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1 | /*- |
2 | * Copyright (c) 1990 The Regents of the University of California. | |
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3 | * All rights reserved. |
4 | * | |
86fec01b | 5 | * %sccs.include.redist.c% |
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6 | */ |
7 | ||
8 | #if defined(LIBC_SCCS) && !defined(lint) | |
336401ac | 9 | static char sccsid[] = "@(#)ffs.c 5.4 (Berkeley) %G%"; |
3c38b559 | 10 | #endif /* LIBC_SCCS and not lint */ |
dba1d438 | 11 | |
336401ac KB |
12 | #include <string.h> |
13 | ||
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14 | /* |
15 | * ffs -- vax ffs instruction | |
16 | */ | |
17 | ffs(mask) | |
86fec01b | 18 | register int mask; |
dba1d438 | 19 | { |
86fec01b | 20 | register int bit; |
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21 | |
22 | if (mask == 0) | |
23 | return(0); | |
86fec01b | 24 | for (bit = 1; !(mask & 1); bit++) |
dba1d438 | 25 | mask >>= 1; |
86fec01b | 26 | return(bit); |
dba1d438 | 27 | } |