1 1.1 mrg /* Decimal 64-bit format module header for the decNumber C Library. 2 1.1.1.12 mrg Copyright (C) 2005-2024 Free Software Foundation, Inc. 3 1.1 mrg Contributed by IBM Corporation. Author Mike Cowlishaw. 4 1.1 mrg 5 1.1 mrg This file is part of GCC. 6 1.1 mrg 7 1.1 mrg GCC is free software; you can redistribute it and/or modify it under 8 1.1 mrg the terms of the GNU General Public License as published by the Free 9 1.1 mrg Software Foundation; either version 3, or (at your option) any later 10 1.1 mrg version. 11 1.1 mrg 12 1.1 mrg GCC is distributed in the hope that it will be useful, but WITHOUT ANY 13 1.1 mrg WARRANTY; without even the implied warranty of MERCHANTABILITY or 14 1.1 mrg FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 15 1.1 mrg for more details. 16 1.1 mrg 17 1.1 mrg Under Section 7 of GPL version 3, you are granted additional 18 1.1 mrg permissions described in the GCC Runtime Library Exception, version 19 1.1 mrg 3.1, as published by the Free Software Foundation. 20 1.1 mrg 21 1.1 mrg You should have received a copy of the GNU General Public License and 22 1.1 mrg a copy of the GCC Runtime Library Exception along with this program; 23 1.1 mrg see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 24 1.1 mrg <http://www.gnu.org/licenses/>. */ 25 1.1 mrg 26 1.1 mrg /* ------------------------------------------------------------------ */ 27 1.1 mrg /* Decimal 64-bit format module header */ 28 1.1 mrg /* ------------------------------------------------------------------ */ 29 1.1 mrg 30 1.1 mrg #if !defined(DECIMAL64) 31 1.1 mrg #define DECIMAL64 32 1.1 mrg #define DEC64NAME "decimal64" /* Short name */ 33 1.1 mrg #define DEC64FULLNAME "Decimal 64-bit Number" /* Verbose name */ 34 1.1 mrg #define DEC64AUTHOR "Mike Cowlishaw" /* Who to blame */ 35 1.1 mrg 36 1.1 mrg 37 1.1 mrg /* parameters for decimal64s */ 38 1.1 mrg #define DECIMAL64_Bytes 8 /* length */ 39 1.1 mrg #define DECIMAL64_Pmax 16 /* maximum precision (digits) */ 40 1.1 mrg #define DECIMAL64_Emax 384 /* maximum adjusted exponent */ 41 1.1 mrg #define DECIMAL64_Emin -383 /* minimum adjusted exponent */ 42 1.1 mrg #define DECIMAL64_Bias 398 /* bias for the exponent */ 43 1.1 mrg #define DECIMAL64_String 24 /* maximum string length, +1 */ 44 1.1 mrg #define DECIMAL64_EconL 8 /* exp. continuation length */ 45 1.1 mrg /* highest biased exponent (Elimit-1) */ 46 1.1 mrg #define DECIMAL64_Ehigh (DECIMAL64_Emax+DECIMAL64_Bias-DECIMAL64_Pmax+1) 47 1.1 mrg 48 1.1 mrg /* check enough digits, if pre-defined */ 49 1.1 mrg #if defined(DECNUMDIGITS) 50 1.1 mrg #if (DECNUMDIGITS<DECIMAL64_Pmax) 51 1.1 mrg #error decimal64.h needs pre-defined DECNUMDIGITS>=16 for safe use 52 1.1 mrg #endif 53 1.1 mrg #endif 54 1.1 mrg 55 1.1 mrg 56 1.1 mrg #ifndef DECNUMDIGITS 57 1.1 mrg #define DECNUMDIGITS DECIMAL64_Pmax /* size if not already defined*/ 58 1.1 mrg #endif 59 1.1 mrg #ifndef DECNUMBER 60 1.1 mrg #include "decNumber.h" /* context and number library */ 61 1.1 mrg #endif 62 1.1 mrg 63 1.1 mrg /* Decimal 64-bit type, accessible by bytes */ 64 1.1 mrg typedef struct { 65 1.1 mrg uint8_t bytes[DECIMAL64_Bytes]; /* decimal64: 1, 5, 8, 50 bits*/ 66 1.1 mrg } decimal64; 67 1.1 mrg 68 1.1 mrg /* special values [top byte excluding sign bit; last two bits are */ 69 1.1 mrg /* don't-care for Infinity on input, last bit don't-care for NaN] */ 70 1.1 mrg #if !defined(DECIMAL_NaN) 71 1.1 mrg #define DECIMAL_NaN 0x7c /* 0 11111 00 NaN */ 72 1.1 mrg #define DECIMAL_sNaN 0x7e /* 0 11111 10 sNaN */ 73 1.1 mrg #define DECIMAL_Inf 0x78 /* 0 11110 00 Infinity */ 74 1.1 mrg #endif 75 1.1 mrg 76 1.1 mrg /* ---------------------------------------------------------------- */ 77 1.1 mrg /* Routines */ 78 1.1 mrg /* ---------------------------------------------------------------- */ 79 1.1 mrg 80 1.1 mrg #include "decimal64Symbols.h" 81 1.1 mrg 82 1.1 mrg #ifdef __cplusplus 83 1.1 mrg extern "C" { 84 1.1 mrg #endif 85 1.1 mrg 86 1.1 mrg /* String conversions */ 87 1.1 mrg decimal64 * decimal64FromString(decimal64 *, const char *, decContext *); 88 1.1 mrg char * decimal64ToString(const decimal64 *, char *); 89 1.1 mrg char * decimal64ToEngString(const decimal64 *, char *); 90 1.1 mrg 91 1.1 mrg /* decNumber conversions */ 92 1.1 mrg decimal64 * decimal64FromNumber(decimal64 *, const decNumber *, 93 1.1 mrg decContext *); 94 1.1 mrg decNumber * decimal64ToNumber(const decimal64 *, decNumber *); 95 1.1 mrg 96 1.1 mrg /* Format-dependent utilities */ 97 1.1 mrg uint32_t decimal64IsCanonical(const decimal64 *); 98 1.1 mrg decimal64 * decimal64Canonical(decimal64 *, const decimal64 *); 99 1.1 mrg 100 1.1 mrg #ifdef __cplusplus 101 1.1 mrg } 102 1.1 mrg #endif 103 1.1 mrg 104 1.1 mrg #endif 105
Indexes created Sun Mar 01 05:31:48 UTC 2026