projects / thirdparty / gcc.git / blame
| Commit | Line | Data |
|---|---|---|
| 2533577f JJ |
1 | /* Decimal 128-bit format module header for the decNumber C Library. |
| 2 | Copyright (C) 2005, 2007 Free Software Foundation, Inc. | |
| 473a74b9 BE |
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 2, or (at your option) any later | |
| 10 | version. | |
| 11 | ||
| 9d1d1cd4 BE |
12 | In addition to the permissions in the GNU General Public License, |
| 13 | the Free Software Foundation gives you unlimited permission to link | |
| 14 | the compiled version of this file into combinations with other | |
| 15 | programs, and to distribute those combinations without any | |
| 16 | restriction coming from the use of this file. (The General Public | |
| 17 | License restrictions do apply in other respects; for example, they | |
| 18 | cover modification of the file, and distribution when not linked | |
| 19 | into a combine executable.) | |
| 20 | ||
| 473a74b9 BE |
21 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
| 22 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 23 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 24 | for more details. | |
| 25 | ||
| 26 | You should have received a copy of the GNU General Public License | |
| 27 | along with GCC; see the file COPYING. If not, write to the Free | |
| c0173136 BE |
28 | Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA |
| 29 | 02110-1301, USA. */ | |
| 473a74b9 | 30 | |
| 2533577f | 31 | /* ------------------------------------------------------------------ */ |
| 7bd36a9c | 32 | /* Decimal 128-bit format module header */ |
| 2533577f JJ |
33 | /* ------------------------------------------------------------------ */ |
| 34 | ||
| 473a74b9 | 35 | #if !defined(DECIMAL128) |
| 2533577f JJ |
36 | #define DECIMAL128 |
| 37 | #define DEC128NAME "decimal128" /* Short name */ | |
| 38 | #define DEC128FULLNAME "Decimal 128-bit Number" /* Verbose name */ | |
| 39 | #define DEC128AUTHOR "Mike Cowlishaw" /* Who to blame */ | |
| 473a74b9 BE |
40 | |
| 41 | /* parameters for decimal128s */ | |
| 2533577f JJ |
42 | #define DECIMAL128_Bytes 16 /* length */ |
| 43 | #define DECIMAL128_Pmax 34 /* maximum precision (digits) */ | |
| 44 | #define DECIMAL128_Emax 6144 /* maximum adjusted exponent */ | |
| 45 | #define DECIMAL128_Emin -6143 /* minimum adjusted exponent */ | |
| 46 | #define DECIMAL128_Bias 6176 /* bias for the exponent */ | |
| 47 | #define DECIMAL128_String 43 /* maximum string length, +1 */ | |
| 48 | #define DECIMAL128_EconL 12 /* exp. continuation length */ | |
| 7bd36a9c | 49 | /* highest biased exponent (Elimit-1) */ |
| 2533577f JJ |
50 | #define DECIMAL128_Ehigh (DECIMAL128_Emax+DECIMAL128_Bias-DECIMAL128_Pmax+1) |
| 51 | ||
| 52 | /* check enough digits, if pre-defined */ | |
| 53 | #if defined(DECNUMDIGITS) | |
| 54 | #if (DECNUMDIGITS<DECIMAL128_Pmax) | |
| 55 | #error decimal128.h needs pre-defined DECNUMDIGITS>=34 for safe use | |
| 56 | #endif | |
| 57 | #endif | |
| 58 | ||
| 59 | #ifndef DECNUMDIGITS | |
| 60 | #define DECNUMDIGITS DECIMAL128_Pmax /* size if not already defined*/ | |
| 61 | #endif | |
| 62 | #ifndef DECNUMBER | |
| 63 | #include "decNumber.h" /* context and number library */ | |
| 64 | #endif | |
| 65 | ||
| 66 | /* Decimal 128-bit type, accessible by bytes */ | |
| 67 | typedef struct { | |
| 68 | uint8_t bytes[DECIMAL128_Bytes]; /* decimal128: 1, 5, 12, 110 bits*/ | |
| 69 | } decimal128; | |
| 70 | ||
| 71 | /* special values [top byte excluding sign bit; last two bits are */ | |
| 72 | /* don't-care for Infinity on input, last bit don't-care for NaN] */ | |
| 73 | #if !defined(DECIMAL_NaN) | |
| 7bd36a9c | 74 | #define DECIMAL_NaN 0x7c /* 0 11111 00 NaN */ |
| 2533577f | 75 | #define DECIMAL_sNaN 0x7e /* 0 11111 10 sNaN */ |
| 7bd36a9c | 76 | #define DECIMAL_Inf 0x78 /* 0 11110 00 Infinity */ |
| 2533577f JJ |
77 | #endif |
| 78 | ||
| 7bd36a9c | 79 | #include "decimal128Local.h" |
| 2533577f JJ |
80 | |
| 81 | /* ---------------------------------------------------------------- */ | |
| 82 | /* Routines */ | |
| 83 | /* ---------------------------------------------------------------- */ | |
| 84 | ||
| 7bd36a9c | 85 | #include "decimal128Symbols.h" |
| 2533577f | 86 | |
| 7bd36a9c | 87 | /* String conversions */ |
| 2533577f JJ |
88 | decimal128 * decimal128FromString(decimal128 *, const char *, decContext *); |
| 89 | char * decimal128ToString(const decimal128 *, char *); | |
| 90 | char * decimal128ToEngString(const decimal128 *, char *); | |
| 91 | ||
| 92 | /* decNumber conversions */ | |
| 93 | decimal128 * decimal128FromNumber(decimal128 *, const decNumber *, | |
| 94 | decContext *); | |
| 95 | decNumber * decimal128ToNumber(const decimal128 *, decNumber *); | |
| 96 | ||
| 7bd36a9c | 97 | /* Format-dependent utilities */ |
| 2533577f JJ |
98 | uint32_t decimal128IsCanonical(const decimal128 *); |
| 99 | decimal128 * decimal128Canonical(decimal128 *, const decimal128 *); | |
| 473a74b9 BE |
100 | |
| 101 | #endif |