projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| d5efd131 | 1 | /* Print floating point number in hexadecimal notation according to ISO C99. |
| dff8da6b | 2 | Copyright (C) 2000-2024 Free Software Foundation, Inc. |
| d5efd131 MF |
3 | This file is part of the GNU C Library. |
| 4 | ||
| 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. | |
| 9 | ||
| 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. | |
| 14 | ||
| 15 | You should have received a copy of the GNU Lesser General Public | |
| 75efb018 | 16 | License along with the GNU C Library; if not, see |
| 5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
| d5efd131 MF |
18 | |
| 19 | #ifndef LONG_DOUBLE_DENORM_BIAS | |
| 20 | # define LONG_DOUBLE_DENORM_BIAS (IEEE854_LONG_DOUBLE_BIAS - 1) | |
| 21 | #endif | |
| 22 | ||
| 23 | #define PRINT_FPHEX_LONG_DOUBLE \ | |
| 24 | do { \ | |
| 25 | /* The "strange" 80 bit format on ia64 has an explicit \ | |
| 26 | leading digit in the 64 bit mantissa. */ \ | |
| 27 | unsigned long long int num; \ | |
| 1b6adf88 AM |
28 | union ieee854_long_double u; \ |
| 29 | u.d = fpnum.ldbl; \ | |
| d5efd131 | 30 | \ |
| 1b6adf88 AM |
31 | num = (((unsigned long long int) u.ieee.mantissa0) << 32 \ |
| 32 | | u.ieee.mantissa1); \ | |
| d5efd131 MF |
33 | \ |
| 34 | zero_mantissa = num == 0; \ | |
| 35 | \ | |
| 36 | numstr = _itoa_word (num, numbuf + sizeof numbuf, 16, \ | |
| 37 | info->spec == 'A'); \ | |
| d5efd131 MF |
38 | \ |
| 39 | /* Fill with zeroes. */ \ | |
| 40 | while (numstr > numbuf + (sizeof numbuf - 64 / 4)) \ | |
| e88b9f0e | 41 | *--numstr = '0'; \ |
| d5efd131 MF |
42 | \ |
| 43 | /* We use a full nibble for the leading digit. */ \ | |
| 44 | leading = *numstr++; \ | |
| 45 | \ | |
| 46 | /* We have 3 bits from the mantissa in the leading nibble. \ | |
| 47 | Therefore we are here using `IEEE854_LONG_DOUBLE_BIAS + 3'. */ \ | |
| 1b6adf88 AM |
48 | exponent = u.ieee.exponent; \ |
| 49 | \ | |
| d5efd131 MF |
50 | if (exponent == 0) \ |
| 51 | { \ | |
| 52 | if (zero_mantissa) \ | |
| 53 | expnegative = 0; \ | |
| 54 | else \ | |
| 55 | { \ | |
| 56 | /* This is a denormalized number. */ \ | |
| 57 | expnegative = 1; \ | |
| 58 | /* This is a hook for the m68k long double format, where the \ | |
| 59 | exponent bias is the same for normalized and denormalized \ | |
| 60 | numbers. */ \ | |
| 61 | exponent = LONG_DOUBLE_DENORM_BIAS + 3; \ | |
| 62 | } \ | |
| 63 | } \ | |
| 64 | else if (exponent >= IEEE854_LONG_DOUBLE_BIAS + 3) \ | |
| 65 | { \ | |
| 66 | expnegative = 0; \ | |
| 67 | exponent -= IEEE854_LONG_DOUBLE_BIAS + 3; \ | |
| 68 | } \ | |
| 69 | else \ | |
| 70 | { \ | |
| 71 | expnegative = 1; \ | |
| 72 | exponent = -(exponent - (IEEE854_LONG_DOUBLE_BIAS + 3)); \ | |
| 73 | } \ | |
| 74 | } while (0) | |
| 75 | ||
| 76 | #include <stdio-common/printf_fphex.c> |