Re: rfa (x86): 387<=>sse moves

[Dale Johannesen <dalej at apple dot com>]

On Jul 31, 2005, at 9:51 AM, Uros Bizjak wrote:

> Hello!
>
> > With -march=pentium4 -mfpmath=sse -O2, we get an extra move for code 
> > like
> >
> >    double d = atof(foo);
> >    int i = d;
> >
> >
> >        call    atof
> >        fstpl   -8(%ebp)
> >        movsd   -8(%ebp), %xmm0
> >        cvttsd2si       %xmm0, %eax
> >
> >
> > (This is Linux, Darwin is similar.) I think the difficulty is that for
>
> This problem is similar to the problem, described in PR target/19398. 
> There is another testcase and a small analysis in the PR that might 
> help with this problem.

Thanks, that does seem relevant.  The patches so far don't fix this 
case;
I've commented the PR explaining why.