On 3/28/07, Arjan van de Ven <[EMAIL PROTECTED]> wrote:
On Tue, 2007-03-27 at 09:17 -0700, Allexio Ju wrote: > I thought those macros simply tell compiler to layout code in such a > way that minimizes unnecessary jumps. it's more than that. it generally also tells the processor what the branch will be, at which point most processors disable their own branch prediction logic. Trying to hand-layout code is almost always a mistake... don't do that. GCC also is quite good at recognizing certain patterns to keep the code flow working. Trying to override that only hurts...
I see... thanks for clarification.
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