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Diffstat (limited to 'gcc-4.2.1-5666.3/libdecnumber/decimal64.h')
| -rw-r--r-- | gcc-4.2.1-5666.3/libdecnumber/decimal64.h | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/gcc-4.2.1-5666.3/libdecnumber/decimal64.h b/gcc-4.2.1-5666.3/libdecnumber/decimal64.h new file mode 100644 index 000000000..2c7131c53 --- /dev/null +++ b/gcc-4.2.1-5666.3/libdecnumber/decimal64.h @@ -0,0 +1,116 @@ +/* Decimal 64-bit format module header for the decNumber C Library + Copyright (C) 2005 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. */ + +#if !defined(DECIMAL64) +#define DECIMAL64 +#define DEC64NAME "decimal64" /* Short name */ +#define DEC64FULLNAME "Decimal 64-bit Number" /* Verbose name */ +#define DEC64AUTHOR "Mike Cowlishaw" /* Who to blame */ + +#if defined(DECIMAL32) +#error decimal64.h must precede decimal32.h for correct DECNUMDIGITS +#endif + + /* parameters for decimal64s */ +#define DECIMAL64_Bytes 8 /* length */ +#define DECIMAL64_Pmax 16 /* maximum precision (digits) */ +#define DECIMAL64_Emax 384 /* maximum adjusted exponent */ +#define DECIMAL64_Emin -383 /* minimum adjusted exponent */ +#define DECIMAL64_Bias 398 /* bias for the exponent */ +#define DECIMAL64_String 24 /* maximum string length, +1 */ + /* highest biased exponent (Elimit-1) */ +#define DECIMAL64_Ehigh (DECIMAL64_Emax+DECIMAL64_Bias-DECIMAL64_Pmax+1) + +#ifndef DECNUMDIGITS +#define DECNUMDIGITS DECIMAL64_Pmax /* size if not already defined */ +#endif +#ifndef DECNUMBER +#include "decNumber.h" /* context and number library */ +#endif + + /* Decimal 64-bit type, accessible by bytes */ +typedef struct +{ + uint8_t bytes[DECIMAL64_Bytes]; /* decimal64: 1, 5, 8, 50 bits */ +} decimal64; + + /* 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 + + /* Macros for accessing decimal64 fields. These assume the argument + is a reference (pointer) to the decimal64 structure */ + /* Get sign */ +#define decimal64Sign(d) ((unsigned)(d)->bytes[0]>>7) + + /* Get combination field */ +#define decimal64Comb(d) (((d)->bytes[0] & 0x7c)>>2) + + /* Get exponent continuation [does not remove bias] */ +#define decimal64ExpCon(d) ((((d)->bytes[0] & 0x03)<<6) \ + | ((unsigned)(d)->bytes[1]>>2)) + + /* Set sign [this assumes sign previously 0] */ +#define decimal64SetSign(d, b) { \ + (d)->bytes[0]|=((unsigned)(b)<<7);} + + /* Set exponent continuation [does not apply bias] */ + /* This assumes range has been checked and exponent previously 0; type */ + /* of exponent must be unsigned */ +#define decimal64SetExpCon(d, e) { \ + (d)->bytes[0]|=(uint8_t)((e)>>6); \ + (d)->bytes[1]|=(uint8_t)(((e)&0x3F)<<2);} + + /* ------------------------------------------------------------------ */ + /* Routines */ + /* ------------------------------------------------------------------ */ + +#ifdef IN_LIBGCC2 +#define decimal64FromString __decimal64FromString +#define decimal64ToString __decimal64ToString +#define decimal64ToEngString __decimal64ToEngString +#define decimal64FromNumber __decimal64FromNumber +#define decimal64ToNumber __decimal64ToNumber +#endif + + /* String conversions */ +decimal64 *decimal64FromString (decimal64 *, const char *, decContext *); +char *decimal64ToString (const decimal64 *, char *); +char *decimal64ToEngString (const decimal64 *, char *); + + /* decNumber conversions */ +decimal64 *decimal64FromNumber (decimal64 *, const decNumber *, decContext *); +decNumber *decimal64ToNumber (const decimal64 *, decNumber *); + +#endif |