Subversion Repositories openrisc_2011-10-31

/* Decimal 128-bit format module header for the decNumber C Library.

   Copyright (C) 2005, 2007, 2009 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 3, or (at your option) any later

   version.

   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.

Under Section 7 of GPL version 3, you are granted additional

permissions described in the GCC Runtime Library Exception, version

3.1, as published by the Free Software Foundation.

You should have received a copy of the GNU General Public License and

a copy of the GCC Runtime Library Exception along with this program;

see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see

<http://www.gnu.org/licenses/>.  */

/* ------------------------------------------------------------------ */

/* Decimal 128-bit format module header                               */

/* ------------------------------------------------------------------ */

#if !defined(DECIMAL128)

  #define DECIMAL128

  #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

  #ifndef DECNUMBER

    #include "decNumber.h"              /* context and number library */

  #endif

  /* 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                                                         */

  /* ---------------------------------------------------------------- */

#include "decimal128Symbols.h"

  #ifdef __cplusplus

  extern "C" {

  #endif

  /* 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 *);

  #ifdef __cplusplus

  }

  #endif

#endif