From: Segher Boessenkool <segher@kernel.crashing.org>
To: HAO CHEN GUI <guihaoc@linux.ibm.com>
Cc: gcc-patches <gcc-patches@gcc.gnu.org>, David <dje.gcc@gmail.com>,
"Kewen.Lin" <linkw@linux.ibm.com>,
Peter Bergner <bergner@linux.ibm.com>
Subject: Re: [PATCH v4, rs6000] Implemented f[min/max]_optab by xs[min/max]dp [PR103605]
Date: Thu, 9 Jun 2022 10:07:59 -0500 [thread overview]
Message-ID: <20220609150759.GP25951@gate.crashing.org> (raw)
In-Reply-To: <3e038980-615e-b465-d2a0-010ba1205fe0@linux.ibm.com>
On Thu, Jun 09, 2022 at 09:24:00AM +0800, HAO CHEN GUI wrote:
> On 8/6/2022 下午 9:24, Segher Boessenkool wrote:
> > But it regresses the code quality generated with -ffast-math (because
> > the new unspecs arent't optimised like standard rtl is). This can be
> > follow-up work of course -- and the best direction is to make fmin/fmax
> > generic, even! :-)
>
> fmin/max will be folded to MIN/MAX_EXPR when fast-math is set. So the
> behavior doesn't change when fast-math is set.
Ah, good. Should we then have an assert that there is no fast-math if
we ever get the rtl fmin/fmax stuff?
Segher
next prev parent reply other threads:[~2022-06-09 15:09 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-08 3:28 HAO CHEN GUI
2022-06-08 7:44 ` Kewen.Lin
2022-06-08 13:24 ` Segher Boessenkool
2022-06-09 1:24 ` HAO CHEN GUI
2022-06-09 15:07 ` Segher Boessenkool [this message]
2022-06-10 0:47 ` HAO CHEN GUI
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