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SubjectRe: Want comments regarding patch
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> Yeah I don't do assembler soo often that I would know everything from heart.
> All your comments are valid of course. I just wanted to point out the idea.
> (However, if it's not repz, then it's repnz! :-)

it's better to use a gcc builtin than handcoding the asm yourself;
better for performance at least....
(gcc will pick the best code for the cpu you picked, and yes this
changes every generation or so)

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