1/* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22/* 23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27/* Copyright (c) 1988 AT&T */ 28/* All Rights Reserved */ 29 30#pragma ident "%Z%%M% %I% %E% SMI" 31 32 .file "%M%" 33 34/* 35 * fp_except fpsetmask(mask) 36 * fp_except mask; 37 * set exception masks as defined by user and return 38 * previous setting 39 * any sticky bit set whose corresponding mask is dis-abled 40 * is cleared 41 */ 42 43#include "SYS.h" 44 45 ANSI_PRAGMA_WEAK(fpsetmask,function) 46 47 ENTRY(fpsetmask) 48 add %sp, -SA(MINFRAME), %sp ! get an additional word of storage 49 set 0x0f800000, %o4 ! mask of trap enable bits 50 sll %o0, 23, %o1 ! move input bits into position 51 st %fsr, [%sp+ARGPUSH] ! get fsr value 52 ld [%sp+ARGPUSH], %o0 ! load into register 53 and %o1, %o4, %o1 ! generate new fsr value 54 andn %o0, %o4, %o2 55 or %o1, %o2, %o1 56 st %o1, [%sp+ARGPUSH] ! move new fsr value to memory 57 ld [%sp+ARGPUSH], %fsr ! load fsr with new value 58 and %o0, %o4, %o0 ! mask off bits of interest in old fsr 59 srl %o0, 23, %o0 ! return old trap enable value 60 retl 61 add %sp, SA(MINFRAME), %sp ! reclaim stack space 62 63 SET_SIZE(fpsetmask) 64