usr/src/lib/libc/i386/gen/abs.s

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27         .file   "abs.s"
  28
  29 /       /* Assembler program to implement the following C program */
  30 /       int
  31 /       abs(arg)
  32 /       int     arg;
  33 /       {
  34 /               return((arg < 0)? -arg: arg);
  35 /       }
  36
  37 #include "SYS.h"
  38
  39         ENTRY(abs)
  40         movl    4(%esp),%eax    / arg < 0?
  41         testl   %eax,%eax
  42         jns     1f
  43         negl    %eax            / yes, return -arg
  44 1:
  45         ret
  46         SET_SIZE(abs)
  47
  48         ENTRY(labs)
  49         movl    4(%esp),%eax    / arg < 0?
  50         testl   %eax,%eax
  51         jns     1f
  52         negl    %eax            / yes, return -arg
  53 1:
  54         ret
  55         SET_SIZE(labs)