Path: utzoo!mnetor!uunet!seismo!sundc!pitstop!sun!decwrl!ucbvax!hplabs!sdcrdcf!trwrb!arenberg
From: arenberg@trwrb.UUCP (Jeff Arenberg)
Newsgroups: comp.sys.mac.programmer
Subject: using 68881 directly
Message-ID: <769@trwcsed.trwrb.UUCP>
Date: 26 Feb 88 22:28:31 GMT
Reply-To: arenberg@trwcsed.UUCP (Jeff Arenberg)
Distribution: na
Organization: TRW EDS, Redondo Beach, CA
Lines: 18


I'm working on a very computationally intensive application on a Mac II
using LightspeedC.  I think things will go much faster is I could make
call to the 68881 chip directly without using the SANE package.  So, two
questions. First, will LSC 3.0 have support for direct use of the 68881?
Second, can anyone tell me how to write short assembly code routines to do
simple operation (I only need add, subtract, multiply, divide and
square root) using pointers to variable in C?  That is, what are the 68881
op codes or trap calls for these operations?

Thanks,

Jeff Arenberg
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