[tremor] ARM ASM performance gains, EVC vs. GCC

[Segher Boessenkool]

Werner Sharp wrote:
> 
> This very helpful post...
> 
> http://forums.pocketmatrix.com/viewtopic.php?t=4063&highlight=asm+compiler
> 
> talks about how to integrate ASM files into EVC.   So maybe just using GCC
> as an ASM generater and then adding it to an EVC project is the way to get
> it optimized for the Pocket PC.

What binary format does EVC generate/accept?  If it's (X)COFF, as I think it
is; you can have GCC generate that, and just link with it.

Anyway, to get really good performance for such a time-critical loop as the
DCT is, you jsut *have* to write it in assembler.

<p>Cheers,

Segher
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