Commit 6854710d authored Dec 15, 2016 by Daniel Verkamp

likely.h: fix spdk_likely condition



The __builtin_expect(), as written before, would have generated the
right branch taken/not taken condition, but the return value was the
opposite of the cond value.

We need to double-not the value to convert it to a 0/1 value while
preserving its original 0/non-zero sense.

Change-Id: I38101ff3ed8e89fc6516cfcdf7d642651545e4ff
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>

parent 01529c67

include/spdk/likely.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -39,6 +39,6 @@
		#define SPDK_LIKELY_H

		#define spdk_unlikely(cond) __builtin_expect((cond), 0)
		#define spdk_likely(cond) __builtin_expect(!(cond), 0)
		#define spdk_likely(cond) __builtin_expect(!!(cond), 1)

		#endif