sdcc/support/regression/tests/bug3183823.c

   1 /*
   2    bug3183823.c
   3 */
   4
   5 #include <testfwk.h>
   6
   7 float neg (float x)
   8 {
   9         return -x;
  10 }
  11
  12 void testNeg (void)
  13 {
  14 #if !defined(__SDCC_pic16) && !defined(__SDCC_pdk14) // Lack of memory
  15         float x, y;
  16         char a, b;
  17
  18         x = neg(0.0);
  19         y = neg(-0.0);
  20         ASSERT (x==0.0);
  21         ASSERT (y==0.0);
  22         ASSERT (x==-0.0);
  23         ASSERT (y==-0.0);
  24         ASSERT (x==y);
  25         ASSERT (x>=y);
  26         ASSERT (x<=y);
  27         ASSERT (y>=x);
  28         ASSERT (y<=x);
  29
  30         a = ((char*)&x)[0];
  31         b = ((char*)&x)[3];
  32         ((char*)&x)[0] = b;
  33         ((char*)&x)[3] = a;
  34         ASSERT (x!=0.0);
  35 #endif
  36 }