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[Bug math/13304] fma, fmaf, fmal produce wrong results


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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