[llvm-dev] Speculative FP operation.

[Kevin P. Neal via llvm-dev]

On Wed, Jan 12, 2022 at 03:16:54PM +0000, Florian Hahn via llvm-dev wrote:
> Hi,
> 
> > On Jan 12, 2022, at 04:50, Umesh Kalappa via llvm-dev <llvm-dev at lists.llvm.org> wrote:
> > 
> > Hi All,
> > 
> > Did someone tried enabling the trapping math for the aarch64 arch ?
> > So that we can surpass the transformation  like below.
> > 
> 
> As far as I know, initial trapping math support only existing for X86 at the moment.

X86, PowerPC, SystemZ.

I believe PowerPC is the only target that properly handles dynamic rounding
mode, where instructions don't get moved past a call instruction since we
don't know if the rounding mode will be changed. I might have missed the
fix for the other targets, though.
-- 
Kevin P. Neal                                http://www.pobox.com/~kpn/

Seen on bottom of IBM part number 1887724:
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