copysignl.s revision 25c28e83beb90e7c80452a7c818c5e6f73a07dc8
/*
* 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 "copysignl.s"
#include "libm.h"
LIBM_ANSI_PRAGMA_WEAK(copysignl,function)
#include "libm_synonyms.h"
ENTRY(copysignl)
movl 12(%esp),%eax / sign and bexp of x
movl 24(%esp),%ecx / sign and bexp of y
andl $0x00007fff,%eax / eax <-- bexp(x)
andl $0x00008000,%ecx / ecx <-- sign(y)
orl %ecx,%eax / eax <-- bexp(x) with sign(y)
movl 8(%esp),%ecx / ecx <-- hi_32(sgnfcnd(x))
movl 4(%esp),%edx / edx <-- lo_32(sgnfcnd(x))
subl $12,%esp / set up loading dock for result
movl %edx,(%esp) / copy lo_32(result's sgnfcnd)
/ to loading dock
movl %ecx,4(%esp) / copy hi_32(result's sgnfcnd)
/ to loading dock
movl %eax,8(%esp) / copy sign&bexp(result)
/ to loading dock
fldt (%esp) / load copysign(x,y)
addl $12,%esp / restore stack-pointer for return
ret
.align 4
SET_SIZE(copysignl)