[discuss] SAHF instruction not available in 64-bit mode

[Nitin Puri]

Thanx Andi.

Exactly the  same way that I've implemented it.
I was curious why this instruction has been removed
from 64-bit mode ? Or if it been reassigned.
LAHF too.

Rgds,
Nitin




At 02:29 Nitin 4/8/2004, Andi Kleen wrote:
>On Thu, 08 Apr 2004 13:25:19 +0530
>Nitin Puri <npuri at cadence.com> wrote:
>
> > The instruction SAHF, which loads the SF, ZF, AF, PF, and CF flags
> > of the EFLAGS register with values from the corresponding bits in the
> > AH register, is not available in 64-bit mode on Opetron.
> >
> > Is there any equivalent instruction that I can use for this in 64-bit 
> mode ?
>
>         push $neweflagsvalue
>         popf
>
>-Andi