Re: Other Quesa concerns/suggestions

[Stefan H. <st...@to...>]

At least nan, inf, etc. do not work (correctly) when __FAST_MATH__ is on.

>gcc's man page says:
>
>"-ffast-math
>Sets -fno-math-errno, -funsafe-math-optimizations, -fno-trapping-math, -
>ffinite-math-only, -fno-rounding-math, -fno-signaling-nans and fcx-
>limited-range.
>This option causes the preprocessor macro "__FAST_MATH__" to be defined.
>
>This option should never be turned on by any -O option since it can
>result in incorrect output for programs which depend on an exact
>implementation of IEEE or ISO rules/specifications for math functions."
>
>I agree 'fast' sounds like a recommendation, they probably should have
>called it GCC_BROKEN_MATH. :)

   Stefan
   http://www.topoi.ch