gcc/testsuite/gcc.dg/fixed-point/addsub.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-std=gnu99" } */
   3
   4 /* Check if GCC generates warnings when overflows.  */
   5
   6 _Fract a0 = 0.5r + 0.5r; /* { dg-warning "overflow" } */
   7 _Fract a1 = 0.5r + 0.6r; /* { dg-warning "overflow" } */
   8 _Fract a2 = 0.5r + -0.6r;
   9 _Fract a3 = -0.5r + 0.6r;
  10 _Fract a4 = -0.5r + -0.5r;
  11 _Fract a5 = -0.5r + -0.6r; /* { dg-warning "overflow" } */
  12 _Fract a6 = 0.0r + __FRACT_MIN__;
  13 _Fract a7 = 0.1r + __FRACT_MIN__;
  14 _Fract a8 = -0.1r + __FRACT_MIN__; /* { dg-warning "overflow" } */
  15 _Fract a9 = 0.0r + __FRACT_MAX__;
  16 _Fract a10 = 0.1r + __FRACT_MAX__; /* { dg-warning "overflow" } */
  17 _Fract a11 = -0.1r + __FRACT_MAX__;
  18
  19 _Fract b0 = 0.5r - 0.5r;
  20 _Fract b1 = 0.5r - 0.6r;
  21 _Fract b2 = 0.5r - -0.6r; /* { dg-warning "overflow" } */
  22 _Fract b3 = -0.5r - 0.6r; /* { dg-warning "overflow" } */
  23 _Fract b4 = -0.5r - -0.5r;
  24 _Fract b5 = -0.5r - -0.6r;
  25 _Fract b6 = 0.0r - __FRACT_MIN__; /* { dg-warning "overflow" } */
  26 _Fract b7 = 0.1r - __FRACT_MIN__; /* { dg-warning "overflow" } */
  27 _Fract b8 = -0.1r - __FRACT_MIN__;
  28 _Fract b9 = 0.0r - __FRACT_MAX__;
  29 _Fract b10 = 0.1r - __FRACT_MAX__;
  30 _Fract b11 = -0.1r - __FRACT_MAX__; /* { dg-warning "overflow" } */