1 /* IEEE754 floating point arithmetic
2 * double precision: common utilities
5 * MIPS floating point support
6 * Copyright (C) 1994-2000 Algorithmics Ltd.
8 * This program is free software; you can distribute it and/or modify it
9 * under the terms of the GNU General Public License (Version 2) as
10 * published by the Free Software Foundation.
12 * This program is distributed in the hope it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 * You should have received a copy of the GNU General Public License along
18 * with this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
22 #include "ieee754sp.h"
23 #include "ieee754dp.h"
25 union ieee754dp
ieee754dp_fsp(union ieee754sp x
)
36 case IEEE754_CLASS_SNAN
:
37 ieee754_setcx(IEEE754_INVALID_OPERATION
);
38 return ieee754dp_nanxcpt(ieee754dp_indef());
40 case IEEE754_CLASS_QNAN
:
41 return ieee754dp_nanxcpt(builddp(xs
,
42 DP_EMAX
+ 1 + DP_EBIAS
,
46 case IEEE754_CLASS_INF
:
47 return ieee754dp_inf(xs
);
49 case IEEE754_CLASS_ZERO
:
50 return ieee754dp_zero(xs
);
52 case IEEE754_CLASS_DNORM
:
54 while ((xm
>> SP_FBITS
) == 0) {
60 case IEEE754_CLASS_NORM
:
65 * Can't possibly overflow,underflow, or need rounding
68 /* drop the hidden bit */
71 return builddp(xs
, xe
+ DP_EBIAS
,
72 (u64
) xm
<< (DP_FBITS
- SP_FBITS
));