| 1 | /* Macro to print floating point numbers in hexadecimal notation. |
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| 2 | Copyright (C) 2017-2024 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 | #define PRINT_FPHEX(FLOAT, VAR, IEEE854_UNION, IEEE854_BIAS) \ |
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| 20 | do { \ |
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| 21 | /* We have 112 bits of mantissa plus one implicit digit. Since \ |
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| 22 | 112 bits are representable without rest using hexadecimal \ |
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| 23 | digits we use only the implicit digits for the number before \ |
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| 24 | the decimal point. */ \ |
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| 25 | unsigned long long int num0, num1; \ |
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| 26 | union IEEE854_UNION u; \ |
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| 27 | u.d = VAR; \ |
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| 28 | \ |
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| 29 | assert (sizeof (FLOAT) == 16); \ |
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| 30 | \ |
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| 31 | num0 = (((unsigned long long int) u.ieee.mantissa0) << 32 \ |
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| 32 | | u.ieee.mantissa1); \ |
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| 33 | num1 = (((unsigned long long int) u.ieee.mantissa2) << 32 \ |
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| 34 | | u.ieee.mantissa3); \ |
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| 35 | \ |
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| 36 | zero_mantissa = (num0|num1) == 0; \ |
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| 37 | \ |
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| 38 | if (sizeof (unsigned long int) > 6) \ |
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| 39 | numstr = _itoa_word (num1, numbuf + sizeof numbuf, 16, \ |
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| 40 | info->spec == 'A'); \ |
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| 41 | else \ |
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| 42 | numstr = _itoa (num1, numbuf + sizeof numbuf, 16, \ |
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| 43 | info->spec == 'A'); \ |
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| 44 | \ |
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| 45 | while (numstr > numbuf + (sizeof numbuf - 64 / 4)) \ |
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| 46 | *--numstr = '0'; \ |
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| 47 | \ |
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| 48 | if (sizeof (unsigned long int) > 6) \ |
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| 49 | numstr = _itoa_word (num0, numstr, 16, info->spec == 'A'); \ |
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| 50 | else \ |
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| 51 | numstr = _itoa (num0, numstr, 16, info->spec == 'A'); \ |
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| 52 | \ |
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| 53 | /* Fill with zeroes. */ \ |
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| 54 | while (numstr > numbuf + (sizeof numbuf - 112 / 4)) \ |
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| 55 | *--numstr = '0'; \ |
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| 56 | \ |
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| 57 | leading = u.ieee.exponent == 0 ? '0' : '1'; \ |
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| 58 | \ |
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| 59 | exponent = u.ieee.exponent; \ |
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| 60 | \ |
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| 61 | if (exponent == 0) \ |
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| 62 | { \ |
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| 63 | if (zero_mantissa) \ |
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| 64 | expnegative = 0; \ |
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| 65 | else \ |
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| 66 | { \ |
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| 67 | /* This is a denormalized number. */ \ |
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| 68 | expnegative = 1; \ |
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| 69 | exponent = IEEE854_BIAS - 1; \ |
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| 70 | } \ |
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| 71 | } \ |
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| 72 | else if (exponent >= IEEE854_BIAS) \ |
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| 73 | { \ |
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| 74 | expnegative = 0; \ |
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| 75 | exponent -= IEEE854_BIAS; \ |
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| 76 | } \ |
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| 77 | else \ |
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| 78 | { \ |
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| 79 | expnegative = 1; \ |
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| 80 | exponent = -(exponent - IEEE854_BIAS); \ |
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| 81 | } \ |
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| 82 | } while (0) |
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| 83 | |
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