4.3BSD - /usr/src/lib/libc/vax/gen/ffs.s

   1: /*
   2:  * Copyright (c) 1983 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: #ifdef LIBC_SCCS
   8:         .asciz  "@(#)ffs.s	5.3 (Berkeley) 3/9/86"
   9: #endif LIBC_SCCS
  10: 
  11: /* bit = ffs(value) */
  12: 
  13: #include "DEFS.h"
  14: 
  15: ENTRY(ffs, 0)
  16:         ffs     $0,$32,4(ap),r0
  17:         bneq    1f
  18:         mnegl   $1,r0
  19: 1:
  20:         incl    r0
  21:         ret

Defined functions