1 /* 2 * Copyright (c) 1987 Regents of the University of California. 3 * All rights reserved. The Berkeley software License Agreement 4 * specifies the terms and conditions for redistribution. 5 */ 6 7 #if defined(LIBC_SCCS) && !defined(lint) 8 static char sccsid[] = "@(#)ffs.c 5.1 (Berkeley) 01/27/87"; 9 #endif LIBC_SCCS and not lint 10 11 /* 12 * ffs -- vax ffs instruction 13 */ 14 ffs(mask) 15 register long mask; 16 { 17 register int cnt; 18 19 if (mask == 0) 20 return(0); 21 for (cnt = 1; !(mask & 1); cnt++) 22 mask >>= 1; 23 return(cnt); 24 } 25