/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
 */
/*
 * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

        .file   "copysign.s"

#include "libm.h"
LIBM_ANSI_PRAGMA_WEAK(copysign,function)

        ENTRY(copysign)
        movl    8(%esp),%eax            / eax <-- hi_32(x)
        movl    16(%esp),%ecx           / ecx <-- hi_32(y)
        andl    $0x7fffffff,%eax        / eax <-- hi_32(abs(x))
        andl    $0x80000000,%ecx        / ecx[31] <-- sign_bit(y)
        orl     %ecx,%eax               / eax <-- hi_32(copysign(x,y))
        movl    4(%esp),%ecx            / ecx <-- lo_32(x)
                                        /       = lo_32(copysign(x,y))
        subl    $8,%esp                 / set up loading dock for result
        movl    %ecx,(%esp)             / copy lo_32(result) to loading dock
        movl    %eax,4(%esp)            / copy hi_32(result) to loading dock
        fldl    (%esp)                  / load copysign(x,y)
        fwait                           / in case fldl causes exception
        addl    $8,%esp                 / restore stack-pointer for return
        ret
        .align  4
        SET_SIZE(copysign)