Subversion Repositories openrisc_2011-10-31

/* decSingle module header for the decNumber C Library.

   Copyright (C) 2005, 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/>.  */

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

/* decSingle.h -- Decimal 32-bit format module header                 */

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

#if !defined(DECSINGLE)

  #define DECSINGLE

  #define DECSINGLENAME       "decSingle"             /* Short name   */

  #define DECSINGLETITLE      "Decimal 32-bit datum"  /* Verbose name */

  #define DECSINGLEAUTHOR     "Mike Cowlishaw"        /* Who to blame */

  /* parameters for decSingles */

  #define DECSINGLE_Bytes    4     /* length                          */

  #define DECSINGLE_Pmax     7     /* maximum precision (digits)      */

  #define DECSINGLE_Emin   -95     /* minimum adjusted exponent       */

  #define DECSINGLE_Emax    96     /* maximum adjusted exponent       */

  #define DECSINGLE_EmaxD    3     /* maximum exponent digits         */

  #define DECSINGLE_Bias   101     /* bias for the exponent           */

  #define DECSINGLE_String  16     /* maximum string length, +1       */

  #define DECSINGLE_EconL    6     /* exponent continuation length    */

  #define DECSINGLE_Declets  2     /* count of declets                */

  /* highest biased exponent (Elimit-1) */

  #define DECSINGLE_Ehigh (DECSINGLE_Emax + DECSINGLE_Bias - (DECSINGLE_Pmax-1))

  /* Required includes                                                */

  #include "decContext.h"

  #include "decQuad.h"

  #include "decDouble.h"

  /* The decSingle decimal 32-bit type, accessible by all sizes */

  typedef union {

    uint8_t   bytes[DECSINGLE_Bytes];   /* fields: 1, 5, 6, 20 bits */

    uint16_t shorts[DECSINGLE_Bytes/2];

    uint32_t  words[DECSINGLE_Bytes/4];

    } decSingle;

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

  /* Routines -- implemented as decFloat routines in common files     */

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

  #include "decSingleSymbols.h"

  /* Utilities (binary argument(s) or result, extractors, etc.) */

  extern decSingle * decSingleFromBCD(decSingle *, int32_t, const uint8_t *, int32_t);

  extern decSingle * decSingleFromPacked(decSingle *, int32_t, const uint8_t *);

  extern decSingle * decSingleFromPackedChecked(decSingle *, int32_t, const uint8_t *);

  extern decSingle * decSingleFromString(decSingle *, const char *, decContext *);

  extern decSingle * decSingleFromWider(decSingle *, const decDouble *, decContext *);

  extern int32_t     decSingleGetCoefficient(const decSingle *, uint8_t *);

  extern int32_t     decSingleGetExponent(const decSingle *);

  extern decSingle * decSingleSetCoefficient(decSingle *, const uint8_t *, int32_t);

  extern decSingle * decSingleSetExponent(decSingle *, decContext *, int32_t);

  extern void        decSingleShow(const decSingle *, const char *);

  extern int32_t     decSingleToBCD(const decSingle *, int32_t *, uint8_t *);

  extern char      * decSingleToEngString(const decSingle *, char *);

  extern int32_t     decSingleToPacked(const decSingle *, int32_t *, uint8_t *);

  extern char      * decSingleToString(const decSingle *, char *);

  extern decDouble * decSingleToWider(const decSingle *, decDouble *);

  extern decSingle * decSingleZero(decSingle *);

  /* (No Arithmetic routines for decSingle) */

  /* Non-computational */

  extern uint32_t     decSingleRadix(const decSingle *);

  extern const char * decSingleVersion(void);

  /* decNumber conversions; these are implemented as macros so as not  */

  /* to force a dependency on decimal32 and decNumber in decSingle.    */

  /* decSingleFromNumber returns a decimal32 * to avoid warnings.      */

  #define decSingleToNumber(dq, dn) decimal32ToNumber((decimal32 *)(dq), dn)

  #define decSingleFromNumber(dq, dn, set) decimal32FromNumber((decimal32 *)(dq), dn, set)

#endif