Re: [RFT] Port 0x80 I/O speed

[Andi Kleen]

> "=A" works on 32-bit systems (only), obviously, and gcc will generally 
> produce slightly better code as a result (gcc could really use a 
> register renaming/copy propagation step *after* multi-register entities 

I believe gcc 4.3 (or maybe 4.2) does that already -- it splits them much 
earlier.

-Andi
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