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https://github.com/ZDoom/gzdoom.git
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Remove some multiplications and branching from the triangle drawer
This commit is contained in:
Magnus Norddahl
parent
046f5f2b2e
commit
b450ac5047
2 changed files with 90 additions and 61 deletions
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@ -134,12 +134,20 @@ void DrawTriangleCodegen::Setup()
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v3.y = SSAFloat(Y3) * 0.0625f;
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gradWX = gradx(v1.x, v1.y, v2.x, v2.y, v3.x, v3.y, v1.w, v2.w, v3.w);
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gradWY = grady(v1.x, v1.y, v2.x, v2.y, v3.x, v3.y, v1.w, v2.w, v3.w);
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startW = v1.w + gradWX * (SSAFloat(minx) - v1.x) + gradWY * (SSAFloat(miny) - v1.y);
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stack_posy_w.store(v1.w + gradWX * (SSAFloat(minx) - v1.x) + gradWY * (SSAFloat(miny) - v1.y));
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for (int i = 0; i < TriVertex::NumVarying; i++)
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{
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gradVaryingX[i] = gradx(v1.x, v1.y, v2.x, v2.y, v3.x, v3.y, v1.varying[i] * v1.w, v2.varying[i] * v2.w, v3.varying[i] * v3.w);
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gradVaryingY[i] = grady(v1.x, v1.y, v2.x, v2.y, v3.x, v3.y, v1.varying[i] * v1.w, v2.varying[i] * v2.w, v3.varying[i] * v3.w);
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startVarying[i] = v1.varying[i] * v1.w + gradVaryingX[i] * (SSAFloat(minx) - v1.x) + gradVaryingY[i] * (SSAFloat(miny) - v1.y);
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stack_posy_varying[i].store(v1.varying[i] * v1.w + gradVaryingX[i] * (SSAFloat(minx) - v1.x) + gradVaryingY[i] * (SSAFloat(miny) - v1.y));
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}
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gradWX = gradWX * (float)q;
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gradWY = gradWY * (float)q;
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for (int i = 0; i < TriVertex::NumVarying; i++)
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{
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gradVaryingX[i] = gradVaryingX[i] * (float)q;
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gradVaryingY[i] = gradVaryingY[i] * (float)q;
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}
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}
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@ -161,26 +169,32 @@ void DrawTriangleCodegen::LoopBlockY()
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{
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int pixelsize = truecolor ? 4 : 1;
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stack_y.store(miny);
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stack_dest.store(dest);
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stack_subsectorGBuffer.store(subsectorGBuffer);
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SSAInt blocks_skipped = skipped_by_thread(miny / q, thread);
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stack_y.store(miny + blocks_skipped * q);
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stack_dest.store(dest[blocks_skipped * q * pitch * pixelsize]);
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stack_subsectorGBuffer.store(subsectorGBuffer[blocks_skipped * q * pitch]);
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stack_posy_w.store(stack_posy_w.load() + gradWY * blocks_skipped);
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for (int i = 0; i < TriVertex::NumVarying; i++)
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stack_posy_varying[i].store(stack_posy_varying[i].load() + gradVaryingY[i] * blocks_skipped);
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SSAForBlock loop;
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y = stack_y.load();
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dest = stack_dest.load();
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subsectorGBuffer = stack_subsectorGBuffer.load();
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posy_w = stack_posy_w.load();
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for (int i = 0; i < TriVertex::NumVarying; i++)
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posy_varying[i] = stack_posy_varying[i].load();
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loop.loop_block(y < maxy, 0);
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{
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SSAIfBlock branch;
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branch.if_block((y / q) % thread.num_cores == thread.core);
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{
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LoopBlockX();
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}
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branch.end_block();
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stack_dest.store(dest[q * pitch * pixelsize]);
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stack_subsectorGBuffer.store(subsectorGBuffer[q * pitch]);
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stack_y.store(y + q);
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stack_posy_w.store(posy_w + gradWY * thread.num_cores);
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for (int i = 0; i < TriVertex::NumVarying; i++)
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stack_posy_varying[i].store(posy_varying[i] + gradVaryingY[i] * thread.num_cores);
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stack_dest.store(dest[q * pitch * pixelsize * thread.num_cores]);
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stack_subsectorGBuffer.store(subsectorGBuffer[q * pitch * thread.num_cores]);
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stack_y.store(y + thread.num_cores * q);
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}
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loop.end_block();
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}
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@ -188,9 +202,15 @@ void DrawTriangleCodegen::LoopBlockY()
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void DrawTriangleCodegen::LoopBlockX()
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{
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stack_x.store(minx);
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stack_posx_w.store(posy_w);
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for (int i = 0; i < TriVertex::NumVarying; i++)
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stack_posx_varying[i].store(stack_posy_varying[i].load());
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SSAForBlock loop;
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x = stack_x.load();
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posx_w = stack_posx_w.load();
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for (int i = 0; i < TriVertex::NumVarying; i++)
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posx_varying[i] = stack_posx_varying[i].load();
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loop.loop_block(x < maxx, 0);
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{
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// Corners of block
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@ -226,51 +246,7 @@ void DrawTriangleCodegen::LoopBlockX()
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// Check if block needs clipping
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SSABool clipneeded = x < clipleft || (x + q) > clipright || y < cliptop || (y + q) > clipbottom;
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// Calculate varying variables for affine block
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SSAFloat offx0 = SSAFloat(x - minx);
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SSAFloat offy0 = SSAFloat(y - miny);
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SSAFloat offx1 = offx0 + SSAFloat(q);
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SSAFloat offy1 = offy0 + SSAFloat(q);
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SSAFloat rcpWTL = 1.0f / (startW + offx0 * gradWX + offy0 * gradWY);
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SSAFloat rcpWTR = 1.0f / (startW + offx1 * gradWX + offy0 * gradWY);
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SSAFloat rcpWBL = 1.0f / (startW + offx0 * gradWX + offy1 * gradWY);
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SSAFloat rcpWBR = 1.0f / (startW + offx1 * gradWX + offy1 * gradWY);
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for (int i = 0; i < TriVertex::NumVarying; i++)
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{
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SSAFloat varyingTL = (startVarying[i] + offx0 * gradVaryingX[i] + offy0 * gradVaryingY[i]) * rcpWTL;
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SSAFloat varyingTR = (startVarying[i] + offx1 * gradVaryingX[i] + offy0 * gradVaryingY[i]) * rcpWTR;
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SSAFloat varyingBL = (startVarying[i] + offx0 * gradVaryingX[i] + offy1 * gradVaryingY[i]) * rcpWBL;
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SSAFloat varyingBR = (startVarying[i] + offx1 * gradVaryingX[i] + offy1 * gradVaryingY[i]) * rcpWBR;
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SSAFloat startStepX = (varyingTR - varyingTL) * (1.0f / q);
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SSAFloat endStepX = (varyingBR - varyingBL) * (1.0f / q);
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SSAFloat incrStepX = (endStepX - startStepX) * (1.0f / q);
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SSAFloat stepY = (varyingBL - varyingTL) * (1.0f / q);
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varyingPos[i] = SSAInt(varyingTL * SSAFloat((float)0x01000000), false) << 8;
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varyingStepY[i] = SSAInt(stepY * SSAFloat((float)0x01000000), false) << 8;
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varyingStartStepX[i] = SSAInt(startStepX * SSAFloat((float)0x01000000), false) << 8;
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varyingIncrStepX[i] = SSAInt(incrStepX * SSAFloat((float)0x01000000), false) << 8;
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}
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SSAFloat globVis = SSAFloat(1706.0f);
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SSAFloat vis = globVis / rcpWTL;
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SSAFloat shade = 64.0f - (SSAFloat(light * 255 / 256) + 12.0f) * 32.0f / 128.0f;
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SSAFloat lightscale = SSAFloat::clamp((shade - SSAFloat::MIN(SSAFloat(24.0f), vis)) / 32.0f, SSAFloat(0.0f), SSAFloat(31.0f / 32.0f));
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SSAInt diminishedlight = SSAInt(SSAFloat::clamp((1.0f - lightscale) * 256.0f + 0.5f, SSAFloat(0.0f), SSAFloat(256.0f)), false);
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if (!truecolor)
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{
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SSAInt diminishedindex = SSAInt(lightscale * 32.0f, false);
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SSAInt lightindex = SSAInt::MIN((256 - light) * 32 / 256, SSAInt(31));
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SSAInt colormapindex = is_fixed_light.select(lightindex, diminishedindex);
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currentcolormap = Colormaps[colormapindex << 8];
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}
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else
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{
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currentlight = is_fixed_light.select(light, diminishedlight);
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}
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SetupAffineBlock();
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SetStencilBlock(x / 8 + y / 8 * stencilPitch);
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SSABool covered = a == SSAInt(0xF) && b == SSAInt(0xF) && c == SSAInt(0xF) && !clipneeded && StencilIsSingleValue();
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@ -289,11 +265,55 @@ void DrawTriangleCodegen::LoopBlockX()
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branch.end_block();
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stack_posx_w.store(posx_w + gradWX);
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for (int i = 0; i < TriVertex::NumVarying; i++)
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stack_posx_varying[i].store(posx_varying[i] + gradVaryingX[i]);
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stack_x.store(x + q);
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}
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loop.end_block();
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}
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void DrawTriangleCodegen::SetupAffineBlock()
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{
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// Calculate varying variables for affine block
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SSAVec4f rcpW = SSAVec4f::rcp(SSAVec4f(posx_w, posx_w + gradWX, posx_w + gradWY, posx_w + gradWX + gradWY));
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for (int i = 0; i < TriVertex::NumVarying; i++)
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{
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// Top left, top right, bottom left, bottom right:
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SSAVec4f varying = SSAVec4f(posx_varying[i], posx_varying[i] + gradVaryingX[i], posx_varying[i] + gradVaryingY[i], posx_varying[i] + gradVaryingX[i] + gradVaryingY[i]) * rcpW;
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SSAFloat startStepX = (varying[1] - varying[0]) * (1.0f / q);
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SSAFloat endStepX = (varying[3] - varying[2]) * (1.0f / q);
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SSAFloat incrStepX = (endStepX - startStepX) * (1.0f / q);
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SSAFloat stepY = (varying[2] - varying[0]) * (1.0f / q);
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SSAVec4i ints = SSAVec4i(SSAVec4f(varying[0], stepY, startStepX, incrStepX) * (float)0x01000000) << 8;
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varyingPos[i] = ints[0];
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varyingStepY[i] = ints[1];
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varyingStartStepX[i] = ints[2];
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varyingIncrStepX[i] = ints[3];
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}
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SSAFloat globVis = SSAFloat(1706.0f);
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SSAFloat vis = globVis / rcpW[0];
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SSAFloat shade = 64.0f - (SSAFloat(light * 255 / 256) + 12.0f) * 32.0f / 128.0f;
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SSAFloat lightscale = SSAFloat::clamp((shade - SSAFloat::MIN(SSAFloat(24.0f), vis)) / 32.0f, SSAFloat(0.0f), SSAFloat(31.0f / 32.0f));
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SSAInt diminishedlight = SSAInt(SSAFloat::clamp((1.0f - lightscale) * 256.0f + 0.5f, SSAFloat(0.0f), SSAFloat(256.0f)), false);
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if (!truecolor)
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{
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SSAInt diminishedindex = SSAInt(lightscale * 32.0f, false);
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SSAInt lightindex = SSAInt::MIN((256 - light) * 32 / 256, SSAInt(31));
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SSAInt colormapindex = is_fixed_light.select(lightindex, diminishedindex);
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currentcolormap = Colormaps[colormapindex << 8];
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}
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else
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{
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currentlight = is_fixed_light.select(light, diminishedlight);
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}
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}
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void DrawTriangleCodegen::LoopFullBlock()
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{
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SSAIfBlock branch_stenciltest;
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@ -835,6 +855,8 @@ void DrawTriangleCodegen::LoadArgs(SSAValue args, SSAValue thread_data)
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thread.core = thread_data[0][0].load(true);
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thread.num_cores = thread_data[0][1].load(true);
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thread.pass_start_y = SSAInt(0);
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thread.pass_end_y = SSAInt(32000);
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}
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SSATriVertex DrawTriangleCodegen::LoadTriVertex(SSAValue ptr)
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@ -45,6 +45,7 @@ private:
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void LoopBlockX();
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void LoopFullBlock();
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void LoopPartialBlock();
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void SetupAffineBlock();
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SSAVec4i ProcessPixel32(SSAVec4i bg, SSAInt *varying);
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SSAInt ProcessPixel8(SSAInt bg, SSAInt *varying);
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@ -85,6 +86,9 @@ private:
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SSAStack<SSAInt> stack_CY1, stack_CY2, stack_CY3;
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SSAStack<SSAInt> stack_CX1, stack_CX2, stack_CX3;
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SSAStack<SSAFloat> stack_posy_w, stack_posy_varying[TriVertex::NumVarying];
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SSAStack<SSAFloat> stack_posx_w, stack_posx_varying[TriVertex::NumVarying];
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SSAUBytePtr dest;
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SSAInt pitch;
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SSATriVertex v1;
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@ -131,8 +135,8 @@ private:
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SSAInt FDY12, FDY23, FDY31;
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SSAInt minx, maxx, miny, maxy;
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SSAInt C1, C2, C3;
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SSAFloat gradWX, gradWY, startW;
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SSAFloat gradVaryingX[TriVertex::NumVarying], gradVaryingY[TriVertex::NumVarying], startVarying[TriVertex::NumVarying];
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SSAFloat gradWX, gradWY;
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SSAFloat gradVaryingX[TriVertex::NumVarying], gradVaryingY[TriVertex::NumVarying];
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SSAInt x, y;
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SSAInt x0, x1, y0, y1;
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@ -143,6 +147,9 @@ private:
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SSAInt varyingStartStepX[TriVertex::NumVarying];
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SSAInt varyingIncrStepX[TriVertex::NumVarying];
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SSAFloat posy_w, posy_varying[TriVertex::NumVarying];
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SSAFloat posx_w, posx_varying[TriVertex::NumVarying];
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SSAUBytePtr StencilBlock;
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SSAIntPtr StencilBlockMask;
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};
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