Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 9/27/83; site hplabsc.UUCP Path: utzoo!watmath!clyde!burl!ulysses!mhuxr!mhuxt!houxm!whuxl!whuxlm!harpo!decvax!ittvax!dcdwest!sdcsvax!sdcrdcf!hplabsc!dsmith From: dsmith@hplabsc.UUCP (David Smith) Newsgroups: net.micro,net.micro.68k,net.micro.16k Subject: Re: Floating Point Comparisons Message-ID: <2529@hplabsc.UUCP> Date: Wed, 17-Apr-85 12:37:57 EST Article-I.D.: hplabsc.2529 Posted: Wed Apr 17 12:37:57 1985 Date-Received: Fri, 19-Apr-85 01:41:16 EST References: <133@cfa.UUCP> <6370@boring.UUCP> <2574@nsc.UUCP> <227@osiris.UUCP> <6383@boring.UUCP> Distribution: net Organization: Hewlett Packard Labs, Palo Alto CA Lines: 4 Xref: watmath net.micro:10078 net.micro.68k:723 net.micro.16k:320 The Pdp-11/60 floating point unit uses a (replicated?) lookup table for its multiplier. Several chunks of result are fed through an adder tree. Many of the product chunks can be laid end-to-end, so the adder tree doesn't require too many inputs.