Commit 680270f8 authored Dec 10, 2016 by Carles Cufi Committed by Andrew Boie Dec 12, 2016

toolchain: Add a popcount macro for GCC

Hamming Weight or "popcount" consists in counting the number of bits set
to 1 in a particular word. This commit adds a macro to be able to use
the existing builtin for this purpose with the GCC compiler.

Change-Id: Iec64c19e897de2bc02e981071465bbe230ee9add
Signed-off-by: Carles Cufi <carles.cufi@nordicsemi.no>

parent b80db0a4

include/toolchain/gcc.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -76,6 +76,8 @@ do { \
		#define likely(x) __builtin_expect((long)!!(x), 1L)
		#define unlikely(x) __builtin_expect((long)!!(x), 0L)

		#define popcount(x) __builtin_popcount(x)

		#define __weak __attribute__((__weak__))
		#define __unused __attribute__((__unused__))

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