Xref:	news2.mv.net comp.os.msdos.djgpp:6052
From:	Charles Sandmann <sandmann AT clio DOT rice DOT edu>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: 387 emulation slowed down *a lot*
Date:	Tue, 16 Jul 1996 08:36:19 CDT
Organization:	Rice University, Houston, Texas
Lines:	11
Message-ID:	<31eb9ad3.sandmann@clio.rice.edu>
References:	<4sdt9p$djj AT news2 DOT delphi DOT com>
Reply-To:	sandmann AT clio DOT rice DOT edu
NNTP-Posting-Host:	clio.rice.edu
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

> Has there been a major change in the way floating point instructions
> are intercepted in this version? Anything I can do?

Essentially a complete re-write.  FPU emulation didn't work with V1.x 
under DPMI.  When I did FPU emulation in V2, my goal was to make it
work with a minimum of code and effort.  So I used the signal library,
which took about 3 lines of code.  This isn't the fastest way, which
would require some assembly glue to hook in, etc.  Since FPUs are 
essentially free now, I couldn't justify spending an extra 10 minutes
on it.  If you want to hack on NPXSETUP, you can probably make it 
faster.  But it's probably easier to find a 387 or 486DX ...

- Raw text -