Path: utzoo!mnetor!uunet!husc6!cmcl2!nrl-cmf!ames!pacbell!att-ih!ihnp4!inuxc!iuvax!pur-ee!uiucdcs!uiucdcsp!gillies
From: gillies@uiucdcsp.cs.uiuc.edu
Newsgroups: comp.sys.mac.programmer
Subject: Re: (Very) Long Multiplies
Message-ID: <104700008@uiucdcsp>
Date: 17 Mar 88 19:09:00 GMT
References: <11318@duke.cs.duke.edu>
Lines: 11
Nf-ID: #R:duke.cs.duke.edu:11318:uiucdcsp:104700008:000:492
Nf-From: uiucdcsp.cs.uiuc.edu!gillies    Mar 17 13:09:00 1988


Yes, the 68020 has a 32*32->64bit multiply instruction.  It is called
"MULS.L".  The syntax (p B-118 of Motorolla 68020 manual) is:

MULS.L <ea>,Dh;Dl		32 * 32 -> 64

Unfortunately, LSC does not support 68020 opcodes, I believe.  So you
cannot access this instruction from the current incarnation of LSC.
You could wait a few months and get LSC v3.0, which is supposed to
support 68020 opcodes.  Meanwhile, you might write a routine using a
different assembler (MPW?) that supports the 68020.