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
|
/* Software floating-point emulation.
Definitions for IEEE Half Precision.
Copyright (C) 1997-2023 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
In addition to the permissions in the GNU Lesser General Public
License, the Free Software Foundation gives you unlimited
permission to link the compiled version of this file into
combinations with other programs, and to distribute those
combinations without any restriction coming from the use of this
file. (The Lesser General Public License restrictions do apply in
other respects; for example, they cover modification of the file,
and distribution when not linked into a combine executable.)
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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#ifndef SOFT_FP_HALF_H
#define SOFT_FP_HALF_H 1
#if _FP_W_TYPE_SIZE < 32
# error "Here's a nickel kid. Go buy yourself a real computer."
#endif
#define _FP_FRACTBITS_H (_FP_W_TYPE_SIZE)
#define _FP_FRACTBITS_DW_H (_FP_W_TYPE_SIZE)
#define _FP_FRACBITS_H 11
#define _FP_FRACXBITS_H (_FP_FRACTBITS_H - _FP_FRACBITS_H)
#define _FP_WFRACBITS_H (_FP_WORKBITS + _FP_FRACBITS_H)
#define _FP_WFRACXBITS_H (_FP_FRACTBITS_H - _FP_WFRACBITS_H)
#define _FP_EXPBITS_H 5
#define _FP_EXPBIAS_H 15
#define _FP_EXPMAX_H 31
#define _FP_QNANBIT_H ((_FP_W_TYPE) 1 << (_FP_FRACBITS_H-2))
#define _FP_QNANBIT_SH_H ((_FP_W_TYPE) 1 << (_FP_FRACBITS_H-2+_FP_WORKBITS))
#define _FP_IMPLBIT_H ((_FP_W_TYPE) 1 << (_FP_FRACBITS_H-1))
#define _FP_IMPLBIT_SH_H ((_FP_W_TYPE) 1 << (_FP_FRACBITS_H-1+_FP_WORKBITS))
#define _FP_OVERFLOW_H ((_FP_W_TYPE) 1 << (_FP_WFRACBITS_H))
#define _FP_WFRACBITS_DW_H (2 * _FP_WFRACBITS_H)
#define _FP_WFRACXBITS_DW_H (_FP_FRACTBITS_DW_H - _FP_WFRACBITS_DW_H)
#define _FP_HIGHBIT_DW_H \
((_FP_W_TYPE) 1 << (_FP_WFRACBITS_DW_H - 1) % _FP_W_TYPE_SIZE)
/* The implementation of _FP_MUL_MEAT_H and _FP_DIV_MEAT_H should be
chosen by the target machine. */
typedef float HFtype __attribute__ ((mode (HF)));
union _FP_UNION_H
{
HFtype flt;
struct _FP_STRUCT_LAYOUT
{
#if __BYTE_ORDER == __BIG_ENDIAN
unsigned sign : 1;
unsigned exp : _FP_EXPBITS_H;
unsigned frac : _FP_FRACBITS_H - (_FP_IMPLBIT_H != 0);
#else
unsigned frac : _FP_FRACBITS_H - (_FP_IMPLBIT_H != 0);
unsigned exp : _FP_EXPBITS_H;
unsigned sign : 1;
#endif
} bits;
};
#define FP_DECL_H(X) _FP_DECL (1, X)
#define FP_UNPACK_RAW_H(X, val) _FP_UNPACK_RAW_1 (H, X, (val))
#define FP_UNPACK_RAW_HP(X, val) _FP_UNPACK_RAW_1_P (H, X, (val))
#define FP_PACK_RAW_H(val, X) _FP_PACK_RAW_1 (H, (val), X)
#define FP_PACK_RAW_HP(val, X) \
do \
{ \
if (!FP_INHIBIT_RESULTS) \
_FP_PACK_RAW_1_P (H, (val), X); \
} \
while (0)
#define FP_UNPACK_H(X, val) \
do \
{ \
_FP_UNPACK_RAW_1 (H, X, (val)); \
_FP_UNPACK_CANONICAL (H, 1, X); \
} \
while (0)
#define FP_UNPACK_HP(X, val) \
do \
{ \
_FP_UNPACK_RAW_1_P (H, X, (val)); \
_FP_UNPACK_CANONICAL (H, 1, X); \
} \
while (0)
#define FP_UNPACK_SEMIRAW_H(X, val) \
do \
{ \
_FP_UNPACK_RAW_1 (H, X, (val)); \
_FP_UNPACK_SEMIRAW (H, 1, X); \
} \
while (0)
#define FP_UNPACK_SEMIRAW_HP(X, val) \
do \
{ \
_FP_UNPACK_RAW_1_P (H, X, (val)); \
_FP_UNPACK_SEMIRAW (H, 1, X); \
} \
while (0)
#define FP_PACK_H(val, X) \
do \
{ \
_FP_PACK_CANONICAL (H, 1, X); \
_FP_PACK_RAW_1 (H, (val), X); \
} \
while (0)
#define FP_PACK_HP(val, X) \
do \
{ \
_FP_PACK_CANONICAL (H, 1, X); \
if (!FP_INHIBIT_RESULTS) \
_FP_PACK_RAW_1_P (H, (val), X); \
} \
while (0)
#define FP_PACK_SEMIRAW_H(val, X) \
do \
{ \
_FP_PACK_SEMIRAW (H, 1, X); \
_FP_PACK_RAW_1 (H, (val), X); \
} \
while (0)
#define FP_PACK_SEMIRAW_HP(val, X) \
do \
{ \
_FP_PACK_SEMIRAW (H, 1, X); \
if (!FP_INHIBIT_RESULTS) \
_FP_PACK_RAW_1_P (H, (val), X); \
} \
while (0)
#define FP_TO_INT_H(r, X, rsz, rsg) _FP_TO_INT (H, 1, (r), X, (rsz), (rsg))
#define FP_TO_INT_ROUND_H(r, X, rsz, rsg) \
_FP_TO_INT_ROUND (H, 1, (r), X, (rsz), (rsg))
#define FP_FROM_INT_H(X, r, rs, rt) _FP_FROM_INT (H, 1, X, (r), (rs), rt)
/* HFmode arithmetic is not implemented. */
#define _FP_FRAC_HIGH_H(X) _FP_FRAC_HIGH_1 (X)
#define _FP_FRAC_HIGH_RAW_H(X) _FP_FRAC_HIGH_1 (X)
#define _FP_FRAC_HIGH_DW_H(X) _FP_FRAC_HIGH_1 (X)
#define FP_CMP_EQ_H(r, X, Y, ex) _FP_CMP_EQ (H, 1, (r), X, Y, (ex))
#endif /* !SOFT_FP_HALF_H */
|
