Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.2 9/18/84; site ucbvax.ARPA
Path: utzoo!watmath!clyde!burl!ulysses!ucbvax!info-vax
From: info-vax@ucbvax.ARPA
Newsgroups: fa.info-vax
Subject: Re: speed of single/double precision calculations
Message-ID: <3519@ucbvax.ARPA>
Date: Wed, 28-Nov-84 04:21:10 EST
Article-I.D.: ucbvax.3519
Posted: Wed Nov 28 04:21:10 1984
Date-Received: Thu, 29-Nov-84 02:03:23 EST
Sender: daemon@ucbvax.ARPA
Organization: University of California at Berkeley
Lines: 13

From: decvax!mcnc!rti-sel!trt@BERKELEY

Uhm, what computer/language were you using to time your code?
The Gould C/f77 compilers use single-precision arithmetic
on single-precision variables.
Most other compilers to all f.p. arithmetic in double
which means there is alot of float->double...arith...double->float
conversion which makes double precision variables look attractive!

The original definition of C was that all f.p. arithmetic
be in double precision, though the proposed standard
permits the Gould interpretation.
	Tom Truscott