| 1 | /* Print floating point number in hexadecimal notation according to ISO C99. |
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| 2 | Copyright (C) 1997-2022 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; if not, see |
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| 17 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | #ifndef LONG_DOUBLE_DENORM_BIAS |
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| 20 | # define LONG_DOUBLE_DENORM_BIAS (IEEE854_LONG_DOUBLE_BIAS - 1) |
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| 21 | #endif |
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| 22 | |
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| 23 | #define PRINT_FPHEX_LONG_DOUBLE \ |
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| 24 | do { \ |
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| 25 | /* The "strange" 80 bit format on ix86 and m68k has an explicit \ |
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| 26 | leading digit in the 64 bit mantissa. */ \ |
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| 27 | unsigned long long int num; \ |
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| 28 | union ieee854_long_double u; \ |
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| 29 | u.d = fpnum.ldbl; \ |
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| 30 | \ |
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| 31 | num = (((unsigned long long int) u.ieee.mantissa0) << 32 \ |
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| 32 | | u.ieee.mantissa1); \ |
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| 33 | \ |
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| 34 | zero_mantissa = num == 0; \ |
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| 35 | \ |
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| 36 | if (sizeof (unsigned long int) > 6) \ |
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| 37 | { \ |
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| 38 | numstr = _itoa_word (num, numbuf + sizeof numbuf, 16, \ |
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| 39 | info->spec == 'A'); \ |
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| 40 | wnumstr = _itowa_word (num, \ |
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| 41 | wnumbuf + sizeof (wnumbuf) / sizeof (wchar_t),\ |
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| 42 | 16, info->spec == 'A'); \ |
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| 43 | } \ |
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| 44 | else \ |
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| 45 | { \ |
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| 46 | numstr = _itoa (num, numbuf + sizeof numbuf, 16, info->spec == 'A');\ |
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| 47 | wnumstr = _itowa (num, \ |
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| 48 | wnumbuf + sizeof (wnumbuf) / sizeof (wchar_t), \ |
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| 49 | 16, info->spec == 'A'); \ |
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| 50 | } \ |
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| 51 | \ |
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| 52 | /* Fill with zeroes. */ \ |
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| 53 | while (numstr > numbuf + (sizeof numbuf - 64 / 4)) \ |
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| 54 | { \ |
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| 55 | *--numstr = '0'; \ |
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| 56 | *--wnumstr = L'0'; \ |
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| 57 | } \ |
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| 58 | \ |
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| 59 | /* We use a full nibble for the leading digit. */ \ |
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| 60 | leading = *numstr++; \ |
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| 61 | wnumstr++; \ |
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| 62 | \ |
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| 63 | /* We have 3 bits from the mantissa in the leading nibble. \ |
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| 64 | Therefore we are here using `IEEE854_LONG_DOUBLE_BIAS + 3'. */ \ |
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| 65 | exponent = u.ieee.exponent; \ |
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| 66 | \ |
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| 67 | if (exponent == 0) \ |
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| 68 | { \ |
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| 69 | if (zero_mantissa) \ |
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| 70 | expnegative = 0; \ |
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| 71 | else \ |
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| 72 | { \ |
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| 73 | /* This is a denormalized number. */ \ |
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| 74 | expnegative = 1; \ |
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| 75 | /* This is a hook for the m68k long double format, where the \ |
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| 76 | exponent bias is the same for normalized and denormalized \ |
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| 77 | numbers. */ \ |
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| 78 | exponent = LONG_DOUBLE_DENORM_BIAS + 3; \ |
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| 79 | } \ |
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| 80 | } \ |
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| 81 | else if (exponent >= IEEE854_LONG_DOUBLE_BIAS + 3) \ |
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| 82 | { \ |
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| 83 | expnegative = 0; \ |
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| 84 | exponent -= IEEE854_LONG_DOUBLE_BIAS + 3; \ |
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| 85 | } \ |
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| 86 | else \ |
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| 87 | { \ |
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| 88 | expnegative = 1; \ |
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| 89 | exponent = -(exponent - (IEEE854_LONG_DOUBLE_BIAS + 3)); \ |
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| 90 | } \ |
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| 91 | } while (0) |
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| 92 | |
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| 93 | #include <stdio-common/printf_fphex.c> |
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| 94 | |
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