From: FX <fxcoudert@gmail.com>
To: Mikael Morin <morin-mikael@orange.fr>
Cc: Fortran <fortran@gcc.gnu.org>, gcc-patches@gcc.gnu.org
Subject: Re: [PATCH] Fortran 2018 rounding modes changes
Date: Mon, 19 Sep 2022 19:29:47 +0200 [thread overview]
Message-ID: <99C0538F-658C-4A7C-92B9-29E0C38A28CE@gmail.com> (raw)
In-Reply-To: <c6cd7bee-01c1-afee-6520-ae67189f0487@orange.fr>
Hi,
> Hmm, not really convinced, but that's a possible interpretation, I guess.
It seems to me to be in line with the handling of all other IEEE intrinsics: the user is responsible for querying support before calling any relevant routine. I admit that there is no explicit language in the case of the rounding mode, I will try to find time to ask for an official interpretation.
> My sentence was about IEEE_*S*ET_ROUNDING_MODE actually.
> My point that we previously reported an error (at compile time) to a user that would try to pass a radix 10 while we now silently do... something else that was requested (i.e. set the radix 2 rounding mode).
Oh sorry, I see what you mean and you’re totally right. This is an easy improvement, and while I believe it is undefined behaviour in any case, we can easily improve that.
> I think it's worth at least documenting that only radix 2 is supported.
That also makes sense. I’ll propose a patch.
Thanks,
FX
next prev parent reply other threads:[~2022-09-19 17:29 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-31 18:29 FX
2022-08-31 20:42 ` Bernhard Reutner-Fischer
2022-08-31 21:23 ` FX
2022-09-10 10:21 ` FX
2022-09-19 12:26 ` FX
2022-09-19 15:35 ` Mikael Morin
2022-09-19 16:17 ` FX
2022-09-19 17:09 ` Mikael Morin
2022-09-19 17:29 ` FX [this message]
2022-09-21 9:15 ` FX
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