Path: utzoo!attcan!uunet!husc6!endor!siegel
From: siegel@endor.harvard.edu (Rich Siegel)
Newsgroups: comp.sys.mac.programmer
Subject: Re: How do I use a floating point chip in a MAC II?
Keywords: programming floating MAC
Message-ID: <1397@husc6.harvard.edu>
Date: 12 Mar 89 23:32:25 GMT
References: <2129@aecom.YU.EDU>
Sender: news@husc6.harvard.edu
Reply-To: siegel@endor.UUCP (Rich Siegel)
Organization: Symantec/THINK Technologies, Bedford, MA
Lines: 22

In article <2129@aecom.YU.EDU> bob@aecom.YU.EDU (Bob Lummis) writes:
>I am programming in LSC.  I want to do floating point arithmetic as fast as
>possible on a machine with a floating point chip, but have the program still
>run (slower) on a plain Mac.  How do I do that?  How do I determine if I am
>executing on a machine with floating point?

	Use the 68881 code generation option, which will generate direct
calls to the coprocessor, and the Math881 library. The easy way to run
on multiple machines is to have separate versions of your program.

	You can determine the presence of the coprocessor by using SysEnvirons.

		--Rich



Rich Siegel
Staff Software Developer
THINK Technologies Division, Symantec Corp.
Internet: siegel@endor.harvard.edu
UUCP: ..harvard!endor!siegel
Phone: (617) 275-4800 x305