55414bc573
Note that there are two Godot-specific changes made to libwebp
for the javascript/HTML5 platform. They are documented in the
README.md.
(cherry picked from commit ee3cf211c6)
109 lines
3.8 KiB
C++
109 lines
3.8 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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// SSE2 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_SSE2_H_
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#define WEBP_DSP_COMMON_SSE2_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_SSE2)
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#include <emmintrin.h>
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//------------------------------------------------------------------------------
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// Quite useful macro for debugging. Left here for convenience.
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#if 0
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#include <stdio.h>
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static WEBP_INLINE void PrintReg(const __m128i r, const char* const name,
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int size) {
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int n;
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union {
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__m128i r;
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uint8_t i8[16];
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uint16_t i16[8];
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uint32_t i32[4];
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uint64_t i64[2];
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} tmp;
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tmp.r = r;
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fprintf(stderr, "%s\t: ", name);
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if (size == 8) {
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for (n = 0; n < 16; ++n) fprintf(stderr, "%.2x ", tmp.i8[n]);
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} else if (size == 16) {
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for (n = 0; n < 8; ++n) fprintf(stderr, "%.4x ", tmp.i16[n]);
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} else if (size == 32) {
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for (n = 0; n < 4; ++n) fprintf(stderr, "%.8x ", tmp.i32[n]);
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} else {
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for (n = 0; n < 2; ++n) fprintf(stderr, "%.16lx ", tmp.i64[n]);
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}
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fprintf(stderr, "\n");
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}
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#endif
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//------------------------------------------------------------------------------
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// Math functions.
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// Return the sum of all the 8b in the register.
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static WEBP_INLINE int VP8HorizontalAdd8b(const __m128i* const a) {
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const __m128i zero = _mm_setzero_si128();
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const __m128i sad8x2 = _mm_sad_epu8(*a, zero);
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// sum the two sads: sad8x2[0:1] + sad8x2[8:9]
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const __m128i sum = _mm_add_epi32(sad8x2, _mm_shuffle_epi32(sad8x2, 2));
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return _mm_cvtsi128_si32(sum);
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}
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// Transpose two 4x4 16b matrices horizontally stored in registers.
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static WEBP_INLINE void VP8Transpose_2_4x4_16b(
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const __m128i* const in0, const __m128i* const in1,
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const __m128i* const in2, const __m128i* const in3, __m128i* const out0,
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__m128i* const out1, __m128i* const out2, __m128i* const out3) {
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// Transpose the two 4x4.
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// a00 a01 a02 a03 b00 b01 b02 b03
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// a10 a11 a12 a13 b10 b11 b12 b13
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// a20 a21 a22 a23 b20 b21 b22 b23
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// a30 a31 a32 a33 b30 b31 b32 b33
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const __m128i transpose0_0 = _mm_unpacklo_epi16(*in0, *in1);
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const __m128i transpose0_1 = _mm_unpacklo_epi16(*in2, *in3);
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const __m128i transpose0_2 = _mm_unpackhi_epi16(*in0, *in1);
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const __m128i transpose0_3 = _mm_unpackhi_epi16(*in2, *in3);
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// a00 a10 a01 a11 a02 a12 a03 a13
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// a20 a30 a21 a31 a22 a32 a23 a33
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// b00 b10 b01 b11 b02 b12 b03 b13
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// b20 b30 b21 b31 b22 b32 b23 b33
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const __m128i transpose1_0 = _mm_unpacklo_epi32(transpose0_0, transpose0_1);
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const __m128i transpose1_1 = _mm_unpacklo_epi32(transpose0_2, transpose0_3);
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const __m128i transpose1_2 = _mm_unpackhi_epi32(transpose0_0, transpose0_1);
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const __m128i transpose1_3 = _mm_unpackhi_epi32(transpose0_2, transpose0_3);
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// a00 a10 a20 a30 a01 a11 a21 a31
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// b00 b10 b20 b30 b01 b11 b21 b31
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// a02 a12 a22 a32 a03 a13 a23 a33
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// b02 b12 a22 b32 b03 b13 b23 b33
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*out0 = _mm_unpacklo_epi64(transpose1_0, transpose1_1);
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*out1 = _mm_unpackhi_epi64(transpose1_0, transpose1_1);
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*out2 = _mm_unpacklo_epi64(transpose1_2, transpose1_3);
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*out3 = _mm_unpackhi_epi64(transpose1_2, transpose1_3);
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// a00 a10 a20 a30 b00 b10 b20 b30
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// a01 a11 a21 a31 b01 b11 b21 b31
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// a02 a12 a22 a32 b02 b12 b22 b32
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// a03 a13 a23 a33 b03 b13 b23 b33
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}
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#endif // WEBP_USE_SSE2
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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_SSE2_H_
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