Path: utzoo!attcan!uunet!sco!seanf
From: seanf@sco.COM (Sean Fagan)
Newsgroups: comp.arch
Subject: Re: 1 double or 2 singles
Message-ID: <8688@scolex.sco.COM>
Date: 12 Nov 90 23:09:56 GMT
References: <11054@pt.cs.cmu.edu>
Sender: news@sco.COM
Organization: The Santa Cruz Operation, Inc.
Lines: 17


In article <11054@pt.cs.cmu.edu> lindsay@gandalf.cs.cmu.edu (Donald Lindsay) writes:
>Various defunct (ETA, Cydrome) and extant (Cray) machines have a
>trick, whereby a floating point pipe can deliver one double precision
>result per clock, or else deliver two single precision results per
>clock.

Uhm... not a Cray.  Cray's have one size of fp:  word.  64-bits.  There are
some things you can do (and the hardware helps a little bit, I believe) to
get 128-bit fp numbers, but it's done mostly in software.

-- 
-----------------+
Sean Eric Fagan  | "*Never* knock on Death's door:  ring the bell and 
seanf@sco.COM    |   run away!  Death hates that!"
uunet!sco!seanf  |     -- Dr. Mike Stratford (Matt Frewer, "Doctor, Doctor")
(408) 458-1422   | Any opinions expressed are my own, not my employers'.