Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!cs.utexas.edu!samsung!think!paperboy!meissner From: meissner@osf.org (Michael Meissner) Newsgroups: comp.lang.c Subject: Re: IEEE arithmetic in C Message-ID: Date: 4 May 90 21:47:30 GMT References: <4328.263076F2@puddle.fidonet.org> <1990Apr25.162502.5977@utzoo.uucp> <1990Apr26.203555.9810@kfw.COM> <1990Apr27.173218.19870@utzoo.uucp> <272@garth.UUCP> Sender: news@OSF.ORG Organization: Open Software Foundation Lines: 24 In-reply-to: dneff@garth.UUCP's message of 4 May 90 01:42:26 GMT In article <272@garth.UUCP> dneff@garth.UUCP (David Neff) writes: | Not being a Sun expert, I'm limiting my comments to the IEEE spec. | | In article <1990Apr27.173218.19870@utzoo.uucp> henry@utzoo.uucp (Henry Spencer) writes: | >(1) Where's the support for extended-format variables? | > | >(2) Where's the support for extended format *at all* with the high-speed | > floating-point add-ons? Extended format is not optional in IEEE! | | If I'm not mistaken, extended precision is not required for IEEE | conformance. And in any case, double precision is a perfectly | conforming representation for single extended. If it were otherwise, then the MIPS and 88k implementations would be illegal, since they only have single and double precision. It's been a long time, since I read 754, but I can't recall where it talks about the format of any but single and double precisions. -- Michael Meissner email: meissner@osf.org phone: 617-621-8861 Open Software Foundation, 11 Cambridge Center, Cambridge, MA Catproof is an oxymoron, Childproof is nearly so