1 /*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #if defined(LIBC_SCCS) && !defined(lint) 9 static char sccsid[] = "@(#)ffs.c 5.3 (Berkeley) 05/15/90"; 10 #endif /* LIBC_SCCS and not lint */ 11 12 /* 13 * ffs -- vax ffs instruction 14 */ 15 ffs(mask) 16 register int mask; 17 { 18 register int bit; 19 20 if (mask == 0) 21 return(0); 22 for (bit = 1; !(mask & 1); bit++) 23 mask >>= 1; 24 return(bit); 25 } 26