/* Header file for dfp-bit.c.
   Copyright (C) 2005, 2006 Free Software Foundation, Inc.

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.  */

#ifndef _DFPBIT_H
#define _DFPBIT_H

#include "tconfig.h"
#include "coretypes.h"
#include "tm.h"

#ifndef LIBGCC2_WORDS_BIG_ENDIAN
#define LIBGCC2_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
#endif

#ifndef LIBGCC2_FLOAT_WORDS_BIG_ENDIAN
#define LIBGCC2_FLOAT_WORDS_BIG_ENDIAN LIBGCC2_WORDS_BIG_ENDIAN
#endif

#ifndef LIBGCC2_LONG_DOUBLE_TYPE_SIZE
#define LIBGCC2_LONG_DOUBLE_TYPE_SIZE LONG_DOUBLE_TYPE_SIZE
#endif

#ifndef LIBGCC2_HAS_XF_MODE
#define LIBGCC2_HAS_XF_MODE \
  (BITS_PER_UNIT == 8 && LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 80)
#endif

/* Depending on WIDTH, define a number of macros:

   DFP_C_TYPE: type of the arguments to the libgcc functions;
        (eg _Decimal32)

   IEEE_TYPE: the corresponding (encoded) IEEE754R type;
        (eg decimal32)
   
   TO_INTERNAL: the name of the decNumber function to convert an
   encoded value into the decNumber internal representation;

   TO_ENCODED: the name of the decNumber function to convert an
   internally represented decNumber into the encoded
   representation.

   FROM_STRING: the name of the decNumber function to read an
   encoded value from a string.

   TO_STRING: the name of the decNumber function to write an
   encoded value to a string.  */

#if WIDTH == 32
#define DFP_C_TYPE        _Decimal32
#define IEEE_TYPE        decimal32
#define HOST_TO_IEEE        __host_to_ieee_32
#define IEEE_TO_HOST        __ieee_to_host_32
#define TO_INTERNAL        __decimal32ToNumber
#define TO_ENCODED        __decimal32FromNumber
#define FROM_STRING        __decimal32FromString
#define TO_STRING        __decimal32ToString
#elif WIDTH == 64
#define DFP_C_TYPE        _Decimal64
#define IEEE_TYPE        decimal64
#define HOST_TO_IEEE        __host_to_ieee_64
#define IEEE_TO_HOST        __ieee_to_host_64
#define TO_INTERNAL        __decimal64ToNumber
#define TO_ENCODED        __decimal64FromNumber
#define FROM_STRING        __decimal64FromString
#define TO_STRING        __decimal64ToString
#elif WIDTH == 128
#define DFP_C_TYPE        _Decimal128
#define IEEE_TYPE        decimal128
#define HOST_TO_IEEE        __host_to_ieee_128
#define IEEE_TO_HOST        __ieee_to_host_128
#define TO_INTERNAL        __decimal128ToNumber
#define TO_ENCODED        __decimal128FromNumber
#define FROM_STRING        __decimal128FromString
#define TO_STRING        __decimal128ToString
#else
#error invalid decimal float word width
#endif

/* We define __DEC_EVAL_METHOD__ to 2, saying that we evaluate all
   operations and constants to the range and precision of the _Decimal128
   type.  Make it so.  */
#if WIDTH == 32
#define CONTEXT_INIT DEC_INIT_DECIMAL32
#elif WIDTH == 64
#define CONTEXT_INIT DEC_INIT_DECIMAL64
#elif WIDTH == 128
#define CONTEXT_INIT DEC_INIT_DECIMAL128
#endif

/* Define CONTEXT_ROUND to obtain the current decNumber rounding mode.  */
extern enum rounding        __decGetRound (void);
#define CONTEXT_ROUND        __decGetRound ()

extern int __dfp_traps;
#define CONTEXT_TRAPS        __dfp_traps
#define CONTEXT_ERRORS(context)        context.status & DEC_Errors
extern void __dfp_raise (int);
#define DFP_RAISE(A)        __dfp_raise(A)

/* Conversions between different decimal float types use WIDTH_TO to
   determine additional macros to define.  */

#if defined (L_dd_to_sd) || defined (L_td_to_sd)
#define WIDTH_TO 32
#elif defined (L_sd_to_dd) || defined (L_td_to_dd)
#define WIDTH_TO 64
#elif defined (L_sd_to_td) || defined (L_dd_to_td)
#define WIDTH_TO 128
#endif

/* If WIDTH_TO is defined, define additional macros:

   DFP_C_TYPE_TO: type of the result of dfp to dfp conversion.

   IEEE_TYPE_TO: the corresponding (encoded) IEEE754R type.

   TO_ENCODED_TO: the name of the decNumber function to convert an
   internally represented decNumber into the encoded representation
   for the destination.  */

#if WIDTH_TO == 32
#define DFP_C_TYPE_TO        _Decimal32
#define IEEE_TYPE_TO        decimal32
#define TO_ENCODED_TO        __decimal32FromNumber
#define IEEE_TO_HOST_TO __ieee_to_host_32
#elif WIDTH_TO == 64
#define DFP_C_TYPE_TO        _Decimal64
#define IEEE_TYPE_TO        decimal64
#define TO_ENCODED_TO        __decimal64FromNumber
#define IEEE_TO_HOST_TO __ieee_to_host_64
#elif WIDTH_TO == 128
#define DFP_C_TYPE_TO        _Decimal128
#define IEEE_TYPE_TO        decimal128
#define TO_ENCODED_TO        __decimal128FromNumber
#define IEEE_TO_HOST_TO __ieee_to_host_128
#endif

/* Conversions between decimal float types and integral types use INT_KIND
   to determine the data type and C functions to use.  */

#if defined (L_sd_to_si) || defined (L_dd_to_si) || defined (L_td_to_si)  \
   || defined (L_si_to_sd) || defined (L_si_to_dd) || defined (L_si_to_td)
#define INT_KIND 1
#elif defined (L_sd_to_di) || defined (L_dd_to_di) || defined (L_td_to_di) \
   || defined (L_di_to_sd) || defined (L_di_to_dd) || defined (L_di_to_td)
#define INT_KIND 2
#elif defined (L_sd_to_usi) || defined (L_dd_to_usi) || defined (L_td_to_usi) \
   || defined (L_usi_to_sd) || defined (L_usi_to_dd) || defined (L_usi_to_td)
#define INT_KIND 3
#elif defined (L_sd_to_udi) || defined (L_dd_to_udi) || defined (L_td_to_udi) \
   || defined (L_udi_to_sd) || defined (L_udi_to_dd) || defined (L_udi_to_td)
#define INT_KIND 4
#endif

/*  If INT_KIND is defined, define additional macros:

    INT_TYPE: The integer data type.

    INT_FMT: The format string for writing the integer to a string.

    CAST_FOR_FMT: Cast variable of INT_KIND to C type for sprintf.
    This works for ILP32 and LP64, won't for other type size systems.

    STR_TO_INT: The function to read the integer from a string.  */

#if INT_KIND == 1
#define INT_TYPE SItype
#define INT_FMT "%d"
#define CAST_FOR_FMT(A) (int)A
#define STR_TO_INT strtol
#elif INT_KIND == 2
#define INT_TYPE DItype
#define INT_FMT "%lld"
#define CAST_FOR_FMT(A) (long long)A
#define STR_TO_INT strtoll
#elif INT_KIND == 3
#define INT_TYPE USItype
#define INT_FMT "%u"
#define CAST_FOR_FMT(A) (unsigned int)A
#define STR_TO_INT strtoul
#elif INT_KIND == 4
#define INT_TYPE UDItype
#define INT_FMT "%llu"
#define CAST_FOR_FMT(A) (unsigned long long)A
#define STR_TO_INT strtoull
#endif

/* Conversions between decimal float types and binary float types use
   BFP_KIND to determine the data type and C functions to use.  */

#if defined (L_sd_to_sf) || defined (L_dd_to_sf) || defined (L_td_to_sf) \
 || defined (L_sf_to_sd) || defined (L_sf_to_dd) || defined (L_sf_to_td)
#define BFP_KIND 1
#elif defined (L_sd_to_df) || defined (L_dd_to_df ) || defined (L_td_to_df) \
 ||   defined (L_df_to_sd) || defined (L_df_to_dd) || defined (L_df_to_td)
#define BFP_KIND 2
#elif defined (L_sd_to_xf) || defined (L_dd_to_xf ) || defined (L_td_to_xf) \
 ||   defined (L_xf_to_sd) || defined (L_xf_to_dd) || defined (L_xf_to_td)
#define BFP_KIND 3
#endif

/*  If BFP_KIND is defined, define additional macros:

    BFP_TYPE: The binary floating point data type.

    BFP_FMT: The format string for writing the value to a string.

    STR_TO_BFP: The function to read the value from a string.  */

#if BFP_KIND == 1
/* strtof is declared in <stdlib.h> only for C99.  */
extern float strtof (const char *, char **);
#define BFP_TYPE SFtype
#define BFP_FMT "%e"
#define STR_TO_BFP strtof

#elif BFP_KIND == 2
#define BFP_TYPE DFtype
#define BFP_FMT "%e"
#define STR_TO_BFP strtod

#elif BFP_KIND == 3
#if LIBGCC2_HAS_XF_MODE
/* These aren't used if XF mode is not supported.  */
#define BFP_TYPE XFtype
#define BFP_FMT "%e"
#define BFP_VIA_TYPE double
#define STR_TO_BFP strtod
#endif

#endif /* BFP_KIND */

#if WIDTH == 128 || WIDTH_TO == 128
#include "decimal128.h"
#endif
#if WIDTH == 64 || WIDTH_TO == 64
#include "decimal64.h"
#endif
#if WIDTH == 32 || WIDTH_TO == 32
#include "decimal32.h"
#endif
#include "decNumber.h"

/* Names of arithmetic functions.  */

#if WIDTH == 32
#define DFP_ADD                __addsd3
#define DFP_SUB                __subsd3
#define DFP_MULTIPLY        __mulsd3
#define DFP_DIVIDE        __divsd3
#define DFP_EQ                __eqsd2
#define DFP_NE                __nesd2
#define DFP_LT                __ltsd2
#define DFP_GT                __gtsd2
#define DFP_LE                __lesd2
#define DFP_GE                __gesd2
#define DFP_UNORD        __unordsd2
#elif WIDTH == 64
#define DFP_ADD                __adddd3
#define DFP_SUB                __subdd3
#define DFP_MULTIPLY        __muldd3
#define DFP_DIVIDE        __divdd3
#define DFP_EQ                __eqdd2
#define DFP_NE                __nedd2
#define DFP_LT                __ltdd2
#define DFP_GT                __gtdd2
#define DFP_LE                __ledd2
#define DFP_GE                __gedd2
#define DFP_UNORD        __unorddd2
#elif WIDTH == 128
#define DFP_ADD                __addtd3
#define DFP_SUB                __subtd3
#define DFP_MULTIPLY        __multd3
#define DFP_DIVIDE        __divtd3
#define DFP_EQ                __eqtd2
#define DFP_NE                __netd2
#define DFP_LT                __lttd2
#define DFP_GT                __gttd2
#define DFP_LE                __letd2
#define DFP_GE                __getd2
#define DFP_UNORD        __unordtd2
#endif

/* Names of functions to convert between different decimal float types.  */

#if WIDTH == 32
#if WIDTH_TO == 64
#define DFP_TO_DFP        __extendsddd2
#elif WIDTH_TO == 128
#define DFP_TO_DFP        __extendsdtd2
#endif
#elif WIDTH == 64        
#if WIDTH_TO == 32
#define DFP_TO_DFP        __truncddsd2
#elif WIDTH_TO == 128
#define DFP_TO_DFP        __extendddtd2
#endif
#elif WIDTH == 128
#if WIDTH_TO == 32
#define DFP_TO_DFP        __trunctdsd2
#elif WIDTH_TO == 64
#define DFP_TO_DFP        __trunctddd2
#endif
#endif

/* Names of functions to convert between decimal float and integers.  */

#if WIDTH == 32
#if INT_KIND == 1
#define INT_TO_DFP        __floatsisd
#define DFP_TO_INT        __fixsdsi
#elif INT_KIND == 2
#define INT_TO_DFP        __floatdisd
#define DFP_TO_INT        __fixsddi
#elif INT_KIND == 3
#define INT_TO_DFP        __floatunssisd
#define DFP_TO_INT        __fixunssdsi
#elif INT_KIND == 4
#define INT_TO_DFP        __floatunsdisd
#define DFP_TO_INT        __fixunssddi
#endif
#elif WIDTH == 64
#if INT_KIND == 1
#define INT_TO_DFP        __floatsidd
#define DFP_TO_INT        __fixddsi
#elif INT_KIND == 2
#define INT_TO_DFP        __floatdidd
#define DFP_TO_INT        __fixdddi
#elif INT_KIND == 3
#define INT_TO_DFP        __floatunssidd
#define DFP_TO_INT        __fixunsddsi
#elif INT_KIND == 4
#define INT_TO_DFP        __floatunsdidd
#define DFP_TO_INT        __fixunsdddi
#endif
#elif WIDTH == 128
#if INT_KIND == 1
#define INT_TO_DFP        __floatsitd
#define DFP_TO_INT        __fixtdsi
#elif INT_KIND == 2
#define INT_TO_DFP        __floatditd
#define DFP_TO_INT        __fixtddi
#elif INT_KIND == 3
#define INT_TO_DFP        __floatunssitd
#define DFP_TO_INT        __fixunstdsi
#elif INT_KIND == 4
#define INT_TO_DFP        __floatunsditd
#define DFP_TO_INT        __fixunstddi
#endif
#endif

/* Names of functions to convert between decimal float and binary float.  */

#if WIDTH == 32
#if BFP_KIND == 1
#define BFP_TO_DFP        __extendsfsd
#define DFP_TO_BFP        __truncsdsf
#elif BFP_KIND == 2
#define BFP_TO_DFP        __truncdfsd
#define DFP_TO_BFP        __extendsddf
#elif BFP_KIND == 3
#define BFP_TO_DFP        __truncxfsd
#define DFP_TO_BFP        __extendsdxf
#endif /* BFP_KIND */

#elif WIDTH == 64
#if BFP_KIND == 1
#define BFP_TO_DFP        __extendsfdd
#define DFP_TO_BFP        __truncddsf
#elif BFP_KIND == 2
#define BFP_TO_DFP        __extenddfdd
#define DFP_TO_BFP        __truncdddf
#elif BFP_KIND == 3
#define BFP_TO_DFP        __truncxfdd
#define DFP_TO_BFP        __extendddxf
#endif /* BFP_KIND */

#elif WIDTH == 128
#if BFP_KIND == 1
#define BFP_TO_DFP        __extendsftd
#define DFP_TO_BFP        __trunctdsf
#elif BFP_KIND == 2
#define BFP_TO_DFP        __extenddftd
#define DFP_TO_BFP        __trunctddf
#elif BFP_KIND == 3
#define BFP_TO_DFP        __extendxftd
#define DFP_TO_BFP        __trunctdxf
#endif /* BFP_KIND */

#endif /* WIDTH */

/* Some handy typedefs.  */

typedef float SFtype __attribute__ ((mode (SF)));
typedef float DFtype __attribute__ ((mode (DF)));
#if LIBGCC2_HAS_XF_MODE
typedef float XFtype __attribute__ ((mode (XF)));
#endif /* LIBGCC2_HAS_XF_MODE */

typedef int SItype __attribute__ ((mode (SI)));
typedef int DItype __attribute__ ((mode (DI)));
typedef unsigned int USItype __attribute__ ((mode (SI)));
typedef unsigned int UDItype __attribute__ ((mode (DI)));

/* The type of the result of a decimal float comparison.  This must
   match `word_mode' in GCC for the target.  */

typedef int CMPtype __attribute__ ((mode (word)));

/* Prototypes.  */

#if defined (L_mul_sd) || defined (L_mul_dd) || defined (L_mul_td)
extern DFP_C_TYPE DFP_MULTIPLY (DFP_C_TYPE, DFP_C_TYPE);
#endif

#if defined (L_div_sd) || defined (L_div_dd) || defined (L_div_td)
extern DFP_C_TYPE DFP_DIVIDE (DFP_C_TYPE, DFP_C_TYPE);
#endif

#if defined (L_addsub_sd) || defined (L_addsub_dd) || defined (L_addsub_td)
extern DFP_C_TYPE DFP_ADD (DFP_C_TYPE, DFP_C_TYPE);
extern DFP_C_TYPE DFP_SUB (DFP_C_TYPE, DFP_C_TYPE);
#endif

#if defined (L_eq_sd) || defined (L_eq_dd) || defined (L_eq_td)
extern CMPtype DFP_EQ (DFP_C_TYPE, DFP_C_TYPE);
#endif

#if defined (L_ne_sd) || defined (L_ne_dd) || defined (L_ne_td)
extern CMPtype DFP_NE (DFP_C_TYPE, DFP_C_TYPE);
#endif

#if defined (L_lt_sd) || defined (L_lt_dd) || defined (L_lt_td)
extern CMPtype DFP_LT (DFP_C_TYPE, DFP_C_TYPE);
#endif

#if defined (L_gt_sd) || defined (L_gt_dd) || defined (L_gt_td)
extern CMPtype DFP_GT (DFP_C_TYPE, DFP_C_TYPE);
#endif

#if defined (L_le_sd) || defined (L_le_dd) || defined (L_le_td)
extern CMPtype DFP_LE (DFP_C_TYPE, DFP_C_TYPE);
#endif

#if defined (L_ge_sd) || defined (L_ge_dd) || defined (L_ge_td)
extern CMPtype DFP_GE (DFP_C_TYPE, DFP_C_TYPE);
#endif

#if defined (L_unord_sd) || defined (L_unord_dd) || defined (L_unord_td)
extern CMPtype DFP_UNORD (DFP_C_TYPE, DFP_C_TYPE);
#endif

#if defined (L_sd_to_dd) || defined (L_sd_to_td) || defined (L_dd_to_sd) \
 || defined (L_dd_to_td) || defined (L_td_to_sd) || defined (L_td_to_dd)
extern DFP_C_TYPE_TO DFP_TO_DFP (DFP_C_TYPE);
#endif

#if defined (L_sd_to_si) || defined (L_dd_to_si) || defined (L_td_to_si) \
 || defined (L_sd_to_di) || defined (L_dd_to_di) || defined (L_td_to_di) \
 || defined (L_sd_to_usi) || defined (L_dd_to_usi) || defined (L_td_to_usi) \
 || defined (L_sd_to_udi) || defined (L_dd_to_udi) || defined (L_td_to_udi)
extern INT_TYPE DFP_TO_INT (DFP_C_TYPE);
#endif

#if defined (L_si_to_sd) || defined (L_si_to_dd) || defined (L_si_to_td) \
 || defined (L_di_to_sd) || defined (L_di_to_dd) || defined (L_di_to_td) \
 || defined (L_usi_to_sd) || defined (L_usi_to_dd) || defined (L_usi_to_td) \
 || defined (L_udi_to_sd) || defined (L_udi_to_dd) || defined (L_udi_to_td)
extern DFP_C_TYPE INT_TO_DFP (INT_TYPE);
#endif

#if defined (L_sd_to_sf) || defined (L_dd_to_sf) || defined (L_td_to_sf) \
 || defined (L_sd_to_df) || defined (L_dd_to_df) || defined (L_td_to_df) \
 || ((defined (L_sd_to_xf) || defined (L_dd_to_xf) || defined (L_td_to_xf)) \
     && LIBGCC2_HAS_XF_MODE)
extern BFP_TYPE DFP_TO_BFP (DFP_C_TYPE);
#endif

#if defined (L_sf_to_sd) || defined (L_sf_to_dd) || defined (L_sf_to_td) \
 || defined (L_df_to_sd) || defined (L_df_to_dd) || defined (L_df_to_td) \
 || ((defined (L_xf_to_sd) || defined (L_xf_to_dd) || defined (L_xf_to_td)) \
     && LIBGCC2_HAS_XF_MODE)
extern DFP_C_TYPE BFP_TO_DFP (BFP_TYPE);
#endif

#endif /* _DFPBIT_H */