On Thu, 18 Mar 2004, Ralf Baechle wrote:
> On Thu, Mar 18, 2004 at 02:18:01PM +0100, Maciej W. Rozycki wrote:
> > As a side note, it makes me wonder where the borderline of the RISC
> > actually is. Even Intel abandoned support for bit insert/extract
> > instructions after an initial attempt for the i386. They figured out the
> > implementation was too complicated. ;-)
>
> Take a look at the 68020 to see where instruction set madness can lead:
>
> movel ([42, a0, d0.2*2],123), ([43, a0, d0.2*2], 22)
> bfextu ([42, a0, d0.2*2],123){8:8}, d2
These instructions didn't complete in 1 cycle, while the new RISCies do.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
