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From: "fx at gnu dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/97142] __builtin_fmod not optimized on POWER
Date: Mon, 21 Sep 2020 14:47:14 +0000	[thread overview]
Message-ID: <bug-97142-4-5i0YxXeQoG@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-97142-4@http.gcc.gnu.org/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97142

--- Comment #5 from Dave Love <fx at gnu dot org> ---
I meant to show that x86_64 expands the built in fmod too.  (I wasn't sure
whether "inline" was the right term, as it seems not to be done by
-finline-functions.)

Yes, xlf -O3 (?) and above imlies something like -ffast-math.  xlf also does
vectorized maths functions, but I don't think the speed of libm is as relevant
as not calling out to it.  (Nothing leapt out from profiles for the rest of
that set to suggest other builtins are similar, but I haven't examined them
closely.)

I'll attach the assembler, which there's an awful lot of compared with x86_64.

  parent reply	other threads:[~2020-09-21 14:47 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-21 10:57 [Bug target/97142] New: " fx at gnu dot org
2020-09-21 11:24 ` [Bug target/97142] " rguenth at gcc dot gnu.org
2020-09-21 11:26 ` rguenth at gcc dot gnu.org
2020-09-21 14:42 ` bergner at gcc dot gnu.org
2020-09-21 14:45 ` fx at gnu dot org
2020-09-21 14:47 ` fx at gnu dot org [this message]
2020-09-21 17:52 ` segher at gcc dot gnu.org
2020-09-21 18:10 ` bergner at gcc dot gnu.org
2020-09-21 19:33 ` segher at gcc dot gnu.org
2020-09-21 21:54 ` bergner at gcc dot gnu.org
2021-04-13  6:24 ` luoxhu at gcc dot gnu.org
2021-04-13 16:26 ` segher at gcc dot gnu.org
2021-05-27  0:54 ` luoxhu at gcc dot gnu.org
2021-09-02 22:05 ` bergner at gcc dot gnu.org
2021-09-02 22:38 ` segher at gcc dot gnu.org
2021-09-03  2:33 ` luoxhu at gcc dot gnu.org
2021-09-07  1:29 ` cvs-commit at gcc dot gnu.org
2021-09-07 17:58 ` bergner at gcc dot gnu.org
2021-09-07 19:34 ` segher at gcc dot gnu.org
2021-09-07 21:20 ` segher at gcc dot gnu.org
2021-09-14  5:33 ` cvs-commit at gcc dot gnu.org
2021-09-14  5:34 ` cvs-commit at gcc dot gnu.org
2021-09-14  5:36 ` luoxhu at gcc dot gnu.org

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