modernc.org/ccgo/v3@v3.16.14/lib/testdata/gcc-9.1.0/gcc/testsuite/gcc.c-torture/execute/ieee/20010114-2.c (about)

     1  extern void exit (int);
     2  extern void abort (void);
     3  
     4  float
     5  rintf (float x)
     6  {
     7    static const float TWO23 = 8388608.0;
     8  
     9    if (__builtin_fabs (x) < TWO23)
    10      {
    11        if (x > 0.0)
    12          {
    13            x += TWO23;
    14            x -= TWO23;
    15          }
    16        else if (x < 0.0)
    17          {
    18            x = TWO23 - x;
    19            x = -(x - TWO23);
    20          }
    21      }
    22  
    23    return x;
    24  }
    25  
    26  int main (void)
    27  {
    28    if (rintf (-1.5) != -2.0)
    29      abort ();
    30    exit (0);
    31  }