libstdc++-v3/testsuite/decimal/conversion-from-float.cc

   1 // Copyright (C) 2009-2015 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  3.2.2.2  Conversion from floating-point type (decimal32).
  21 // ISO/IEC TR 24733  3.2.3.2  Conversion from floating-point type (decimal64).
  22 // ISO/IEC TR 24733  3.2.4.2  Conversion from floating-point type (decimal128).
  23
  24 #include <decimal/decimal>
  25 #include <testsuite_hooks.h>
  26
  27 using namespace std::decimal;
  28
  29 void
  30 conversion_from_float_32 ()
  31 {
  32   bool test __attribute__((unused)) = true;
  33   decimal32 d32(123);
  34   decimal64 d64(234);
  35   decimal128 d128(345);
  36   float f = 456.F;
  37   double d = 567.;
  38   long double ld = 678.L;
  39
  40   d32 = (decimal32) d64;
  41   VERIFY (d32 == make_decimal32 (234LL, 0));
  42   d32 = (decimal32) d128;
  43   VERIFY (d32 == make_decimal32 (345LL, 0));
  44   d32 = (decimal32) f;
  45   VERIFY (d32 == make_decimal32 (456LL, 0));
  46   d32 = (decimal32) d;
  47   VERIFY (d32 == make_decimal32 (567LL, 0));
  48   d32 = (decimal32) ld;
  49   VERIFY (d32 == make_decimal32 (678LL, 0));
  50 }
  51
  52 void
  53 conversion_from_float_64 ()
  54 {
  55   bool test __attribute__((unused)) = true;
  56   decimal32 d32(123);
  57   decimal64 d64(234);
  58   decimal128 d128(345);
  59   float f = 456.F;
  60   double d = 567.;
  61   long double ld = 678.L;
  62
  63   d64 = d32;
  64   VERIFY (d64 == make_decimal64 (123LL, 0));
  65   d64 = (decimal64) d128;
  66   VERIFY (d64 == make_decimal64 (345LL, 0));
  67   d64 = (decimal64) f;
  68   VERIFY (d64 == make_decimal64 (456LL, 0));
  69   d64 = (decimal64) d;
  70   VERIFY (d64 == make_decimal64 (567LL, 0));
  71   d64 = (decimal64) ld;
  72   VERIFY (d64 == make_decimal64 (678LL, 0));
  73 }
  74
  75 void
  76 conversion_from_float_128 ()
  77 {
  78   bool test __attribute__((unused)) = true;
  79   decimal32 d32(123);
  80   decimal64 d64(234);
  81   decimal128 d128(345);
  82   float f = 456.F;
  83   double d = 567.;
  84   long double ld = 678.L;
  85
  86   d128 = d32;
  87   VERIFY (d128 == make_decimal128 (123LL, 0));
  88   d128 = d64;
  89   VERIFY (d128 == make_decimal128 (234LL, 0));
  90   d128 = (decimal128) f;
  91   VERIFY (d128 == make_decimal128 (456LL, 0));
  92   d128 = (decimal128) d;
  93   VERIFY (d128 == make_decimal128 (567LL, 0));
  94   d128 = (decimal128) ld;
  95   VERIFY (d128 == make_decimal128 (678LL, 0));
  96 }
  97
  98 int
  99 main ()
 100 {
 101   conversion_from_float_32 ();
 102   conversion_from_float_64 ();
 103   conversion_from_float_128 ();
 104 }