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1 | /* decSingle module header for the decNumber C Library. |
2 | Copyright (C) 2005 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 2, or (at your option) any later | |
10 | version. | |
11 | ||
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 | ||
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 | |
28 | Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA | |
29 | 02110-1301, USA. */ | |
30 | ||
31 | /* ------------------------------------------------------------------ */ | |
32 | /* decSingle.h -- Decimal 32-bit format module header */ | |
33 | /* ------------------------------------------------------------------ */ | |
34 | /* Please see decFloats.h for an overview and documentation details. */ | |
35 | /* ------------------------------------------------------------------ */ | |
36 | ||
37 | #if !defined(DECSINGLE) | |
38 | #define DECSINGLE | |
39 | ||
40 | #define DECSINGLENAME "decSingle" /* Short name */ | |
41 | #define DECSINGLETITLE "Decimal 32-bit datum" /* Verbose name */ | |
42 | #define DECSINGLEAUTHOR "Mike Cowlishaw" /* Who to blame */ | |
43 | ||
44 | /* parameters for decSingles */ | |
45 | #define DECSINGLE_Bytes 4 /* length */ | |
46 | #define DECSINGLE_Pmax 7 /* maximum precision (digits) */ | |
47 | #define DECSINGLE_Emin -95 /* minimum adjusted exponent */ | |
48 | #define DECSINGLE_Emax 96 /* maximum adjusted exponent */ | |
49 | #define DECSINGLE_EmaxD 3 /* maximum exponent digits */ | |
50 | #define DECSINGLE_Bias 101 /* bias for the exponent */ | |
51 | #define DECSINGLE_String 16 /* maximum string length, +1 */ | |
52 | #define DECSINGLE_EconL 6 /* exponent continuation length */ | |
53 | #define DECSINGLE_Declets 2 /* count of declets */ | |
54 | /* highest biased exponent (Elimit-1) */ | |
55 | #define DECSINGLE_Ehigh (DECSINGLE_Emax + DECSINGLE_Bias - (DECSINGLE_Pmax-1)) | |
56 | ||
57 | /* Required includes */ | |
58 | #include "decContext.h" | |
59 | #include "decQuad.h" | |
60 | #include "decDouble.h" | |
61 | ||
62 | /* The decSingle decimal 32-bit type, accessible by bytes */ | |
63 | typedef struct { | |
64 | uint8_t bytes[DECSINGLE_Bytes]; /* fields: 1, 5, 6, 20 bits */ | |
65 | } decSingle; | |
66 | ||
67 | /* ---------------------------------------------------------------- */ | |
68 | /* Routines -- implemented as decFloat routines in common files */ | |
69 | /* ---------------------------------------------------------------- */ | |
70 | ||
71 | #include "decSingleSymbols.h" | |
72 | ||
73 | /* Utilities (binary argument(s) or result, extractors, etc.) */ | |
74 | extern decSingle * decSingleFromBCD(decSingle *, int32_t, const uint8_t *, int32_t); | |
75 | extern decSingle * decSingleFromPacked(decSingle *, int32_t, const uint8_t *); | |
76 | extern decSingle * decSingleFromString(decSingle *, const char *, decContext *); | |
77 | extern decSingle * decSingleFromWider(decSingle *, const decDouble *, decContext *); | |
78 | extern int32_t decSingleGetCoefficient(const decSingle *, uint8_t *); | |
79 | extern int32_t decSingleGetExponent(const decSingle *); | |
80 | extern decSingle * decSingleSetCoefficient(decSingle *, const uint8_t *, int32_t); | |
81 | extern decSingle * decSingleSetExponent(decSingle *, decContext *, int32_t); | |
82 | extern void decSingleShow(const decSingle *, const char *); | |
83 | extern int32_t decSingleToBCD(const decSingle *, int32_t *, uint8_t *); | |
84 | extern char * decSingleToEngString(const decSingle *, char *); | |
85 | extern int32_t decSingleToPacked(const decSingle *, int32_t *, uint8_t *); | |
86 | extern char * decSingleToString(const decSingle *, char *); | |
87 | extern decDouble * decSingleToWider(const decSingle *, decDouble *); | |
88 | extern decSingle * decSingleZero(decSingle *); | |
89 | ||
90 | /* (No Arithmetic routines for decSingle) */ | |
91 | ||
92 | /* Non-computational */ | |
93 | extern uint32_t decSingleRadix(const decSingle *); | |
94 | extern const char * decSingleVersion(void); | |
95 | ||
96 | /* decNumber conversions; these are implemented as macros so as not */ | |
97 | /* to force a dependency on decimal32 and decNumber in decSingle. */ | |
98 | #define decSingleToNumber(dq, dn) decimal32ToNumber((decimal32 *)(dq), dn) | |
99 | #define decSingleFromNumber(dq, dn, set) (decSingle *)decimal32FromNumber((decimal32 *)(dq), dn, set) | |
100 | ||
101 | #endif |