src/gallium/drivers/swr/rasterizer/core/state_funcs.h

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  23 * @file state.h
  24 *
  25 * @brief Definitions for API state - complex function implementation.
  26 *
  27 ******************************************************************************/
  28 #pragma once
  29
  30 #include "core/state.h"
  31 #include "common/simdintrin.h"
  32
  33
  34 template <typename MaskT>
  35 INLINE __m128i SWR_MULTISAMPLE_POS::expandThenBlend4(uint32_t* min, uint32_t* max)
  36 {
  37     __m128i vMin = _mm_set1_epi32(*min);
  38     __m128i vMax = _mm_set1_epi32(*max);
  39     return _simd_blend4_epi32<MaskT::value>(vMin, vMax);
  40 }
  41
  42 INLINE void SWR_MULTISAMPLE_POS::PrecalcSampleData(int numSamples)
  43 {
  44     for(int i = 0; i < numSamples; i++)
  45     {
  46         _vXi[i] = _mm_set1_epi32(_xi[i]);
  47         _vYi[i] = _mm_set1_epi32(_yi[i]);
  48         _vX[i] = _simd_set1_ps(_x[i]);
  49         _vY[i] = _simd_set1_ps(_y[i]);
  50     }
  51     // precalculate the raster tile BB for the rasterizer.
  52     CalcTileSampleOffsets(numSamples);
  53 }
  54
  55 INLINE void SWR_MULTISAMPLE_POS::CalcTileSampleOffsets(int numSamples)
  56 {
  57     auto minXi = std::min_element(std::begin(_xi), &_xi[numSamples]);
  58     auto maxXi = std::max_element(std::begin(_xi), &_xi[numSamples]);
  59     using xMask = std::integral_constant<int, 0xA>;
  60     // BR(max),    BL(min),    UR(max),    UL(min)
  61     tileSampleOffsetsX = expandThenBlend4<xMask>(minXi, maxXi);
  62
  63     auto minYi = std::min_element(std::begin(_yi), &_yi[numSamples]);
  64     auto maxYi = std::max_element(std::begin(_yi), &_yi[numSamples]);
  65     using yMask = std::integral_constant<int, 0xC>;
  66     // BR(max),    BL(min),    UR(max),    UL(min)
  67     tileSampleOffsetsY = expandThenBlend4<yMask>(minYi, maxYi);
  68 };