Extended Precision Algorithms

Article View: comp.sys.misc

Article #1987

#1987

From: Jerry J Trantow
Date: Fri, 10 Feb 1989 19:37

10 lines
1089 bytes

Could someone please point me to some references for extended precision
arithmetic with the 68000 (and 020).  I need to work with QUADs, so that
I don't overflow unsigned longs (32bits) during some calculations.  I 
already have working QuadAdd(), QuadMult(), and QuadDiv() assembly routines.
I think my QuadAdd() and QuadMult() are fairly good, but it seems like my
QuadDiv() could be simplified.
I would appreciate any references to 64/32=32 bit division and 32X32=64 bit
multiplies.
By the way, the 020 instructions make this stuff trivial, but I want to 
have versions that will work with either processor.

Technical Details

Message-ID: <867@csd4.milw.wisc.edu>

Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.milw.wisc.edu!trantow

Show Full Headers

Complete Article Headers

Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.milw.wisc.edu!trantow
From: trantow@csd4.milw.wisc.edu (Jerry J Trantow)
Newsgroups: comp.sys.misc
Subject: Extended Precision Algorithms
Summary: References/ Code Wanted
Message-ID: <867@csd4.milw.wisc.edu>
Date: 10 Feb 89 19:37:16 GMT
Sender: news@csd4.milw.wisc.edu
Reply-To: trantow@csd4.milw.wisc.edu (Jerry J Trantow)
Distribution: na
Organization: University of Wisconsin-Milwaukee
Lines: 10