Comment # 34
on bug 89069
from Daniel Scharrer
(In reply to smoki from comment #28) > After > http://cgit.freedesktop.org/mesa/mesa/commit/ > ?id=c6d79ed289a75f13c65f011be870f7e43a0fedc7 which improve code quality i > can enable unsafe-fp-math and grass is now there with trace from Comment 7 > > Daniel and others, you might want to recheck this. I can confirm that there is still grass with Mesa git-e1ae0c3 + LLVM r236436 and diff --git a/src/gallium/drivers/radeon/radeon_llvm_emit.c.old b/src/gallium/drivers/radeon/radeon_llvm_emit.c index 624077c..0f9dbab 100644 --- a/src/gallium/drivers/radeon/radeon_llvm_emit.c.old +++ b/src/gallium/drivers/radeon/radeon_llvm_emit.c @@ -80,6 +80,10 @@ void radeon_llvm_shader_type(LLVMValueRef F, unsigned type) sprintf(Str, "%1d", llvm_type); LLVMAddTargetDependentFunctionAttr(F, "ShaderType", Str); + + if (type != TGSI_PROCESSOR_COMPUTE) { + LLVMAddTargetDependentFunctionAttr(F, "unsafe-fp-math", "true"); + } } I still get GPU faults with The Talos Principle, even with "unsafe-fp-math" enabled now - although not with either of the traces I posted. I also get some garbage rendered / flickering stuff, but I don't think it's related to "unsafe-fp-math". I'll test more and post a new trace when I have time.
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