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spirv-opt: Add constant folding for more GLSL.std.450 extended instructions - #6983
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s-perron merged 7 commits intoOct 30, 2026
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Sinh, Cosh, Tanh, Asinh, Acosh, Atanh and InverseSqrt.
juliusikkala
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s-perron
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Oct 30, 2026
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Includes constant folding for the following GLSL.std.450 extended instructions: Sinh, Cosh, Tanh, Asinh, Acosh, Atanh, InverseSqrt, Round, Trunc, Floor, Ceil, Fract, FSign, SSign, Radians, Degrees, Step, SmoothStep and Fma. This subset is included mostly because constant folding is fairly trivial to implement for them.
To handle Fma and SmoothStep, there's now
TernaryScalarFoldingRule,FoldTernaryOpandFoldFPTernaryOp. Their implementation is mostly copypasta from the binary equivalents. I also renamedFoldFTranscendentalUnarytoFoldUnaryFloatingPointOperationbecause nothing about it is specific to transcendental functions and this naming is more in line with the already existingFoldUnaryIntegerOperation.Works towards fixing #6981 but does not implement all of it.