diff options
| author | Stanislaw Halik <sthalik@misaki.pl> | 2019-03-03 21:09:10 +0100 |
|---|---|---|
| committer | Stanislaw Halik <sthalik@misaki.pl> | 2019-03-03 21:10:13 +0100 |
| commit | f0238cfb6997c4acfc2bd200de7295f3fa36968f (patch) | |
| tree | b215183760e4f615b9c1dabc1f116383b72a1b55 /eigen/unsupported/Eigen/src/MoreVectorization | |
| parent | 543edd372a5193d04b3de9f23c176ab439e51b31 (diff) | |
don't index Eigen
Diffstat (limited to 'eigen/unsupported/Eigen/src/MoreVectorization')
| -rw-r--r-- | eigen/unsupported/Eigen/src/MoreVectorization/MathFunctions.h | 95 |
1 files changed, 0 insertions, 95 deletions
diff --git a/eigen/unsupported/Eigen/src/MoreVectorization/MathFunctions.h b/eigen/unsupported/Eigen/src/MoreVectorization/MathFunctions.h deleted file mode 100644 index 63cb28d..0000000 --- a/eigen/unsupported/Eigen/src/MoreVectorization/MathFunctions.h +++ /dev/null @@ -1,95 +0,0 @@ -// This file is part of Eigen, a lightweight C++ template library -// for linear algebra. -// -// Copyright (C) 2009 Rohit Garg <rpg.314@gmail.com> -// Copyright (C) 2009 Benoit Jacob <jacob.benoit.1@gmail.com> -// -// This Source Code Form is subject to the terms of the Mozilla -// Public License v. 2.0. If a copy of the MPL was not distributed -// with this file, You can obtain one at http://mozilla.org/MPL/2.0/. - -#ifndef EIGEN_MOREVECTORIZATION_MATHFUNCTIONS_H -#define EIGEN_MOREVECTORIZATION_MATHFUNCTIONS_H - -namespace Eigen { - -namespace internal { - -/** \internal \returns the arcsin of \a a (coeff-wise) */ -template<typename Packet> inline static Packet pasin(Packet a) { return std::asin(a); } - -#ifdef EIGEN_VECTORIZE_SSE - -template<> EIGEN_DONT_INLINE Packet4f pasin(Packet4f x) -{ - _EIGEN_DECLARE_CONST_Packet4f(half, 0.5); - _EIGEN_DECLARE_CONST_Packet4f(minus_half, -0.5); - _EIGEN_DECLARE_CONST_Packet4f(3half, 1.5); - - _EIGEN_DECLARE_CONST_Packet4f_FROM_INT(sign_mask, 0x80000000); - - _EIGEN_DECLARE_CONST_Packet4f(pi, 3.141592654); - _EIGEN_DECLARE_CONST_Packet4f(pi_over_2, 3.141592654*0.5); - - _EIGEN_DECLARE_CONST_Packet4f(asin1, 4.2163199048E-2); - _EIGEN_DECLARE_CONST_Packet4f(asin2, 2.4181311049E-2); - _EIGEN_DECLARE_CONST_Packet4f(asin3, 4.5470025998E-2); - _EIGEN_DECLARE_CONST_Packet4f(asin4, 7.4953002686E-2); - _EIGEN_DECLARE_CONST_Packet4f(asin5, 1.6666752422E-1); - - Packet4f a = pabs(x);//got the absolute value - - Packet4f sign_bit= _mm_and_ps(x, p4f_sign_mask);//extracted the sign bit - - Packet4f z1,z2;//will need them during computation - - -//will compute the two branches for asin -//so first compare with half - - Packet4f branch_mask= _mm_cmpgt_ps(a, p4f_half);//this is to select which branch to take -//both will be taken, and finally results will be merged -//the branch for values >0.5 - - { -//the core series expansion - z1=pmadd(p4f_minus_half,a,p4f_half); - Packet4f x1=psqrt(z1); - Packet4f s1=pmadd(p4f_asin1, z1, p4f_asin2); - Packet4f s2=pmadd(s1, z1, p4f_asin3); - Packet4f s3=pmadd(s2,z1, p4f_asin4); - Packet4f s4=pmadd(s3,z1, p4f_asin5); - Packet4f temp=pmul(s4,z1);//not really a madd but a mul by z so that the next term can be a madd - z1=pmadd(temp,x1,x1); - z1=padd(z1,z1); - z1=psub(p4f_pi_over_2,z1); - } - - { -//the core series expansion - Packet4f x2=a; - z2=pmul(x2,x2); - Packet4f s1=pmadd(p4f_asin1, z2, p4f_asin2); - Packet4f s2=pmadd(s1, z2, p4f_asin3); - Packet4f s3=pmadd(s2,z2, p4f_asin4); - Packet4f s4=pmadd(s3,z2, p4f_asin5); - Packet4f temp=pmul(s4,z2);//not really a madd but a mul by z so that the next term can be a madd - z2=pmadd(temp,x2,x2); - } - -/* select the correct result from the two branch evaluations */ - z1 = _mm_and_ps(branch_mask, z1); - z2 = _mm_andnot_ps(branch_mask, z2); - Packet4f z = _mm_or_ps(z1,z2); - -/* update the sign */ - return _mm_xor_ps(z, sign_bit); -} - -#endif // EIGEN_VECTORIZE_SSE - -} // end namespace internal - -} // end namespace Eigen - -#endif // EIGEN_MOREVECTORIZATION_MATHFUNCTIONS_H |
