| 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081 |
- /* Print floating point number in hexadecimal notation according to ISO C99.
- Copyright (C) 1997-2026 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/>. */
- #ifndef LONG_DOUBLE_DENORM_BIAS
- # define LONG_DOUBLE_DENORM_BIAS (IEEE854_LONG_DOUBLE_BIAS - 1)
- #endif
- #define PRINT_FPHEX_LONG_DOUBLE \
- do { \
- /* The "strange" 80 bit format on ix86 and m68k has an explicit \
- leading digit in the 64 bit mantissa. */ \
- unsigned long long int num; \
- union ieee854_long_double u; \
- u.d = fpnum.ldbl; \
- \
- assert (sizeof (long double) == 12); \
- \
- num = (((unsigned long long int) u.ieee.mantissa0) << 32 \
- | u.ieee.mantissa1); \
- \
- zero_mantissa = num == 0; \
- \
- if (sizeof (unsigned long int) > 6) \
- numstr = _itoa_word (num, numbuf + sizeof numbuf, 16, \
- info->spec == 'A'); \
- else \
- numstr = _itoa (num, numbuf + sizeof numbuf, 16, info->spec == 'A'); \
- \
- /* Fill with zeroes. */ \
- while (numstr > numbuf + (sizeof numbuf - 64 / 4)) \
- *--numstr = '0'; \
- \
- /* We use a full nibble for the leading digit. */ \
- leading = *numstr++; \
- \
- /* We have 3 bits from the mantissa in the leading nibble. \
- Therefore we are here using `IEEE854_LONG_DOUBLE_BIAS + 3'. */ \
- exponent = u.ieee.exponent; \
- \
- if (exponent == 0) \
- { \
- if (zero_mantissa) \
- expnegative = 0; \
- else \
- { \
- /* This is a denormalized number. */ \
- expnegative = 1; \
- /* This is a hook for the m68k long double format, where the \
- exponent bias is the same for normalized and denormalized \
- numbers. */ \
- exponent = LONG_DOUBLE_DENORM_BIAS + 3; \
- } \
- } \
- else if (exponent >= IEEE854_LONG_DOUBLE_BIAS + 3) \
- { \
- expnegative = 0; \
- exponent -= IEEE854_LONG_DOUBLE_BIAS + 3; \
- } \
- else \
- { \
- expnegative = 1; \
- exponent = -(exponent - (IEEE854_LONG_DOUBLE_BIAS + 3)); \
- } \
- } while (0)
- #include <stdio-common/printf_fphex.c>
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