15 #ifndef EIGEN_MATH_FUNCTIONS_ALTIVEC_H 16 #define EIGEN_MATH_FUNCTIONS_ALTIVEC_H 22 template<> EIGEN_DEFINE_FUNCTION_ALLOWING_MULTIPLE_DEFINITIONS EIGEN_UNUSED
23 Packet2d pexp<Packet2d>(
const Packet2d& _x)
27 _EIGEN_DECLARE_CONST_Packet2d(1 , 1.0);
28 _EIGEN_DECLARE_CONST_Packet2d(2 , 2.0);
29 _EIGEN_DECLARE_CONST_Packet2d(half, 0.5);
31 _EIGEN_DECLARE_CONST_Packet2d(exp_hi, 709.437);
32 _EIGEN_DECLARE_CONST_Packet2d(exp_lo, -709.436139303);
34 _EIGEN_DECLARE_CONST_Packet2d(cephes_LOG2EF, 1.4426950408889634073599);
36 _EIGEN_DECLARE_CONST_Packet2d(cephes_exp_p0, 1.26177193074810590878e-4);
37 _EIGEN_DECLARE_CONST_Packet2d(cephes_exp_p1, 3.02994407707441961300e-2);
38 _EIGEN_DECLARE_CONST_Packet2d(cephes_exp_p2, 9.99999999999999999910e-1);
40 _EIGEN_DECLARE_CONST_Packet2d(cephes_exp_q0, 3.00198505138664455042e-6);
41 _EIGEN_DECLARE_CONST_Packet2d(cephes_exp_q1, 2.52448340349684104192e-3);
42 _EIGEN_DECLARE_CONST_Packet2d(cephes_exp_q2, 2.27265548208155028766e-1);
43 _EIGEN_DECLARE_CONST_Packet2d(cephes_exp_q3, 2.00000000000000000009e0);
45 _EIGEN_DECLARE_CONST_Packet2d(cephes_exp_C1, 0.693145751953125);
46 _EIGEN_DECLARE_CONST_Packet2d(cephes_exp_C2, 1.42860682030941723212e-6);
52 x = pmax(pmin(x, p2d_exp_hi), p2d_exp_lo);
54 fx = pmadd(p2d_cephes_LOG2EF, x, p2d_half);
58 tmp = pmul(fx, p2d_cephes_exp_C1);
59 Packet2d z = pmul(fx, p2d_cephes_exp_C2);
63 Packet2d x2 = pmul(x,x);
65 Packet2d px = p2d_cephes_exp_p0;
66 px = pmadd(px, x2, p2d_cephes_exp_p1);
67 px = pmadd(px, x2, p2d_cephes_exp_p2);
70 Packet2d qx = p2d_cephes_exp_q0;
71 qx = pmadd(qx, x2, p2d_cephes_exp_q1);
72 qx = pmadd(qx, x2, p2d_cephes_exp_q2);
73 qx = pmadd(qx, x2, p2d_cephes_exp_q3);
75 x = pdiv(px,psub(qx,px));
76 x = pmadd(p2d_2,x,p2d_1);
79 emm0 = vec_ctsl(fx, 0);
81 static const Packet2l p2l_1023 = { 1023, 1023 };
82 static const Packet2ul p2ul_52 = { 52, 52 };
84 emm0 = emm0 + p2l_1023;
85 emm0 = emm0 << reinterpret_cast<Packet2l>(p2ul_52);
89 Packet2ul isnumber_mask =
reinterpret_cast<Packet2ul
>(vec_cmpeq(_x, _x));
90 return vec_sel(_x, pmax(pmul(x, reinterpret_cast<Packet2d>(emm0)), _x),
94 template<> EIGEN_DEFINE_FUNCTION_ALLOWING_MULTIPLE_DEFINITIONS EIGEN_UNUSED
95 Packet2d psqrt<Packet2d>(
const Packet2d& x)
97 return __builtin_s390_vfsqdb(x);
100 template<> EIGEN_DEFINE_FUNCTION_ALLOWING_MULTIPLE_DEFINITIONS EIGEN_UNUSED
101 Packet2d prsqrt<Packet2d>(
const Packet2d& x) {
103 return pset1<Packet2d>(1.0) / psqrt<Packet2d>(x);
110 #endif // EIGEN_MATH_FUNCTIONS_ALTIVEC_H Namespace containing all symbols from the Eigen library.
Definition: Core:287
Definition: Eigen_Colamd.h:50