ElementwiseOperations.h

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/*
 * Copyright (c) The Shogun Machine Learning Toolbox
 * Written (w) 2015 Soumyajit De
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#ifndef ELEMENTWISE_OPERATIONS_H_
#define ELEMENTWISE_OPERATIONS_H_

#include <shogun/mathematics/linalg/internal/implementation/operations/Sin.h>
#include <shogun/mathematics/linalg/internal/implementation/operations/opencl_operation.h>
#include <shogun/mathematics/linalg/internal/implementation/util/AllocResultUtil.h>
#include <shogun/mathematics/linalg/internal/implementation/ElementwiseUnaryOperation.h>

namespace shogun
{

namespace linalg
{

template <class Operand, class UnaryOp>
auto elementwise_compute(Operand operand, UnaryOp unary_op)
-> typename Operand::template container_type<decltype(unary_op(operand.data()[0]))>
{
    typedef decltype(unary_op(operand.data()[0])) ST;
    typedef typename Operand::template container_type<ST> ReturnType;

    ReturnType result=util::allocate_result<Operand,ReturnType>::alloc(operand);

    implementation::elementwise_unary_operation<Backend::NATIVE, Operand,
        ReturnType, UnaryOp>::compute(operand, result, unary_op);

    return result;
}

template <class Operand, class UnaryOp>
void elementwise_compute_inplace(Operand operand, UnaryOp unary_op)
{
    typedef typename Operand::Scalar T;
    typedef decltype(unary_op(operand.data()[0])) ST;
    static_assert(std::is_same<T,ST>::value, "Scalar type mismatch!\n");

    implementation::elementwise_unary_operation<Backend::NATIVE, Operand,
        Operand, UnaryOp>::compute(operand, operand, unary_op);
}

#ifdef HAVE_VIENNACL

template <class Operand>
Operand elementwise_compute(Operand operand, std::string unary_op)
{
    Operand result=util::allocate_result<Operand,Operand>::alloc(operand);
    operations::ocl_operation operation(unary_op);

    implementation::elementwise_unary_operation<Backend::VIENNACL, Operand,
        Operand, operations::ocl_operation>::compute(operand, result, operation);

    return result;
}

template <class Operand>
void elementwise_compute_inplace(Operand operand, std::string unary_op)
{
    operations::ocl_operation operation(unary_op);
    implementation::elementwise_unary_operation<Backend::VIENNACL, Operand,
        Operand, operations::ocl_operation>::compute(operand, operand, operation);
}
#endif // HAVE_VIENNACL

template <Backend backend, class Operand>
typename Operand::template container_type<typename operations::sin<typename Operand::Scalar>::return_type>
elementwise_sin(Operand operand)
{
    typedef typename Operand::Scalar T;
    typedef typename operations::sin<T>::return_type ST;
    typedef typename Operand::template container_type<ST> ReturnType;

    ReturnType result=util::allocate_result<Operand,ReturnType>::alloc(operand);

    operations::sin<T> operation;
    implementation::elementwise_unary_operation<backend, Operand,
        ReturnType, operations::sin<T>>::compute(operand, result, operation);

    return result;
}

template <Backend backend, class Operand>
void elementwise_sin_inplace(Operand operand)
{
    typedef typename Operand::Scalar T;
    typedef typename operations::sin<T>::return_type ST;
    static_assert(std::is_same<T,ST>::value, "Scalar type mismatch!\n");

    operations::sin<T> operation;
    implementation::elementwise_unary_operation<backend, Operand,
        Operand, operations::sin<T>>::compute(operand, operand, operation);
}

}

}
#endif // ELEMENTWISE_OPERATIONS_H_