RE: [ros-dev] RE: [ros-diffs] [CVS reactos] FPU/SSE state savingontaskswitching, FPU and SSE exception support.

[Hartmut Birr]

Hi,

with one little change, your patch works perfect on my smp machine. It must
be changed a 'movl' to a 'movb':

movb	$NPX_STATE_VALID, KTHREAD_NPX_STATE(%ebx)

I've expand your test program a little bit. It works now with four threads.

- Hartmut
> -----Original Message-----
> From: [e-mail] 
> [mailto:[e-mail]] On Behalf Of Gregor Anich
> Sent: Tuesday, November 23, 2004 9:56 PM
> To: ReactOS Development List
> Subject: Re: [ros-dev] RE: [ros-diffs] [CVS reactos] FPU/SSE 
> state savingontaskswitching, FPU and SSE exception support.
>
> Hello again!
>
> Hartmut Birr wrote:
> > I've revert some parts of fpu.c to your first patch. It
>
> works now on my smp
> > machine.
>
> I have attached a patch to this email, maybe you can try if it works 
> with this patch. It is a patch against current reactos CVS.
>
> I didn't see diff which you attached to your mail the first 
> time, but it 
> looks like it's an old version of the fpu.c which I have modified... 
> maybe it doesn't bugcheck but I think it won't work (unless you have 
> also reverted tskswitch.S...)
>
> I have also attached a fputest program which tests wether the 
> FPU state 
> is preserved or not.
> blight