#ifdef __GNUC__
#include <fenv.h>
#include <assert.h>

float nondet_float();
int nondet_int();

float castWithRounding (int rounding_mode, int value)
{
  int returnValue = fesetround(rounding_mode);

  assert(returnValue == 0);

  return (float)value;
}
#endif

int main(void)
{
  #ifdef __GNUC__
  float low = 0x1p+25f;          // 33554432
  float high = 0x1.000002p+25f;  // 33554436
  float higher = 0x1.000004p+25f;// 33554440

  // There are no other floating point numbers between these
  float other = nondet_float();
  assert(!((low < other) && (other < high)));

  // Inference tests
  int x = nondet_int();

  // x is 33554433, 33554434 or 33554435
  __CPROVER_assume((33554432 < x) && (x < 33554436));

  assert((castWithRounding(FE_TONEAREST,x) == high) ==
	 (x == 33554435));

  #ifdef FE_UPWARD
  assert(castWithRounding(FE_UPWARD,x) == high);
  assert(castWithRounding(FE_UPWARD,-x) == -low);
  #endif

  #ifdef FE_DOWNWARD
  assert(castWithRounding(FE_DOWNWARD,x) == low);
  assert(castWithRounding(FE_DOWNWARD,-x) == -high);
  #endif
  
  assert(castWithRounding(FE_TOWARDZERO,x) == low);
  assert(castWithRounding(FE_TOWARDZERO,-x) == -low);
  #endif
}
