Re: Semaphore assembly-code bug
From: Jeff Garzik
Date: Fri Oct 29 2004 - 22:39:03 EST
Linus Torvalds wrote:
Anyway, it's quite likely that for several CPU's the fastest sequence ends
up actually being
movl 4(%esp),%ecx
movl 8(%esp),%edx
movl 12(%esp),%eax
addl $16,%esp
which is also one of the biggest alternatives.
That's how I'm coding the sparse "compiler backend"... the mov's and
add's tend to be tiny instructions (i-cache friendly), and you can often
issue a bunch of them through multiple pipes/ports.
Jeff
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