sdcc/support/regression/tests/bug-3276.c

   1 /* bug-3276.c
   2  * A billion became zero when converted to and from float.  Also test related range issues.
   3  */
   4
   5 #include <testfwk.h>
   6
   7 volatile unsigned long ul1;
   8 volatile unsigned long ul2;
   9 volatile float f1;
  10
  11 void
  12 testBug(void)
  13 {
  14 #if !defined(__SDCC_pdk14)
  15     ul1 = 1000000000ul;
  16     f1 = (float)ul1;
  17     ASSERT (f1 == 1000000000.0f);
  18     ul2 = (unsigned long)f1;
  19     ASSERT (ul2 == ul1);
  20     ul1 = 4000000000ul;
  21     f1 = (float)ul1;
  22     ASSERT (f1 == 4000000000.0f);
  23     ul2 = (unsigned long)f1;
  24     ASSERT (ul2 == ul1);
  25     ul1 = 0xfffffffful;
  26     f1 = (float)ul1;
  27     ASSERT (f1 == 4294967296.0f);
  28 #endif
  29 }