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
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
|
/* Software floating-point emulation.
Definitions for IEEE Double Precision
Copyright (C) 1997,1998,1999 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Richard Henderson (rth@cygnus.com),
Jakub Jelinek (jj@ultra.linux.cz),
David S. Miller (davem@redhat.com) and
Peter Maydell (pmaydell@chiark.greenend.org.uk).
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc.,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#if _FP_W_TYPE_SIZE < 32
#error "Here's a nickel kid. Go buy yourself a real computer."
#endif
#if _FP_W_TYPE_SIZE < 64
#define _FP_FRACTBITS_D (2 * _FP_W_TYPE_SIZE)
#else
#define _FP_FRACTBITS_D _FP_W_TYPE_SIZE
#endif
#define _FP_FRACBITS_D 53
#define _FP_FRACXBITS_D (_FP_FRACTBITS_D - _FP_FRACBITS_D)
#define _FP_WFRACBITS_D (_FP_WORKBITS + _FP_FRACBITS_D)
#define _FP_WFRACXBITS_D (_FP_FRACTBITS_D - _FP_WFRACBITS_D)
#define _FP_EXPBITS_D 11
#define _FP_EXPBIAS_D 1023
#define _FP_EXPMAX_D 2047
#define _FP_QNANBIT_D \
((_FP_W_TYPE)1 << (_FP_FRACBITS_D-2) % _FP_W_TYPE_SIZE)
#define _FP_IMPLBIT_D \
((_FP_W_TYPE)1 << (_FP_FRACBITS_D-1) % _FP_W_TYPE_SIZE)
#define _FP_OVERFLOW_D \
((_FP_W_TYPE)1 << _FP_WFRACBITS_D % _FP_W_TYPE_SIZE)
#if _FP_W_TYPE_SIZE < 64
union _FP_UNION_D
{
double flt;
struct {
#if __BYTE_ORDER == __BIG_ENDIAN
unsigned sign : 1;
unsigned exp : _FP_EXPBITS_D;
unsigned frac1 : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0) - _FP_W_TYPE_SIZE;
unsigned frac0 : _FP_W_TYPE_SIZE;
#else
unsigned frac0 : _FP_W_TYPE_SIZE;
unsigned frac1 : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0) - _FP_W_TYPE_SIZE;
unsigned exp : _FP_EXPBITS_D;
unsigned sign : 1;
#endif
} bits __attribute__((packed));
};
#define FP_DECL_D(X) _FP_DECL(2,X)
#define FP_UNPACK_RAW_D(X,val) _FP_UNPACK_RAW_2(D,X,val)
#define FP_UNPACK_RAW_DP(X,val) _FP_UNPACK_RAW_2_P(D,X,val)
#define FP_PACK_RAW_D(val,X) _FP_PACK_RAW_2(D,val,X)
#define FP_PACK_RAW_DP(val,X) \
do { \
if (!FP_INHIBIT_RESULTS) \
_FP_PACK_RAW_2_P(D,val,X); \
} while (0)
#define FP_UNPACK_D(X,val) \
do { \
_FP_UNPACK_RAW_2(D,X,val); \
_FP_UNPACK_CANONICAL(D,2,X); \
} while (0)
#define FP_UNPACK_DP(X,val) \
do { \
_FP_UNPACK_RAW_2_P(D,X,val); \
_FP_UNPACK_CANONICAL(D,2,X); \
} while (0)
#define FP_PACK_D(val,X) \
do { \
_FP_PACK_CANONICAL(D,2,X); \
_FP_PACK_RAW_2(D,val,X); \
} while (0)
#define FP_PACK_DP(val,X) \
do { \
_FP_PACK_CANONICAL(D,2,X); \
if (!FP_INHIBIT_RESULTS) \
_FP_PACK_RAW_2_P(D,val,X); \
} while (0)
#define FP_ISSIGNAN_D(X) _FP_ISSIGNAN(D,2,X)
#define FP_NEG_D(R,X) _FP_NEG(D,2,R,X)
#define FP_ADD_D(R,X,Y) _FP_ADD(D,2,R,X,Y)
#define FP_SUB_D(R,X,Y) _FP_SUB(D,2,R,X,Y)
#define FP_MUL_D(R,X,Y) _FP_MUL(D,2,R,X,Y)
#define FP_DIV_D(R,X,Y) _FP_DIV(D,2,R,X,Y)
#define FP_SQRT_D(R,X) _FP_SQRT(D,2,R,X)
#define _FP_SQRT_MEAT_D(R,S,T,X,Q) _FP_SQRT_MEAT_2(R,S,T,X,Q)
#define FP_CMP_D(r,X,Y,un) _FP_CMP(D,2,r,X,Y,un)
#define FP_CMP_EQ_D(r,X,Y) _FP_CMP_EQ(D,2,r,X,Y)
#define FP_TO_INT_D(r,X,rsz,rsg) _FP_TO_INT(D,2,r,X,rsz,rsg)
#define FP_FROM_INT_D(X,r,rs,rt) _FP_FROM_INT(D,2,X,r,rs,rt)
#define _FP_FRAC_HIGH_D(X) _FP_FRAC_HIGH_2(X)
#define _FP_FRAC_HIGH_RAW_D(X) _FP_FRAC_HIGH_2(X)
#else
union _FP_UNION_D
{
double flt;
struct {
#if __BYTE_ORDER == __BIG_ENDIAN
unsigned sign : 1;
unsigned exp : _FP_EXPBITS_D;
unsigned long frac : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0);
#else
unsigned long frac : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0);
unsigned exp : _FP_EXPBITS_D;
unsigned sign : 1;
#endif
} bits __attribute__((packed));
};
#define FP_DECL_D(X) _FP_DECL(1,X)
#define FP_UNPACK_RAW_D(X,val) _FP_UNPACK_RAW_1(D,X,val)
#define FP_UNPACK_RAW_DP(X,val) _FP_UNPACK_RAW_1_P(D,X,val)
#define FP_PACK_RAW_D(val,X) _FP_PACK_RAW_1(D,val,X)
#define FP_PACK_RAW_DP(val,X) \
do { \
if (!FP_INHIBIT_RESULTS) \
_FP_PACK_RAW_1_P(D,val,X); \
} while (0)
#define FP_UNPACK_D(X,val) \
do { \
_FP_UNPACK_RAW_1(D,X,val); \
_FP_UNPACK_CANONICAL(D,1,X); \
} while (0)
#define FP_UNPACK_DP(X,val) \
do { \
_FP_UNPACK_RAW_1_P(D,X,val); \
_FP_UNPACK_CANONICAL(D,1,X); \
} while (0)
#define FP_PACK_D(val,X) \
do { \
_FP_PACK_CANONICAL(D,1,X); \
_FP_PACK_RAW_1(D,val,X); \
} while (0)
#define FP_PACK_DP(val,X) \
do { \
_FP_PACK_CANONICAL(D,1,X); \
if (!FP_INHIBIT_RESULTS) \
_FP_PACK_RAW_1_P(D,val,X); \
} while (0)
#define FP_ISSIGNAN_D(X) _FP_ISSIGNAN(D,1,X)
#define FP_NEG_D(R,X) _FP_NEG(D,1,R,X)
#define FP_ADD_D(R,X,Y) _FP_ADD(D,1,R,X,Y)
#define FP_SUB_D(R,X,Y) _FP_SUB(D,1,R,X,Y)
#define FP_MUL_D(R,X,Y) _FP_MUL(D,1,R,X,Y)
#define FP_DIV_D(R,X,Y) _FP_DIV(D,1,R,X,Y)
#define FP_SQRT_D(R,X) _FP_SQRT(D,1,R,X)
#define _FP_SQRT_MEAT_D(R,S,T,X,Q) _FP_SQRT_MEAT_1(R,S,T,X,Q)
/* The implementation of _FP_MUL_D and _FP_DIV_D should be chosen by
the target machine. */
#define FP_CMP_D(r,X,Y,un) _FP_CMP(D,1,r,X,Y,un)
#define FP_CMP_EQ_D(r,X,Y) _FP_CMP_EQ(D,1,r,X,Y)
#define FP_TO_INT_D(r,X,rsz,rsg) _FP_TO_INT(D,1,r,X,rsz,rsg)
#define FP_FROM_INT_D(X,r,rs,rt) _FP_FROM_INT(D,1,X,r,rs,rt)
#define _FP_FRAC_HIGH_D(X) _FP_FRAC_HIGH_1(X)
#define _FP_FRAC_HIGH_RAW_D(X) _FP_FRAC_HIGH_1(X)
#endif /* W_TYPE_SIZE < 64 */
|
