extern void abort(void);
extern void __assert_fail(const char *, const char *, unsigned int, const char *) __attribute__ ((__nothrow__ , __leaf__)) __attribute__ ((__noreturn__));
void reach_error() { __assert_fail("0", "float_req_bl_1381.c", 3, "reach_error"); }
extern float __VERIFIER_nondet_float();

typedef int __int32_t;
typedef unsigned int __uint32_t;

typedef union {
  float value;
  __uint32_t word;
} ieee_float_shape_type;

float copysign_float(float x, float y) {
  __uint32_t ix, iy;
  do {
    ieee_float_shape_type gf_u;
    gf_u.value = (x);
    (ix) = gf_u.word;
  } while (0);
  do {
    ieee_float_shape_type gf_u;
    gf_u.value = (y);
    (iy) = gf_u.word;
  } while (0);
  do {
    ieee_float_shape_type sf_u;
    sf_u.word = ((ix & 0x7fffffff) | (iy & 0x80000000));
    (x) = sf_u.value;
  } while (0);
  return x;
}

// nan check for floats
int isnan_float(float x) { return x != x; }

int main() {

  /*
   * REQ-BL-1381:
   * The copysign and copysignf procedures shall return NaN if the argument x is
   * NaN .
   */

  float x = 0.0f / 0.0f; // NAN
  float y = __VERIFIER_nondet_float();
  float res = copysign_float(x, y);

  // x is nan, y can be any, the result shall be NAN
  if (!isnan_float(res)) {
    {reach_error();}
    return 1;
  }

  return 0;
}