This is the mail archive of the
glibc-bugs@sourceware.org
mailing list for the glibc project.
[Bug math/3268] fma for all targets without hardware fma instructions is incorrect.
- From: "nbowler at draconx dot ca" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sources dot redhat dot com
- Date: 2 Feb 2010 21:56:11 -0000
- Subject: [Bug math/3268] fma for all targets without hardware fma instructions is incorrect.
- References: <20060926212234.3268.sjmunroe@us.ibm.com>
- Reply-to: sourceware-bugzilla at sourceware dot org
------- Additional Comments From nbowler at draconx dot ca 2010-02-02 21:56 -------
Created an attachment (id=4569)
--> (http://sourceware.org/bugzilla/attachment.cgi?id=4569&action=view)
Example demonstrating fma failure on x86_64
The fma function is still incorrect on x86_64 (with glibc version 2.11) when
the multiplication overflows but the final result would not: the result is an
infinity instead of the rounded true result.
See the attached C program for a demonstration.
--
http://sourceware.org/bugzilla/show_bug.cgi?id=3268
------- You are receiving this mail because: -------
You are on the CC list for the bug, or are watching someone who is.