rescaler_sse2.c | Explore in Territory

// Copyright 2015 Google Inc. All Rights Reserved.
//
// Use of this source code is governed by a BSD-style license
// that can be found in the COPYING 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.
// -----------------------------------------------------------------------------
//
// SSE2 Rescaling functions
//
// Author: Skal ([email protected])

#include "src/dsp/dsp.h"

#if defined(WEBP_USE_SSE2) && !defined(WEBP_REDUCE_SIZE)
#include <emmintrin.h>

#include <assert.h>
#include "src/utils/rescaler_utils.h"
#include "src/utils/utils.h"

//------------------------------------------------------------------------------
// Implementations of critical functions ImportRow / ExportRow

#define ROUNDER …
#define MULT_FIX …
#define MULT_FIX_FLOOR …

// input: 8 bytes ABCDEFGH -> output: A0E0B0F0C0G0D0H0
static void LoadTwoPixels_SSE2(const uint8_t* const src, __m128i* out) { … }

// input: 8 bytes ABCDEFGH -> output: A0B0C0D0E0F0G0H0
static void LoadEightPixels_SSE2(const uint8_t* const src, __m128i* out) { … }

static void RescalerImportRowExpand_SSE2(WebPRescaler* const wrk,
                                         const uint8_t* src) { … }

static void RescalerImportRowShrink_SSE2(WebPRescaler* const wrk,
                                         const uint8_t* src) { … }

//------------------------------------------------------------------------------
// Row export

// load *src as epi64, multiply by mult and store result in [out0 ... out3]
static WEBP_INLINE void LoadDispatchAndMult_SSE2(const rescaler_t* const src,
                                                 const __m128i* const mult,
                                                 __m128i* const out0,
                                                 __m128i* const out1,
                                                 __m128i* const out2,
                                                 __m128i* const out3) { … }

static WEBP_INLINE void ProcessRow_SSE2(const __m128i* const A0,
                                        const __m128i* const A1,
                                        const __m128i* const A2,
                                        const __m128i* const A3,
                                        const __m128i* const mult,
                                        uint8_t* const dst) { … }

static void RescalerExportRowExpand_SSE2(WebPRescaler* const wrk) { … }

static void RescalerExportRowShrink_SSE2(WebPRescaler* const wrk) { … }

#undef MULT_FIX_FLOOR
#undef MULT_FIX
#undef ROUNDER

//------------------------------------------------------------------------------

extern void WebPRescalerDspInitSSE2(void);

WEBP_TSAN_IGNORE_FUNCTION void WebPRescalerDspInitSSE2(void) { … }

#else  // !WEBP_USE_SSE2

WEBP_DSP_INIT_STUB(WebPRescalerDspInitSSE2)

#endif  // WEBP_USE_SSE2
godot/thirdparty/libwebp/src/dsp/rescaler_sse2.c
