Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!apple!vsi1!daver!lynx!m5
From: m5@lynx.uucp (Mike McNally)
Newsgroups: comp.sys.m68k
Subject: Context switching with FPP
Message-ID: <5664@lynx.UUCP>
Date: 26 May 89 17:55:44 GMT
Reply-To: m5@lynx.UUCP (Mike McNally)
Distribution: na
Organization: Lynx Real-Time Systems Inc, Campbell CA
Lines: 13

Are there any clever things an OS can do to avoid the overhead of saving
the status of the 6888[12] on each context switch?  It would be nice
if there were a hook like in the 386/387 such that the CPU would get
an interrupt upon the first FP instruction after a context switch.  I
realize that the situation is somewhat more complex because the 68K
can (in theory) have several coprocessors.


-- 
Mike McNally                                    Lynx Real-Time Systems
uucp: {voder,athsys}!lynx!m5                    phone: 408 370 2233

            Where equal mind and contest equal, go.