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From: "jsm28 at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug math/15268] exp (-7.4444006192138124e+02) missing underflow
Date: Tue, 03 Dec 2013 00:36:00 -0000	[thread overview]
Message-ID: <bug-15268-131-p0ETbU8szJ@http.sourceware.org/bugzilla/> (raw)
In-Reply-To: <bug-15268-131@http.sourceware.org/bugzilla/>

https://sourceware.org/bugzilla/show_bug.cgi?id=15268

Joseph Myers <jsm28 at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|Default SET_RESTORE_ROUND   |exp
                   |implementation hold         |(-7.4444006192138124e+02)
                   |exceptions                  |missing underflow

--- Comment #2 from Joseph Myers <jsm28 at gcc dot gnu.org> ---
I don't see that there's a bug in SET_RESTORE_ROUND here; libc_feresetround
calls feupdateenv which should cause any exceptions that were raised after
SET_RESTORE_ROUND to generate corresponding traps.  It looks like the exp call
only generates exact underflow but not inexact, even though this is a case of
an inexact result; that's a bug in exp (and applies on x86_64 as well).

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  parent reply	other threads:[~2013-12-03  0:36 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-03-11 13:35 [Bug math/15268] New: Default SET_RESTORE_ROUND implementation hold exceptions azanella at linux dot vnet.ibm.com
2013-03-11 20:04 ` [Bug math/15268] " azanella at linux dot vnet.ibm.com
2013-12-03  0:36 ` jsm28 at gcc dot gnu.org [this message]
2013-12-03 21:50 ` [Bug math/15268] exp (-7.4444006192138124e+02) missing underflow cvs-commit at gcc dot gnu.org
2013-12-03 21:51 ` jsm28 at gcc dot gnu.org
2014-06-13 10:10 ` fweimer at redhat dot com

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