[PATCH] D155908: [RISCV] Use original mask for restoring the original sign instead of from setcc

[Yeting Kuo via Phabricator via llvm-commits]

fakepaper56 added a comment.

In D155908#4521179 <https://reviews.llvm.org/D155908#4521179>, @Jim wrote:

> During lowering rounding operation, it is converted to the absolute value with the mask that is from vp (or all ones mask for unmasked),
> and compare with the largest integer that can be represented exactly. This comparision generates new mask that is used to only convert
> the value less than the largest integer. The end, we copy the sign back to the value that should use the old mask the same with fabs operation.

I think those elements inactive for `SetccMask` are not changed during the truncation and we don't care them.


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  https://reviews.llvm.org/D155908/new/

https://reviews.llvm.org/D155908