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
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
|
/*
* IEEE754 floating point
* common internal header file
*/
/*
* 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.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef __IEEE754INT_H
#define __IEEE754INT_H
#include "ieee754.h"
#define CLPAIR(x, y) ((x)*6+(y))
static inline void ieee754_clearcx(void)
{
ieee754_csr.cx = 0;
}
static inline void ieee754_setcx(const unsigned int flags)
{
ieee754_csr.cx |= flags;
ieee754_csr.sx |= flags;
}
static inline int ieee754_setandtestcx(const unsigned int x)
{
ieee754_setcx(x);
return ieee754_csr.mx & x;
}
static inline int ieee754_class_nan(int xc)
{
return xc >= IEEE754_CLASS_SNAN;
}
#define COMPXSP \
unsigned xm; int xe; int xs __maybe_unused; int xc
#define COMPYSP \
unsigned ym; int ye; int ys; int yc
#define EXPLODESP(v, vc, vs, ve, vm) \
{ \
vs = SPSIGN(v); \
ve = SPBEXP(v); \
vm = SPMANT(v); \
if (ve == SP_EMAX+1+SP_EBIAS) { \
if (vm == 0) \
vc = IEEE754_CLASS_INF; \
else if (ieee754_csr.nan2008 ^ !(vm & SP_MBIT(SP_FBITS - 1))) \
vc = IEEE754_CLASS_QNAN; \
else \
vc = IEEE754_CLASS_SNAN; \
} else if (ve == SP_EMIN-1+SP_EBIAS) { \
if (vm) { \
ve = SP_EMIN; \
vc = IEEE754_CLASS_DNORM; \
} else \
vc = IEEE754_CLASS_ZERO; \
} else { \
ve -= SP_EBIAS; \
vm |= SP_HIDDEN_BIT; \
vc = IEEE754_CLASS_NORM; \
} \
}
#define EXPLODEXSP EXPLODESP(x, xc, xs, xe, xm)
#define EXPLODEYSP EXPLODESP(y, yc, ys, ye, ym)
#define COMPXDP \
u64 xm; int xe; int xs __maybe_unused; int xc
#define COMPYDP \
u64 ym; int ye; int ys; int yc
#define EXPLODEDP(v, vc, vs, ve, vm) \
{ \
vm = DPMANT(v); \
vs = DPSIGN(v); \
ve = DPBEXP(v); \
if (ve == DP_EMAX+1+DP_EBIAS) { \
if (vm == 0) \
vc = IEEE754_CLASS_INF; \
else if (ieee754_csr.nan2008 ^ !(vm & DP_MBIT(DP_FBITS - 1))) \
vc = IEEE754_CLASS_QNAN; \
else \
vc = IEEE754_CLASS_SNAN; \
} else if (ve == DP_EMIN-1+DP_EBIAS) { \
if (vm) { \
ve = DP_EMIN; \
vc = IEEE754_CLASS_DNORM; \
} else \
vc = IEEE754_CLASS_ZERO; \
} else { \
ve -= DP_EBIAS; \
vm |= DP_HIDDEN_BIT; \
vc = IEEE754_CLASS_NORM; \
} \
}
#define EXPLODEXDP EXPLODEDP(x, xc, xs, xe, xm)
#define EXPLODEYDP EXPLODEDP(y, yc, ys, ye, ym)
#define FLUSHDP(v, vc, vs, ve, vm) \
if (vc==IEEE754_CLASS_DNORM) { \
if (ieee754_csr.nod) { \
ieee754_setcx(IEEE754_INEXACT); \
vc = IEEE754_CLASS_ZERO; \
ve = DP_EMIN-1+DP_EBIAS; \
vm = 0; \
v = ieee754dp_zero(vs); \
} \
}
#define FLUSHSP(v, vc, vs, ve, vm) \
if (vc==IEEE754_CLASS_DNORM) { \
if (ieee754_csr.nod) { \
ieee754_setcx(IEEE754_INEXACT); \
vc = IEEE754_CLASS_ZERO; \
ve = SP_EMIN-1+SP_EBIAS; \
vm = 0; \
v = ieee754sp_zero(vs); \
} \
}
#define FLUSHXDP FLUSHDP(x, xc, xs, xe, xm)
#define FLUSHYDP FLUSHDP(y, yc, ys, ye, ym)
#define FLUSHXSP FLUSHSP(x, xc, xs, xe, xm)
#define FLUSHYSP FLUSHSP(y, yc, ys, ye, ym)
#endif /* __IEEE754INT_H */
|
