25985edced
Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
73 lines
1.8 KiB
C
73 lines
1.8 KiB
C
/* IEEE754 floating point arithmetic
|
|
* double precision: common utilities
|
|
*/
|
|
/*
|
|
* MIPS floating point support
|
|
* Copyright (C) 1994-2000 Algorithmics Ltd.
|
|
*
|
|
* ########################################################################
|
|
*
|
|
* 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 "ieee754dp.h"
|
|
|
|
ieee754dp ieee754dp_fsp(ieee754sp x)
|
|
{
|
|
COMPXSP;
|
|
|
|
EXPLODEXSP;
|
|
|
|
CLEARCX;
|
|
|
|
FLUSHXSP;
|
|
|
|
switch (xc) {
|
|
case IEEE754_CLASS_SNAN:
|
|
SETCX(IEEE754_INVALID_OPERATION);
|
|
return ieee754dp_nanxcpt(ieee754dp_indef(), "fsp");
|
|
case IEEE754_CLASS_QNAN:
|
|
return ieee754dp_nanxcpt(builddp(xs,
|
|
DP_EMAX + 1 + DP_EBIAS,
|
|
((u64) xm
|
|
<< (DP_MBITS -
|
|
SP_MBITS))), "fsp",
|
|
x);
|
|
case IEEE754_CLASS_INF:
|
|
return ieee754dp_inf(xs);
|
|
case IEEE754_CLASS_ZERO:
|
|
return ieee754dp_zero(xs);
|
|
case IEEE754_CLASS_DNORM:
|
|
/* normalize */
|
|
while ((xm >> SP_MBITS) == 0) {
|
|
xm <<= 1;
|
|
xe--;
|
|
}
|
|
break;
|
|
case IEEE754_CLASS_NORM:
|
|
break;
|
|
}
|
|
|
|
/* CAN'T possibly overflow,underflow, or need rounding
|
|
*/
|
|
|
|
/* drop the hidden bit */
|
|
xm &= ~SP_HIDDEN_BIT;
|
|
|
|
return builddp(xs, xe + DP_EBIAS,
|
|
(u64) xm << (DP_MBITS - SP_MBITS));
|
|
}
|