summaryrefslogtreecommitdiffhomepage
path: root/eigen/unsupported/Eigen/src/MoreVectorization
diff options
context:
space:
mode:
authorStanislaw Halik <sthalik@misaki.pl>2019-03-03 21:09:10 +0100
committerStanislaw Halik <sthalik@misaki.pl>2019-03-03 21:10:13 +0100
commitf0238cfb6997c4acfc2bd200de7295f3fa36968f (patch)
treeb215183760e4f615b9c1dabc1f116383b72a1b55 /eigen/unsupported/Eigen/src/MoreVectorization
parent543edd372a5193d04b3de9f23c176ab439e51b31 (diff)
don't index Eigen
Diffstat (limited to 'eigen/unsupported/Eigen/src/MoreVectorization')
-rw-r--r--eigen/unsupported/Eigen/src/MoreVectorization/MathFunctions.h95
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