From: Joseph Myers <joseph@codesourcery.com>
To: Jakub Jelinek <jakub@redhat.com>
Cc: Aldy Hernandez <aldyh@redhat.com>, GCC patches <gcc-patches@gcc.gnu.org>
Subject: Re: [PATCH] Add support for floating point endpoints to frange.
Date: Tue, 30 Aug 2022 22:32:54 +0000 [thread overview]
Message-ID: <alpine.DEB.2.22.394.2208302231260.446383@digraph.polyomino.org.uk> (raw)
In-Reply-To: <YwzFLYacJF3UOsy4@tucnak>
On Mon, 29 Aug 2022, Jakub Jelinek via Gcc-patches wrote:
> On Mon, Aug 29, 2022 at 03:45:33PM +0200, Aldy Hernandez wrote:
> > For convenience, singleton_p() returns false for a NAN. IMO, it makes
> > the implementation cleaner, but I'm not wed to the idea if someone
> > objects.
>
> If singleton_p() is used to decide whether one can just replace a variable
> with singleton range with a constant, then certainly.
> If MODE_HAS_SIGNED_ZEROS, zero has 2 representations (-0.0 and 0.0) and
Note also for decimal floating point that many real numbers - if they
don't require the full precision of the type to represent the number - can
be represented with different quantum exponents (so compare equal but
can't be used to replace each other).
--
Joseph S. Myers
joseph@codesourcery.com
next prev parent reply other threads:[~2022-08-30 22:33 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-23 11:42 Aldy Hernandez
2022-08-26 15:55 ` Aldy Hernandez
2022-08-26 17:40 ` Andrew Pinski
2022-08-26 18:11 ` Aldy Hernandez
2022-08-26 18:11 ` Aldy Hernandez
2022-08-26 19:16 ` Aldy Hernandez
2022-08-26 19:44 ` Andrew Pinski
2022-08-29 13:45 ` Aldy Hernandez
2022-08-29 13:54 ` Jakub Jelinek
2022-08-29 14:07 ` Toon Moene
2022-08-29 14:15 ` Aldy Hernandez
2022-08-29 14:30 ` Toon Moene
2022-08-29 14:36 ` Aldy Hernandez
2022-08-29 14:42 ` Toon Moene
2022-08-30 9:27 ` Aldy Hernandez
2022-08-31 15:22 ` Jeff Law
2022-08-31 15:19 ` Jeff Law
2022-08-29 14:08 ` Aldy Hernandez
2022-08-29 14:17 ` Jakub Jelinek
2022-08-29 14:20 ` Aldy Hernandez
2022-08-29 14:27 ` Jakub Jelinek
2022-08-29 14:30 ` Aldy Hernandez
2022-08-31 15:24 ` Jeff Law
2022-08-30 22:32 ` Joseph Myers [this message]
2022-08-31 15:16 ` Jeff Law
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