1*30423Smckusick /* 2*30423Smckusick * Copyright (c) 1987 Regents of the University of California. 3*30423Smckusick * All rights reserved. The Berkeley software License Agreement 4*30423Smckusick * specifies the terms and conditions for redistribution. 5*30423Smckusick */ 6*30423Smckusick 7*30423Smckusick #if defined(LIBC_SCCS) && !defined(lint) 8*30423Smckusick static char sccsid[] = "@(#)ffs.c 5.1 (Berkeley) 01/27/87"; 9*30423Smckusick #endif LIBC_SCCS and not lint 10*30423Smckusick 11*30423Smckusick /* 12*30423Smckusick * ffs -- vax ffs instruction 13*30423Smckusick */ 14*30423Smckusick ffs(mask) 15*30423Smckusick register long mask; 16*30423Smckusick { 17*30423Smckusick register int cnt; 18*30423Smckusick 19*30423Smckusick if (mask == 0) 20*30423Smckusick return(0); 21*30423Smckusick for (cnt = 1; !(mask & 1); cnt++) 22*30423Smckusick mask >>= 1; 23*30423Smckusick return(cnt); 24*30423Smckusick } 25