/****************************************************************************
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* Copyright (C) 2014-2015 Intel Corporation. All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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* @file frontend.h
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*
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* @brief Definitions for Frontend which handles vertex processing,
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* primitive assembly, clipping, binning, etc.
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*
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******************************************************************************/
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#pragma once
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#include "context.h"
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#include "common/simdintrin.h"
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#include <type_traits>
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// Calculates the A and B coefficients for the 3 edges of the triangle
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//
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// maths for edge equations:
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// standard form of a line in 2d
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// Ax + By + C = 0
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// A = y0 - y1
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// B = x1 - x0
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// C = x0y1 - x1y0
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INLINE
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void triangleSetupAB(const __m128 vX, const __m128 vY, __m128 & vA, __m128 & vB)
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{
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// vYsub = y1 y2 y0 dc
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__m128 vYsub = _mm_shuffle_ps(vY, vY, _MM_SHUFFLE(3, 0, 2, 1));
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// vY = y0 y1 y2 dc
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vA = _mm_sub_ps(vY, vYsub);
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// Result:
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// A[0] = y0 - y1
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// A[1] = y1 - y2
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// A[2] = y2 - y0
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// vXsub = x1 x2 x0 dc
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__m128 vXsub = _mm_shuffle_ps(vX, vX, _MM_SHUFFLE(3, 0, 2, 1));
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// vX = x0 x1 x2 dc
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vB = _mm_sub_ps(vXsub, vX);
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// Result:
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// B[0] = x1 - x0
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// B[1] = x2 - x1
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// B[2] = x0 - x2
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}
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INLINE
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void triangleSetupABInt(const __m128i vX, const __m128i vY, __m128i & vA, __m128i & vB)
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{
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// generate edge equations
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// A = y0 - y1
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// B = x1 - x0
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// C = x0y1 - x1y0
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__m128i vYsub = _mm_shuffle_epi32(vY, _MM_SHUFFLE(3, 0, 2, 1));
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vA = _mm_sub_epi32(vY, vYsub);
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__m128i vXsub = _mm_shuffle_epi32(vX, _MM_SHUFFLE(3, 0, 2, 1));
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vB = _mm_sub_epi32(vXsub, vX);
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}
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INLINE
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void triangleSetupABIntVertical(const simdscalari vX[3], const simdscalari vY[3], simdscalari (&vA)[3], simdscalari (&vB)[3])
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{
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// A = y0 - y1
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// B = x1 - x0
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vA[0] = _simd_sub_epi32(vY[0], vY[1]);
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vA[1] = _simd_sub_epi32(vY[1], vY[2]);
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vA[2] = _simd_sub_epi32(vY[2], vY[0]);
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vB[0] = _simd_sub_epi32(vX[1], vX[0]);
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vB[1] = _simd_sub_epi32(vX[2], vX[1]);
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vB[2] = _simd_sub_epi32(vX[0], vX[2]);
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}
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#if ENABLE_AVX512_SIMD16
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INLINE
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void triangleSetupABIntVertical(const simd16scalari vX[3], const simd16scalari vY[3], simd16scalari(&vA)[3], simd16scalari(&vB)[3])
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{
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// A = y0 - y1
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// B = x1 - x0
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vA[0] = _simd16_sub_epi32(vY[0], vY[1]);
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vA[1] = _simd16_sub_epi32(vY[1], vY[2]);
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vA[2] = _simd16_sub_epi32(vY[2], vY[0]);
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vB[0] = _simd16_sub_epi32(vX[1], vX[0]);
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vB[1] = _simd16_sub_epi32(vX[2], vX[1]);
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vB[2] = _simd16_sub_epi32(vX[0], vX[2]);
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}
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#endif
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// Calculate the determinant of the triangle
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// 2 vectors between the 3 points: P, Q
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// Px = x0-x2, Py = y0-y2
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// Qx = x1-x2, Qy = y1-y2
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// |Px Qx|
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// det = | | = PxQy - PyQx
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// |Py Qy|
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// simplifies to : (x0-x2)*(y1-y2) - (y0-y2)*(x1-x2)
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// try to reuse our A & B coef's already calculated. factor out a -1 from Py and Qx
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// : B[2]*A[1] - (-(y2-y0))*(-(x2-x1))
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// : B[2]*A[1] - (-1)(-1)(y2-y0)*(x2-x1)
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// : B[2]*A[1] - A[2]*B[1]
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INLINE
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float calcDeterminantInt(const __m128i vA, const __m128i vB)
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{
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// vAShuf = [A1, A0, A2, A0]
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__m128i vAShuf = _mm_shuffle_epi32(vA, _MM_SHUFFLE(0, 2, 0, 1));
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// vBShuf = [B2, B0, B1, B0]
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__m128i vBShuf = _mm_shuffle_epi32(vB, _MM_SHUFFLE(0, 1, 0, 2));
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// vMul = [A1*B2, B1*A2]
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__m128i vMul = _mm_mul_epi32(vAShuf, vBShuf);
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// shuffle upper to lower
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// vMul2 = [B1*A2, B1*A2]
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__m128i vMul2 = _mm_shuffle_epi32(vMul, _MM_SHUFFLE(3, 2, 3, 2));
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//vMul = [A1*B2 - B1*A2]
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vMul = _mm_sub_epi64(vMul, vMul2);
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int64_t result;
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_mm_store_sd((double*)&result, _mm_castsi128_pd(vMul));
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double dResult = (double)result;
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dResult = dResult * (1.0 / FIXED_POINT16_SCALE);
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return (float)dResult;
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}
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INLINE
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void calcDeterminantIntVertical(const simdscalari vA[3], const simdscalari vB[3], simdscalari *pvDet)
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{
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// refer to calcDeterminantInt comment for calculation explanation
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// A1*B2
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simdscalari vA1Lo = _simd_unpacklo_epi32(vA[1], vA[1]); // 0 0 1 1 4 4 5 5
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simdscalari vA1Hi = _simd_unpackhi_epi32(vA[1], vA[1]); // 2 2 3 3 6 6 7 7
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simdscalari vB2Lo = _simd_unpacklo_epi32(vB[2], vB[2]);
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simdscalari vB2Hi = _simd_unpackhi_epi32(vB[2], vB[2]);
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simdscalari vA1B2Lo = _simd_mul_epi32(vA1Lo, vB2Lo); // 0 1 4 5
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simdscalari vA1B2Hi = _simd_mul_epi32(vA1Hi, vB2Hi); // 2 3 6 7
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// B1*A2
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simdscalari vA2Lo = _simd_unpacklo_epi32(vA[2], vA[2]);
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simdscalari vA2Hi = _simd_unpackhi_epi32(vA[2], vA[2]);
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simdscalari vB1Lo = _simd_unpacklo_epi32(vB[1], vB[1]);
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simdscalari vB1Hi = _simd_unpackhi_epi32(vB[1], vB[1]);
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simdscalari vA2B1Lo = _simd_mul_epi32(vA2Lo, vB1Lo);
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simdscalari vA2B1Hi = _simd_mul_epi32(vA2Hi, vB1Hi);
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// A1*B2 - A2*B1
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simdscalari detLo = _simd_sub_epi64(vA1B2Lo, vA2B1Lo);
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simdscalari detHi = _simd_sub_epi64(vA1B2Hi, vA2B1Hi);
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// shuffle 0 1 4 5 2 3 6 7 -> 0 1 2 3
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simdscalari vResultLo = _simd_permute2f128_si(detLo, detHi, 0x20);
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// shuffle 0 1 4 5 2 3 6 7 -> 4 5 6 7
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simdscalari vResultHi = _simd_permute2f128_si(detLo, detHi, 0x31);
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pvDet[0] = vResultLo;
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pvDet[1] = vResultHi;
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}
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#if ENABLE_AVX512_SIMD16
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INLINE
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void calcDeterminantIntVertical(const simd16scalari vA[3], const simd16scalari vB[3], simd16scalari *pvDet)
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{
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// refer to calcDeterminantInt comment for calculation explanation
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// A1*B2
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simd16scalari vA1_lo = _simd16_unpacklo_epi32(vA[1], vA[1]); // X 0 X 1 X 4 X 5 X 8 X 9 X C X D (32b)
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simd16scalari vA1_hi = _simd16_unpackhi_epi32(vA[1], vA[1]); // X 2 X 3 X 6 X 7 X A X B X E X F
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simd16scalari vB2_lo = _simd16_unpacklo_epi32(vB[2], vB[2]);
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simd16scalari vB2_hi = _simd16_unpackhi_epi32(vB[2], vB[2]);
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simd16scalari vA1B2_lo = _simd16_mul_epi32(vA1_lo, vB2_lo); // 0 1 4 5 8 9 C D (64b)
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simd16scalari vA1B2_hi = _simd16_mul_epi32(vA1_hi, vB2_hi); // 2 3 6 7 A B E F
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// B1*A2
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simd16scalari vA2_lo = _simd16_unpacklo_epi32(vA[2], vA[2]);
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simd16scalari vA2_hi = _simd16_unpackhi_epi32(vA[2], vA[2]);
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simd16scalari vB1_lo = _simd16_unpacklo_epi32(vB[1], vB[1]);
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simd16scalari vB1_hi = _simd16_unpackhi_epi32(vB[1], vB[1]);
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simd16scalari vA2B1_lo = _simd16_mul_epi32(vA2_lo, vB1_lo);
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simd16scalari vA2B1_hi = _simd16_mul_epi32(vA2_hi, vB1_hi);
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// A1*B2 - A2*B1
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simd16scalari difflo = _simd16_sub_epi64(vA1B2_lo, vA2B1_lo); // 0 1 4 5 8 9 C D (64b)
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simd16scalari diffhi = _simd16_sub_epi64(vA1B2_hi, vA2B1_hi); // 2 3 6 7 A B E F
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// (1, 0, 1, 0) = 01 00 01 00 = 0x44, (3, 2, 3, 2) = 11 10 11 10 = 0xEE
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simd16scalari templo = _simd16_permute2f128_si(difflo, diffhi, 0x44); // 0 1 4 5 2 3 6 7 (64b)
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simd16scalari temphi = _simd16_permute2f128_si(difflo, diffhi, 0xEE); // 8 9 C D A B E F
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// (3, 1, 2, 0) = 11 01 10 00 = 0xD8
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pvDet[0] = _simd16_permute2f128_si(templo, templo, 0xD8); // 0 1 2 3 4 5 6 7 (64b)
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pvDet[1] = _simd16_permute2f128_si(temphi, temphi, 0xD8); // 8 9 A B C D E F
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}
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#endif
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INLINE
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void triangleSetupC(const __m128 vX, const __m128 vY, const __m128 vA, const __m128 &vB, __m128 &vC)
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{
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// C = -Ax - By
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vC = _mm_mul_ps(vA, vX);
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__m128 vCy = _mm_mul_ps(vB, vY);
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vC = _mm_mul_ps(vC, _mm_set1_ps(-1.0f));
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vC = _mm_sub_ps(vC, vCy);
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}
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template<uint32_t NumVerts>
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INLINE
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void viewportTransform(simdvector *v, const SWR_VIEWPORT_MATRICES & vpMatrices)
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{
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simdscalar m00 = _simd_load1_ps(&vpMatrices.m00[0]);
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simdscalar m30 = _simd_load1_ps(&vpMatrices.m30[0]);
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simdscalar m11 = _simd_load1_ps(&vpMatrices.m11[0]);
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simdscalar m31 = _simd_load1_ps(&vpMatrices.m31[0]);
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simdscalar m22 = _simd_load1_ps(&vpMatrices.m22[0]);
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simdscalar m32 = _simd_load1_ps(&vpMatrices.m32[0]);
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for (uint32_t i = 0; i < NumVerts; ++i)
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{
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v[i].x = _simd_fmadd_ps(v[i].x, m00, m30);
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v[i].y = _simd_fmadd_ps(v[i].y, m11, m31);
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v[i].z = _simd_fmadd_ps(v[i].z, m22, m32);
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}
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}
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#if USE_SIMD16_FRONTEND
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template<uint32_t NumVerts>
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INLINE
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void viewportTransform(simd16vector *v, const SWR_VIEWPORT_MATRICES & vpMatrices)
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{
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const simd16scalar m00 = _simd16_broadcast_ss(&vpMatrices.m00[0]);
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const simd16scalar m30 = _simd16_broadcast_ss(&vpMatrices.m30[0]);
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const simd16scalar m11 = _simd16_broadcast_ss(&vpMatrices.m11[0]);
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const simd16scalar m31 = _simd16_broadcast_ss(&vpMatrices.m31[0]);
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const simd16scalar m22 = _simd16_broadcast_ss(&vpMatrices.m22[0]);
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const simd16scalar m32 = _simd16_broadcast_ss(&vpMatrices.m32[0]);
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for (uint32_t i = 0; i < NumVerts; ++i)
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{
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v[i].x = _simd16_fmadd_ps(v[i].x, m00, m30);
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v[i].y = _simd16_fmadd_ps(v[i].y, m11, m31);
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v[i].z = _simd16_fmadd_ps(v[i].z, m22, m32);
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}
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}
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#endif
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template<uint32_t NumVerts>
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INLINE
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void viewportTransform(simdvector *v, const SWR_VIEWPORT_MATRICES & vpMatrices, simdscalari const &vViewportIdx)
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{
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// perform a gather of each matrix element based on the viewport array indexes
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simdscalar m00 = _simd_i32gather_ps(&vpMatrices.m00[0], vViewportIdx, 4);
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simdscalar m30 = _simd_i32gather_ps(&vpMatrices.m30[0], vViewportIdx, 4);
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simdscalar m11 = _simd_i32gather_ps(&vpMatrices.m11[0], vViewportIdx, 4);
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simdscalar m31 = _simd_i32gather_ps(&vpMatrices.m31[0], vViewportIdx, 4);
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simdscalar m22 = _simd_i32gather_ps(&vpMatrices.m22[0], vViewportIdx, 4);
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simdscalar m32 = _simd_i32gather_ps(&vpMatrices.m32[0], vViewportIdx, 4);
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for (uint32_t i = 0; i < NumVerts; ++i)
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{
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v[i].x = _simd_fmadd_ps(v[i].x, m00, m30);
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v[i].y = _simd_fmadd_ps(v[i].y, m11, m31);
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v[i].z = _simd_fmadd_ps(v[i].z, m22, m32);
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}
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}
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#if USE_SIMD16_FRONTEND
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template<uint32_t NumVerts>
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INLINE
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void viewportTransform(simd16vector *v, const SWR_VIEWPORT_MATRICES & vpMatrices, simd16scalari const &vViewportIdx)
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{
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// perform a gather of each matrix element based on the viewport array indexes
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const simd16scalar m00 = _simd16_i32gather_ps(&vpMatrices.m00[0], vViewportIdx, 4);
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const simd16scalar m30 = _simd16_i32gather_ps(&vpMatrices.m30[0], vViewportIdx, 4);
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const simd16scalar m11 = _simd16_i32gather_ps(&vpMatrices.m11[0], vViewportIdx, 4);
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const simd16scalar m31 = _simd16_i32gather_ps(&vpMatrices.m31[0], vViewportIdx, 4);
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const simd16scalar m22 = _simd16_i32gather_ps(&vpMatrices.m22[0], vViewportIdx, 4);
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const simd16scalar m32 = _simd16_i32gather_ps(&vpMatrices.m32[0], vViewportIdx, 4);
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for (uint32_t i = 0; i < NumVerts; ++i)
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{
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v[i].x = _simd16_fmadd_ps(v[i].x, m00, m30);
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v[i].y = _simd16_fmadd_ps(v[i].y, m11, m31);
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v[i].z = _simd16_fmadd_ps(v[i].z, m22, m32);
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}
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}
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#endif
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INLINE
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void calcBoundingBoxInt(const __m128i &vX, const __m128i &vY, SWR_RECT &bbox)
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{
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// Need horizontal fp min here
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__m128i vX1 = _mm_shuffle_epi32(vX, _MM_SHUFFLE(3, 2, 0, 1));
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__m128i vX2 = _mm_shuffle_epi32(vX, _MM_SHUFFLE(3, 0, 1, 2));
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__m128i vY1 = _mm_shuffle_epi32(vY, _MM_SHUFFLE(3, 2, 0, 1));
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__m128i vY2 = _mm_shuffle_epi32(vY, _MM_SHUFFLE(3, 0, 1, 2));
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__m128i vMinX = _mm_min_epi32(vX, vX1);
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vMinX = _mm_min_epi32(vMinX, vX2);
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__m128i vMaxX = _mm_max_epi32(vX, vX1);
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vMaxX = _mm_max_epi32(vMaxX, vX2);
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__m128i vMinY = _mm_min_epi32(vY, vY1);
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vMinY = _mm_min_epi32(vMinY, vY2);
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__m128i vMaxY = _mm_max_epi32(vY, vY1);
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vMaxY = _mm_max_epi32(vMaxY, vY2);
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bbox.xmin = _mm_extract_epi32(vMinX, 0);
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bbox.xmax = _mm_extract_epi32(vMaxX, 0);
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bbox.ymin = _mm_extract_epi32(vMinY, 0);
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bbox.ymax = _mm_extract_epi32(vMaxY, 0);
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}
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INLINE
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bool CanUseSimplePoints(DRAW_CONTEXT *pDC)
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{
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const API_STATE& state = GetApiState(pDC);
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return (state.rastState.sampleCount == SWR_MULTISAMPLE_1X &&
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state.rastState.pointSize == 1.0f &&
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!state.rastState.pointParam &&
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!state.rastState.pointSpriteEnable &&
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!state.backendState.clipDistanceMask);
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}
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INLINE
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bool vHasNaN(const __m128& vec)
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{
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const __m128 result = _mm_cmpunord_ps(vec, vec);
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const int32_t mask = _mm_movemask_ps(result);
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return (mask != 0);
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}
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uint32_t GetNumPrims(PRIMITIVE_TOPOLOGY mode, uint32_t numElements);
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uint32_t NumVertsPerPrim(PRIMITIVE_TOPOLOGY topology, bool includeAdjVerts);
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// ProcessDraw front-end function. All combinations of parameter values are available
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PFN_FE_WORK_FUNC GetProcessDrawFunc(
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bool IsIndexed,
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bool IsCutIndexEnabled,
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bool HasTessellation,
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bool HasGeometryShader,
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bool HasStreamOut,
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bool HasRasterization);
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void ProcessClear(SWR_CONTEXT *pContext, DRAW_CONTEXT *pDC, uint32_t workerId, void *pUserData);
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void ProcessStoreTiles(SWR_CONTEXT *pContext, DRAW_CONTEXT *pDC, uint32_t workerId, void *pUserData);
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void ProcessDiscardInvalidateTiles(SWR_CONTEXT *pContext, DRAW_CONTEXT *pDC, uint32_t workerId, void *pUserData);
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void ProcessSync(SWR_CONTEXT *pContext, DRAW_CONTEXT *pDC, uint32_t workerId, void *pUserData);
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void ProcessShutdown(SWR_CONTEXT *pContext, DRAW_CONTEXT *pDC, uint32_t workerId, void *pUserData);
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PFN_PROCESS_PRIMS GetBinTrianglesFunc(bool IsConservative);
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#if USE_SIMD16_FRONTEND
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PFN_PROCESS_PRIMS_SIMD16 GetBinTrianglesFunc_simd16(bool IsConservative);
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#endif
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struct PA_STATE_BASE; // forward decl
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void BinPoints(DRAW_CONTEXT *pDC, PA_STATE& pa, uint32_t workerId, simdvector prims[3], uint32_t primMask, simdscalari const &primID, simdscalari const &viewportIdx, simdscalari const &rtIdx);
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void BinLines(DRAW_CONTEXT *pDC, PA_STATE& pa, uint32_t workerId, simdvector prims[3], uint32_t primMask, simdscalari const &primID, simdscalari const &viewportIdx, simdscalari const &rtIdx);
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#if USE_SIMD16_FRONTEND
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void SIMDCALL BinPoints_simd16(DRAW_CONTEXT *pDC, PA_STATE& pa, uint32_t workerId, simd16vector prims[3], uint32_t primMask, simd16scalari const &primID, simd16scalari const &viewportIdx, simd16scalari const &rtIdx);
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void SIMDCALL BinLines_simd16(DRAW_CONTEXT *pDC, PA_STATE& pa, uint32_t workerId, simd16vector prims[3], uint32_t primMask, simd16scalari const &primID, simd16scalari const &viewportIdx, simd16scalari const &rtIdx);
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#endif
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