fdfd62d43a
1. Add a 'FastVec' class that copies input vector types to an efficient
Vec type on the stack. Specializations avoid copies of already efficient
types.
2. Update 'WorldCoordinatesToParametricCoordinates' functions to utilize the
'FastVec' class. This should improve performance when the passed in
vectors are of slow types like 'vtkm::VecFromPortalPermute'.
3. Since most input Vec types will convert to the same 'FastVec' type this
also reduces the code generations. Some code refactoring was required for
this.
97 lines
2.7 KiB
C++
97 lines
2.7 KiB
C++
//============================================================================
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// Copyright (c) Kitware, Inc.
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// All rights reserved.
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// See LICENSE.txt for details.
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// This software is distributed WITHOUT ANY WARRANTY; without even
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// the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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// PURPOSE. See the above copyright notice for more information.
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//
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// Copyright 2015 National Technology & Engineering Solutions of Sandia, LLC (NTESS).
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// Copyright 2015 UT-Battelle, LLC.
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// Copyright 2015 Los Alamos National Security.
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//
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// Under the terms of Contract DE-NA0003525 with NTESS,
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// the U.S. Government retains certain rights in this software.
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//
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// Under the terms of Contract DE-AC52-06NA25396 with Los Alamos National
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// Laboratory (LANL), the U.S. Government retains certain rights in
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// this software.
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//============================================================================
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#ifndef vtk_m_exec_internal_FastVec_h
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#define vtk_m_exec_internal_FastVec_h
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#include <vtkm/Types.h>
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#include <vtkm/VecVariable.h>
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namespace vtkm
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{
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namespace exec
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{
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namespace internal
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{
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/// Use this class to convert Vecs of any type to an efficient stack based Vec
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/// type. The template parameters are the input Vec type and the maximum
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/// number of components it may have. Specializations exist to optimize
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/// the copy and stack usage away for already efficient types.
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/// This class is useful when several accesses will be performed on
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/// potentially inefficient Vec types such as VecFromPortalPermute.
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///
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template <typename VecType, vtkm::IdComponent MaxSize>
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class FastVec
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{
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public:
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using Type = vtkm::VecVariable<typename VecType::ComponentType, MaxSize>;
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explicit VTKM_EXEC FastVec(const VecType& vec)
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: Vec(vec)
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{
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}
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VTKM_EXEC const Type& Get() const { return this->Vec; }
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private:
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Type Vec;
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};
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template <typename ComponentType, vtkm::IdComponent NumComponents, vtkm::IdComponent MaxSize>
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class FastVec<vtkm::Vec<ComponentType, NumComponents>, MaxSize>
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{
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public:
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using Type = vtkm::Vec<ComponentType, NumComponents>;
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explicit VTKM_EXEC FastVec(const Type& vec)
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: Vec(vec)
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{
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VTKM_ASSERT(vec.GetNumberOfComponents() <= MaxSize);
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}
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VTKM_EXEC const Type& Get() const { return this->Vec; }
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private:
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const Type& Vec;
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};
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template <typename ComponentType, vtkm::IdComponent MaxSize1, vtkm::IdComponent MaxSize2>
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class FastVec<vtkm::VecVariable<ComponentType, MaxSize1>, MaxSize2>
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{
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public:
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using Type = vtkm::VecVariable<ComponentType, MaxSize1>;
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explicit VTKM_EXEC FastVec(const Type& vec)
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: Vec(vec)
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{
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VTKM_ASSERT(vec.GetNumberOfComponents() <= MaxSize2);
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}
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VTKM_EXEC const Type& Get() const { return this->Vec; }
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private:
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const Type& Vec;
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};
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}
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}
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} // vtkm::exec::internal
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#endif // vtk_m_exec_internal_FastVec_h
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