pouly amaury wrote:
>
> for (x = (unsigned)(FREQ>>22); x; x--)
> asm volatile("":::"memory");
>
> Clobbering memory is likely to prevent gcc from optimizing the loop away.But it will break with loop-unrolling (i.e. -O3). x times nothing is nothing ;-) You *have* to use a nop-instruction. And the cast is bogus - only silences the compiler without fixing the problem. Ciao, ET.
