-ffast-math and mathinlines.h

[Mark Kettenis]

   From: Andreas Jaeger <aj@oss.sgi.com>
   Date: 15 Apr 2000 21:53:34 -0700

   --- libc-clean/manual/math.texi	Sun Oct 31 09:19:58 1999
   +++ glibc-2.2/manual/math.texi	Sat Apr 15 20:09:59 2000
   @@ -1770,9 +1770,10 @@
    can increase the speed of generated code significantly.  The drawback is
    that code size will increase, and the increase is not always negligible.

   -The speed increase has one drawback: the inline functions might not set
   -@code{errno} and might not have the same precission as the library
   -functions.
   +There are two kind of inline functions: Those that give the same result
   +as the library functions and others that might not set @code{errno} and
   +might not have the same precission as the library functions.  The latter
   +are only available if the flag @code{-ffast-math} is given to GNU CC.

Apart from the obvious misspelling (precission), the bit

   [Others that] might not have the same precision as the library
   functions.

is a bit vague.  This probably raises the question: what gives the
best precision?  Is there an easy answer to this?

A cross-reference to the GCC manual would be nice too :-).

Mark