xref: /illumos-gate/usr/src/lib/libc/i386/fp/fpsetsticky.c (revision 1da57d55)
17c478bd9Sstevel@tonic-gate /*
27c478bd9Sstevel@tonic-gate  * CDDL HEADER START
37c478bd9Sstevel@tonic-gate  *
47c478bd9Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
5*7257d1b4Sraf  * Common Development and Distribution License (the "License").
6*7257d1b4Sraf  * You may not use this file except in compliance with the License.
77c478bd9Sstevel@tonic-gate  *
87c478bd9Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
97c478bd9Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
107c478bd9Sstevel@tonic-gate  * See the License for the specific language governing permissions
117c478bd9Sstevel@tonic-gate  * and limitations under the License.
127c478bd9Sstevel@tonic-gate  *
137c478bd9Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
147c478bd9Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
157c478bd9Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
167c478bd9Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
177c478bd9Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
187c478bd9Sstevel@tonic-gate  *
197c478bd9Sstevel@tonic-gate  * CDDL HEADER END
207c478bd9Sstevel@tonic-gate  */
21*7257d1b4Sraf 
227c478bd9Sstevel@tonic-gate /*
23*7257d1b4Sraf  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
247c478bd9Sstevel@tonic-gate  * Use is subject to license terms.
257c478bd9Sstevel@tonic-gate  */
267c478bd9Sstevel@tonic-gate 
27*7257d1b4Sraf #include "lint.h"
287c478bd9Sstevel@tonic-gate #include <ieeefp.h>
297c478bd9Sstevel@tonic-gate 
30*7257d1b4Sraf #pragma weak _fpsetsticky = fpsetsticky
317c478bd9Sstevel@tonic-gate 
327c478bd9Sstevel@tonic-gate extern int	_sse_hw;
337c478bd9Sstevel@tonic-gate extern void	_getsw(int *), _putsw(int), _getmxcsr(int *), _putmxcsr(int);
347c478bd9Sstevel@tonic-gate 
357c478bd9Sstevel@tonic-gate fp_except
fpsetsticky(fp_except s)367c478bd9Sstevel@tonic-gate fpsetsticky(fp_except s)
377c478bd9Sstevel@tonic-gate {
387c478bd9Sstevel@tonic-gate 	int		sw, mxcsr;
397c478bd9Sstevel@tonic-gate 
407c478bd9Sstevel@tonic-gate 	_getsw(&sw);
417c478bd9Sstevel@tonic-gate 	_putsw((int)s);
427c478bd9Sstevel@tonic-gate 	if (_sse_hw) {
437c478bd9Sstevel@tonic-gate 		_getmxcsr(&mxcsr);
447c478bd9Sstevel@tonic-gate 		sw |= mxcsr;
457c478bd9Sstevel@tonic-gate 		mxcsr = (mxcsr & ~0x3f) | ((int)s & 0x3f);
467c478bd9Sstevel@tonic-gate 		_putmxcsr(mxcsr);
477c478bd9Sstevel@tonic-gate 	}
487c478bd9Sstevel@tonic-gate 	return ((fp_except)(sw & 0x3f));
497c478bd9Sstevel@tonic-gate }
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