Mercurial > hg > CbC > CbC_gcc
annotate libdecnumber/dpd/decimal128.h @ 158:494b0b89df80 default tip
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| author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
|---|---|
| date | Mon, 25 May 2020 18:13:55 +0900 |
| parents | 1830386684a0 |
| children |
| rev | line source |
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| 0 | 1 /* Decimal 128-bit format module header for the decNumber C Library. |
| 145 | 2 Copyright (C) 2005-2020 Free Software Foundation, Inc. |
| 0 | 3 Contributed by IBM Corporation. Author Mike Cowlishaw. |
| 4 | |
| 5 This file is part of GCC. | |
| 6 | |
| 7 GCC is free software; you can redistribute it and/or modify it under | |
| 8 the terms of the GNU General Public License as published by the Free | |
| 9 Software Foundation; either version 3, or (at your option) any later | |
| 10 version. | |
| 11 | |
| 12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
| 13 WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 15 for more details. | |
| 16 | |
| 17 Under Section 7 of GPL version 3, you are granted additional | |
| 18 permissions described in the GCC Runtime Library Exception, version | |
| 19 3.1, as published by the Free Software Foundation. | |
| 20 | |
| 21 You should have received a copy of the GNU General Public License and | |
| 22 a copy of the GCC Runtime Library Exception along with this program; | |
| 23 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
| 24 <http://www.gnu.org/licenses/>. */ | |
| 25 | |
| 26 /* ------------------------------------------------------------------ */ | |
|
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27 /* Decimal 128-bit format module header */ |
| 0 | 28 /* ------------------------------------------------------------------ */ |
| 29 | |
| 30 #if !defined(DECIMAL128) | |
| 31 #define DECIMAL128 | |
| 32 #define DEC128NAME "decimal128" /* Short name */ | |
| 33 #define DEC128FULLNAME "Decimal 128-bit Number" /* Verbose name */ | |
| 34 #define DEC128AUTHOR "Mike Cowlishaw" /* Who to blame */ | |
| 35 | |
| 36 /* parameters for decimal128s */ | |
| 37 #define DECIMAL128_Bytes 16 /* length */ | |
| 38 #define DECIMAL128_Pmax 34 /* maximum precision (digits) */ | |
| 39 #define DECIMAL128_Emax 6144 /* maximum adjusted exponent */ | |
| 40 #define DECIMAL128_Emin -6143 /* minimum adjusted exponent */ | |
| 41 #define DECIMAL128_Bias 6176 /* bias for the exponent */ | |
| 42 #define DECIMAL128_String 43 /* maximum string length, +1 */ | |
| 43 #define DECIMAL128_EconL 12 /* exp. continuation length */ | |
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44 /* highest biased exponent (Elimit-1) */ |
| 0 | 45 #define DECIMAL128_Ehigh (DECIMAL128_Emax+DECIMAL128_Bias-DECIMAL128_Pmax+1) |
| 46 | |
| 47 /* check enough digits, if pre-defined */ | |
| 48 #if defined(DECNUMDIGITS) | |
| 49 #if (DECNUMDIGITS<DECIMAL128_Pmax) | |
| 50 #error decimal128.h needs pre-defined DECNUMDIGITS>=34 for safe use | |
| 51 #endif | |
| 52 #endif | |
| 53 | |
| 54 #ifndef DECNUMDIGITS | |
| 55 #define DECNUMDIGITS DECIMAL128_Pmax /* size if not already defined*/ | |
| 56 #endif | |
| 57 #ifndef DECNUMBER | |
| 58 #include "decNumber.h" /* context and number library */ | |
| 59 #endif | |
| 60 | |
| 61 /* Decimal 128-bit type, accessible by bytes */ | |
| 62 typedef struct { | |
| 63 uint8_t bytes[DECIMAL128_Bytes]; /* decimal128: 1, 5, 12, 110 bits*/ | |
| 64 } decimal128; | |
| 65 | |
| 66 /* special values [top byte excluding sign bit; last two bits are */ | |
| 67 /* don't-care for Infinity on input, last bit don't-care for NaN] */ | |
| 68 #if !defined(DECIMAL_NaN) | |
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69 #define DECIMAL_NaN 0x7c /* 0 11111 00 NaN */ |
| 0 | 70 #define DECIMAL_sNaN 0x7e /* 0 11111 10 sNaN */ |
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71 #define DECIMAL_Inf 0x78 /* 0 11110 00 Infinity */ |
| 0 | 72 #endif |
| 73 | |
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74 #include "decimal128Local.h" |
| 0 | 75 |
| 76 /* ---------------------------------------------------------------- */ | |
| 77 /* Routines */ | |
| 78 /* ---------------------------------------------------------------- */ | |
| 79 | |
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80 #include "decimal128Symbols.h" |
| 0 | 81 |
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82 #ifdef __cplusplus |
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83 extern "C" { |
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84 #endif |
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85 |
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86 /* String conversions */ |
| 0 | 87 decimal128 * decimal128FromString(decimal128 *, const char *, decContext *); |
| 88 char * decimal128ToString(const decimal128 *, char *); | |
| 89 char * decimal128ToEngString(const decimal128 *, char *); | |
| 90 | |
| 91 /* decNumber conversions */ | |
| 92 decimal128 * decimal128FromNumber(decimal128 *, const decNumber *, | |
| 93 decContext *); | |
| 94 decNumber * decimal128ToNumber(const decimal128 *, decNumber *); | |
| 95 | |
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96 /* Format-dependent utilities */ |
| 0 | 97 uint32_t decimal128IsCanonical(const decimal128 *); |
| 98 decimal128 * decimal128Canonical(decimal128 *, const decimal128 *); | |
| 99 | |
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100 #ifdef __cplusplus |
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101 } |
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102 #endif |
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103 |
| 0 | 104 #endif |