49 lines
1.9 KiB
C
49 lines
1.9 KiB
C
/*
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* Copyright (c) 2017 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef VPX_DSP_X86_CONVOLVE_SSSE3_H_
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#define VPX_DSP_X86_CONVOLVE_SSSE3_H_
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#include <tmmintrin.h> // SSSE3
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#include "./vpx_config.h"
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static INLINE void shuffle_filter_ssse3(const int16_t *const filter,
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__m128i *const f) {
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const __m128i f_values = _mm_load_si128((const __m128i *)filter);
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// pack and duplicate the filter values
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f[0] = _mm_shuffle_epi8(f_values, _mm_set1_epi16(0x0200u));
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f[1] = _mm_shuffle_epi8(f_values, _mm_set1_epi16(0x0604u));
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f[2] = _mm_shuffle_epi8(f_values, _mm_set1_epi16(0x0a08u));
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f[3] = _mm_shuffle_epi8(f_values, _mm_set1_epi16(0x0e0cu));
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}
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static INLINE __m128i convolve8_8_ssse3(const __m128i *const s,
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const __m128i *const f) {
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// multiply 2 adjacent elements with the filter and add the result
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const __m128i k_64 = _mm_set1_epi16(1 << 6);
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const __m128i x0 = _mm_maddubs_epi16(s[0], f[0]);
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const __m128i x1 = _mm_maddubs_epi16(s[1], f[1]);
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const __m128i x2 = _mm_maddubs_epi16(s[2], f[2]);
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const __m128i x3 = _mm_maddubs_epi16(s[3], f[3]);
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// add and saturate the results together
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const __m128i min_x2x1 = _mm_min_epi16(x2, x1);
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const __m128i max_x2x1 = _mm_max_epi16(x2, x1);
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__m128i temp = _mm_adds_epi16(x0, x3);
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temp = _mm_adds_epi16(temp, min_x2x1);
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temp = _mm_adds_epi16(temp, max_x2x1);
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// round and shift by 7 bit each 16 bit
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temp = _mm_adds_epi16(temp, k_64);
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temp = _mm_srai_epi16(temp, 7);
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return temp;
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}
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#endif // VPX_DSP_X86_CONVOLVE_SSSE3_H_
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