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Re: test machines; illegal instructions

To: Jun Sun <jsun@mvista.com>
Subject: Re: test machines; illegal instructions
From: Ralf Baechle <ralf@oss.sgi.com>
Date: Sun, 7 Oct 2001 03:39:10 +0200
Cc: jim@jtan.com, "H . J . Lu" <hjl@lucon.org>, linux-mips@oss.sgi.com
In-reply-to: <3BBDF25F.1A0F2283@mvista.com>; from jsun@mvista.com on Fri, Oct 05, 2001 at 10:48:15AM -0700
References: <20010926221223.A17628@neurosis.mit.edu> <20010926202610.B7962@lucon.org> <20011004011632.A19472@neurosis.mit.edu> <3BBDF25F.1A0F2283@mvista.com>
Sender: owner-linux-mips@oss.sgi.com
User-agent: Mutt/1.2.5i
On Fri, Oct 05, 2001 at 10:48:15AM -0700, Jun Sun wrote:

> If your cpu does not have ll/sc instruction, you might be suffering the famous
> sysmips() problem.  The latest kernel should get you going.
> 
> There is also FPU emulation bug which may cause this problem, but that only
> happens on heavy context switches and FPU usages.

I've checked in a major bundle of FPU emu fixes last week.  The kernel
fp code should now produce accurate results and handle exceptions and
the Flush to Zero bit as per spec.

I have a load more fp fixes pending which I'll checking as soon as I'm
absolutely convinced they'll do the right thing.

  Ralf

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