1 /* IEEE754 floating point arithmetic
5 * MIPS floating point support
6 * Copyright (C) 1994-2000 Algorithmics Ltd.
8 * ########################################################################
10 * This program is free software; you can distribute it and/or modify it
11 * under the terms of the GNU General Public License (Version 2) as
12 * published by the Free Software Foundation.
14 * This program is distributed in the hope it will be useful, but WITHOUT
15 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
16 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, write to the Free Software Foundation, Inc.,
21 * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
23 * ########################################################################
27 #include "ieee754sp.h"
29 ieee754sp
ieee754sp_fint(int x
)
38 return ieee754sp_zero(0);
39 if (x
== 1 || x
== -1)
40 return ieee754sp_one(x
< 0);
41 if (x
== 10 || x
== -10)
42 return ieee754sp_ten(x
< 0);
47 xm
= ((unsigned) 1 << 31); /* max neg can't be safely negated */
55 if (xm
>> (SP_MBITS
+ 1 + 3)) {
56 /* shunt out overflow bits
58 while (xm
>> (SP_MBITS
+ 1 + 3)) {
62 /* normalize in grs extended single precision
64 while ((xm
>> (SP_MBITS
+ 3)) == 0) {
69 SPNORMRET1(xs
, xe
, xm
, "fint", x
);
73 ieee754sp
ieee754sp_funs(unsigned int u
)
76 return ieee754sp_add(ieee754sp_1e31(),
77 ieee754sp_fint(u
& ~(1 << 31)));
78 return ieee754sp_fint(u
);
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