#ifndef FIO_FFZ_H | |
#define FIO_FFZ_H | |
static inline int __ffs(int word) | |
{ | |
int r = 0; | |
if (!(word & 0xffff)) { | |
word >>= 16; | |
r += 16; | |
} | |
if (!(word & 0xff)) { | |
word >>= 8; | |
r += 8; | |
} | |
if (!(word & 0xf)) { | |
word >>= 4; | |
r += 4; | |
} | |
if (!(word & 3)) { | |
word >>= 2; | |
r += 2; | |
} | |
if (!(word & 1)) { | |
word >>= 1; | |
r += 1; | |
} | |
return r; | |
} | |
static inline int ffz(unsigned int bitmask) | |
{ | |
return ffs(~bitmask); | |
} | |
#endif |