gcc/testsuite/gcc.dg/float-range-3.c

   1 /* PR 23572 : warnings for out of range floating-point constants.  */
   2 /* { dg-compile } */
   3 /* { dg-options "-std=c99" } */
   4 #include <math.h>
   5
   6 void overflow(void)
   7 {
   8   float f1 = 3.5E+38f;  /* { dg-warning "floating constant exceeds range" } */
   9   float f2 = -3.5E+38f; /* { dg-warning "floating constant exceeds range" } */
  10   float f3 = FP_INFINITE;
  11   float f4 = -FP_INFINITE;
  12
  13   double d1 = 1.9E+308;  /* { dg-warning "floating constant exceeds range" } */
  14   double d2 = -1.9E+308; /* { dg-warning "floating constant exceeds range" } */
  15   double d3 = FP_INFINITE;
  16   double d4 = -FP_INFINITE;
  17 }
  18
  19 void underflow(void)
  20 {
  21   float f11 = 3.3E-10000000000000000000f;  /* { dg-warning "floating constant truncated to zero" } */
  22   float f22 = -3.3E-10000000000000000000f; /* { dg-warning "floating constant truncated to zero" } */
  23   float f1 = 3.3E-46f;  /* { dg-warning "floating constant truncated to zero" } */
  24   float f2 = -3.3E-46f; /* { dg-warning "floating constant truncated to zero" } */
  25   float f3 = 0;
  26   float f4 = -0;
  27   float f5 = 0.0;
  28   float f6 = -0.0;
  29
  30   double d11 = 3.3E-10000000000000000000;  /* { dg-warning "floating constant truncated to zero" } */
  31   double d22 = -3.3E-10000000000000000000; /* { dg-warning "floating constant truncated to zero" } */
  32   double d1 = 1.4E-325;  /* { dg-warning "floating constant truncated to zero" } */
  33   double d2 = -1.4E-325; /* { dg-warning "floating constant truncated to zero" } */
  34   double d3 = 0;
  35   double d4 = -0;
  36   double d5 = 0.0;
  37   double d6 = -0.0;
  38 }