feround.c revision 25c28e83beb90e7c80452a7c818c5e6f73a07dc8
/*
* 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 2011 Nexenta Systems, Inc. All rights reserved.
*/
/*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma weak fegetround = __fegetround
#pragma weak fesetround = __fesetround
#pragma weak fegetround96 = __fegetround
#pragma weak fesetround96 = __fesetround96
#include "fenv_synonyms.h"
#include <fenv.h>
#include <ucontext.h>
#include <thread.h>
#include "fex_handler.h"
#include "fenv_inlines.h"
#if defined(__i386) && !defined(__amd64)
#include <float.h>
#endif
int fegetround(void)
{
unsigned long fsr;
__fenv_getfsr(&fsr);
return (int)__fenv_get_rd(fsr);
}
int fesetround(int r)
{
unsigned long fsr;
if (r & ~3)
return -1;
__fenv_getfsr(&fsr);
__fenv_set_rd(fsr, r);
__fenv_setfsr(&fsr);
#if defined(__i386) && !defined(__amd64)
FLT_ROUNDS = (0x2D >> (r << 1)) & 3; /* 0->1, 1->3, 2->2, 3->0 */
#endif
return 0;
}
int fesetround96(int r)
{
unsigned long fsr;
if (r & ~3)
return 0;
__fenv_getfsr(&fsr);
__fenv_set_rd(fsr, r);
__fenv_setfsr(&fsr);
#if defined(__i386) && !defined(__amd64)
FLT_ROUNDS = (0x2D >> (r << 1)) & 3; /* 0->1, 1->3, 2->2, 3->0 */
#endif
return 1;
}