219 lines
6.7 KiB
C++
219 lines
6.7 KiB
C++
/*
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//@HEADER
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// ************************************************************************
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//
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// Kokkos v. 3.0
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// Copyright (2020) National Technology & Engineering
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// Solutions of Sandia, LLC (NTESS).
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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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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// 1. Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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//
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// 3. Neither the name of the Corporation nor the names of the
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY NTESS "AS IS" AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL NTESS OR THE
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// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// Questions? Contact Christian R. Trott (crtrott@sandia.gov)
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//
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// ************************************************************************
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//@HEADER
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*/
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#ifndef KOKKOS_BLAS_KERNELS_HPP
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#define KOKKOS_BLAS_KERNELS_HPP
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#include <type_traits>
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namespace Kokkos {
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template <class Type>
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struct Dot {
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using execution_space = typename Type::execution_space;
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static_assert(static_cast<unsigned>(Type::Rank) == static_cast<unsigned>(1),
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"Dot static_assert Fail: Rank != 1");
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using value_type = double;
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#if 1
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typename Type::const_type X;
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typename Type::const_type Y;
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#else
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Type X;
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Type Y;
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#endif
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Dot(const Type& arg_x, const Type& arg_y) : X(arg_x), Y(arg_y) {}
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KOKKOS_INLINE_FUNCTION
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void operator()(int i, value_type& update) const { update += X[i] * Y[i]; }
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KOKKOS_INLINE_FUNCTION
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static void join(volatile value_type& update,
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const volatile value_type& source) {
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update += source;
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}
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KOKKOS_INLINE_FUNCTION
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static void init(value_type& update) { update = 0; }
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};
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template <class Type>
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struct DotSingle {
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using execution_space = typename Type::execution_space;
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static_assert(static_cast<unsigned>(Type::Rank) == static_cast<unsigned>(1),
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"DotSingle static_assert Fail: Rank != 1");
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using value_type = double;
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#if 1
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typename Type::const_type X;
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#else
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Type X;
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#endif
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DotSingle(const Type& arg_x) : X(arg_x) {}
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KOKKOS_INLINE_FUNCTION
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void operator()(int i, value_type& update) const {
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const typename Type::value_type& x = X[i];
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update += x * x;
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}
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KOKKOS_INLINE_FUNCTION
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static void join(volatile value_type& update,
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const volatile value_type& source) {
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update += source;
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}
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KOKKOS_INLINE_FUNCTION
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static void init(value_type& update) { update = 0; }
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};
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template <class ScalarType, class VectorType>
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struct Scale {
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using execution_space = typename VectorType::execution_space;
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static_assert(static_cast<unsigned>(ScalarType::Rank) ==
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static_cast<unsigned>(0),
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"Scale static_assert Fail: ScalarType::Rank != 0");
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static_assert(static_cast<unsigned>(VectorType::Rank) ==
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static_cast<unsigned>(1),
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"Scale static_assert Fail: VectorType::Rank != 1");
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#if 1
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typename ScalarType::const_type alpha;
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#else
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ScalarType alpha;
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#endif
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VectorType Y;
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Scale(const ScalarType& arg_alpha, const VectorType& arg_Y)
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: alpha(arg_alpha), Y(arg_Y) {}
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KOKKOS_INLINE_FUNCTION
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void operator()(int i) const { Y[i] *= alpha(); }
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};
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template <class ScalarType, class ConstVectorType, class VectorType>
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struct AXPBY {
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using execution_space = typename VectorType::execution_space;
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static_assert(static_cast<unsigned>(ScalarType::Rank) ==
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static_cast<unsigned>(0),
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"AXPBY static_assert Fail: ScalarType::Rank != 0");
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static_assert(static_cast<unsigned>(ConstVectorType::Rank) ==
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static_cast<unsigned>(1),
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"AXPBY static_assert Fail: ConstVectorType::Rank != 1");
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static_assert(static_cast<unsigned>(VectorType::Rank) ==
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static_cast<unsigned>(1),
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"AXPBY static_assert Fail: VectorType::Rank != 1");
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#if 1
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typename ScalarType::const_type alpha, beta;
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typename ConstVectorType::const_type X;
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#else
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ScalarType alpha, beta;
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ConstVectorType X;
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#endif
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VectorType Y;
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AXPBY(const ScalarType& arg_alpha, const ConstVectorType& arg_X,
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const ScalarType& arg_beta, const VectorType& arg_Y)
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: alpha(arg_alpha), beta(arg_beta), X(arg_X), Y(arg_Y) {}
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KOKKOS_INLINE_FUNCTION
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void operator()(int i) const { Y[i] = alpha() * X[i] + beta() * Y[i]; }
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};
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} /* namespace Kokkos */
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//----------------------------------------------------------------------------
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//----------------------------------------------------------------------------
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namespace Kokkos {
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/** \brief Y = alpha * X + beta * Y */
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template <class ConstScalarType, class ConstVectorType, class VectorType>
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void axpby(const ConstScalarType& alpha, const ConstVectorType& X,
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const ConstScalarType& beta, const VectorType& Y) {
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using functor = AXPBY<ConstScalarType, ConstVectorType, VectorType>;
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parallel_for(Y.extent(0), functor(alpha, X, beta, Y));
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}
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/** \brief Y *= alpha */
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template <class ConstScalarType, class VectorType>
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void scale(const ConstScalarType& alpha, const VectorType& Y) {
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using functor = Scale<ConstScalarType, VectorType>;
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parallel_for(Y.extent(0), functor(alpha, Y));
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}
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template <class ConstVectorType, class Finalize>
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void dot(const ConstVectorType& X, const ConstVectorType& Y,
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const Finalize& finalize) {
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using functor = Dot<ConstVectorType>;
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parallel_reduce(X.extent(0), functor(X, Y), finalize);
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}
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template <class ConstVectorType, class Finalize>
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void dot(const ConstVectorType& X, const Finalize& finalize) {
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using functor = DotSingle<ConstVectorType>;
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parallel_reduce(X.extent(0), functor(X), finalize);
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}
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} /* namespace Kokkos */
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#endif /* #ifndef KOKKOS_BLAS_KERNELS_HPP */
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