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

   1 // Copyright (C) 2009 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 <cstdio>
  27 #include <testsuite_hooks.h>
  28
  29 // Use extension to replace implicit long long conversion with function call.
  30 #define LONGLONG(X) decimal_to_long_long(X)
  31
  32 using namespace std::decimal;
  33
  34 void
  35 conversion_to_integral_32 (void)
  36 {
  37   #undef MAXVAL
  38   #define MAXVAL 999999LL
  39   decimal32 a, b (1), c (-1), d (MAXVAL), e (-MAXVAL);
  40   long long ll;
  41
  42   ll = LONGLONG (a); VERIFY (ll == 0LL);
  43   ll = LONGLONG (b); VERIFY (ll == 1LL);
  44   ll = LONGLONG (c); VERIFY (ll == -1LL);
  45   ll = LONGLONG (d); VERIFY (ll == MAXVAL);
  46   ll = LONGLONG (e); VERIFY (ll == -MAXVAL);
  47 }
  48
  49 void
  50 conversion_to_integral_64 (void)
  51 {
  52   #undef MAXVAL
  53   #define MAXVAL 999999999999999LL
  54   decimal64 a, b (1), c (-1), d (MAXVAL), e (-MAXVAL);
  55   long long ll;
  56
  57   ll = LONGLONG (a); VERIFY (ll == 0LL);
  58   ll = LONGLONG (b); VERIFY (ll == 1LL);
  59   ll = LONGLONG (c); VERIFY (ll == -1LL);
  60   ll = LONGLONG (d); VERIFY (ll == MAXVAL);
  61   ll = LONGLONG (e); VERIFY (ll == -MAXVAL);
  62 }
  63
  64 void
  65 conversion_to_integral_128 (void)
  66 {
  67   #undef MAXVAL
  68   #define MAXVAL LONG_LONG_MAX
  69   decimal128 a, b (1), c (-1), d (MAXVAL), e (-MAXVAL);
  70   long long ll;
  71
  72   ll = LONGLONG (a); VERIFY (ll == 0LL);
  73   ll = LONGLONG (b); VERIFY (ll == 1LL);
  74   ll = LONGLONG (c); VERIFY (ll == -1LL);
  75   ll = LONGLONG (d); VERIFY (ll == MAXVAL);
  76   ll = LONGLONG (e); VERIFY (ll == -MAXVAL);
  77 }
  78
  79 int
  80 main ()
  81 {
  82   conversion_to_integral_32 ();
  83   conversion_to_integral_64 ();
  84   conversion_to_integral_128 ();
  85 }