llvm dev - Jul 2020 - [FPEnv][AArch64] Constrained FP this year?

Does anyone have any plans on working on constrained floating-point for the
AArch64 backend this year? We're willing to help out with the work as we
can, and coordinating effort is a good thing. Anyone?
--
Kevin P. Neal
SAS/C and SAS/C++ Compiler
Compute Services
SAS Institute, Inc.




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I have intention to implement some functionality on AArch64:
- setting rounding mode (as for x86 in https://reviews.llvm.org/D74730),
- getting/setting FP environment (as for x86 in
https://reviews.llvm.org/D81833),
- getting/setting FP control modes (as for x86 in
https://reviews.llvm.org/D83036),
- lowering of llvm.roundeven.
I don't know if I actually would have time for these tasks. I would
appreciate coordination with other interested parties on this topic.

Thanks,
--Serge


On Wed, Jul 22, 2020 at 2:12 AM Kevin Neal via llvm-dev <
llvm-dev at lists.llvm.org> wrote:
> Does anyone have any plans on working on constrained floating-point for
> the AArch64 backend this year? We’re willing to help out with the work as
> we can, and coordinating effort is a good thing. Anyone?
> --
> Kevin P. Neal
> SAS/C and SAS/C++ Compiler
> Compute Services
> SAS Institute, Inc.
>
>
>
>
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>
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I gave the talk and proof of concept on using portable SIMD for libmvec at the
last LLVM dev mtg[1] and pointed out that this could support constrained
rounding modes (which the original libmvec spec leaves out, but is now in
LLVM's language ref). My work on this stopped after the conference and
nobody wanted to pay me, but I would be available for consulting on
this.<div><br /></div><div>Shawn Landden<br
/><div><br
/></div><div>[1]  https://youtu.be/CRSmOlCxHZE<br /><br
/></div></div>23:12, 21 июля 2020 г., "Kevin Neal via
llvm-dev" <llvm-dev@lists.llvm.org>:<br /><blockquote
class="210e7a848e8fcb45wmi-quote">
<font face="Courier New" size="2"><span
style="font-size:11pt">
<div>Does anyone have any plans on working on constrained floating-point
for the AArch64 backend this year? We’re willing to help out with the work as we
can, and coordinating effort is a good thing. Anyone?</div>
<div><font face="Calibri" size="2"><span
style="font-size:10pt">--<font size="2"><span
style="font-size:11pt">
<br />

</span></font><font face="Courier New">Kevin P.
Neal<br />

</font><font face="Courier New">SAS/C and SAS/C++
Compiler</font></span></font></div>
<div><font size="2"><span
style="font-size:10pt">Compute
Services</span></font></div>
<div><font size="2"><span
style="font-size:10pt">SAS Institute,
Inc.</span></font></div>
<div><font face="Calibri"> </font></div>
<div><font face="Calibri"> </font></div>
<div><font face="Calibri"> </font></div>
<div><font face="Calibri"> </font></div>
</span></font>

<p>_______________________________________________<br />LLVM
Developers mailing list<br /><a
href="mailto:llvm-dev@lists.llvm.org">llvm-dev@lists.llvm.org</a><br
/><a
href="https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev">https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev</a><br
/></p></blockquote><br /><br />-- <br />Shawn
Landden