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
|
/* Macro to print floating point numbers in hexadecimal notation.
Copyright (C) 2017-2023 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.
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/>. */
#define PRINT_FPHEX(FLOAT, VAR, IEEE854_UNION, IEEE854_BIAS) \
do { \
/* We have 112 bits of mantissa plus one implicit digit. Since \
112 bits are representable without rest using hexadecimal \
digits we use only the implicit digits for the number before \
the decimal point. */ \
unsigned long long int num0, num1; \
union IEEE854_UNION u; \
u.d = VAR; \
\
assert (sizeof (FLOAT) == 16); \
\
num0 = (((unsigned long long int) u.ieee.mantissa0) << 32 \
| u.ieee.mantissa1); \
num1 = (((unsigned long long int) u.ieee.mantissa2) << 32 \
| u.ieee.mantissa3); \
\
zero_mantissa = (num0|num1) == 0; \
\
if (sizeof (unsigned long int) > 6) \
numstr = _itoa_word (num1, numbuf + sizeof numbuf, 16, \
info->spec == 'A'); \
else \
numstr = _itoa (num1, numbuf + sizeof numbuf, 16, \
info->spec == 'A'); \
\
while (numstr > numbuf + (sizeof numbuf - 64 / 4)) \
*--numstr = '0'; \
\
if (sizeof (unsigned long int) > 6) \
numstr = _itoa_word (num0, numstr, 16, info->spec == 'A'); \
else \
numstr = _itoa (num0, numstr, 16, info->spec == 'A'); \
\
/* Fill with zeroes. */ \
while (numstr > numbuf + (sizeof numbuf - 112 / 4)) \
*--numstr = '0'; \
\
leading = u.ieee.exponent == 0 ? '0' : '1'; \
\
exponent = u.ieee.exponent; \
\
if (exponent == 0) \
{ \
if (zero_mantissa) \
expnegative = 0; \
else \
{ \
/* This is a denormalized number. */ \
expnegative = 1; \
exponent = IEEE854_BIAS - 1; \
} \
} \
else if (exponent >= IEEE854_BIAS) \
{ \
expnegative = 0; \
exponent -= IEEE854_BIAS; \
} \
else \
{ \
expnegative = 1; \
exponent = -(exponent - IEEE854_BIAS); \
} \
} while (0)
|
