i386/string/ffs.s

   1 /*
   2  * Copyright (c) 2005-2006 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24
  25         .text
  26
  27         .align  2
  28         .globl  _ffs
  29 _ffs:
  30         .globl  _ffsl
  31 _ffsl:
  32         movl    $(-1), %edx
  33         bsfl    4(%esp), %eax
  34         cmovel  %edx, %eax
  35         incl    %eax
  36         ret
  37
  38
  39         .align  2
  40         .globl _fls
  41 _fls:
  42         .globl  _flsl
  43 _flsl:
  44         movl    $(-1), %edx
  45         bsrl    4(%esp), %eax
  46         cmovel  %edx, %eax
  47         incl    %eax
  48         ret