On 16/06/2016 19:12, Dr. David Alan Gilbert (git) wrote: > From: "Dr. David Alan Gilbert" <dgilb...@redhat.com> > > e.g. BIT_RANGE(15, 0) gives 0xff00
That looks more like BIT_RANGE(15, 8). :) Paolo > Suggested by: Paolo Bonzini <pbonz...@redhat.com> > Signed-off-by: Dr. David Alan Gilbert <dgilb...@redhat.com> > --- > include/qemu/bitops.h | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/include/qemu/bitops.h b/include/qemu/bitops.h > index 755fdd1..e411688 100644 > --- a/include/qemu/bitops.h > +++ b/include/qemu/bitops.h > @@ -23,6 +23,9 @@ > #define BIT_MASK(nr) (1UL << ((nr) % BITS_PER_LONG)) > #define BIT_WORD(nr) ((nr) / BITS_PER_LONG) > #define BITS_TO_LONGS(nr) DIV_ROUND_UP(nr, BITS_PER_BYTE * > sizeof(long)) > +/* e.g. BIT_RANGE(15, 0) -> 0xff00 */ > +#define BIT_RANGE(hb, lb) ((2ull << (hb)) - (1ull << (lb))) > + >