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util: move BITFIELD macros to util/macros.h

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Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
This commit is contained in:
Timothy Arceri
2019-02-06 12:18:52 +11:00
parent cbd1ad6165
commit d0abbaa528
2 changed files with 18 additions and 24 deletions
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18
src/util/macros.h
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@@ -296,4 +296,22 @@ do { \
#define EXPLICIT_CONVERSION
#endif
/** Set a single bit */
#define BITFIELD_BIT(b) (1u << (b))
/** Set all bits up to excluding bit b */
#define BITFIELD_MASK(b) \
((b) == 32 ? (~0u) : BITFIELD_BIT((b) % 32) - 1)
/** Set count bits starting from bit b */
#define BITFIELD_RANGE(b, count) \
(BITFIELD_MASK((b) + (count)) & ~BITFIELD_MASK(b))
/** Set a single bit */
#define BITFIELD64_BIT(b) (1ull << (b))
/** Set all bits up to excluding bit b */
#define BITFIELD64_MASK(b) \
((b) == 64 ? (~0ull) : BITFIELD64_BIT(b) - 1)
/** Set count bits starting from bit b */
#define BITFIELD64_RANGE(b, count) \
(BITFIELD64_MASK((b) + (count)) & ~BITFIELD64_MASK(b))
#endif /* UTIL_MACROS_H */