Path: utzoo!attcan!uunet!lll-winken!lll-tis!ames!ucsd!rutgers!bellcore!tness7!tness1!sugar!ficc!peter
From: peter@ficc.uu.net (Peter da Silva)
Newsgroups: comp.lang.fortran
Subject: Re: Fortran versus C for numerical analysis
Message-ID: <1421@ficc.uu.net>
Date: 7 Sep 88 19:40:16 GMT
References: <344@quintus.UUCP> <3185@lanl.gov>
Organization: SCADA
Lines: 6

The compiler is free to perform any optimisation it wants, so long as
it doesn't change the result. So (1.0+x)*2.0 can be evaluated as 2+2*x
if that's more efficient. Multiplying by 2 is an exact operation in
binary floating point.
-- 
Peter da Silva  `-_-'  Ferranti International Controls Corporation.
"Have you hugged  U  your wolf today?"            peter@ficc.uu.net