libstdc++-v3/testsuite/decimal/conversion-to-generic-float.cc

   1 // Copyright (C) 2009-2013 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  3.2.6  Conversion to generic floating-point type.
  21
  22 #include <decimal/decimal>
  23 #include <testsuite_hooks.h>
  24
  25 using namespace std::decimal;
  26
  27 void
  28 conversion_to_generic_float_32 ()
  29 {
  30   bool test __attribute__((unused)) = true;
  31   decimal32 d32(123);
  32   float f;
  33   double d;
  34   long double ld;
  35
  36   f = decimal32_to_float (d32);
  37   VERIFY (f == 123.F);
  38   d = decimal32_to_double (d32);
  39   VERIFY (d == 123.);
  40   ld = decimal32_to_long_double (d32);
  41   VERIFY (ld == 123.L);
  42
  43   d32++;
  44   f = decimal_to_float (d32);
  45   VERIFY (f == 124.F);
  46   d = decimal_to_double (d32);
  47   VERIFY (d == 124.);
  48   ld = decimal_to_long_double (d32);
  49   VERIFY (ld == 124.L);
  50 }
  51
  52 void
  53 conversion_to_generic_float_64 ()
  54 {
  55   bool test __attribute__((unused)) = true;
  56   decimal64 d64(234);
  57   float f;
  58   double d;
  59   long double ld;
  60
  61   f = decimal64_to_float (d64);
  62   VERIFY (f == 234.F);
  63   d = decimal64_to_double (d64);
  64   VERIFY (d == 234.);
  65   ld = decimal64_to_long_double (d64);
  66   VERIFY (ld == 234.L);
  67
  68   d64++;
  69   f = decimal_to_float (d64);
  70   VERIFY (f == 235.F);
  71   d = decimal_to_double (d64);
  72   VERIFY (d == 235.);
  73   ld = decimal_to_long_double (d64);
  74   VERIFY (ld == 235.L);
  75 }
  76
  77 void
  78 conversion_to_generic_float_128 ()
  79 {
  80   bool test __attribute__((unused)) = true;
  81   decimal128 d128(345);
  82   float f;
  83   double d;
  84   long double ld;
  85
  86   f = decimal128_to_float (d128);
  87   VERIFY (f == 345.F);
  88   d = decimal128_to_double (d128);
  89   VERIFY (d == 345.);
  90   ld = decimal128_to_long_double (d128);
  91   VERIFY (ld == 345.L);
  92
  93   d128++;
  94   f = decimal_to_float (d128);
  95   VERIFY (f == 346.F);
  96   d = decimal_to_double (d128);
  97   VERIFY (d == 346.);
  98   ld = decimal_to_long_double (d128);
  99   VERIFY (ld == 346.L);
 100 }
 101
 102 int
 103 main ()
 104 {
 105   conversion_to_generic_float_32 ();
 106   conversion_to_generic_float_64 ();
 107   conversion_to_generic_float_128 ();
 108 }