]>
git.ipfire.org Git - thirdparty/glibc.git/blob - sysdeps/ieee754/ldbl-128/printf_fphex_macros.h
1 /* Macro to print floating point numbers in hexadecimal notation.
2 Copyright (C) 2017-2021 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
19 #define PRINT_FPHEX(FLOAT, VAR, IEEE854_UNION, IEEE854_BIAS) \
21 /* We have 112 bits of mantissa plus one implicit digit. Since \
22 112 bits are representable without rest using hexadecimal \
23 digits we use only the implicit digits for the number before \
24 the decimal point. */ \
25 unsigned long long int num0, num1; \
26 union IEEE854_UNION u; \
29 assert (sizeof (FLOAT) == 16); \
31 num0 = (((unsigned long long int) u.ieee.mantissa0) << 32 \
32 | u.ieee.mantissa1); \
33 num1 = (((unsigned long long int) u.ieee.mantissa2) << 32 \
34 | u.ieee.mantissa3); \
36 zero_mantissa = (num0|num1) == 0; \
38 if (sizeof (unsigned long int) > 6) \
40 numstr = _itoa_word (num1, numbuf + sizeof numbuf, 16, \
42 wnumstr = _itowa_word (num1, \
43 wnumbuf + sizeof (wnumbuf) / sizeof (wchar_t),\
44 16, info->spec == 'A'); \
48 numstr = _itoa (num1, numbuf + sizeof numbuf, 16, \
50 wnumstr = _itowa (num1, \
51 wnumbuf + sizeof (wnumbuf) / sizeof (wchar_t), \
52 16, info->spec == 'A'); \
55 while (numstr > numbuf + (sizeof numbuf - 64 / 4)) \
61 if (sizeof (unsigned long int) > 6) \
63 numstr = _itoa_word (num0, numstr, 16, info->spec == 'A'); \
64 wnumstr = _itowa_word (num0, wnumstr, 16, info->spec == 'A'); \
68 numstr = _itoa (num0, numstr, 16, info->spec == 'A'); \
69 wnumstr = _itowa (num0, wnumstr, 16, info->spec == 'A'); \
72 /* Fill with zeroes. */ \
73 while (numstr > numbuf + (sizeof numbuf - 112 / 4)) \
79 leading = u.ieee.exponent == 0 ? '0' : '1'; \
81 exponent = u.ieee.exponent; \
89 /* This is a denormalized number. */ \
91 exponent = IEEE854_BIAS - 1; \
94 else if (exponent >= IEEE854_BIAS) \
97 exponent -= IEEE854_BIAS; \
102 exponent = -(exponent - IEEE854_BIAS); \