Re: [Qemu-devel] Re: MacOSX CVS build broken

[Daniel Egger]

On 21.01.2005, at 23:38, Ronald wrote:

>     d9d8:       4d 81 00 20     bgtlr
>     d9dc:       4b ff ff cc     b       d9a8 <op_pmaddwd_mmx+0x24>
>
> this really don't end with blr, but if I have understood correctly
> what I have found about bgtlr, it should do what blr do with some
> condition on r0.
> May be dyngen should verify on 4bffffcc too and not only 4e800020.

4e800020 is blr while bgtlr is 4d810020 so if you want to match on
bgtlr as well, the condition to check for would be more something like:

if ((get32((uint32_t *)p) != 0x4e800020) || (get32((uint32_t *)p) != 
0x4d810020))

I would have to check the G4 PEM but there are probably a few more
rarely generated variants which should be matched as well; also
probably there's an elegant bitmask which can be used for testing
this condition....

Servus,
      Daniel

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