| FFS(9) | Basic C Library Functions | FFS(9) |
NAME¶
ffs - find first set bit in wordSYNOPSIS¶
int ffs(int x);
ARGUMENTS¶
xthe word to search
DESCRIPTION¶
This is defined the same way as the libc and compiler builtin ffs routines, therefore differs in spirit from the other bitops. ffs(value) returns 0 if value is 0 or the position of the first set bit if value is nonzero. The first (least significant) bit is at position 1.COPYRIGHT¶
| May 2018 | Kernel Hackers Manual 3.16 |