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Merge "param.h: whitespace cleanup" am: 29a89df9e2 am: a201789ffa

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am: 5327dd83f6

Change-Id: Ie3e41344c4f8452dc6c5cf4f8a5163679f724ee8
This commit is contained in:
Nick Kralevich 2019-03-27 17:27:50 -07:00 committed by android-build-merger
commit 539191979d
1 changed files with 7 additions and 5 deletions
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12
libc/include/sys/param.h
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@ -51,17 +51,19 @@
#endif
#define roundup(x, y) ((((x)+((y)-1))/(y))*(y))
/*
/**
* Returns true if the binary representation of the argument is all zeros
* or has exactly one bit set. Contrary to the macro name, this macro
* DOES NOT determine if the provided value is a power of 2. In particular,
* this function falsely returns true for powerof2(0) and some negative
* numbers.
*/
#define powerof2(x) \
({ __typeof__(x) _x = (x); \
__typeof__(x) _x2; \
__builtin_add_overflow(_x, -1, &_x2) ? 1 : ((_x2&_x) == 0 ); })
#define powerof2(x) \
({ \
__typeof__(x) _x = (x); \
__typeof__(x) _x2; \
__builtin_add_overflow(_x, -1, &_x2) ? 1 : ((_x2 & _x) == 0); \
})
/** Returns the lesser of its two arguments. */
#define MIN(a,b) (((a)<(b))?(a):(b))