gcc/testsuite/gcc.dg/dfp/convert-bfp-fold.c

   1 /* { dg-options "-O2" } */
   2
   3 /* N1150 5.2 Conversions among decimal floating types and between
   4    decimal floating types and generic floating types.
   5    C99 6.3.1.5(4) Conversions, arithmetic operands, real floating types.  */
   6
   7 _Decimal32 d32;
   8 _Decimal64 d64;
   9 _Decimal128 d128;
  10 float sf;
  11 double df;
  12 long double tf;
  13
  14 extern void link_error (void);
  15
  16 int
  17 main ()
  18 {
  19   /* Conversions from decimal float to binary float. */
  20
  21   /* Conversions from _Decimal32. */
  22   d32 = 2.0df;
  23   sf = d32;
  24   if (sf != 2.0f)
  25     link_error ();
  26
  27   df = d32;
  28   if (df != 2.0)
  29     link_error ();
  30
  31   tf = d32;
  32   if (tf != 2.0l)
  33     link_error ();
  34
  35   /* Conversions from _Decimal64. */
  36   d64 = -7.0dd;
  37   sf = d64;
  38   if (sf != -7.0f)
  39     link_error ();
  40
  41   df = d64;
  42   if (df != -7.0)
  43     link_error ();
  44
  45   tf = d64;
  46   if (tf != -7.0l)
  47     link_error ();
  48
  49   /* Conversions from _Decimal128. */
  50   d128 = 30.0dl;
  51   sf = d128;
  52   if (sf != 30.0f)
  53     link_error ();
  54
  55   df = d128;
  56   if (df != 30.0)
  57     link_error ();
  58
  59   df = d128;
  60   if (df != 30.0l)
  61     link_error ();
  62
  63   /* Conversions from binary float to decimal float. */
  64   sf = 30.0f;
  65   d128 = sf;
  66   if (d128 != 30.0dl)
  67     link_error ();
  68
  69   d64 = sf;
  70   if (d64 != 30.0dd)
  71     link_error ();
  72
  73   d32 = sf;
  74   if (d32 != 30.0df)
  75     link_error ();
  76
  77   df = -2.0;
  78   d128 = df;
  79   if (d128 != -2.0dl)
  80     link_error ();
  81
  82   d64 = df;
  83   if (d64 != -2.0dd)
  84     link_error ();
  85
  86   d32 = df;
  87   if (d32 != -2.0df)
  88     link_error ();
  89
  90   tf = -22.0l;
  91   d128 = tf;
  92   if (d128 != -22.0dl)
  93     link_error ();
  94
  95   d64 = tf;
  96   if (d64 != -22.0dd)
  97     link_error ();
  98
  99   d32 = tf;
 100   if (d32 != -22.0df)
 101     link_error ();
 102
 103   /* 2**(-11) = 0.00048828125. */
 104   d128 = 0.000488281251dl;
 105   sf = d128;
 106   if (sf != 0.00048828125f)
 107     link_error ();
 108   /* 2**(-25) = 0.298023223876953125E-7.  */
 109   d128 = 2.98023223876953125E-8dl;
 110   df = d128;
 111   if (df < (2.9802322387695312e-08 - 0.00000000001)
 112       || df > (2.9802322387695312e-08 + 0.00000000001))
 113     link_error ();
 114
 115   return 0;
 116 }