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 .file "fpsetmask.s" 31 32/* 33 * fp_except fpsetmask(mask) 34 * fp_except mask; 35 * set exception masks as defined by user and return 36 * previous setting 37 * any sticky bit set whose corresponding mask is dis-abled 38 * is cleared 39 */ 40 41#include "SYS.h" 42 43 ANSI_PRAGMA_WEAK(fpsetmask,function) 44 45 ENTRY(fpsetmask) 46 add %sp, -SA(MINFRAME), %sp ! get an additional word of storage 47 set 0x0f800000, %o4 ! mask of trap enable bits 48 sll %o0, 23, %o1 ! move input bits into position 49 st %fsr, [%sp+STACK_BIAS+ARGPUSH] ! get fsr value 50 ld [%sp+STACK_BIAS+ARGPUSH], %o0 ! load into register 51 and %o1, %o4, %o1 ! generate new fsr value 52 andn %o0, %o4, %o2 53 or %o1, %o2, %o1 54 st %o1, [%sp+STACK_BIAS+ARGPUSH] ! move new fsr value to memory 55 ld [%sp+STACK_BIAS+ARGPUSH], %fsr ! load fsr with new value 56 and %o0, %o4, %o0 ! mask off bits of interest in old fsr 57 srl %o0, 23, %o0 ! return old trap enable value 58 retl 59 add %sp, SA(MINFRAME), %sp ! reclaim stack space 60 61 SET_SIZE(fpsetmask) 62