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

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  23 * @file frontend.h
  24 *
  25 * @brief Definitions for Frontend which handles vertex processing,
  26 *        primitive assembly, clipping, binning, etc.
  27 *
  28 ******************************************************************************/
  29 #pragma once
  30 #include "context.h"
  31
  32 INLINE
  33 __m128i fpToFixedPoint(const __m128 vIn)
  34 {
  35     __m128 vFixed = _mm_mul_ps(vIn, _mm_set1_ps(FIXED_POINT_SCALE));
  36     return _mm_cvtps_epi32(vFixed);
  37 }
  38
  39 INLINE
  40 simdscalari fpToFixedPointVertical(const simdscalar vIn)
  41 {
  42     simdscalar vFixed = _simd_mul_ps(vIn, _simd_set1_ps(FIXED_POINT_SCALE));
  43     return _simd_cvtps_epi32(vFixed);
  44 }
  45
  46
  47 // Calculates the A and B coefficients for the 3 edges of the triangle
  48 //
  49 // maths for edge equations:
  50 //   standard form of a line in 2d
  51 //   Ax + By + C = 0
  52 //   A = y0 - y1
  53 //   B = x1 - x0
  54 //   C = x0y1 - x1y0
  55 INLINE
  56 void triangleSetupAB(const __m128 vX, const __m128 vY, __m128 & vA, __m128 & vB)
  57 {
  58     // vYsub = y1 y2 y0 dc
  59     __m128 vYsub = _mm_shuffle_ps(vY, vY, _MM_SHUFFLE(3, 0, 2, 1));
  60     // vY =    y0 y1 y2 dc
  61     vA = _mm_sub_ps(vY, vYsub);
  62
  63     // Result:
  64     // A[0] = y0 - y1
  65     // A[1] = y1 - y2
  66     // A[2] = y2 - y0
  67
  68     // vXsub = x1 x2 x0 dc
  69     __m128 vXsub = _mm_shuffle_ps(vX, vX, _MM_SHUFFLE(3, 0, 2, 1));
  70     // vX =    x0 x1 x2 dc
  71     vB = _mm_sub_ps(vXsub, vX);
  72
  73     // Result:
  74     // B[0] = x1 - x0
  75     // B[1] = x2 - x1
  76     // B[2] = x0 - x2
  77 }
  78
  79 INLINE
  80 void triangleSetupABVertical(const simdscalar vX[3], const simdscalar vY[3], simdscalar (&vA)[3], simdscalar (&vB)[3])
  81 {
  82     // generate edge equations
  83     // A = y0 - y1
  84     // B = x1 - x0
  85     vA[0] = _simd_sub_ps(vY[0], vY[1]);
  86     vA[1] = _simd_sub_ps(vY[1], vY[2]);
  87     vA[2] = _simd_sub_ps(vY[2], vY[0]);
  88
  89     vB[0] = _simd_sub_ps(vX[1], vX[0]);
  90     vB[1] = _simd_sub_ps(vX[2], vX[1]);
  91     vB[2] = _simd_sub_ps(vX[0], vX[2]);
  92 }
  93
  94 INLINE
  95 void triangleSetupABInt(const __m128i vX, const __m128i vY, __m128i & vA, __m128i & vB)
  96 {
  97     // generate edge equations
  98     // A = y0 - y1
  99     // B = x1 - x0
 100     // C = x0y1 - x1y0
 101     __m128i vYsub = _mm_shuffle_epi32(vY, _MM_SHUFFLE(3, 0, 2, 1));
 102     vA = _mm_sub_epi32(vY, vYsub);
 103
 104     __m128i vXsub = _mm_shuffle_epi32(vX, _MM_SHUFFLE(3, 0, 2, 1));
 105     vB = _mm_sub_epi32(vXsub, vX);
 106 }
 107
 108 INLINE
 109 void triangleSetupABIntVertical(const simdscalari vX[3], const simdscalari vY[3], simdscalari (&vA)[3], simdscalari (&vB)[3])
 110 {
 111     // A = y0 - y1
 112     // B = x1 - x0
 113     vA[0] = _simd_sub_epi32(vY[0], vY[1]);
 114     vA[1] = _simd_sub_epi32(vY[1], vY[2]);
 115     vA[2] = _simd_sub_epi32(vY[2], vY[0]);
 116
 117     vB[0] = _simd_sub_epi32(vX[1], vX[0]);
 118     vB[1] = _simd_sub_epi32(vX[2], vX[1]);
 119     vB[2] = _simd_sub_epi32(vX[0], vX[2]);
 120 }
 121 // Calculate the determinant of the triangle
 122 // 2 vectors between the 3 points: P, Q
 123 // Px = x0-x2, Py = y0-y2
 124 // Qx = x1-x2, Qy = y1-y2
 125 //       |Px Qx|
 126 // det = |     | = PxQy - PyQx
 127 //       |Py Qy|
 128 // simplifies to : (x0-x2)*(y1-y2) - (y0-y2)*(x1-x2)
 129 //               try to reuse our A & B coef's already calculated. factor out a -1 from Py and Qx
 130 //               : B[2]*A[1] - (-(y2-y0))*(-(x2-x1))
 131 //               : B[2]*A[1] - (-1)(-1)(y2-y0)*(x2-x1)
 132 //               : B[2]*A[1] - A[2]*B[1]
 133 INLINE
 134 float calcDeterminantInt(const __m128i vA, const __m128i vB)
 135 {
 136     // vAShuf = [A1, A0, A2, A0]
 137     __m128i vAShuf = _mm_shuffle_epi32(vA, _MM_SHUFFLE(0, 2, 0, 1));
 138     // vBShuf = [B2, B0, B1, B0]
 139     __m128i vBShuf = _mm_shuffle_epi32(vB, _MM_SHUFFLE(0, 1, 0, 2));
 140     // vMul = [A1*B2, B1*A2]
 141     __m128i vMul   = _mm_mul_epi32(vAShuf, vBShuf);
 142
 143     // shuffle upper to lower
 144     // vMul2 = [B1*A2, B1*A2]
 145     __m128i vMul2 = _mm_shuffle_epi32(vMul, _MM_SHUFFLE(3, 2, 3, 2));
 146     //vMul = [A1*B2 - B1*A2]
 147     vMul = _mm_sub_epi64(vMul, vMul2);
 148
 149     int64_t result;
 150     _mm_store_sd((double*)&result, _mm_castsi128_pd(vMul));
 151
 152     double dResult = (double)result;
 153     dResult = dResult * (1.0 / FIXED_POINT16_SCALE);
 154
 155     return (float)dResult;
 156 }
 157
 158 INLINE
 159 void calcDeterminantIntVertical(const simdscalari vA[3], const simdscalari vB[3], simdscalari *pvDet)
 160 {
 161     // refer to calcDeterminantInt comment for calculation explanation
 162     // A1*B2
 163     simdscalari vA1Lo = _simd_unpacklo_epi32(vA[1], vA[1]);     // 0 0 1 1 4 4 5 5
 164     simdscalari vA1Hi = _simd_unpackhi_epi32(vA[1], vA[1]);     // 2 2 3 3 6 6 7 7
 165
 166     simdscalari vB2Lo = _simd_unpacklo_epi32(vB[2], vB[2]);
 167     simdscalari vB2Hi = _simd_unpackhi_epi32(vB[2], vB[2]);
 168
 169     simdscalari vA1B2Lo = _simd_mul_epi32(vA1Lo, vB2Lo);        // 0 1 4 5
 170     simdscalari vA1B2Hi = _simd_mul_epi32(vA1Hi, vB2Hi);        // 2 3 6 7
 171
 172     // B1*A2
 173     simdscalari vA2Lo = _simd_unpacklo_epi32(vA[2], vA[2]);
 174     simdscalari vA2Hi = _simd_unpackhi_epi32(vA[2], vA[2]);
 175
 176     simdscalari vB1Lo = _simd_unpacklo_epi32(vB[1], vB[1]);
 177     simdscalari vB1Hi = _simd_unpackhi_epi32(vB[1], vB[1]);
 178
 179     simdscalari vA2B1Lo = _simd_mul_epi32(vA2Lo, vB1Lo);
 180     simdscalari vA2B1Hi = _simd_mul_epi32(vA2Hi, vB1Hi);
 181
 182     // A1*B2 - A2*B1
 183     simdscalari detLo = _simd_sub_epi64(vA1B2Lo, vA2B1Lo);
 184     simdscalari detHi = _simd_sub_epi64(vA1B2Hi, vA2B1Hi);
 185
 186     // shuffle 0 1 4 5 -> 0 1 2 3
 187     simdscalari vResultLo = _mm256_permute2f128_si256(detLo, detHi, 0x20);
 188     simdscalari vResultHi = _mm256_permute2f128_si256(detLo, detHi, 0x31);
 189
 190     pvDet[0] = vResultLo;
 191     pvDet[1] = vResultHi;
 192 }
 193
 194 INLINE
 195 void triangleSetupC(const __m128 vX, const __m128 vY, const __m128 vA, const __m128 &vB, __m128 &vC)
 196 {
 197     // C = -Ax - By
 198     vC  = _mm_mul_ps(vA, vX);
 199     __m128 vCy = _mm_mul_ps(vB, vY);
 200     vC  = _mm_mul_ps(vC, _mm_set1_ps(-1.0f));
 201     vC  = _mm_sub_ps(vC, vCy);
 202 }
 203
 204 INLINE
 205 void viewportTransform(__m128 &vX, __m128 &vY, __m128 &vZ, const SWR_VIEWPORT_MATRIX &vpMatrix)
 206 {
 207     vX = _mm_mul_ps(vX, _mm_set1_ps(vpMatrix.m00));
 208     vX = _mm_add_ps(vX, _mm_set1_ps(vpMatrix.m30));
 209
 210     vY = _mm_mul_ps(vY, _mm_set1_ps(vpMatrix.m11));
 211     vY = _mm_add_ps(vY, _mm_set1_ps(vpMatrix.m31));
 212
 213     vZ = _mm_mul_ps(vZ, _mm_set1_ps(vpMatrix.m22));
 214     vZ = _mm_add_ps(vZ, _mm_set1_ps(vpMatrix.m32));
 215 }
 216
 217 template<uint32_t NumVerts>
 218 INLINE
 219 void viewportTransform(simdvector *v, const SWR_VIEWPORT_MATRIX & vpMatrix)
 220 {
 221     simdscalar m00 = _simd_load1_ps(&vpMatrix.m00);
 222     simdscalar m30 = _simd_load1_ps(&vpMatrix.m30);
 223     simdscalar m11 = _simd_load1_ps(&vpMatrix.m11);
 224     simdscalar m31 = _simd_load1_ps(&vpMatrix.m31);
 225     simdscalar m22 = _simd_load1_ps(&vpMatrix.m22);
 226     simdscalar m32 = _simd_load1_ps(&vpMatrix.m32);
 227
 228     for (uint32_t i = 0; i < NumVerts; ++i)
 229     {
 230         v[i].x = _simd_fmadd_ps(v[i].x, m00, m30);
 231         v[i].y = _simd_fmadd_ps(v[i].y, m11, m31);
 232         v[i].z = _simd_fmadd_ps(v[i].z, m22, m32);
 233     }
 234 }
 235
 236 INLINE
 237 void calcBoundingBoxInt(const __m128i &vX, const __m128i &vY, BBOX &bbox)
 238 {
 239     // Need horizontal fp min here
 240     __m128i vX1 = _mm_shuffle_epi32(vX, _MM_SHUFFLE(3, 2, 0, 1));
 241     __m128i vX2 = _mm_shuffle_epi32(vX, _MM_SHUFFLE(3, 0, 1, 2));
 242
 243     __m128i vY1 = _mm_shuffle_epi32(vY, _MM_SHUFFLE(3, 2, 0, 1));
 244     __m128i vY2 = _mm_shuffle_epi32(vY, _MM_SHUFFLE(3, 0, 1, 2));
 245
 246
 247     __m128i vMinX = _mm_min_epi32(vX, vX1);
 248             vMinX = _mm_min_epi32(vMinX, vX2);
 249
 250     __m128i vMaxX = _mm_max_epi32(vX, vX1);
 251             vMaxX = _mm_max_epi32(vMaxX, vX2);
 252
 253     __m128i vMinY = _mm_min_epi32(vY, vY1);
 254             vMinY = _mm_min_epi32(vMinY, vY2);
 255
 256     __m128i vMaxY = _mm_max_epi32(vY, vY1);
 257             vMaxY = _mm_max_epi32(vMaxY, vY2);
 258
 259     bbox.left = _mm_extract_epi32(vMinX, 0);
 260     bbox.right = _mm_extract_epi32(vMaxX, 0);
 261     bbox.top = _mm_extract_epi32(vMinY, 0);
 262     bbox.bottom = _mm_extract_epi32(vMaxY, 0);
 263
 264 #if 0
 265     Jacob:  A = _mm_shuffle_ps(X, Y, 0 0 0 0)
 266 B = _mm_shuffle_ps(Z, W, 0 0 0 0)
 267 A = _mm_shuffle_epi32(A, 3 0 3 0)
 268 A = _mm_shuffle_ps(A, B, 1 0 1 0)
 269 #endif
 270
 271 }
 272
 273 INLINE
 274 void calcBoundingBoxIntVertical(const simdscalari (&vX)[3], const simdscalari (&vY)[3], simdBBox &bbox)
 275 {
 276     simdscalari vMinX = vX[0];
 277     vMinX = _simd_min_epi32(vMinX, vX[1]);
 278     vMinX = _simd_min_epi32(vMinX, vX[2]);
 279
 280     simdscalari vMaxX = vX[0];
 281     vMaxX = _simd_max_epi32(vMaxX, vX[1]);
 282     vMaxX = _simd_max_epi32(vMaxX, vX[2]);
 283
 284     simdscalari vMinY = vY[0];
 285     vMinY = _simd_min_epi32(vMinY, vY[1]);
 286     vMinY = _simd_min_epi32(vMinY, vY[2]);
 287
 288     simdscalari vMaxY = vY[0];
 289     vMaxY = _simd_max_epi32(vMaxY, vY[1]);
 290     vMaxY = _simd_max_epi32(vMaxY, vY[2]);
 291
 292     bbox.left = vMinX;
 293     bbox.right = vMaxX;
 294     bbox.top = vMinY;
 295     bbox.bottom = vMaxY;
 296 }
 297
 298 INLINE
 299 bool CanUseSimplePoints(DRAW_CONTEXT *pDC)
 300 {
 301     const API_STATE& state = GetApiState(pDC);
 302
 303     return (state.rastState.sampleCount == SWR_MULTISAMPLE_1X &&
 304             state.rastState.pointSize == 1.0f &&
 305             !state.rastState.pointParam &&
 306             !state.rastState.pointSpriteEnable);
 307 }
 308
 309 uint32_t GetNumPrims(PRIMITIVE_TOPOLOGY mode, uint32_t numElements);
 310 uint32_t NumVertsPerPrim(PRIMITIVE_TOPOLOGY topology, bool includeAdjVerts);
 311
 312 // Templated Draw front-end function.  All combinations of template parameter values are available
 313 template <bool IsIndexedT, bool HasTessellationT, bool HasGeometryShaderT, bool HasStreamOutT, bool HasRastT>
 314 void ProcessDraw(SWR_CONTEXT *pContext, DRAW_CONTEXT *pDC, uint32_t workerId, void *pUserData);
 315
 316 void ProcessClear(SWR_CONTEXT *pContext, DRAW_CONTEXT *pDC, uint32_t workerId, void *pUserData);
 317 void ProcessStoreTiles(SWR_CONTEXT *pContext, DRAW_CONTEXT *pDC, uint32_t workerId, void *pUserData);
 318 void ProcessDiscardInvalidateTiles(SWR_CONTEXT *pContext, DRAW_CONTEXT *pDC, uint32_t workerId, void *pUserData);
 319 void ProcessSync(SWR_CONTEXT *pContext, DRAW_CONTEXT *pDC, uint32_t workerId, void *pUserData);
 320 void ProcessQueryStats(SWR_CONTEXT *pContext, DRAW_CONTEXT *pDC, uint32_t workerId, void *pUserData);
 321
 322 struct PA_STATE_BASE;  // forward decl
 323 void BinTriangles(DRAW_CONTEXT *pDC, PA_STATE& pa, uint32_t workerId, simdvector tri[3], uint32_t primMask, simdscalari primID);
 324 void BinPoints(DRAW_CONTEXT *pDC, PA_STATE& pa, uint32_t workerId, simdvector prims[3], uint32_t primMask, simdscalari primID);
 325 void BinLines(DRAW_CONTEXT *pDC, PA_STATE& pa, uint32_t workerId, simdvector prims[3], uint32_t primMask, simdscalari primID);
 326