On 04/19/2012 01:35 PM, Avi Kivity wrote:
> On 04/19/2012 01:26 PM, Gleb Natapov wrote:
> > >
> > > Unrelated: this pattern is probably common. Would be nice to have a
> > > __deposit_bit() function.
> > >
> > What semantics should it have? Set bit A in bitmap B if value C is
> > non-zero?
> >
>
> void __deposit_bit(bool bit, unsigned index, unsigned long *word)
> {
> if (bit)
> __set_bit(...)
> else
> __clear_bit(...)
> }
>
> I think some processors have an instruction for it (not an s390 reference).
>
Looks like x86 will get one too: PDEP.
--
error compiling committee.c: too many arguments to function
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