[Qemu-devel] [PATCH v1 07/15] bitops: Add ONES macro

[Alistair Francis]

From: Peter Crosthwaite <address@hidden>

Little macro that just gives you N ones (justified to LSB).

Signed-off-by: Peter Crosthwaite <address@hidden>
---

 include/qemu/bitops.h |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/include/qemu/bitops.h b/include/qemu/bitops.h
index 8164225..27bf98d 100644
--- a/include/qemu/bitops.h
+++ b/include/qemu/bitops.h
@@ -430,4 +430,6 @@ static inline uint64_t deposit64(uint64_t value, int start, 
int length,
     return (value & ~mask) | ((fieldval << start) & mask);
 }
 
+#define ONES(num) ((num) == 64 ? ~0ull : (1ull << (num)) - 1)
+
 #endif
-- 
1.7.1