Re: [PATCH] arch: ia64: kernel: palinfo.c: Optimization of the Code

[Clemens Ladisch]

Rickard Strandqvist wrote:
> From what I know, AND is faster then modulo.

Which is why the compiler does this optimization automatically,
if it can prove that it is correct.

> -		if (i != 0 && (i%64) == 0)
> +		if (i != 0 && (i&63) == 0)

Did you prove that i cannot be negative?


Regards,
Clemens
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