| 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 |