Re: [glob2-devel] Division is bad...

[Cyrille Dunant]

On Saturday 08 July 2006 11:53, Stéphane Magnenat wrote:
> .. just a reminder in case people think that division is fast those days :
>
> idiv, number of cycle :
> - Pentium 4   80 cycles
> - Core                15 cycles
> - Core 2              17 cycles
> - Athlon 64   40 cycles
>
> As a comparaison, imul is 1 cycle everywhere and shl, rol is 0.33 cycle (3
> shift per cycle) in Athlon 64.
>
> Have a nice day,
>
> Steph

Yes, but we all expect the compiler to make divisions into multiplications 
when possible :)

CU

 -- CFD