20 May 1999 01:53:26 -0400

Related articles |
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[7 earlier articles] |

Re: Rounding with Div and Mod operators cdg@nullstone.com (Christopher Glaeser) (1999-05-16) |

Re: Rounding with Div and Mod operators johan.persson@mbox319.swipnet.se (Johan Persson) (1999-05-16) |

Re: Rounding with Div and Mod operators genew@shuswap.net (1999-05-20) |

Re: Rounding with Div and Mod operators sofkam@rpi.edu (1999-05-20) |

Re: Rounding with Div and Mod operators drh@microsoft.com (Dave Hanson) (1999-05-20) |

Re: Rounding with Div and Mod operators anton@mips.complang.tuwien.ac.at (1999-05-20) |

Re: Rounding with Div and Mod operators peter.r.wilson@boeing.com (Peter Wilson) (1999-05-20) |

Re: Rounding with Div and Mod operators mfinney@lynchburg.net (1999-05-21) |

Re: Rounding with Div and Mod operators jmoore@softmoore.com (John I. Moore, Jr.) (1999-05-22) |

Re: Rounding with Div and Mod operators lassehp@imv.au.dk (1999-05-22) |

Re: Rounding with Div and Mod operators r_barton1@hotmail.com (Barton) (1999-05-22) |

Re: Rounding with Div and Mod operators r_barton1@hotmail.com (Barton) (1999-05-27) |

Re: Rounding with Div and Mod operators ucapjab@ucl.ac.uk (Jonathan Barker) (1999-05-27) |

From: | Peter Wilson <peter.r.wilson@boeing.com> |

Newsgroups: | comp.compilers |

Date: | 20 May 1999 01:53:26 -0400 |

Organization: | The Boeing Company |

References: | 99-05-039 |

Keywords: | arithmetic |

William Rayer wrote:

*>*

*> I'm writing a compiler for a new language which is to include the*

*> integer division and integer remainder operators (div and mod). I have*

*> some questions about the way these operators do rounding with negative*

*> operands and would appreciate any feedback.*

<snip>

Knuth discusses these in Volume 1 (I don't have a copy to hand, but

I think its about a quarter of the way through).

You might also want to look up: Raymond T. Boute, "The Euclidean

Definition of the Functions div and mod", ACM TOPLAS, 14(2):127-144,

April 1992.

There is also some discussion on the implementation of these and

related mathematical operators in the ISO standard (ISO 10301-11:1994)

EXPRESS language at

http://www.nist.gov/sc4/wg_qc/wg11/express/tecpaper/expstdl.htm

Peter W.

peter.r.wilson@boeing.com

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