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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22/* Copyright (c) 1988 AT&T */ 23/* All Rights Reserved */ 24 25 26/* Copyright (c) 1989 by Sun Microsystems, Inc. */ 27 28.ident "%Z%%M% %I% %E% SMI" 29 /* SVr4.0 1.4.1.9 */ 30 31/* 32 * fp_except fpsetmask(mask) 33 * fp_except mask; 34 * set exception masks as defined by user and return 35 * previous setting 36 * any sticky bit set whose corresponding mask is dis-abled 37 * is cleared 38 */ 39 40 .file "fpsetmask.s" 41 42#include <sys/asm_linkage.h> 43 44 ANSI_PRAGMA_WEAK(fpsetmask,function) 45 46#include "synonyms.h" 47 48 ENTRY(fpsetmask) 49 add %sp, -SA(MINFRAME), %sp ! get an additional word of storage 50 set 0x0f800000, %o4 ! mask of trap enable bits 51 sll %o0, 23, %o1 ! move input bits into position 52 st %fsr, [%sp+ARGPUSH] ! get fsr value 53 ld [%sp+ARGPUSH], %o0 ! load into register 54 and %o1, %o4, %o1 ! generate new fsr value 55 andn %o0, %o4, %o2 56 or %o1, %o2, %o1 57 st %o1, [%sp+ARGPUSH] ! move new fsr value to memory 58 ld [%sp+ARGPUSH], %fsr ! load fsr with new value 59 and %o0, %o4, %o0 ! mask off bits of interest in old fsr 60 srl %o0, 23, %o0 ! return old trap enable value 61 retl 62 add %sp, SA(MINFRAME), %sp ! reclaim stack space 63 64 SET_SIZE(fpsetmask) 65