1  struct ieee754_double {
       2    double d;
       3  };
       4  extern const float __exp_deltatable[178];
       5  float __ieee754_expf (float x)
       6  {
       7    static const float himark = 88.72283935546875;
       8    static const float lomark = -103.972084045410;
       9    if (__builtin_isless(x, himark) && __builtin_isgreater(x, lomark))
      10      {
      11        int tval;
      12        double x22, t, result, dx;
      13        float delta;
      14        struct ieee754_double ex2_u;
      15        dx -= t;
      16        tval = (int) (t * 512.0);
      17        if (t >= 0)
      18  	delta = - __exp_deltatable[tval];
      19        else
      20  	delta = __exp_deltatable[-tval];
      21        x22 = (0.5000000496709180453 * dx + 1.0000001192102037084) * dx + delta;
      22        result = x22 * ex2_u.d + ex2_u.d;
      23        return (float) result;
      24      }
      25    return x;
      26  }