80386 Multiplication Bug

Article View: comp.sys.intel

Article #1622

#1622

From: Sean Eric Fagan
Date: Thu, 02 Jul 1987 20:20

19 lines
1455 bytes

[]
After hearing (here and elsewhere) about the 80386 multiplication bug,
I was hoping someone could tell me more about it.  For example, I know
it shows up in 32-bit multiplies, but how?  What happens?  Can I get
some examples of data with the corresponding wrong answers?
Thank you for your support.

 -----

 Sean Eric Fagan          Office of Computing/Communications Resources
 (213) 852 5742           Suite 2600
 1GTLSEF@CALSTATE.BITNET  5670 Wilshire Boulevard
                          Los Angeles, CA 90036
{litvax, rdlvax, psivax, hplabs, ihnp4}!csun!{aeusesef,titan!eectrsef}
--------------------------------------------------------------------------------
My employers do not endorse my   | "I may be slow,  but I'm not  stupid.
opinions,  and, at least in my   |  I can count up to five *real* good."
preference  of Unix,  heartily   |      The Great Skeeve
disagree.                        |      (Robert Asprin)

Technical Details

Message-ID: <657@csun.UUCP>

Path: arc1-ca.pugleaf.net!utzoo!mnetor!seismo!rutgers!ucla-cs!sdcrdcf!psivax!csun!aeusesef

Show Full Headers

Complete Article Headers

Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: arc1-ca.pugleaf.net!utzoo!mnetor!seismo!rutgers!ucla-cs!sdcrdcf!psivax!csun!aeusesef
From: aeusesef@csun.UUCP (Sean Eric Fagan)
Newsgroups: comp.sys.intel
Subject: 80386 Multiplication Bug
Message-ID: <657@csun.UUCP>
Date: Thu, 2-Jul-87 16:20:26 EDT
Article-I.D.: csun.657
Posted: Thu Jul  2 16:20:26 1987
Date-Received: Sat, 4-Jul-87 17:24:21 EDT
Organization: California State University, Northridge
Lines: 19
Keywords: 80386 multiplication wrong how