Path: utzoo!attcan!uunet!husc6!bloom-beacon!ht!spt!gz
From: gz@spt.entity.com (Gail Zacharias)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Knowing Machine Code (really 68881 emulation)
Message-ID: <318@spt.entity.com>
Date: 16 Jun 88 22:50:54 GMT
References: <13735@comp.vuw.ac.nz> <104700032@uiucdcsp> <4760@husc6.harvard.edu> <13542@shemp.CS.UCLA.EDU> <12217@apple.Apple.COM>
Reply-To: gz@entity.com (Gail Zacharias)
Organization: Hacks 'R Us, Cambridge, MA
Lines: 15

In <12217@apple.Apple.COM> dan@apple.apple.com.UUCP (Dan Allen) writes:
>In <13542@shemp.CS.UCLA.EDU> kennel@minnie.UUCP (Matthew Kennel) writes:
>>Then why doesn't the trap handler call the SANE package for '881
>>instructions?
>
>It could be done, and may be a neat solution, but has not been done.

Coral Common Lisp does exactly that i.e. it always uses 68881 instructions,
and if running on a system without a 68881, it installs an f-trap handler
which does the emulation using SANE.  The handler really wasn't all that hard
to write (even if it was way too hot that weekend...)

--
gz@entity.com					...!mit-eddie!spt!gz
	 Now let's all repeat the non-conformist oath.