From: Adam Sampson <ats@offog.org>
To: Alejandro Colomar <alx@kernel.org>
Cc: Helge Kreutzmann <debian@helgefjell.de>,
mario.blaettermann@gmail.com, linux-man@vger.kernel.org
Subject: Re: Issue in man page fma.3
Date: Mon, 01 Sep 2025 16:06:34 +0100 [thread overview]
Message-ID: <y2ajz2ii551.fsf@offog.org> (raw)
In-Reply-To: <cydmigk4amlt62bjeircdfzgjzajlsoaw6pje6z5te7fu4a7bd@upahclev5v3s> (Alejandro Colomar's message of "Mon, 1 Sep 2025 09:47:29 +0200")
Alejandro Colomar <alx@kernel.org> writes:
>> Issue: According to above, a domain error also occurs when I<z> is a NaN?
> According to what exactly? I don't understand this report.
fma.3's RETURN VALUE section currently says:
| If one of x or y is an infinity, the other is 0, and z is not a NaN, a
| domain error occurs, and a NaN is returned.
|
| If one of x or y is an infinity, and the other is 0, and z is a NaN, a
| domain error occurs, and a NaN is returned.
But the ERRORS section only says a domain error occurs in the first
case. If I'm understanding the glibc code for _FP_FMA in
soft-fp/op-common.h correctly, it looks like it raises the error
regardless of the value of z, so in both sections the "and z is ..."
part could be removed, making the two sentences above identical?
--
Adam Sampson <ats@offog.org> <http://offog.org/>
next prev parent reply other threads:[~2025-09-01 15:06 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-08-24 14:48 Issue in man page fma.3 Helge Kreutzmann
2025-09-01 7:47 ` Alejandro Colomar
2025-09-01 15:06 ` Adam Sampson [this message]
2025-09-01 15:28 ` Alejandro Colomar
-- strict thread matches above, loose matches on Subject: below --
2025-12-24 14:38 Helge Kreutzmann
2025-12-25 13:29 ` Alejandro Colomar
2025-12-26 4:49 ` Helge Kreutzmann
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