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* invoke.texi: Document __FAST_MATH__.

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From-SVN: r40249
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Brad Lucier 2001-03-05 23:50:06 +00:00 committed by Neil Booth
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@ -1,3 +1,7 @@
2001-03-05 Brad Lucier <lucier@math.purdue.edu>
* invoke.texi: Document __FAST_MATH__.
2001-03-05 Kaveh R. Ghazi <ghazi@caip.rutgers.edu>
* crtstuff.c: Restore include of auto-host.h.

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@ -2940,6 +2940,8 @@ example, it allows the compiler to assume arguments to the @code{sqrt}
function are non-negative numbers and that no floating-point values
are NaNs.
This option causes the preprocessor macro __FAST_MATH__ to be defined.
This option should never be turned on by any @samp{-O} option since
it can result in incorrect output for programs which depend on
an exact implementation of IEEE or ISO rules/specifications for