Path: utzoo!mnetor!uunet!husc6!mailrus!nrl-cmf!ames!umd5!spier
From: spier@umd5.umd.edu (Lori Spier)
Newsgroups: comp.sys.m68k
Subject: assembly sine function
Message-ID: <2514@umd5.umd.edu>
Date: 29 Mar 88 20:41:15 GMT
Organization: University of Maryland, College Park
Lines: 25
Keywords: asssembly language sine trig function


does anyone out there have a PD sine/cosine function written in 68000
assembly language?  I need one that will be VERY fast, for it will be
called durring an interrupt (VBLANK).  

also, if I want to multiply a number in a data register, like D0, by,
lets say 12, are these two sections of code equal for all cases (negative
and positive numbers):

	muls	#12,d0

and:

	add	d0,d0
	add	d0,d0
	move	d0,d1
	add	d0,d0
	add	d1,d0

thanks for any help you can give.

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Brett Bourbin, President Selgus Ltd.
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