Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 6/24/83; site utastro.UUCP Path: utzoo!watmath!clyde!burl!ulysses!allegra!mit-eddie!godot!harvard!seismo!ut-sally!utastro!nather From: nather@utastro.UUCP (Ed Nather) Newsgroups: net.micro.68k,net.micro Subject: Re: MC68881 Floating-point performance times Message-ID: <896@utastro.UUCP> Date: Mon, 10-Dec-84 10:41:21 EST Article-I.D.: utastro.896 Posted: Mon Dec 10 10:41:21 1984 Date-Received: Wed, 12-Dec-84 04:17:42 EST References: <263@oakhill.UUCP> Organization: UTexas Astronomy Dept., Austin, Texas Lines: 16 Xref: watmath net.micro.68k:481 net.micro:8874 [-+-- begone!] Perhaps the most interesting thing about these timings is that there is essentially NO PENALTY IN USING DOUBLE vs SINGLE PRECISION in the basic floating point operations. There has been much discussion on the net about whether the C language is flawed because is specifies that all floating operations be done in double precision, despite the "obvious gain in speed" that would result in using single precision operations where they offer enough precision. Looks like it just depends on whose chip you use. -- Ed Nather {allegra,ihnp4}!{ut-sally,noao}!utastro!nather Astronomy Dept., U. of Texas, Austin