Hi,
the man page fma.3 says in release 3.22:
DESCRIPTION
The fma() function computes x * y + z. The result is rounded as one
ternary operation according to the current rounding mode (see fenv(3)).
However, this is wrong on most current architectures (which do not have a
hardware fma). See http://sourceware.org/bugzilla/show_bug.cgi?id=3268.
Since glibc bug #3268 is still unresolved after 4 years, it would be good to
mention on the man page that fma() might return (x*y)+z with two roundings.
Paul Zimmermann
PS: I am using Fedora 12.
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