Author: kib
Date: Thu Jul 13 08:33:02 2017
New Revision: 320940
URL: https://svnweb.freebsd.org/changeset/base/320940
Log:
MFC r320755,r320762,r320893:
BIT_FLS(9).
Modified:
stable/10/sys/sys/bitset.h
Directory Properties:
stable/10/ (props changed)
Modified: stable/10/sys/sys/bitset.h
==============================================================================
--- stable/10/sys/sys/bitset.h Thu Jul 13 08:29:01 2017 (r320939)
+++ stable/10/sys/sys/bitset.h Thu Jul 13 08:33:02 2017 (r320940)
@@ -206,6 +206,21 @@
__bit; \
})
+#define BIT_FLS(_s, p) __extension__ ({
\
+ __size_t __i; \
+ int __bit; \
+ \
+ __bit = 0; \
+ for (__i = __bitset_words((_s)); __i > 0; __i--) { \
+ if ((p)->__bits[__i - 1] != 0) { \
+ __bit = flsl((p)->__bits[__i - 1]); \
+ __bit += (__i - 1) * _BITSET_BITS; \
+ break; \
+ } \
+ } \
+ __bit; \
+})
+
#define BIT_COUNT(_s, p) __extension__ ({
\
__size_t __i; \
int __count; \
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