From: "Koning, Paul" <Paul.Koning@dell.com>
To: Jeff Law <jeffreyalaw@gmail.com>
Cc: GCC Patches <gcc-patches@gcc.gnu.org>
Subject: Re: [PATCH] [ranger] x == -0.0 does not mean we can replace x with -0.0
Date: Mon, 29 Aug 2022 17:37:19 +0000 [thread overview]
Message-ID: <3556FC77-B935-4C54-934A-FF4297E62F87@dell.com> (raw)
In-Reply-To: <21a88c69-eed3-7b1d-bbb7-15d37e5959fd@gmail.com>
> On Aug 29, 2022, at 1:07 PM, Jeff Law via Gcc-patches <gcc-patches@gcc.gnu.org> wrote:
>
> ...
> I guess we could do specialization based on the input range. So rather than calling "sin" we could call a special one that didn't have the reduction step when we know the input value is in a sensible range.
There's some precedent for that, though for a somewhat different reason: functions like "log1p". And in fact, it would make sense for the optimizer to transform log calls into log1p calls when the range is known to be right for doing so.
paul
next prev parent reply other threads:[~2022-08-29 17:37 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-26 15:46 Aldy Hernandez
2022-08-26 16:40 ` Jakub Jelinek
2022-08-29 13:13 ` Aldy Hernandez
2022-08-29 13:21 ` Jakub Jelinek
2022-08-29 13:31 ` Aldy Hernandez
2022-08-29 14:20 ` Jeff Law
2022-08-29 14:26 ` Aldy Hernandez
2022-08-29 15:08 ` Jeff Law
2022-08-29 15:13 ` Toon Moene
2022-08-29 17:07 ` Jeff Law
2022-08-29 17:37 ` Koning, Paul [this message]
2022-08-29 19:04 ` Toon Moene
2022-08-29 15:29 ` Aldy Hernandez
2022-08-31 10:08 ` Aldy Hernandez
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