modernc.org/ccgo/v3@v3.16.14/lib/testdata/gcc-9.1.0/gcc/testsuite/gcc.c-torture/execute/20040208-1.c (about)

     1  int main ()
     2  {
     3    long double x;
     4  
     5    x = 0x1.0p-500L;
     6    x *= 0x1.0p-522L;
     7    if (x != 0x1.0p-1022L)
     8      abort ();
     9    exit (0);
    10  }