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fixunssdti.c revision 1.1
      1 /* Software floating-point emulation.
      2    Convert _Decimal32 to 128bit unsigned integer.
      3 
      4    Copyright (C) 2023 Free Software Foundation, Inc.
      5 
      6 This file is part of GCC.
      7 
      8 GCC is free software; you can redistribute it and/or modify it under
      9 the terms of the GNU General Public License as published by the Free
     10 Software Foundation; either version 3, or (at your option) any later
     11 version.
     12 
     13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
     14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
     15 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
     16 for more details.
     17 
     18 Under Section 7 of GPL version 3, you are granted additional
     19 permissions described in the GCC Runtime Library Exception, version
     20 3.1, as published by the Free Software Foundation.
     21 
     22 You should have received a copy of the GNU General Public License and
     23 a copy of the GCC Runtime Library Exception along with this program;
     24 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
     25 <http://www.gnu.org/licenses/>.  */
     26 
     27 #include "soft-fp.h"
     28 #include "bitint.h"
     29 
     30 #if defined(__BITINT_MAXWIDTH__) && defined(__SIZEOF_INT128__)
     31 extern void __bid_fixsdbitint (UBILtype *, SItype, _Decimal32);
     32 extern UTItype __bid_fixunssdti (_Decimal32);
     33 
     34 UTItype
     35 __bid_fixunssdti (_Decimal32 a)
     36 {
     37   UBILtype rb[128 / BIL_TYPE_SIZE];
     38   __bid_fixsdbitint (rb, 128, a);
     39 #if BIL_TYPE_SIZE == 128
     40   return rb[0];
     41 #elif BIL_TYPE_SIZE == 64
     42   return ((((UTItype) rb[BITINT_END (0, 1)]) << 64)
     43 	  | rb[BITINT_END (1, 0)]);
     44 #elif BIL_TYPE_SIZE == 32
     45   return ((((UTItype) rb[BITINT_END (0, 3)]) << 96)
     46 	  | (((UTItype) rb[BITINT_END (1, 2)]) << 64)
     47 	  | (((UTItype) rb[BITINT_END (2, 1)]) << 32)
     48 	  | rb[BITINT_END (3, 0)]);
     49 #else
     50 #error Unsupported UBILtype
     51 #endif
     52 }
     53 #endif
     54