Xref: utzoo comp.compilers:1468 comp.lang.fortran:4038 Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!tut.cis.ohio-state.edu!att!att!ima!esegue!compilers-sender From: mcohen@amsaa-seer.brl.mil (Marty Cohen) Newsgroups: comp.compilers,comp.lang.fortran Subject: Re: IEEE 754 vs Fortran arithmetic Summary: What is the intention of signed zero? Keywords: Fortran, arithmetic Message-ID: <1869@amsaa-seer.BRL.MIL> Date: 30 Oct 90 13:16:15 GMT References: <9010230628.AA22160@admin.ogi.edu> <2408@charon.cwi.nl> <1990Oct28.030338.29498@cs.cmu.edu> Sender: compilers-sender@iecc.cambridge.ma.us Reply-To: Marty Cohen Followup-To: comp.compilers Distribution: na Organization: Army Materiel Systems Analysis Activity Lines: 11 Approved: compilers@esegue.segue.boston.ma.us Does IEEE 754 give a purpose for signed zero? I.E., is it to result from underflow? If so, then the -pi, +pi result would be appropriate for atan(-+0,x). -- Marty Cohen mcohen@brl.mil {uunet|rutgers}!brl!mcohen Custom House Rm 800, Phila. PA 19106 (215)597-8377 [IEEE 754 doesn't give much of a rationale for anything, it's pretty short. -John] -- Send compilers articles to compilers@esegue.segue.boston.ma.us {ima | spdcc | world}!esegue. Meta-mail to compilers-request@esegue.