/*
* 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 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include "lint.h"
#include "base_conversion.h"
#include <sys/isa_defs.h>
#define CSR_DEFAULT 0x1f80
/* The following should be coded as inline expansion templates. */
/*
* Multiplies two normal or subnormal doubles, returns result and exceptions.
*/
double
__mul_set(double x, double y, int *pe) {
extern void _putmxcsr(), _getmxcsr();
int csr;
double z;
_putmxcsr(CSR_DEFAULT);
z = x * y;
_getmxcsr(&csr);
if ((csr & 0x3f) == 0) {
*pe = 0;
} else {
/* Result may not be exact. */
*pe = 1;
}
return (z);
}
/*
* Divides two normal or subnormal doubles x/y, returns result and exceptions.
*/
double
__div_set(double x, double y, int *pe) {
extern void _putmxcsr(), _getmxcsr();
int csr;
double z;
_putmxcsr(CSR_DEFAULT);
z = x / y;
_getmxcsr(&csr);
if ((csr & 0x3f) == 0) {
*pe = 0;
} else {
*pe = 1;
}
return (z);
}
double
__dabs(double *d)
{
/* should use hardware fabs instruction */
return ((*d < 0.0) ? -*d : *d);
}
/*
* Returns IEEE mode/status and
* sets up standard environment for base conversion.
*/
void
__get_ieee_flags(__ieee_flags_type *b) {
extern void _getmxcsr(), _putmxcsr();
_getmxcsr(&b->status);
/* round-to-nearest, all exceptions masked, gradual underflow */
_putmxcsr(CSR_DEFAULT);
}
/*
* Restores previous IEEE mode/status
*/
void
__set_ieee_flags(__ieee_flags_type *b) {
extern void _putmxcsr();
_putmxcsr(b->status);
}