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f5bc1778 | 1 | /* Decimal 128-bit format module header for the decNumber C Library. |
168a2f77 | 2 | Copyright (C) 2005, 2007, 2009 Free Software Foundation, Inc. |
f5bc1778 DJ |
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 | |
168a2f77 | 9 | Software Foundation; either version 3, or (at your option) any later |
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10 | version. |
11 | ||
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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 | ||
168a2f77 DD |
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/>. */ | |
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25 | |
26 | /* ------------------------------------------------------------------ */ | |
87d32bb7 | 27 | /* Decimal 128-bit format module header */ |
f5bc1778 DJ |
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 */ | |
87d32bb7 | 44 | /* highest biased exponent (Elimit-1) */ |
f5bc1778 DJ |
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) | |
87d32bb7 | 69 | #define DECIMAL_NaN 0x7c /* 0 11111 00 NaN */ |
f5bc1778 | 70 | #define DECIMAL_sNaN 0x7e /* 0 11111 10 sNaN */ |
87d32bb7 | 71 | #define DECIMAL_Inf 0x78 /* 0 11110 00 Infinity */ |
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72 | #endif |
73 | ||
87d32bb7 | 74 | #include "decimal128Local.h" |
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75 | |
76 | /* ---------------------------------------------------------------- */ | |
77 | /* Routines */ | |
78 | /* ---------------------------------------------------------------- */ | |
79 | ||
87d32bb7 | 80 | #include "decimal128Symbols.h" |
f5bc1778 | 81 | |
52d6785f DD |
82 | #ifdef __cplusplus |
83 | extern "C" { | |
84 | #endif | |
85 | ||
87d32bb7 | 86 | /* String conversions */ |
f5bc1778 DJ |
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 | ||
87d32bb7 | 96 | /* Format-dependent utilities */ |
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97 | uint32_t decimal128IsCanonical(const decimal128 *); |
98 | decimal128 * decimal128Canonical(decimal128 *, const decimal128 *); | |
99 | ||
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100 | #ifdef __cplusplus |
101 | } | |
102 | #endif | |
103 | ||
f5bc1778 | 104 | #endif |