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
|
/* Print floating point number in hexadecimal notation according to ISO C99.
Copyright (C) 1997,1998,1999,2000,2001,2002,2004,2006,2007
Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#define PRINT_FPHEX_LONG_DOUBLE \
do { \
/* We have 105 bits of mantissa plus one implicit digit. Since \
106 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; \
unsigned long long hi, lo; \
int ediff; \
union ibm_extended_long_double eldbl; \
eldbl.d = fpnum.ldbl.d; \
\
assert (sizeof (long double) == 16); \
\
lo = ((long long)eldbl.ieee.mantissa2 << 32) | eldbl.ieee.mantissa3; \
hi = ((long long)eldbl.ieee.mantissa0 << 32) | eldbl.ieee.mantissa1; \
lo <<= 7; /* pre-shift lo to match ieee854. */ \
/* If the lower double is not a denomal or zero then set the hidden \
53rd bit. */ \
if (eldbl.ieee.exponent2 != 0) \
lo |= (1ULL << (52 + 7)); \
else \
lo <<= 1; \
/* The lower double is normalized separately from the upper. We \
may need to adjust the lower manitissa to reflect this. */ \
ediff = eldbl.ieee.exponent - eldbl.ieee.exponent2; \
if (ediff > 53 + 63) \
lo = 0; \
else if (ediff > 53) \
lo = lo >> (ediff - 53); \
else if (eldbl.ieee.exponent2 == 0 && ediff < 53) \
lo = lo << (53 - ediff); \
if (eldbl.ieee.negative != eldbl.ieee.negative2 \
&& (eldbl.ieee.exponent2 != 0 || lo != 0L)) \
{ \
lo = (1ULL << 60) - lo; \
if (hi == 0L) \
{ \
/* we have a borrow from the hidden bit, so shift left 1. */ \
hi = 0xffffffffffffeLL | (lo >> 59); \
lo = 0xfffffffffffffffLL & (lo << 1); \
eldbl.ieee.exponent--; \
} \
else \
hi--; \
} \
num1 = (hi << 60) | lo; \
num0 = hi >> 4; \
\
zero_mantissa = (num0|num1) == 0; \
\
if (sizeof (unsigned long int) > 6) \
{ \
numstr = _itoa_word (num1, numbuf + sizeof numbuf, 16, \
info->spec == 'A'); \
wnumstr = _itowa_word (num1, \
wnumbuf + sizeof (wnumbuf) / sizeof (wchar_t),\
16, info->spec == 'A'); \
} \
else \
{ \
numstr = _itoa (num1, numbuf + sizeof numbuf, 16, \
info->spec == 'A'); \
wnumstr = _itowa (num1, \
wnumbuf + sizeof (wnumbuf) / sizeof (wchar_t), \
16, info->spec == 'A'); \
} \
\
while (numstr > numbuf + (sizeof numbuf - 64 / 4)) \
{ \
*--numstr = '0'; \
*--wnumstr = L'0'; \
} \
\
if (sizeof (unsigned long int) > 6) \
{ \
numstr = _itoa_word (num0, numstr, 16, info->spec == 'A'); \
wnumstr = _itowa_word (num0, wnumstr, 16, info->spec == 'A'); \
} \
else \
{ \
numstr = _itoa (num0, numstr, 16, info->spec == 'A'); \
wnumstr = _itowa (num0, wnumstr, 16, info->spec == 'A'); \
} \
\
/* Fill with zeroes. */ \
while (numstr > numbuf + (sizeof numbuf - 112 / 4)) \
{ \
*--numstr = '0'; \
*--wnumstr = L'0'; \
} \
\
leading = eldbl.ieee.exponent == 0 ? '0' : '1'; \
\
exponent = eldbl.ieee.exponent; \
\
if (exponent == 0) \
{ \
if (zero_mantissa) \
expnegative = 0; \
else \
{ \
/* This is a denormalized number. */ \
expnegative = 1; \
exponent = IBM_EXTENDED_LONG_DOUBLE_BIAS - 1; \
} \
} \
else if (exponent >= IBM_EXTENDED_LONG_DOUBLE_BIAS) \
{ \
expnegative = 0; \
exponent -= IBM_EXTENDED_LONG_DOUBLE_BIAS; \
} \
else \
{ \
expnegative = 1; \
exponent = -(exponent - IBM_EXTENDED_LONG_DOUBLE_BIAS); \
} \
} while (0)
#include <stdio-common/printf_fphex.c>
|
GitWeb