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[Bug math/13304] fma, fmaf, fmal produce wrong results
- From: "jakub at redhat dot com" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sources dot redhat dot com
- Date: Mon, 17 Oct 2011 09:27:50 +0000
- Subject: [Bug math/13304] fma, fmaf, fmal produce wrong results
- Auto-submitted: auto-generated
- References: <bug-13304-131@http.sourceware.org/bugzilla/>
http://sourceware.org/bugzilla/show_bug.cgi?id=13304
--- Comment #22 from Jakub Jelinek <jakub at redhat dot com> 2011-10-17 09:27:50 UTC ---
I've done quite a lot of testing on it back when it was added to glibc, see
e.g. the
http://sources.redhat.com/ml/libc-alpha/2010-10/txt00000.txt
testcase (which has been tweaked for the other floating point formats (float,
80-bit long double, 128-bit long double).
Yes, math/s_fma*.c won't DTRT, they are just fallback implementations for
architectures without sufficient exception support (the real implementations
rely on exceptions working properly and various fenv.h functions being
available).
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