From mboxrd@z Thu Jan  1 00:00:00 1970
To: 9fans@cse.psu.edu
From: Quinn Dunkan <quinn@hork.ugcs.caltech.edu>
Message-Id: <20010625035255.A1E2F7418D@hork.ugcs.caltech.edu>
Subject: [9fans] fpu emulation
Date: Sun, 24 Jun 2001 20:52:50 -0700
Topicbox-Message-UUID: bf2df4ec-eac9-11e9-9e20-41e7f4b1d025

If there's no FPU detected, does plan9 attempt to emulate one?  How can you
tell if it's emulating?

Here's what acid has to say:

826: math coprocessor emulation lua_tonumber+0x40   FMOVD   0x4(DX),F0
Notes pending:
    sys: fp: invalid fppc=0x13ed7

My current theory is that somehow plan 9 missed the FPU on my processor (AMD
K6-3) and enabled software FPU, which, due to little exercise, is buggy.



Also, acme's stmt() seems to get caught in an endless loop if the debugee gets
a note.  The PC never changes, so it keeps trying to execute the current one.

Speaking of acid, the documented acid functions fpr() and Fpr() don't seem to
exist.  I can get them with *F0\F, etc., but if I just type F0 instead of
getting an address it prints an empty string.