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

   1 /* PR 23572 : warnings for out of range floating-point constants.  */
   2 /* { dg-do compile } */
   3 /* { dg-options "-std=c99" } */
   4 /* { dg-skip-if "No Inf support" { spu-*-* } } */
   5 #include <math.h>
   6
   7 #ifndef INFINITY
   8 #define INFINITY (__builtin_inff ())
   9 #endif
  10
  11 void overflow(void)
  12 {
  13   float f1 = 3.5E+38f;  /* { dg-warning "floating constant exceeds range" } */
  14   float f2 = -3.5E+38f; /* { dg-warning "floating constant exceeds range" } */
  15   float f3 = INFINITY;
  16   float f4 = -INFINITY;
  17
  18   double d1 = 1.9E+308;  /* { dg-warning "floating constant exceeds range" } */
  19   double d2 = -1.9E+308; /* { dg-warning "floating constant exceeds range" } */
  20   double d3 = INFINITY;
  21   double d4 = -INFINITY;
  22 }
  23
  24 void underflow(void)
  25 {
  26   float f11 = 3.3E-10000000000000000000f;  /* { dg-warning "floating constant truncated to zero" } */
  27   float f22 = -3.3E-10000000000000000000f; /* { dg-warning "floating constant truncated to zero" } */
  28   float f1 = 3.3E-46f;  /* { dg-warning "floating constant truncated to zero" } */
  29   float f2 = -3.3E-46f; /* { dg-warning "floating constant truncated to zero" } */
  30   float f3 = 0;
  31   float f4 = -0;
  32   float f5 = 0.0;
  33   float f6 = -0.0;
  34
  35   double d11 = 3.3E-10000000000000000000;  /* { dg-warning "floating constant truncated to zero" } */
  36   double d22 = -3.3E-10000000000000000000; /* { dg-warning "floating constant truncated to zero" } */
  37   double d1 = 1.4E-325;  /* { dg-warning "floating constant truncated to zero" } */
  38   double d2 = -1.4E-325; /* { dg-warning "floating constant truncated to zero" } */
  39   double d3 = 0;
  40   double d4 = -0;
  41   double d5 = 0.0;
  42   double d6 = -0.0;
  43 }