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gl_shader_decompiler: Improve generated code in HMergeH* 

Avoiding bitwise expressions, this fixes Turing issues in shaders using
half float merges that affected several games.
This commit is contained in:
ReinUsesLisp 2020-04-12 05:06:55 -03:00
parent 75e39f7f88
commit 75eb953575
1 changed files with 8 additions and 6 deletions
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14
src/video_core/renderer_opengl/gl_shader_decompiler.cpp
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@ -1819,15 +1819,17 @@ private:
} }
Expression HMergeH0(Operation operation) { Expression HMergeH0(Operation operation) {
std::string dest = VisitOperand(operation, 0).AsUint(); const std::string dest = VisitOperand(operation, 0).AsUint();
std::string src = VisitOperand(operation, 1).AsUint(); const std::string src = VisitOperand(operation, 1).AsUint();
return {fmt::format("(({} & 0x0000FFFFU) | ({} & 0xFFFF0000U))", src, dest), Type::Uint}; return {fmt::format("vec2(unpackHalf2x16({}).x, unpackHalf2x16({}).y)", src, dest),
Type::HalfFloat};
} }
Expression HMergeH1(Operation operation) { Expression HMergeH1(Operation operation) {
std::string dest = VisitOperand(operation, 0).AsUint(); const std::string dest = VisitOperand(operation, 0).AsUint();
std::string src = VisitOperand(operation, 1).AsUint(); const std::string src = VisitOperand(operation, 1).AsUint();
return {fmt::format("(({} & 0x0000FFFFU) | ({} & 0xFFFF0000U))", dest, src), Type::Uint}; return {fmt::format("vec2(unpackHalf2x16({}).x, unpackHalf2x16({}).y)", dest, src),
Type::HalfFloat};
} }
Expression HPack2(Operation operation) { Expression HPack2(Operation operation) {