel result. + // Deriving the maximum number of rows in the temp buffer (135): + // --Smallest scaling factor is x1/2 ==> y_step_q4 = 32 (Normative). + // --Largest block size is 64x64 pixels. + // --64 rows in the downscaled frame span a distance of (64 - 1) * 32 in the + // original frame (in 1/16th pixel units). + // --Must round-up because block may be located at sub-pixel position. + // --Require an additional SUBPEL_TAPS rows for the 8-tap filter tails. + // --((64 - 1) * 32 + 15) >> 4 + 8 = 135. + // --Require an additional 8 rows for the horiz_w8 transpose tail. + // When calling in frame scaling function, the smallest scaling factor is x1/4 + // ==> y_step_q4 = 64. Since w and h are at most 16, the temp buffer is still + // big enough. + DECLARE_ALIGNED(16, uint8_t, temp[(135 + 8) * 64]); + const int intermediate_height = + (((h - 1) * y_step_q4 + y0_q4) >> SUBPEL_BITS) + SUBPEL_TAPS; + + assert(w <= 64); + assert(h <= 64); + assert(y_step_q4 <= 32 || (y_step_q4 <= 64 && h <= 32)); + assert(x_step_q4 <= 64); + + if (w >= 8) { + scaledconvolve_horiz_w8(src - src_stride * (SUBPEL_TAPS / 2 - 1), + src_stride, temp, 64, filter, x0_q4, x_step_q4, w, + intermediate_height); + } else { + scaledconvolve_horiz_w4(src - src_stride * (SUBPEL_TAPS / 2 - 1), + src_stride, temp, 64, filter, x0_q4, x_step_q4, w, + intermediate_height); + } + + if (w >= 16) { + scaledconvolve_vert_w16(temp + 64 * (SUBPEL_TAPS / 2 - 1), 64, dst, + dst_stride, filter, y0_q4, y_step_q4, w, h); + } else if (w == 8) { + scaledconvolve_vert_w8(temp + 64 * (SUBPEL_TAPS / 2 - 1), 64, dst, + dst_stride, filter, y0_q4, y_step_q4, w, h); + } else { + scaledconvolve_vert_w4(temp + 64 * (SUBPEL_TAPS / 2 - 1), 64, dst, + dst_stride, filter, y0_q4, y_step_q4, w, h); + } +} + +// void vpx_convolve8_ssse3(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_ssse3(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(, ssse3, 0) +FUN_CONV_2D(avg_, ssse3, 1) |