Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 6/24/83 (MC840302); site zuring.UUCP Path: utzoo!watmath!clyde!cbosgd!ihnp4!mhuxn!mhuxr!ulysses!allegra!mit-eddie!think!harvard!seismo!mcvax!zuring!dik From: dik@zuring.UUCP Newsgroups: net.lang.c Subject: Re: More Naughty Bits Message-ID: <236@zuring.UUCP> Date: Wed, 21-Aug-85 19:00:30 EDT Article-I.D.: zuring.236 Posted: Wed Aug 21 19:00:30 1985 Date-Received: Sat, 24-Aug-85 17:15:56 EDT References: <575@brl-tgr.ARPA> <132@rtp47.UUCP> <387@uwmcsd1.UUCP> <944@security.UUCP> Reply-To: dik@zuring.UUCP (Dik T. Winter) Distribution: net Organization: CWI, Amsterdam Lines: 12 Apparently-To: rnews@mcvax.LOCAL In article <944@security.UUCP> jjg@security.UUCP (Jeff Glass) writes: >> (discussion about machines where 0.0 does not have same representation as 0) > >The CDC Cyber series represents floating-point zero with the (12-bit) >exponent zero. It doesn't matter whether the (48-bit) mantissa is zero >or not. Not quite, for floating-point multiplication: yes; for floating-point addition: no. (There are numbers such that 2.0*x = 0.0, but x+x /= 0.0) -- dik t. winter, cwi, amsterdam, nederland UUCP: {seismo|decvax|philabs}!mcvax!dik