You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
54 lines
1.4 KiB
54 lines
1.4 KiB
20 years ago
|
/* IEEE754 floating point arithmetic
|
||
|
|
* single precision
|
||
|
|
*/
|
||
|
|
/*
|
||
|
|
* MIPS floating point support
|
||
|
|
* Copyright (C) 1994-2000 Algorithmics Ltd.
|
||
|
|
* http://www.algor.co.uk
|
||
|
|
*
|
||
|
|
* ########################################################################
|
||
|
|
*
|
||
|
|
* This program is free software; you can distribute it and/or modify it
|
||
|
|
* under the terms of the GNU General Public License (Version 2) as
|
||
|
|
* published by the Free Software Foundation.
|
||
|
|
*
|
||
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
||
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
||
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
||
|
|
* for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU General Public License along
|
||
|
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
||
|
|
* 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
|
||
|
|
*
|
||
|
|
* ########################################################################
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
#include "ieee754sp.h"
|
||
|
|
|
||
|
|
/* close to ieeep754sp_logb
|
||
|
|
*/
|
||
|
|
ieee754sp ieee754sp_frexp(ieee754sp x, int *eptr)
|
||
|
|
{
|
||
|
|
COMPXSP;
|
||
|
|
CLEARCX;
|
||
|
|
EXPLODEXSP;
|
||
|
|
|
||
|
|
switch (xc) {
|
||
|
|
case IEEE754_CLASS_SNAN:
|
||
|
|
case IEEE754_CLASS_QNAN:
|
||
|
|
case IEEE754_CLASS_INF:
|
||
|
|
case IEEE754_CLASS_ZERO:
|
||
|
|
*eptr = 0;
|
||
|
|
return x;
|
||
|
|
case IEEE754_CLASS_DNORM:
|
||
|
|
SPDNORMX;
|
||
|
|
break;
|
||
|
|
case IEEE754_CLASS_NORM:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
*eptr = xe + 1;
|
||
|
|
return buildsp(xs, -1 + SP_EBIAS, xm & ~SP_HIDDEN_BIT);
|
||
|
|
}
|