1  /* Copyright (C) 2007-2023 Free Software Foundation, Inc.
       2  
       3  This file is part of GCC.
       4  
       5  GCC is free software; you can redistribute it and/or modify it under
       6  the terms of the GNU General Public License as published by the Free
       7  Software Foundation; either version 3, or (at your option) any later
       8  version.
       9  
      10  GCC is distributed in the hope that it will be useful, but WITHOUT ANY
      11  WARRANTY; without even the implied warranty of MERCHANTABILITY or
      12  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
      13  for more details.
      14  
      15  Under Section 7 of GPL version 3, you are granted additional
      16  permissions described in the GCC Runtime Library Exception, version
      17  3.1, as published by the Free Software Foundation.
      18  
      19  You should have received a copy of the GNU General Public License and
      20  a copy of the GCC Runtime Library Exception along with this program;
      21  see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
      22  <http://www.gnu.org/licenses/>.  */
      23  
      24  #define decimal32FromString __dpd32FromString
      25  #define decimal32ToString __dpd32ToString
      26  #define decimal32ToEngString __dpd32ToEngString
      27  #define decimal32FromNumber __dpd32FromNumber
      28  #define decimal32ToNumber __dpd32ToNumber
      29  
      30  #include "dpd/decimal32.c"
      31  
      32  #undef decimal32FromString
      33  #undef decimal32ToString
      34  #undef decimal32ToEngString
      35  #undef decimal32FromNumber
      36  #undef decimal32ToNumber
      37  
      38  #include "bid-dpd.h"
      39  
      40  #ifdef IN_LIBGCC2
      41  #define decimal32FromString __decimal32FromString
      42  #define decimal32ToString __decimal32ToString
      43  #define decimal32ToEngString __decimal32ToEngString
      44  #define decimal32FromNumber __decimal32FromNumber
      45  #define decimal32ToNumber __decimal32ToNumber
      46  #endif
      47  
      48  decimal32 *decimal32FromString (decimal32 *, const char *, decContext *);
      49  char *decimal32ToString (const decimal32 *, char *);
      50  char *decimal32ToEngString (const decimal32 *, char *);
      51  decimal32 *decimal32FromNumber (decimal32 *, const decNumber *, decContext *);
      52  decNumber *decimal32ToNumber (const decimal32 *, decNumber *);
      53  
      54  void __host_to_ieee_32 (_Decimal32 in, decimal32 *out);
      55  void __ieee_to_host_32 (decimal32 in, _Decimal32 *out);
      56  
      57  decimal32 *
      58  decimal32FromNumber (decimal32 *d32, const decNumber *dn,
      59  		      decContext *set)
      60  {
      61    /* decimal32 and _Decimal32 are different types.  */
      62    union
      63      {
      64        _Decimal32 _Dec;
      65        decimal32 dec;
      66      } u;
      67  
      68    __dpd32FromNumber (d32, dn, set);
      69  
      70    /* __dpd32FromNumber returns in big endian. But _dpd_to_bid32 takes
      71       host endian. */
      72    __ieee_to_host_32 (*d32, &u._Dec);
      73  
      74    /* Convert DPD to BID.  */
      75    _dpd_to_bid32 (&u._Dec, &u._Dec);
      76  
      77    /* dfp.c is in bid endian. */
      78    __host_to_ieee_32 (u._Dec, &u.dec);
      79  
      80    /* d32 is returned as a pointer to _Decimal32 here.  */
      81    *d32 = u.dec;
      82  
      83    return d32;
      84  }
      85  
      86  decNumber *
      87  decimal32ToNumber (const decimal32 *bid32, decNumber *dn)
      88  {
      89    /* decimal32 and _Decimal32 are different types.  */
      90    union
      91      {
      92        _Decimal32 _Dec;
      93        decimal32 dec;
      94      } u;
      95  
      96    /* bid32 is a pointer to _Decimal32 in bid endian. But _bid_to_dpd32
      97       takes host endian.  */
      98    __ieee_to_host_32 (*bid32, &u._Dec);
      99  
     100    /* Convert BID to DPD.  */
     101    _bid_to_dpd32 (&u._Dec, &u._Dec);
     102  
     103    /* __dpd32ToNumber is in bid endian.  */
     104    __host_to_ieee_32 (u._Dec, &u.dec);
     105  
     106    return __dpd32ToNumber (&u.dec, dn);
     107  }
     108  
     109  char *
     110  decimal32ToString (const decimal32 *d32, char *string)
     111  {
     112    decNumber dn;			/* work */
     113    decimal32ToNumber (d32, &dn);
     114    decNumberToString (&dn, string);
     115    return string;
     116  }
     117  
     118  char *
     119  decimal32ToEngString (const decimal32 *d32, char *string)
     120  {
     121    decNumber dn;			/* work */
     122    decimal32ToNumber (d32, &dn);
     123    decNumberToEngString (&dn, string);
     124    return string;
     125  }
     126  
     127  decimal32 *
     128  decimal32FromString (decimal32 *result, const char *string,
     129  		      decContext *set)
     130  {
     131    decContext dc;		/* work */
     132    decNumber dn;			/* .. */
     133  
     134    decContextDefault (&dc, DEC_INIT_DECIMAL32);	/* no traps, please */
     135    dc.round = set->round;	/* use supplied rounding */
     136  
     137    decNumberFromString (&dn, string, &dc);	/* will round if needed */
     138    decimal32FromNumber (result, &dn, &dc);
     139    if (dc.status != 0)
     140      {				/* something happened */
     141        decContextSetStatus (set, dc.status);	/* .. pass it on */
     142      }
     143    return result;
     144  }