mirror of
https://github.com/webmproject/libwebp.git
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133 lines
4.5 KiB
C
133 lines
4.5 KiB
C
// Copyright 2016 Google Inc. 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 COPYING 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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//
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// SSE4 code common to several files.
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//
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// Author: Vincent Rabaud (vrabaud@google.com)
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#ifndef WEBP_DSP_COMMON_SSE41_H_
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#define WEBP_DSP_COMMON_SSE41_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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#if defined(WEBP_USE_SSE41)
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#include <smmintrin.h>
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//------------------------------------------------------------------------------
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// Channel mixing.
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// Shuffles the input buffer as A0 0 0 A1 0 0 A2 ...
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#define WEBP_SSE41_SHUFF(OUT, IN0, IN1) \
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OUT##0 = _mm_shuffle_epi8(*IN0, shuff0); \
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OUT##1 = _mm_shuffle_epi8(*IN0, shuff1); \
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OUT##2 = _mm_shuffle_epi8(*IN0, shuff2); \
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OUT##3 = _mm_shuffle_epi8(*IN1, shuff0); \
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OUT##4 = _mm_shuffle_epi8(*IN1, shuff1); \
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OUT##5 = _mm_shuffle_epi8(*IN1, shuff2);
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// Pack the planar buffers
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// rrrr... rrrr... gggg... gggg... bbbb... bbbb....
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// triplet by triplet in the output buffer rgb as rgbrgbrgbrgb ...
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static WEBP_INLINE void VP8PlanarTo24b_SSE41(
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__m128i* const in0, __m128i* const in1, __m128i* const in2,
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__m128i* const in3, __m128i* const in4, __m128i* const in5) {
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__m128i R0, R1, R2, R3, R4, R5;
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__m128i G0, G1, G2, G3, G4, G5;
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__m128i B0, B1, B2, B3, B4, B5;
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// Process R.
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{
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const __m128i shuff0 = _mm_set_epi8(
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5, -1, -1, 4, -1, -1, 3, -1, -1, 2, -1, -1, 1, -1, -1, 0);
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const __m128i shuff1 = _mm_set_epi8(
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-1, 10, -1, -1, 9, -1, -1, 8, -1, -1, 7, -1, -1, 6, -1, -1);
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const __m128i shuff2 = _mm_set_epi8(
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-1, -1, 15, -1, -1, 14, -1, -1, 13, -1, -1, 12, -1, -1, 11, -1);
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WEBP_SSE41_SHUFF(R, in0, in1)
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}
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// Process G.
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{
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// Same as before, just shifted to the left by one and including the right
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// padding.
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const __m128i shuff0 = _mm_set_epi8(
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-1, -1, 4, -1, -1, 3, -1, -1, 2, -1, -1, 1, -1, -1, 0, -1);
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const __m128i shuff1 = _mm_set_epi8(
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10, -1, -1, 9, -1, -1, 8, -1, -1, 7, -1, -1, 6, -1, -1, 5);
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const __m128i shuff2 = _mm_set_epi8(
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-1, 15, -1, -1, 14, -1, -1, 13, -1, -1, 12, -1, -1, 11, -1, -1);
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WEBP_SSE41_SHUFF(G, in2, in3)
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}
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// Process B.
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{
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const __m128i shuff0 = _mm_set_epi8(
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-1, 4, -1, -1, 3, -1, -1, 2, -1, -1, 1, -1, -1, 0, -1, -1);
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const __m128i shuff1 = _mm_set_epi8(
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-1, -1, 9, -1, -1, 8, -1, -1, 7, -1, -1, 6, -1, -1, 5, -1);
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const __m128i shuff2 = _mm_set_epi8(
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15, -1, -1, 14, -1, -1, 13, -1, -1, 12, -1, -1, 11, -1, -1, 10);
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WEBP_SSE41_SHUFF(B, in4, in5)
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}
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// OR the different channels.
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{
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const __m128i RG0 = _mm_or_si128(R0, G0);
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const __m128i RG1 = _mm_or_si128(R1, G1);
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const __m128i RG2 = _mm_or_si128(R2, G2);
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const __m128i RG3 = _mm_or_si128(R3, G3);
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const __m128i RG4 = _mm_or_si128(R4, G4);
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const __m128i RG5 = _mm_or_si128(R5, G5);
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*in0 = _mm_or_si128(RG0, B0);
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*in1 = _mm_or_si128(RG1, B1);
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*in2 = _mm_or_si128(RG2, B2);
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*in3 = _mm_or_si128(RG3, B3);
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*in4 = _mm_or_si128(RG4, B4);
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*in5 = _mm_or_si128(RG5, B5);
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}
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}
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#undef WEBP_SSE41_SHUFF
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// Convert four packed four-channel buffers like argbargbargbargb... into the
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// split channels aaaaa ... rrrr ... gggg .... bbbbb ......
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static WEBP_INLINE void VP8L32bToPlanar_SSE41(__m128i* const in0,
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__m128i* const in1,
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__m128i* const in2,
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__m128i* const in3) {
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// aaaarrrrggggbbbb
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const __m128i shuff0 =
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_mm_set_epi8(15, 11, 7, 3, 14, 10, 6, 2, 13, 9, 5, 1, 12, 8, 4, 0);
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const __m128i A0 = _mm_shuffle_epi8(*in0, shuff0);
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const __m128i A1 = _mm_shuffle_epi8(*in1, shuff0);
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const __m128i A2 = _mm_shuffle_epi8(*in2, shuff0);
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const __m128i A3 = _mm_shuffle_epi8(*in3, shuff0);
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// A0A1R0R1
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// G0G1B0B1
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// A2A3R2R3
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// G0G1B0B1
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const __m128i B0 = _mm_unpacklo_epi32(A0, A1);
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const __m128i B1 = _mm_unpackhi_epi32(A0, A1);
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const __m128i B2 = _mm_unpacklo_epi32(A2, A3);
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const __m128i B3 = _mm_unpackhi_epi32(A2, A3);
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*in3 = _mm_unpacklo_epi64(B0, B2);
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*in2 = _mm_unpackhi_epi64(B0, B2);
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*in1 = _mm_unpacklo_epi64(B1, B3);
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*in0 = _mm_unpackhi_epi64(B1, B3);
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}
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#endif // WEBP_USE_SSE41
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif // WEBP_DSP_COMMON_SSE41_H_
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