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| author | Jiri Olsa <jolsa@kernel.org> | 2016-08-01 21:02:31 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-08-02 22:33:27 +0300 |
| commit | 741c74f55e8a66f3bc5bbc29dc162c952759e47b (patch) | |
| tree | cac565727d5c11ee0e6044e16f51d53b2351e251 /tools/include | |
| parent | 820d12b70f91a19eb4a3152b9dd4ea9aee194a36 (diff) | |
| download | linux-741c74f55e8a66f3bc5bbc29dc162c952759e47b.tar.xz | |
tools lib: Add bitmap_and function
Add support to perform logical and on bitmaps. Code taken from kernel's
include/linux/bitmap.h.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1470074555-24889-4-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/include')
| -rw-r--r-- | tools/include/linux/bitmap.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/tools/include/linux/bitmap.h b/tools/include/linux/bitmap.h index 1cdded0041a8..43c1c5021e4b 100644 --- a/tools/include/linux/bitmap.h +++ b/tools/include/linux/bitmap.h @@ -11,6 +11,8 @@ int __bitmap_weight(const unsigned long *bitmap, int bits); void __bitmap_or(unsigned long *dst, const unsigned long *bitmap1, const unsigned long *bitmap2, int bits); +int __bitmap_and(unsigned long *dst, const unsigned long *bitmap1, + const unsigned long *bitmap2, unsigned int bits); #define BITMAP_FIRST_WORD_MASK(start) (~0UL << ((start) & (BITS_PER_LONG - 1))) @@ -85,4 +87,19 @@ static inline unsigned long *bitmap_alloc(int nbits) size_t bitmap_scnprintf(unsigned long *bitmap, int nbits, char *buf, size_t size); +/** + * bitmap_and - Do logical and on bitmaps + * @dst: resulting bitmap + * @src1: operand 1 + * @src2: operand 2 + * @nbits: size of bitmap + */ +static inline int bitmap_and(unsigned long *dst, const unsigned long *src1, + const unsigned long *src2, unsigned int nbits) +{ + if (small_const_nbits(nbits)) + return (*dst = *src1 & *src2 & BITMAP_LAST_WORD_MASK(nbits)) != 0; + return __bitmap_and(dst, src1, src2, nbits); +} + #endif /* _PERF_BITOPS_H */ |