error_code:
 pushl %ds
 pushl %eax
 xorl %eax, %eax
 pushl %ebp
 pushl %edi
 pushl %esi
 pushl %edx
 decl %eax   # eax = -1
 pushl %ecx
 pushl %ebx

My question is why the 'decl %eax' is 4 lines after the clearing of eax 'xorl
%eax %eax'. Can't it just be put right after xorl?

Of course you can put it anywhere you want, but I wonder if there is a
particular reason to put it there, or is just some personal taste?

/Michael

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Timur Tabi
Staff Software Engineer
timur.t...@ammasso.com

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Kernelnewbies: Help each other learn about the Linux kernel.
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Can anyone tell me where I can read more about optimizing for pipelining? I
searched the internet and looked in the intel specifications, but I only find
explanations on how the pipelining and prefetching works, not how to optimize
for it.

Could someone at least tell me how the optimization works in this example? (if
its not far too complex, then I'll forget about it)

/Michael

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Kernelnewbies: Help each other learn about the Linux kernel.
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just knowing how pipelining and prefetching works will bring you a long way.

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