fpsetmask.s revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (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 (c) 1988 AT&T */
/* All Rights Reserved */
/* Copyright (c) 1989 by Sun Microsystems, Inc. */
.ident "%Z%%M% %I% %E% SMI"
/* SVr4.0 1.4.1.9 */
/*
* fp_except fpsetmask(mask)
* fp_except mask;
* set exception masks as defined by user and return
* previous setting
* any sticky bit set whose corresponding mask is dis-abled
* is cleared
*/
.file "fpsetmask.s"
#include <sys/asm_linkage.h>
ANSI_PRAGMA_WEAK(fpsetmask,function)
#include "synonyms.h"
ENTRY(fpsetmask)
add %sp, -SA(MINFRAME), %sp ! get an additional word of storage
set 0x0f800000, %o4 ! mask of trap enable bits
sll %o0, 23, %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
and %o0, %o4, %o0 ! mask off bits of interest in old fsr
srl %o0, 23, %o0 ! return old trap enable value
retl
add %sp, SA(MINFRAME), %sp ! reclaim stack space
SET_SIZE(fpsetmask)