| /* Decimal 128-bit format module header for the decNumber C Library. |
| Copyright (C) 2005, 2007 Free Software Foundation, Inc. |
| Contributed by IBM Corporation. Author Mike Cowlishaw. |
| |
| This file is part of GCC. |
| |
| GCC is free software; you can redistribute it and/or modify it under |
| the terms of the GNU General Public License as published by the Free |
| Software Foundation; either version 2, or (at your option) any later |
| version. |
| |
| In addition to the permissions in the GNU General Public License, |
| the Free Software Foundation gives you unlimited permission to link |
| the compiled version of this file into combinations with other |
| programs, and to distribute those combinations without any |
| restriction coming from the use of this file. (The General Public |
| License restrictions do apply in other respects; for example, they |
| cover modification of the file, and distribution when not linked |
| into a combine executable.) |
| |
| GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
| WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GCC; see the file COPYING. If not, write to the Free |
| Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301, USA. */ |
| |
| /* ------------------------------------------------------------------ */ |
| /* Decimal 128-bit format module header */ |
| /* ------------------------------------------------------------------ */ |
| |
| #ifndef DECIMAL128_H |
| #define DECIMAL128_H |
| |
| #define DEC128NAME "decimal128" /* Short name */ |
| #define DEC128FULLNAME "Decimal 128-bit Number" /* Verbose name */ |
| #define DEC128AUTHOR "Mike Cowlishaw" /* Who to blame */ |
| |
| /* parameters for decimal128s */ |
| #define DECIMAL128_Bytes 16 /* length */ |
| #define DECIMAL128_Pmax 34 /* maximum precision (digits) */ |
| #define DECIMAL128_Emax 6144 /* maximum adjusted exponent */ |
| #define DECIMAL128_Emin -6143 /* minimum adjusted exponent */ |
| #define DECIMAL128_Bias 6176 /* bias for the exponent */ |
| #define DECIMAL128_String 43 /* maximum string length, +1 */ |
| #define DECIMAL128_EconL 12 /* exp. continuation length */ |
| /* highest biased exponent (Elimit-1) */ |
| #define DECIMAL128_Ehigh (DECIMAL128_Emax+DECIMAL128_Bias-DECIMAL128_Pmax+1) |
| |
| /* check enough digits, if pre-defined */ |
| #if defined(DECNUMDIGITS) |
| #if (DECNUMDIGITS<DECIMAL128_Pmax) |
| #error decimal128.h needs pre-defined DECNUMDIGITS>=34 for safe use |
| #endif |
| #endif |
| |
| #ifndef DECNUMDIGITS |
| #define DECNUMDIGITS DECIMAL128_Pmax /* size if not already defined*/ |
| #endif |
| #include "libdecnumber/decNumber.h" |
| |
| /* Decimal 128-bit type, accessible by bytes */ |
| typedef struct { |
| uint8_t bytes[DECIMAL128_Bytes]; /* decimal128: 1, 5, 12, 110 bits*/ |
| } decimal128; |
| |
| /* special values [top byte excluding sign bit; last two bits are */ |
| /* don't-care for Infinity on input, last bit don't-care for NaN] */ |
| #if !defined(DECIMAL_NaN) |
| #define DECIMAL_NaN 0x7c /* 0 11111 00 NaN */ |
| #define DECIMAL_sNaN 0x7e /* 0 11111 10 sNaN */ |
| #define DECIMAL_Inf 0x78 /* 0 11110 00 Infinity */ |
| #endif |
| |
| #include "decimal128Local.h" |
| |
| /* ---------------------------------------------------------------- */ |
| /* Routines */ |
| /* ---------------------------------------------------------------- */ |
| |
| |
| /* String conversions */ |
| decimal128 * decimal128FromString(decimal128 *, const char *, decContext *); |
| char * decimal128ToString(const decimal128 *, char *); |
| char * decimal128ToEngString(const decimal128 *, char *); |
| |
| /* decNumber conversions */ |
| decimal128 * decimal128FromNumber(decimal128 *, const decNumber *, |
| decContext *); |
| decNumber * decimal128ToNumber(const decimal128 *, decNumber *); |
| |
| /* Format-dependent utilities */ |
| uint32_t decimal128IsCanonical(const decimal128 *); |
| decimal128 * decimal128Canonical(decimal128 *, const decimal128 *); |
| |
| #endif |