message: PI/2 and PI/4 constants
diff: @@ -24,6 +24,8 @@ template <typename T> MATH_FUNC T log2_e() { return T(1.44269504088
  template <typename T> MATH_FUNC T pi() { return T(3.14159265358979323846264338328e+00); }
  template <typename T> MATH_FUNC T two_pi() { return T(6.28318530717958623199592693709e+00); }
  template <typename T> MATH_FUNC T inv_pi() { return T(3.18309886183790691216444201928e-01); }
  +template <typename T> MATH_FUNC T pi_over_two { return T(1.57079632679489655799898173427e+00); }
  +template <typename T> MATH_FUNC T pi_over_four { return T(7.85398163397448278999490867136e-01); }
  } // constants
  } // MATH_NAMESPACE
  