*BSD News Article 88673


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From: doug@qnx.com (Doug Santry)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: FreeBSD slower than Linux ?
Date: 5 Feb 1997 15:36:20 -0500
Organization: QNX Software Systems
Lines: 18
Message-ID: <5dar04$j50@qnx.com>
References: <dkleinh.854654600@isotope.ps.uci.edu> <5cta6n$eio@helena.mt.net> <5d4s48$gru@qnx.com> <5d5vdb$emg@uriah.heep.sax.de>
NNTP-Posting-Host: qnx.com
Xref: euryale.cc.adfa.oz.au comp.unix.bsd.freebsd.misc:35204

In article <5d5vdb$emg@uriah.heep.sax.de>,
J Wunsch <joerg_wunsch@uriah.heep.sax.de> wrote:
>doug@qnx.com (Doug Santry) wrote:
>
>> >Umm, no.  You can't emulate hardware floating point calls, which is what
>> 
>> Why not?  If no FPU is present, then the instructions will cause a trap
>> which can be caught.  You know which instruction caused the trap, so just
>> emulate it in software.
>
>But that's way slower.

I agree.  It would be a nightmare.  A better idea would be on the first
such trap to switch to different libs.  I just objected to the "can't"
which is different from "bad idea"!.  He was responding to my previous
post and claiming it couldn't be done.

DJS