mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-15 17:40:06 +00:00
688903eb3e
* All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
105 lines
3.9 KiB
C
105 lines
3.9 KiB
C
/* Macro to print floating point numbers in hexadecimal notation.
|
|
Copyright (C) 2017-2018 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
|
|
<http://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'); \
|
|
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 = 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)
|