/*
 * 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   */

        .file   "fpsetmask.s"

/*
 * 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
 */

#include "SYS.h"

        ANSI_PRAGMA_WEAK(fpsetmask,function)

        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+STACK_BIAS+ARGPUSH]  ! get fsr value
        ld      [%sp+STACK_BIAS+ARGPUSH], %o0   ! load into register
        and     %o1, %o4, %o1           ! generate new fsr value
        andn    %o0, %o4, %o2
        or      %o1, %o2, %o1
        st      %o1, [%sp+STACK_BIAS+ARGPUSH]   ! move new fsr value to memory
        ld      [%sp+STACK_BIAS+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)