Add a macro that creates a 64bit value which has length number of ones shifted acrros by the value of shift.
Signed-off-by: Alistair Francis <alistair.fran...@xilinx.com> Reviewed-by: Alex Bennée <alex.ben...@linaro.org> --- V5: - Re-write to a 64-bit mask instead of ONES() - Re-order this patch in the series include/qemu/bitops.h | 3 +++ 1 file changed, 3 insertions(+) diff --git a/include/qemu/bitops.h b/include/qemu/bitops.h index 755fdd1..3c45791 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) \ + (((1ull << (length)) - 1) << shift) + /** * set_bit - Set a bit in memory * @nr: the bit to set -- 2.7.4
