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  * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
  23  */
  24 /*
  25  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  26  * Use is subject to license terms.
  27  */
  28 
  29         .file   "copysignf.s"
  30 
  31 #include "libm.h"
  32 LIBM_ANSI_PRAGMA_WEAK(copysignf,function)
  33 #include "libm_synonyms.h"
  34 
  35         ENTRY(copysignf)
  36         movl    4(%esp),%eax            / eax <-- x
  37         movl    8(%esp),%ecx            / ecx <-- y
  38         andl    $0x7fffffff,%eax        / eax <-- abs(x)
  39         andl    $0x80000000,%ecx        / ecx[31] <-- sign_bit(y)
  40         orl     %ecx,%eax               / eax <-- copysign(x,y)
  41         subl    $4,%esp                 / set up loading dock for result
  42         movl    %eax,(%esp)             / copy result to loading dock
  43         flds    (%esp)                  / load copysign(x,y)
  44         fwait                           / in case fldl causes exception
  45         addl    $4,%esp                 / restore stack-pointer for return
  46         ret
  47         .align  4
  48         SET_SIZE(copysignf)