51 lines
2.1 KiB
C
51 lines
2.1 KiB
C
|
/*
|
||
|
|
* Copyright (c) 2021, 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.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef AOM_AOM_DSP_X86_CONVOLVE_SSSE3_H_
|
||
|
|
#define AOM_AOM_DSP_X86_CONVOLVE_SSSE3_H_
|
||
|
|
|
||
|
|
#include <tmmintrin.h> // SSSE3
|
||
|
|
|
||
|
|
static INLINE void shuffle_filter_ssse3(const int16_t *const filter,
|
||
|
|
__m128i *const f) {
|
||
|
|
const __m128i f_values = _mm_load_si128((const __m128i *)filter);
|
||
|
|
// pack and duplicate the filter values
|
||
|
|
f[0] = _mm_shuffle_epi8(f_values, _mm_set1_epi16(0x0200u));
|
||
|
|
f[1] = _mm_shuffle_epi8(f_values, _mm_set1_epi16(0x0604u));
|
||
|
|
f[2] = _mm_shuffle_epi8(f_values, _mm_set1_epi16(0x0a08u));
|
||
|
|
f[3] = _mm_shuffle_epi8(f_values, _mm_set1_epi16(0x0e0cu));
|
||
|
|
}
|
||
|
|
|
||
|
|
static INLINE __m128i convolve8_8_ssse3(const __m128i *const s,
|
||
|
|
const __m128i *const f) {
|
||
|
|
// multiply 2 adjacent elements with the filter and add the result
|
||
|
|
const __m128i k_64 = _mm_set1_epi16(1 << 6);
|
||
|
|
const __m128i x0 = _mm_maddubs_epi16(s[0], f[0]);
|
||
|
|
const __m128i x1 = _mm_maddubs_epi16(s[1], f[1]);
|
||
|
|
const __m128i x2 = _mm_maddubs_epi16(s[2], f[2]);
|
||
|
|
const __m128i x3 = _mm_maddubs_epi16(s[3], f[3]);
|
||
|
|
__m128i sum1, sum2;
|
||
|
|
|
||
|
|
// sum the results together, saturating only on the final step
|
||
|
|
// adding x0 with x2 and x1 with x3 is the only order that prevents
|
||
|
|
// outranges for all filters
|
||
|
|
sum1 = _mm_add_epi16(x0, x2);
|
||
|
|
sum2 = _mm_add_epi16(x1, x3);
|
||
|
|
// add the rounding offset early to avoid another saturated add
|
||
|
|
sum1 = _mm_add_epi16(sum1, k_64);
|
||
|
|
sum1 = _mm_adds_epi16(sum1, sum2);
|
||
|
|
// shift by 7 bit each 16 bit
|
||
|
|
sum1 = _mm_srai_epi16(sum1, 7);
|
||
|
|
return sum1;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif // AOM_AOM_DSP_X86_CONVOLVE_SSSE3_H_
|