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Date: Wed, 31 Jul 2019 14:47:00 -0000
From: Segher Boessenkool <segher@kernel.crashing.org>
To: Tejas Joshi <tejasjoshi9673@gmail.com>
Cc: gcc@gcc.gnu.org, Martin Jambor <mjambor@suse.cz>, joseph@codesourcery.com
Subject: Re: Expansion of narrowing math built-ins into power instructions
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References: <ri6imrkzqq6.fsf@suse.cz> <87sgqnx4i6.fsf@oldenburg2.str.redhat.com> <alpine.DEB.2.21.1907301947090.10734@digraph.polyomino.org.uk> <CACMrGjBiEMp7jj=b30MQ-8SMYoPA_4BFTdQRQSbV7WkYmv+Opg@mail.gmail.com>
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On Wed, Jul 31, 2019 at 12:23:18PM +0530, Tejas Joshi wrote:
> > In GCC (in rs6000.md) we have the "*add<mode>3_fpr" and similar insns,
> > which could be extended to allow DF inputs with an SF output; it doesn't
> > yet allow it.
> 
> Thanks for the inputs, I will try to address these points now. I have
> built GCC on gcc112 and will apply patch and test testcases there.

For the QP float (binary128, KFmode, take your pick) you need Power9 or
newer, so gcc135.


Segher