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71 lines
2.5 KiB
71 lines
2.5 KiB
11 years ago
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/*
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* Copyright 2008-2012 NVIDIA Corporation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <thrust/detail/config.h>
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#include <thrust/system/detail/generic/inner_product.h>
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#include <thrust/functional.h>
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#include <thrust/detail/internal_functional.h>
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#include <thrust/transform_reduce.h>
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namespace thrust
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{
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namespace system
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{
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namespace detail
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{
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namespace generic
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{
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template<typename DerivedPolicy, typename InputIterator1, typename InputIterator2, typename OutputType>
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OutputType inner_product(thrust::execution_policy<DerivedPolicy> &exec,
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InputIterator1 first1,
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InputIterator1 last1,
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InputIterator2 first2,
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OutputType init)
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{
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thrust::plus<OutputType> binary_op1;
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thrust::multiplies<OutputType> binary_op2;
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return thrust::inner_product(exec, first1, last1, first2, init, binary_op1, binary_op2);
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} // end inner_product()
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template<typename DerivedPolicy, typename InputIterator1, typename InputIterator2, typename OutputType, typename BinaryFunction1, typename BinaryFunction2>
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OutputType inner_product(thrust::execution_policy<DerivedPolicy> &exec,
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InputIterator1 first1,
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InputIterator1 last1,
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InputIterator2 first2,
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OutputType init,
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BinaryFunction1 binary_op1,
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BinaryFunction2 binary_op2)
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{
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typedef thrust::zip_iterator<thrust::tuple<InputIterator1,InputIterator2> > ZipIter;
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ZipIter first = thrust::make_zip_iterator(thrust::make_tuple(first1,first2));
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// only the first iterator in the tuple is relevant for the purposes of last
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ZipIter last = thrust::make_zip_iterator(thrust::make_tuple(last1, first2));
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return thrust::transform_reduce(exec, first, last, thrust::detail::zipped_binary_op<OutputType,BinaryFunction2>(binary_op2), init, binary_op1);
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} // end inner_product()
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} // end generic
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} // end detail
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} // end system
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} // end thrust
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