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Implement rseq_hweight_ulong with __builtin_popcountl
[librseq.git]
/
src
/
rseq-alloc-utils.h
diff --git
a/src/rseq-alloc-utils.h
b/src/rseq-alloc-utils.h
index e486dcf7b7efffdc5fd9524d814df8b412b25da0..6a57c3d8f814756daf73bedbc72ae084a6507d8c 100644
(file)
--- a/
src/rseq-alloc-utils.h
+++ b/
src/rseq-alloc-utils.h
@@
-110,11
+110,7
@@
long rseq_get_page_len(void)
static inline
int rseq_hweight_ulong(unsigned long v)
{
- int count;
-
- for (count = 0; v; count++)
- v &= v - 1;
- return count;
+ return __builtin_popcountl(v);
}
#endif /* _RSEQ_ALLOC_UTILS_H */
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