[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
## Re: Puzzling behaviour of `isnan' with -ffast-math

**From**: |
Lionel B |

**Subject**: |
Re: Puzzling behaviour of `isnan' with -ffast-math |

**Date**: |
Thu, 3 Jul 2008 15:21:35 +0000 (UTC) |

**User-agent**: |
Pan/0.132 (Waxed in Black) |

On Thu, 03 Jul 2008 15:18:38 +0200, Bernd Strieder wrote:
>* Hello,*
>* *
>* Lionel B wrote:*
>* *
>*> Is this just because all bets are off with -ffast-math (i.e. undefined*
>*> behaviour) or is there a problem here?*
>* *
>* See the docs (info pages):*
>* *
>* `-ffinite-math-only'*
>* Allow optimizations for floating-point arithmetic that assume that*
>* arguments and results are not NaNs or +-Infs.*
>* *
>* `-ffast-math'*
>* Sets `-fno-math-errno', `-funsafe-math-optimizations',*
>* `-ffinite-math-only', `-fno-rounding-math', `-fno-signaling-nans'*
>* and `-fcx-limited-range'.*
>* *
Right, should have RTFM.
Thanks,
--
Lionel B