William Chops Westfield wrote :

> On Friday, Apr 23, 2004, at 03:22 US/Pacific, Jinx wrote:
>
> >> 1 << GIE = B'10000000'
> >> 1 << T0IE= B'00100000'
> >> IOR them   B'10100000'
> >
> > Ah, gotcha. So T0IE is representing, in a user-friendly way, 5
>
> Yep...
> The (1 << bitnum) shift is a standard C hack for converting
> bit numbers to masks.  (You wouldn't want to do this at runtime,
> multiple shifts being rather inefficient.

> But there's not reason not to let the compiler do the math at
> compile time.)

Maybe lack of readability, if you (like me) are not familiar with those
"standard C hacks"...

Jan-Erik.

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