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      1 // This file is part of Eigen, a lightweight C++ template library
      2 // for linear algebra.
      3 //
      4 // Copyright (C) 2014 Benoit Steiner <benoit.steiner.goog (at) gmail.com>
      5 //
      6 // This Source Code Form is subject to the terms of the Mozilla
      7 // Public License v. 2.0. If a copy of the MPL was not distributed
      8 // with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
      9 
     10 #ifndef EIGEN_MATH_FUNCTIONS_CUDA_H
     11 #define EIGEN_MATH_FUNCTIONS_CUDA_H
     12 
     13 namespace Eigen {
     14 
     15 namespace internal {
     16 
     17 // Make sure this is only available when targeting a GPU: we don't want to
     18 // introduce conflicts between these packet_traits definitions and the ones
     19 // we'll use on the host side (SSE, AVX, ...)
     20 #if defined(__CUDACC__) && defined(EIGEN_USE_GPU)
     21 template<> EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE
     22 float4 plog<float4>(const float4& a)
     23 {
     24   return make_float4(logf(a.x), logf(a.y), logf(a.z), logf(a.w));
     25 }
     26 
     27 template<>  EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE
     28 double2 plog<double2>(const double2& a)
     29 {
     30   using ::log;
     31   return make_double2(log(a.x), log(a.y));
     32 }
     33 
     34 template<> EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE
     35 float4 plog1p<float4>(const float4& a)
     36 {
     37   return make_float4(log1pf(a.x), log1pf(a.y), log1pf(a.z), log1pf(a.w));
     38 }
     39 
     40 template<>  EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE
     41 double2 plog1p<double2>(const double2& a)
     42 {
     43   return make_double2(log1p(a.x), log1p(a.y));
     44 }
     45 
     46 template<> EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE
     47 float4 pexp<float4>(const float4& a)
     48 {
     49   return make_float4(expf(a.x), expf(a.y), expf(a.z), expf(a.w));
     50 }
     51 
     52 template<> EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE
     53 double2 pexp<double2>(const double2& a)
     54 {
     55   using ::exp;
     56   return make_double2(exp(a.x), exp(a.y));
     57 }
     58 
     59 template<> EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE
     60 float4 psqrt<float4>(const float4& a)
     61 {
     62   return make_float4(sqrtf(a.x), sqrtf(a.y), sqrtf(a.z), sqrtf(a.w));
     63 }
     64 
     65 template<> EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE
     66 double2 psqrt<double2>(const double2& a)
     67 {
     68   using ::sqrt;
     69   return make_double2(sqrt(a.x), sqrt(a.y));
     70 }
     71 
     72 template<> EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE
     73 float4 prsqrt<float4>(const float4& a)
     74 {
     75   return make_float4(rsqrtf(a.x), rsqrtf(a.y), rsqrtf(a.z), rsqrtf(a.w));
     76 }
     77 
     78 template<> EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE
     79 double2 prsqrt<double2>(const double2& a)
     80 {
     81   return make_double2(rsqrt(a.x), rsqrt(a.y));
     82 }
     83 
     84 
     85 #endif
     86 
     87 } // end namespace internal
     88 
     89 } // end namespace Eigen
     90 
     91 #endif // EIGEN_MATH_FUNCTIONS_CUDA_H
     92