kc3-lang/angle/src/libGLESv2/TextureSSE2.cpp

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• Author : daniel@transgaming.com
  Date : 2012-11-28 19:34:30
  Hash : 31b13e1f
  Message : Moves Image & Renderer into rx namespace TRAC #22002 Signed-off-by: Daniel Koch Author: Shannon Woods git-svn-id: https://angleproject.googlecode.com/svn/branches/dx11proto@1414 736b8ea6-26fd-11df-bfd4-992fa37f6226

• src/libGLESv2/TextureSSE2.cpp

• //
  // Copyright (c) 2002-2010 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.
  //
  
  // TextureSSE2.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 <intrin.h>
  
  namespace rx
  {
  
  void Image::loadRGBAUByteDataSSE2(GLsizei width, GLsizei height,
                                    int inputPitch, const void *input, size_t outputPitch, void *output) const
  {
      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::loadAlphaDataSSE2(GLsizei width, GLsizei height,
                                int inputPitch, const void *input, size_t outputPitch, void *output) const
  {
      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;
          }
      }
  }
  
  }