Re: [B2-devel] Optimizations to AltiVec code now in CVS

[Gwenole B. <gb...@di...>]

Hi,

> The only problem is that for some reason ICC 7 does not like your sse 
> &mmx
> optimizations and now crashes the compiler.

Even icc v8 never actually compiled ppc-dyngen-ops.cpp correctly. 
That's why I explictly make use of gcc for the synthetic opcodes. 
Reconfigure your build with an updated configure script.

> to see the speed boost really needed on the x86 side just maybe it 
> time that
> we found an assembly programmer to optimize as much ppc to x86 code as
> possible in asm.

This is silly. There is nothing to asm optimize. The only bits 
asm-optimized are byte-swapping and locking mechanisms. I tried to asm 
optimize subfe/adde/addeo/etc. instructions. gain was nearly zero.

> Jit is amazing technology but it don't think it handles
> the complexity of ppc emulation nearly as well as it did on the 68k 
> core.

The current JIT is designed to be portable. The next JIT is aimed at 
producing optimized code.

> Also can anyone explain why even with fresh install of 7.6.1 with 
> extensions
> off and virutal memeory off why I am still getting bits of ms mac 
> office
> code or something in my rom images on Alchemy based powermacs.

That's indeed unsual. ;-) Maybe try to boot off a CD to get a non 
polluted system folder?

Bye,
Gwenole.