[PATCH] D113543: [RISCV] Add inline expansion for vector ftrunc/fceil/ffloor.

[Craig Topper via Phabricator via llvm-commits]

craig.topper added subscribers: aqjune, nlopes.
craig.topper added a comment.

In D113543#3124895 <https://reviews.llvm.org/D113543#3124895>, @jrtc27 wrote:

> In D113543#3124872 <https://reviews.llvm.org/D113543#3124872>, @craig.topper wrote:
>
>> I just tried to use alive2 with nsz to avoid caring about the sign of -0.0, but I'm getting a poison value where I don't think I should. https://alive2.llvm.org/ce/z/mtnitt
>
> Playing with https://alive2.llvm.org/ce/z/j8SJkv is giving really strange results. It thinks fptosi of -1.25 and -1.0 both give -1, and that -0.0 gives 0, but thinks -0.25 gives poison. That's surely wrong per the definition of fptosi? I could vaguely understand it if it also viewed -0.0 as giving poison, but it doesn't...

@aqjune or @nlopes can you help with the alive2 behavior here?


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https://reviews.llvm.org/D113543