1/* decSingle module header for the decNumber C Library. 2 Copyright (C) 2005-2015 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 17Under Section 7 of GPL version 3, you are granted additional 18permissions described in the GCC Runtime Library Exception, version 193.1, as published by the Free Software Foundation. 20 21You should have received a copy of the GNU General Public License and 22a copy of the GCC Runtime Library Exception along with this program; 23see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 24<http://www.gnu.org/licenses/>. */ 25 26/* ------------------------------------------------------------------ */ 27/* decSingle.h -- Decimal 32-bit format module header */ 28/* ------------------------------------------------------------------ */ 29 30#if !defined(DECSINGLE) 31 #define DECSINGLE 32 33 #define DECSINGLENAME "decSingle" /* Short name */ 34 #define DECSINGLETITLE "Decimal 32-bit datum" /* Verbose name */ 35 #define DECSINGLEAUTHOR "Mike Cowlishaw" /* Who to blame */ 36 37 /* parameters for decSingles */ 38 #define DECSINGLE_Bytes 4 /* length */ 39 #define DECSINGLE_Pmax 7 /* maximum precision (digits) */ 40 #define DECSINGLE_Emin -95 /* minimum adjusted exponent */ 41 #define DECSINGLE_Emax 96 /* maximum adjusted exponent */ 42 #define DECSINGLE_EmaxD 3 /* maximum exponent digits */ 43 #define DECSINGLE_Bias 101 /* bias for the exponent */ 44 #define DECSINGLE_String 16 /* maximum string length, +1 */ 45 #define DECSINGLE_EconL 6 /* exponent continuation length */ 46 #define DECSINGLE_Declets 2 /* count of declets */ 47 /* highest biased exponent (Elimit-1) */ 48 #define DECSINGLE_Ehigh (DECSINGLE_Emax + DECSINGLE_Bias - (DECSINGLE_Pmax-1)) 49 50 /* Required includes */ 51 #include "decContext.h" 52 #include "decQuad.h" 53 #include "decDouble.h" 54 55 /* The decSingle decimal 32-bit type, accessible by all sizes */ 56 typedef union { 57 uint8_t bytes[DECSINGLE_Bytes]; /* fields: 1, 5, 6, 20 bits */ 58 uint16_t shorts[DECSINGLE_Bytes/2]; 59 uint32_t words[DECSINGLE_Bytes/4]; 60 } decSingle; 61 62 /* ---------------------------------------------------------------- */ 63 /* Routines -- implemented as decFloat routines in common files */ 64 /* ---------------------------------------------------------------- */ 65 66 #include "decSingleSymbols.h" 67 68 /* Utilities (binary argument(s) or result, extractors, etc.) */ 69 extern decSingle * decSingleFromBCD(decSingle *, int32_t, const uint8_t *, int32_t); 70 extern decSingle * decSingleFromPacked(decSingle *, int32_t, const uint8_t *); 71 extern decSingle * decSingleFromPackedChecked(decSingle *, int32_t, const uint8_t *); 72 extern decSingle * decSingleFromString(decSingle *, const char *, decContext *); 73 extern decSingle * decSingleFromWider(decSingle *, const decDouble *, decContext *); 74 extern int32_t decSingleGetCoefficient(const decSingle *, uint8_t *); 75 extern int32_t decSingleGetExponent(const decSingle *); 76 extern decSingle * decSingleSetCoefficient(decSingle *, const uint8_t *, int32_t); 77 extern decSingle * decSingleSetExponent(decSingle *, decContext *, int32_t); 78 extern void decSingleShow(const decSingle *, const char *); 79 extern int32_t decSingleToBCD(const decSingle *, int32_t *, uint8_t *); 80 extern char * decSingleToEngString(const decSingle *, char *); 81 extern int32_t decSingleToPacked(const decSingle *, int32_t *, uint8_t *); 82 extern char * decSingleToString(const decSingle *, char *); 83 extern decDouble * decSingleToWider(const decSingle *, decDouble *); 84 extern decSingle * decSingleZero(decSingle *); 85 86 /* (No Arithmetic routines for decSingle) */ 87 88 /* Non-computational */ 89 extern uint32_t decSingleRadix(const decSingle *); 90 extern const char * decSingleVersion(void); 91 92 /* decNumber conversions; these are implemented as macros so as not */ 93 /* to force a dependency on decimal32 and decNumber in decSingle. */ 94 /* decSingleFromNumber returns a decimal32 * to avoid warnings. */ 95 #define decSingleToNumber(dq, dn) decimal32ToNumber((decimal32 *)(dq), dn) 96 #define decSingleFromNumber(dq, dn, set) decimal32FromNumber((decimal32 *)(dq), dn, set) 97 98#endif 99