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andrelct
2008 May 27
1
[LLVMdev] Float compare-for-equality andselect optimizationopportunity
Hi Marc,
I'm a bit confused. Isn't the standard compare (i.e. the one for a language
like C) an ordered one? I tried converting some C code to LLVM C++ API code
with the online demo, and it uses FCMP_OEQ.
No, if you have:
x = NaN
y = NaN
then the comparison:
(x == y) is false.
Which is what your seeing from your first post and is the standard IEEE
expected behavior.