| 1 | /* Decimal 128-bit format module header for the decNumber C Library. |
| 2 | Copyright (C) 2005-2013 Free Software Foundation, Inc. |
| 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 | /* ------------------------------------------------------------------ */ |
| 27 | /* Decimal 128-bit format module header */ |
| 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 */ |
| 44 | /* highest biased exponent (Elimit-1) */ |
| 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) |
| 69 | #define DECIMAL_NaN 0x7c /* 0 11111 00 NaN */ |
| 70 | #define DECIMAL_sNaN 0x7e /* 0 11111 10 sNaN */ |
| 71 | #define DECIMAL_Inf 0x78 /* 0 11110 00 Infinity */ |
| 72 | #endif |
| 73 | |
| 74 | #include "decimal128Local.h" |
| 75 | |
| 76 | /* ---------------------------------------------------------------- */ |
| 77 | /* Routines */ |
| 78 | /* ---------------------------------------------------------------- */ |
| 79 | |
| 80 | #include "decimal128Symbols.h" |
| 81 | |
| 82 | #ifdef __cplusplus |
| 83 | extern "C" { |
| 84 | #endif |
| 85 | |
| 86 | /* String conversions */ |
| 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 | |
| 96 | /* Format-dependent utilities */ |
| 97 | uint32_t decimal128IsCanonical(const decimal128 *); |
| 98 | decimal128 * decimal128Canonical(decimal128 *, const decimal128 *); |
| 99 | |
| 100 | #ifdef __cplusplus |
| 101 | } |
| 102 | #endif |
| 103 | |
| 104 | #endif |