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https://github.com/ZDoom/qzdoom.git
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Remove use of the llvm.round intrinsic as it apparently doesn't work in some environments
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parent
87e9ba0f05
commit
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4 changed files with 18 additions and 7 deletions
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@ -39,18 +39,25 @@ void DrawTriangleCodegen::Generate(TriDrawVariant variant, bool truecolor, SSAVa
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LoopBlockY(variant, truecolor);
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}
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SSAInt DrawTriangleCodegen::FloatTo28_4(SSAFloat v)
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{
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// SSAInt(SSAFloat::round(16.0f * v), false);
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SSAInt a = SSAInt(v * 32.0f, false);
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return (a + (a.ashr(31) | SSAInt(1))).ashr(1);
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}
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void DrawTriangleCodegen::Setup(TriDrawVariant variant, bool truecolor)
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{
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int pixelsize = truecolor ? 4 : 1;
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// 28.4 fixed-point coordinates
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Y1 = SSAInt(SSAFloat::round(16.0f * v1.y), false);
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Y2 = SSAInt(SSAFloat::round(16.0f * v2.y), false);
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Y3 = SSAInt(SSAFloat::round(16.0f * v3.y), false);
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Y1 = FloatTo28_4(v1.y);
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Y2 = FloatTo28_4(v2.y);
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Y3 = FloatTo28_4(v3.y);
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X1 = SSAInt(SSAFloat::round(16.0f * v1.x), false);
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X2 = SSAInt(SSAFloat::round(16.0f * v2.x), false);
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X3 = SSAInt(SSAFloat::round(16.0f * v3.x), false);
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X1 = FloatTo28_4(v1.x);
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X2 = FloatTo28_4(v2.x);
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X3 = FloatTo28_4(v3.x);
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// Deltas
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DX12 = X1 - X2;
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@ -40,6 +40,7 @@ private:
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SSATriVertex LoadTriVertex(SSAValue v);
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void LoadUniforms(SSAValue uniforms);
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void Setup(TriDrawVariant variant, bool truecolor);
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SSAInt FloatTo28_4(SSAFloat v);
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void LoopBlockY(TriDrawVariant variant, bool truecolor);
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void LoopBlockX(TriDrawVariant variant, bool truecolor);
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void LoopFullBlock(TriDrawVariant variant, bool truecolor);
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@ -112,12 +112,15 @@ SSAFloat SSAFloat::fma(SSAFloat a, SSAFloat b, SSAFloat c)
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return SSAFloat::from_llvm(SSAScope::builder().CreateCall(SSAScope::intrinsic(llvm::Intrinsic::fma, params), args, SSAScope::hint()));
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}
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/* This intrinsic isn't always available..
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SSAFloat SSAFloat::round(SSAFloat val)
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{
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std::vector<llvm::Type *> params;
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params.push_back(SSAFloat::llvm_type());
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return SSAFloat::from_llvm(SSAScope::builder().CreateCall(SSAScope::intrinsic(llvm::Intrinsic::round, params), val.v, SSAScope::hint()));
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}
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*/
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SSAFloat SSAFloat::floor(SSAFloat val)
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{
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@ -43,7 +43,7 @@ public:
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static SSAFloat exp(SSAFloat val);
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static SSAFloat log(SSAFloat val);
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static SSAFloat fma(SSAFloat a, SSAFloat b, SSAFloat c);
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static SSAFloat round(SSAFloat val);
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//static SSAFloat round(SSAFloat val);
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static SSAFloat floor(SSAFloat val);
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static SSAFloat MIN(SSAFloat a, SSAFloat b);
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static SSAFloat MAX(SSAFloat a, SSAFloat b);
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