Re: gcc-3.1.1 on alpha

[Igor Schein <igor@txc.com>]

On Tue, Sep 24, 2002 at 06:28:17PM +0200, Bill Allombert wrote:
> On Mon, Sep 23, 2002 at 08:16:51PM +0200, Bill Allombert wrote:
> > On Tue, Jul 30, 2002 at 06:00:55PM -0400, Igor Schein wrote:
> > > Hi,
> > > 
> > > gcc-3.1.1 miscompiles latest CVS pari code on alpha-linux:
> > > 
> > > ? conjvec(Mod(x^2+x+1,x^3-x-1))
> > >   ***   bug in GP (Floating Point Exception), please report
> > > 
> > > That's with debugging binary + alpha kernel.  With generic kernel it
> > > works fine. 
> 
> It looks like mulll is not specified correctly. It allowed gcc
> to use the same register in input and ouput, clobbering it.
> I have no knowledge of the alpha asm, so I do not really know
> if I do something meaningful.  Here a patch that fix all the asm macros.
> 
> Please test!!

I applied the patch and compiled with gcc-3.2.   All segmentation
faults are done.  Does any performance penalty come with your patch?

Igor