Re: [Qemu-devel] [PATCH] Fix extlh instruction on Alpha

[Rob Landley]

On Thursday 17 September 2009 14:28:52 Vince Weaver wrote:
> The extlh instruction on Alpha currently doesn't work properly.
> It's a combination of a cut/paste bug (16 where it should be 32) as well
> as a "shift by 64" bug.
>
> This improves on an earlier patch that used labels, conditional jumps,
> and local variables.  Thanks go especially to Aurelien Jarno and Andreas
> Schwab who have a much better eye for bit-wise TCG optimization than I do.
>
> Vince

Any idea how hard it would be to whip up a qemu-system-alpha emulation?  I 
note that several real-world alpha boards were essentially just a PC with a 
different processor.  (In fact the original Athlon used the Alpha EV6 bus and 
was pin-compatible, so you could drop-in replace the processor with an Alpha 
if you could somehow reflash the bios with alpha instructions instead of x86.)

I'd like to boot Alpha Linux on qemu, and it doesn't seem like there's _that_ 
much more to do.  But last I asked (a couple years ago) I was told the Alpha 
protected mode stuff wasn't implemented yet...

Rob
-- 
Latency is more important than throughput. It's that simple. - Linus Torvalds