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#include "precompiled.h"
//
// Copyright (c) 2002-2012 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// ImageSSE2.cpp: Implements SSE2-based functions of rx::Image class. It's
// in a separated file for GCC, which can enable SSE usage only per-file,
// not for code blocks that use SSE2 explicitly.
#include "libGLESv2/Texture.h"
#include "libGLESv2/renderer/Image.h"
namespace rx
{
void Image::loadRGBAUByteDataToBGRASSE2(GLsizei width, GLsizei height,
int inputPitch, const void *input, size_t outputPitch, void *output)
{
const unsigned int *source = NULL;
unsigned int *dest = NULL;
__m128i brMask = _mm_set1_epi32(0x00ff00ff);
for (int y = 0; y < height; y++)
{
source = reinterpret_cast<const unsigned int*>(static_cast<const unsigned char*>(input) + y * inputPitch);
dest = reinterpret_cast<unsigned int*>(static_cast<unsigned char*>(output) + y * outputPitch);
int x = 0;
// Make output writes aligned
for (x = 0; ((reinterpret_cast<intptr_t>(&dest[x]) & 15) != 0) && x < width; x++)
{
unsigned int rgba = source[x];
dest[x] = (_rotl(rgba, 16) & 0x00ff00ff) | (rgba & 0xff00ff00);
}
for (; x + 3 < width; x += 4)
{
__m128i sourceData = _mm_loadu_si128(reinterpret_cast<const __m128i*>(&source[x]));
// Mask out g and a, which don't change
__m128i gaComponents = _mm_andnot_si128(brMask, sourceData);
// Mask out b and r
__m128i brComponents = _mm_and_si128(sourceData, brMask);
// Swap b and r
__m128i brSwapped = _mm_shufflehi_epi16(_mm_shufflelo_epi16(brComponents, _MM_SHUFFLE(2, 3, 0, 1)), _MM_SHUFFLE(2, 3, 0, 1));
__m128i result = _mm_or_si128(gaComponents, brSwapped);
_mm_store_si128(reinterpret_cast<__m128i*>(&dest[x]), result);
}
// Perform leftover writes
for (; x < width; x++)
{
unsigned int rgba = source[x];
dest[x] = (_rotl(rgba, 16) & 0x00ff00ff) | (rgba & 0xff00ff00);
}
}
}
void Image::loadAlphaDataToBGRASSE2(GLsizei width, GLsizei height,
int inputPitch, const void *input, size_t outputPitch, void *output)
{
const unsigned char *source = NULL;
unsigned int *dest = NULL;
__m128i zeroWide = _mm_setzero_si128();
for (int y = 0; y < height; y++)
{
source = static_cast<const unsigned char*>(input) + y * inputPitch;
dest = reinterpret_cast<unsigned int*>(static_cast<unsigned char*>(output) + y * outputPitch);
int x;
// Make output writes aligned
for (x = 0; ((reinterpret_cast<intptr_t>(&dest[x]) & 0xF) != 0 && x < width); x++)
{
dest[x] = static_cast<unsigned int>(source[x]) << 24;
}
for (; x + 7 < width; x += 8)
{
__m128i sourceData = _mm_loadl_epi64(reinterpret_cast<const __m128i*>(&source[x]));
// Interleave each byte to 16bit, make the lower byte to zero
sourceData = _mm_unpacklo_epi8(zeroWide, sourceData);
// Interleave each 16bit to 32bit, make the lower 16bit to zero
__m128i lo = _mm_unpacklo_epi16(zeroWide, sourceData);
__m128i hi = _mm_unpackhi_epi16(zeroWide, sourceData);
_mm_store_si128(reinterpret_cast<__m128i*>(&dest[x]), lo);
_mm_store_si128(reinterpret_cast<__m128i*>(&dest[x + 4]), hi);
}
// Handle the remainder
for (; x < width; x++)
{
dest[x] = static_cast<unsigned int>(source[x]) << 24;
}
}
}
}
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