blob: 2fd53c920e9907ce93219b16c4b0174313194e87 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
|
/* 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"
int ieee754sp_finite(ieee754sp x)
{
return SPBEXP(x) != SP_EMAX + 1 + SP_EBIAS;
}
ieee754sp ieee754sp_copysign(ieee754sp x, ieee754sp y)
{
CLEARCX;
SPSIGN(x) = SPSIGN(y);
return x;
}
ieee754sp ieee754sp_neg(ieee754sp x)
{
COMPXSP;
EXPLODEXSP;
CLEARCX;
FLUSHXSP;
/*
* Invert the sign ALWAYS to prevent an endless recursion on
* pow() in libc.
*/
/* quick fix up */
SPSIGN(x) ^= 1;
if (xc == IEEE754_CLASS_SNAN) {
ieee754sp y = ieee754sp_indef();
SETCX(IEEE754_INVALID_OPERATION);
SPSIGN(y) = SPSIGN(x);
return ieee754sp_nanxcpt(y, "neg");
}
return x;
}
ieee754sp ieee754sp_abs(ieee754sp x)
{
COMPXSP;
EXPLODEXSP;
CLEARCX;
FLUSHXSP;
/* Clear sign ALWAYS, irrespective of NaN */
SPSIGN(x) = 0;
if (xc == IEEE754_CLASS_SNAN) {
SETCX(IEEE754_INVALID_OPERATION);
return ieee754sp_nanxcpt(ieee754sp_indef(), "abs");
}
return x;
}
|
