11 #ifndef EIGEN_MATHFUNCTIONSIMPL_H 12 #define EIGEN_MATHFUNCTIONSIMPL_H 26 T generic_fast_tanh_float(
const T& a_x)
30 const T plus_9 = pset1<T>(9.f);
31 const T minus_9 = pset1<T>(-9.f);
37 const T x = pmax(minus_9,pmin(plus_9,a_x));
39 const T alpha_1 = pset1<T>(4.89352455891786e-03f);
40 const T alpha_3 = pset1<T>(6.37261928875436e-04f);
41 const T alpha_5 = pset1<T>(1.48572235717979e-05f);
42 const T alpha_7 = pset1<T>(5.12229709037114e-08f);
43 const T alpha_9 = pset1<T>(-8.60467152213735e-11f);
44 const T alpha_11 = pset1<T>(2.00018790482477e-13f);
45 const T alpha_13 = pset1<T>(-2.76076847742355e-16f);
48 const T beta_0 = pset1<T>(4.89352518554385e-03f);
49 const T beta_2 = pset1<T>(2.26843463243900e-03f);
50 const T beta_4 = pset1<T>(1.18534705686654e-04f);
51 const T beta_6 = pset1<T>(1.19825839466702e-06f);
54 const T x2 = pmul(x, x);
57 T p = pmadd(x2, alpha_13, alpha_11);
58 p = pmadd(x2, p, alpha_9);
59 p = pmadd(x2, p, alpha_7);
60 p = pmadd(x2, p, alpha_5);
61 p = pmadd(x2, p, alpha_3);
62 p = pmadd(x2, p, alpha_1);
66 T q = pmadd(x2, beta_6, beta_4);
67 q = pmadd(x2, q, beta_2);
68 q = pmadd(x2, q, beta_0);
78 #endif // EIGEN_MATHFUNCTIONSIMPL_H Namespace containing all symbols from the Eigen library.
Definition: Core:287
Definition: Eigen_Colamd.h:50