Re:Floating point oddity
by tlb on Monday November 11, 2019 @09:59PM
(#21511168)
It works if the compiler can't do constant folding, like so: https://godbolt.org/z/nQDrSW
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Your first line of main is adding -0.0 and -0.0, which is not what I think you intended to show.
Oops, you're right. https://godbolt.org/z/pAwqUA shows it better. Adding a -0 and +0 together in either order gives +0, using the actual x86-64 addsd instruction.