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fparith_double_neg.c (347B)

      1 /* Double FNEG round-trip. volatile int input -> double, negate, negate back via
      2  * subtraction so a real FNEG (double) is emitted. -(-42.0) = 42.0;
      3  * (int)42.0 == 42. */
      4 int test_main(void) {
      5   volatile int ia = 42;
      6   double a = (double)ia;
      7   double r = -a; /* FNEG: -42.0 */
      8   double s = -r; /* FNEG: 42.0  */
      9   return (int)s == 42 ? 42 : 0;
     10 }