projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| c9cf6dde | 1 | /* Print floating point number in hexadecimal notation according to ISO C99. |
| a334319f | 2 | Copyright (C) 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc. |
| c9cf6dde AJ |
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 | |
| 16 | License along with the GNU C Library; if not, write to the Free | |
| 17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
| 18 | 02111-1307 USA. */ | |
| 19 | ||
| 20 | #ifndef LONG_DOUBLE_DENORM_BIAS | |
| 21 | # define LONG_DOUBLE_DENORM_BIAS (IEEE854_LONG_DOUBLE_BIAS - 1) | |
| 22 | #endif | |
| 23 | ||
| 24 | #define PRINT_FPHEX_LONG_DOUBLE \ | |
| 25 | do { \ | |
| 26 | /* The "strange" 80 bit format on ix86 and m68k has an explicit \ | |
| 27 | leading digit in the 64 bit mantissa. */ \ | |
| 28 | unsigned long long int num; \ | |
| 29 | \ | |
| 30 | \ | |
| 31 | num = (((unsigned long long int) fpnum.ldbl.ieee.mantissa0) << 32 \ | |
| 32 | | fpnum.ldbl.ieee.mantissa1); \ | |
| 33 | \ | |
| 34 | zero_mantissa = num == 0; \ | |
| 35 | \ | |
| 36 | if (sizeof (unsigned long int) > 6) \ | |
| 37 | { \ | |
| 38 | numstr = _itoa_word (num, numbuf + sizeof numbuf, 16, \ | |
| 39 | info->spec == 'A'); \ | |
| 40 | wnumstr = _itowa_word (num, \ | |
| 41 | wnumbuf + sizeof (wnumbuf) / sizeof (wchar_t),\ | |
| 42 | 16, info->spec == 'A'); \ | |
| 43 | } \ | |
| 44 | else \ | |
| 45 | { \ | |
| 46 | numstr = _itoa (num, numbuf + sizeof numbuf, 16, info->spec == 'A');\ | |
| 47 | wnumstr = _itowa (num, \ | |
| 48 | wnumbuf + sizeof (wnumbuf) / sizeof (wchar_t), \ | |
| 49 | 16, info->spec == 'A'); \ | |
| 50 | } \ | |
| 51 | \ | |
| 52 | /* Fill with zeroes. */ \ | |
| 53 | while (numstr > numbuf + (sizeof numbuf - 64 / 4)) \ | |
| 54 | { \ | |
| 55 | *--numstr = '0'; \ | |
| 56 | *--wnumstr = L'0'; \ | |
| 57 | } \ | |
| 58 | \ | |
| 59 | /* We use a full nibble for the leading digit. */ \ | |
| 60 | leading = *numstr++; \ | |
| 61 | \ | |
| 62 | /* We have 3 bits from the mantissa in the leading nibble. \ | |
| 63 | Therefore we are here using `IEEE854_LONG_DOUBLE_BIAS + 3'. */ \ | |
| 64 | exponent = fpnum.ldbl.ieee.exponent; \ | |
| 65 | \ | |
| 66 | if (exponent == 0) \ | |
| 67 | { \ | |
| 68 | if (zero_mantissa) \ | |
| 69 | expnegative = 0; \ | |
| 70 | else \ | |
| 71 | { \ | |
| 72 | /* This is a denormalized number. */ \ | |
| 73 | expnegative = 1; \ | |
| 74 | /* This is a hook for the m68k long double format, where the \ | |
| 75 | exponent bias is the same for normalized and denormalized \ | |
| 76 | numbers. */ \ | |
| 77 | exponent = LONG_DOUBLE_DENORM_BIAS + 3; \ | |
| 78 | } \ | |
| 79 | } \ | |
| 80 | else if (exponent >= IEEE854_LONG_DOUBLE_BIAS + 3) \ | |
| 81 | { \ | |
| 82 | expnegative = 0; \ | |
| 83 | exponent -= IEEE854_LONG_DOUBLE_BIAS + 3; \ | |
| 84 | } \ | |
| 85 | else \ | |
| 86 | { \ | |
| 87 | expnegative = 1; \ | |
| 88 | exponent = -(exponent - (IEEE854_LONG_DOUBLE_BIAS + 3)); \ | |
| 89 | } \ | |
| 90 | } while (0) | |
| 91 | ||
| a334319f | 92 | #include <sysdeps/generic/printf_fphex.c> |