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SubjectRe: asm ("rdtsc" : "=A" ((unsigned long long)d) );
On Thu, 7 Jan 1999, Hans Lermen wrote:

> While grebbing through the latest 2.2.0-pre5 I wonder why the "=A"
> constraint isn't used for (atleast) the rdtsc asm's.

Because most of the time we don't care about the high part of the tsc.

So we declare "dx" as clobbered.

Andrea Arcangeli


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