Displaying 2 results from an estimated 2 matches for "8217b86a".
2018 Aug 29
2
[FPEnv] FNEG instruction
> On Aug 29, 2018, at 1:22 PM, Cameron McInally via llvm-dev <llvm-dev at lists.llvm.org> wrote:
>
> FSUB(-0.0, NaN) = NaN
> FSUB(-0.0, -NaN) = NaN
Some specific architecture may define this, or APFloat might, but IEEE 754 does not interpret the sign of NaN except in four operations (copy, abs, negate, copysign), so it doesn’t say anything about these.
– Steve
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2018 Aug 30
4
[FPEnv] FNEG instruction
...tested the FSUB hardware
instruction on all the targets I care about and they all respect the sign
on NaNs. I'm not sure how this got into my head...
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