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Diffstat (limited to 'include/libdecnumber/dpd/decimal32.h')
| -rw-r--r-- | include/libdecnumber/dpd/decimal32.h | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/include/libdecnumber/dpd/decimal32.h b/include/libdecnumber/dpd/decimal32.h new file mode 100644 index 000000000..6cb9e4362 --- /dev/null +++ b/include/libdecnumber/dpd/decimal32.h @@ -0,0 +1,97 @@ +/* Decimal 32-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 32-bit format module header */ +/* ------------------------------------------------------------------ */ + +#ifndef DECIMAL32_H +#define DECIMAL32_H + + #define DEC32NAME "decimal32" /* Short name */ + #define DEC32FULLNAME "Decimal 32-bit Number" /* Verbose name */ + #define DEC32AUTHOR "Mike Cowlishaw" /* Who to blame */ + + /* parameters for decimal32s */ + #define DECIMAL32_Bytes 4 /* length */ + #define DECIMAL32_Pmax 7 /* maximum precision (digits) */ + #define DECIMAL32_Emax 96 /* maximum adjusted exponent */ + #define DECIMAL32_Emin -95 /* minimum adjusted exponent */ + #define DECIMAL32_Bias 101 /* bias for the exponent */ + #define DECIMAL32_String 15 /* maximum string length, +1 */ + #define DECIMAL32_EconL 6 /* exp. continuation length */ + /* highest biased exponent (Elimit-1) */ + #define DECIMAL32_Ehigh (DECIMAL32_Emax+DECIMAL32_Bias-DECIMAL32_Pmax+1) + + /* check enough digits, if pre-defined */ + #if defined(DECNUMDIGITS) + #if (DECNUMDIGITS<DECIMAL32_Pmax) + #error decimal32.h needs pre-defined DECNUMDIGITS>=7 for safe use + #endif + #endif + + #ifndef DECNUMDIGITS + #define DECNUMDIGITS DECIMAL32_Pmax /* size if not already defined*/ + #endif + #include "libdecnumber/decNumber.h" + + /* Decimal 32-bit type, accessible by bytes */ + typedef struct { + uint8_t bytes[DECIMAL32_Bytes]; /* decimal32: 1, 5, 6, 20 bits*/ + } decimal32; + + /* 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 + + /* ---------------------------------------------------------------- */ + /* Routines */ + /* ---------------------------------------------------------------- */ + + + /* String conversions */ + decimal32 * decimal32FromString(decimal32 *, const char *, decContext *); + char * decimal32ToString(const decimal32 *, char *); + char * decimal32ToEngString(const decimal32 *, char *); + + /* decNumber conversions */ + decimal32 * decimal32FromNumber(decimal32 *, const decNumber *, + decContext *); + decNumber * decimal32ToNumber(const decimal32 *, decNumber *); + + /* Format-dependent utilities */ + uint32_t decimal32IsCanonical(const decimal32 *); + decimal32 * decimal32Canonical(decimal32 *, const decimal32 *); + +#endif |