Wed, 23 Oct 2013 13:47:10 -0700 (PDT)

Related articles |
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Compiler optimization and floating point operations abidmuslim@gmail.com (Abid) (2013-10-23) |

Re: Compiler optimization and floating point operations cameron.mcinally@nyu.edu (Cameron McInally) (2013-10-23) |

Re: Compiler optimization and floating point operations gah@ugcs.caltech.edu (glen herrmannsfeldt) (2013-10-24) |

Re: Compiler optimization and floating point operations gneuner2@comcast.net (George Neuner) (2013-10-24) |

Re: Compiler optimization and floating point operations jm@bourguet.org (Jean-Marc Bourguet) (2013-10-24) |

Re: Compiler optimization and floating point operations sgk@troutmask.apl.washington.edu (Steven G. Kargl) (2013-10-24) |

Re: Compiler optimization and floating point operations gneuner2@comcast.net (George Neuner) (2013-10-24) |

[4 later articles] |

From: | Abid <abidmuslim@gmail.com> |

Newsgroups: | comp.compilers |

Date: | Wed, 23 Oct 2013 13:47:10 -0700 (PDT) |

Organization: | Compilers Central |

Keywords: | arithmetic, optimize, question |

Posted-Date: | 23 Oct 2013 21:09:45 EDT |

Hi All:

Does back end compiler optimizations affect the floating point

accuracy? Is there any research work in this area?

Thanks,

Abid

[The answer to the first question is "sometimes", and there has been a

great deal of work in this area going back to the 1960s. I know IBM

Fortran compilers that carefully preserve bit identical results in

regular and optimized code, and I know other compilers that freely

use all of the mathematical (but not arithmetic) equivalences that

Fortran allows. -John]

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