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[Qemu-devel] [PATCH v4 1/6] bitops: Add ONES macro


From: Peter Crosthwaite
Subject: [Qemu-devel] [PATCH v4 1/6] bitops: Add ONES macro
Date: Wed, 9 Apr 2014 00:15:39 -0700

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

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

 include/qemu/bitops.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/qemu/bitops.h b/include/qemu/bitops.h
index 340b1e7..b9fd60f 100644
--- a/include/qemu/bitops.h
+++ b/include/qemu/bitops.h
@@ -403,4 +403,6 @@ 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
-- 
1.9.1.1.gbb9f595




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