fpsetrnd.s revision 7257d1b4d25bfac0c802847390e98a464fd787ac
/*
* 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 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1988 AT&T */
/* All Rights Reserved */
#pragma ident "%Z%%M% %I% %E% SMI"
.file "%M%"
#include "SYS.h"
ANSI_PRAGMA_WEAK(fpsetround,function)
ENTRY(fpsetround)
add %sp, -SA(MINFRAME), %sp ! get an additional word of storage
set 0xc0000000, %o4 ! mask of round control bits
sll %o0, 30, %o1 ! move input bits into position
st %fsr, [%sp+ARGPUSH] ! get fsr value
ld [%sp+ARGPUSH], %o0 ! load into register
and %o1, %o4, %o1 ! generate new fsr value
andn %o0, %o4, %o2
or %o1, %o2, %o1
st %o1, [%sp+ARGPUSH] ! move new fsr value to memory
ld [%sp+ARGPUSH], %fsr ! load fsr with new value
srl %o0, 30, %o0 ! return old round control value
retl
add %sp, SA(MINFRAME), %sp ! reclaim stack space
SET_SIZE(fpsetround)