libstdc++-v3/testsuite/decimal/conversion-to-integral.cc

   1 // Copyright (C) 2009-2024 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 3, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 // { dg-require-effective-target dfp }
  19
  20 // ISO/IEC TR 24733  3.2.2.4  Conversion to integral type (decimal32).
  21 // ISO/IEC TR 24733  3.2.3.4  Conversion to integral type (decimal64).
  22 // ISO/IEC TR 24733  3.2.4.4  Conversion to integral type (decimal128).
  23
  24 #include <decimal/decimal>
  25 #include <climits>
  26 #include <testsuite_hooks.h>
  27
  28 // Use extension to replace implicit long long conversion with function call.
  29 #define LONGLONG(X) decimal_to_long_long(X)
  30
  31 using namespace std::decimal;
  32
  33 void
  34 conversion_to_integral_32 (void)
  35 {
  36   #undef MAXVAL
  37   #define MAXVAL 999999LL
  38   decimal32 a, b (1), c (-1), d (MAXVAL), e (-MAXVAL);
  39   long long ll;
  40
  41   ll = LONGLONG (a); VERIFY (ll == 0LL);
  42   ll = LONGLONG (b); VERIFY (ll == 1LL);
  43   ll = LONGLONG (c); VERIFY (ll == -1LL);
  44   ll = LONGLONG (d); VERIFY (ll == MAXVAL);
  45   ll = LONGLONG (e); VERIFY (ll == -MAXVAL);
  46 }
  47
  48 void
  49 conversion_to_integral_64 (void)
  50 {
  51   #undef MAXVAL
  52   #define MAXVAL 999999999999999LL
  53   decimal64 a, b (1), c (-1), d (MAXVAL), e (-MAXVAL);
  54   long long ll;
  55
  56   ll = LONGLONG (a); VERIFY (ll == 0LL);
  57   ll = LONGLONG (b); VERIFY (ll == 1LL);
  58   ll = LONGLONG (c); VERIFY (ll == -1LL);
  59   ll = LONGLONG (d); VERIFY (ll == MAXVAL);
  60   ll = LONGLONG (e); VERIFY (ll == -MAXVAL);
  61 }
  62
  63 void
  64 conversion_to_integral_128 (void)
  65 {
  66   #undef MAXVAL
  67   #define MAXVAL __LONG_LONG_MAX__
  68   decimal128 a, b (1), c (-1), d (MAXVAL), e (-MAXVAL);
  69   long long ll;
  70
  71   ll = LONGLONG (a); VERIFY (ll == 0LL);
  72   ll = LONGLONG (b); VERIFY (ll == 1LL);
  73   ll = LONGLONG (c); VERIFY (ll == -1LL);
  74   ll = LONGLONG (d); VERIFY (ll == MAXVAL);
  75   ll = LONGLONG (e); VERIFY (ll == -MAXVAL);
  76 }
  77
  78 int
  79 main ()
  80 {
  81   conversion_to_integral_32 ();
  82   conversion_to_integral_64 ();
  83   conversion_to_integral_128 ();
  84 }