Message ID | 45fc995a0bc77763e295e5d25fba2dacac3997d5.1466626975.git.alistair.francis@xilinx.com |
---|---|
State | New |
Headers | show |
On 22 June 2016 at 21:23, Alistair Francis <alistair.francis@xilinx.com> wrote: > Add a macro that creates a 64bit value which has length number of ones > shifted across by the value of shift. > > Signed-off-by: Alistair Francis <alistair.francis@xilinx.com> > Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> thanks -- PMM
diff --git a/include/qemu/bitops.h b/include/qemu/bitops.h index 15418a8..98fb005 100644 --- a/include/qemu/bitops.h +++ b/include/qemu/bitops.h @@ -24,6 +24,9 @@ #define BIT_WORD(nr) ((nr) / BITS_PER_LONG) #define BITS_TO_LONGS(nr) DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(long)) +#define MAKE_64BIT_MASK(shift, length) \ + (((~0ULL) >> (64 - (length))) << (shift)) + /** * set_bit - Set a bit in memory * @nr: the bit to set