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215 lines
8.7 KiB
215 lines
8.7 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/transform.h>
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#include <thrust/for_each.h>
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#include <thrust/iterator/iterator_traits.h>
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#include <thrust/iterator/detail/minimum_system.h>
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#include <thrust/tuple.h>
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#include <thrust/iterator/zip_iterator.h>
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#include <thrust/detail/internal_functional.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,
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typename InputIterator,
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typename OutputIterator,
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typename UnaryFunction>
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OutputIterator transform(thrust::execution_policy<DerivedPolicy> &exec,
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InputIterator first,
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InputIterator last,
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OutputIterator result,
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UnaryFunction op)
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{
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// XXX WAR the problem of a generic __host__ __device__ functor's inability to invoke
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// a function which is only __host__ or __device__ by selecting a generic functor
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// which is one or the other
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// when nvcc is able to deal with this, remove this WAR
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// given the minimal system, determine the unary transform functor we need
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typedef typename thrust::detail::unary_transform_functor<DerivedPolicy,UnaryFunction>::type UnaryTransformFunctor;
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// make an iterator tuple
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typedef thrust::tuple<InputIterator,OutputIterator> IteratorTuple;
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typedef thrust::zip_iterator<IteratorTuple> ZipIterator;
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ZipIterator zipped_result =
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thrust::for_each(exec,
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thrust::make_zip_iterator(thrust::make_tuple(first,result)),
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thrust::make_zip_iterator(thrust::make_tuple(last,result)),
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UnaryTransformFunctor(op));
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return thrust::get<1>(zipped_result.get_iterator_tuple());
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} // end transform()
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template<typename DerivedPolicy,
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typename InputIterator1,
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typename InputIterator2,
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typename OutputIterator,
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typename BinaryFunction>
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OutputIterator transform(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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OutputIterator result,
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BinaryFunction op)
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{
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// XXX WAR the problem of a generic __host__ __device__ functor's inability to invoke
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// a function which is only __host__ or __device__ by selecting a generic functor
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// which is one or the other
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// when nvcc is able to deal with this, remove this WAR
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// given the minimal system, determine the binary transform functor we need
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typedef typename thrust::detail::binary_transform_functor<DerivedPolicy,BinaryFunction>::type BinaryTransformFunctor;
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// make an iterator tuple
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typedef thrust::tuple<InputIterator1,InputIterator2,OutputIterator> IteratorTuple;
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typedef thrust::zip_iterator<IteratorTuple> ZipIterator;
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ZipIterator zipped_result =
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thrust::for_each(exec,
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thrust::make_zip_iterator(thrust::make_tuple(first1,first2,result)),
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thrust::make_zip_iterator(thrust::make_tuple(last1,first2,result)),
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BinaryTransformFunctor(op));
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return thrust::get<2>(zipped_result.get_iterator_tuple());
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} // end transform()
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template<typename DerivedPolicy,
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typename InputIterator,
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typename ForwardIterator,
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typename UnaryFunction,
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typename Predicate>
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ForwardIterator transform_if(thrust::execution_policy<DerivedPolicy> &exec,
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InputIterator first,
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InputIterator last,
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ForwardIterator result,
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UnaryFunction unary_op,
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Predicate pred)
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{
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// XXX WAR the problem of a generic __host__ __device__ functor's inability to invoke
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// a function which is only __host__ or __device__ by selecting a generic functor
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// which is one or the other
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// when nvcc is able to deal with this, remove this WAR
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// given the minimal system, determine the unary transform_if functor we need
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typedef typename thrust::detail::unary_transform_if_functor<DerivedPolicy,UnaryFunction,Predicate>::type UnaryTransformIfFunctor;
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// make an iterator tuple
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typedef thrust::tuple<InputIterator,ForwardIterator> IteratorTuple;
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typedef thrust::zip_iterator<IteratorTuple> ZipIterator;
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ZipIterator zipped_result =
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thrust::for_each(exec,
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thrust::make_zip_iterator(thrust::make_tuple(first,result)),
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thrust::make_zip_iterator(thrust::make_tuple(last,result)),
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UnaryTransformIfFunctor(unary_op,pred));
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return thrust::get<1>(zipped_result.get_iterator_tuple());
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} // end transform_if()
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template<typename DerivedPolicy,
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typename InputIterator1,
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typename InputIterator2,
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typename ForwardIterator,
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typename UnaryFunction,
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typename Predicate>
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ForwardIterator transform_if(thrust::execution_policy<DerivedPolicy> &exec,
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InputIterator1 first,
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InputIterator1 last,
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InputIterator2 stencil,
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ForwardIterator result,
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UnaryFunction unary_op,
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Predicate pred)
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{
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// XXX WAR the problem of a generic __host__ __device__ functor's inability to invoke
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// a function which is only __host__ or __device__ by selecting a generic functor
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// which is one or the other
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// when nvcc is able to deal with this, remove this WAR
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// given the minimal system, determine the unary transform_if functor we need
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typedef typename thrust::detail::unary_transform_if_with_stencil_functor<DerivedPolicy,UnaryFunction,Predicate>::type UnaryTransformIfFunctor;
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// make an iterator tuple
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typedef thrust::tuple<InputIterator1,InputIterator2,ForwardIterator> IteratorTuple;
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typedef thrust::zip_iterator<IteratorTuple> ZipIterator;
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ZipIterator zipped_result =
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thrust::for_each(exec,
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thrust::make_zip_iterator(thrust::make_tuple(first,stencil,result)),
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thrust::make_zip_iterator(thrust::make_tuple(last,stencil,result)),
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UnaryTransformIfFunctor(unary_op,pred));
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return thrust::get<2>(zipped_result.get_iterator_tuple());
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} // end transform_if()
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template<typename DerivedPolicy,
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typename InputIterator1,
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typename InputIterator2,
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typename InputIterator3,
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typename ForwardIterator,
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typename BinaryFunction,
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typename Predicate>
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ForwardIterator transform_if(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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InputIterator3 stencil,
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ForwardIterator result,
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BinaryFunction binary_op,
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Predicate pred)
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{
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// XXX WAR the problem of a generic __host__ __device__ functor's inability to invoke
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// a function which is only __host__ or __device__ by selecting a generic functor
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// which is one or the other
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// when nvcc is able to deal with this, remove this WAR
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// given the minimal system, determine the binary transform_if functor we need
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typedef typename thrust::detail::binary_transform_if_functor<DerivedPolicy,BinaryFunction,Predicate>::type BinaryTransformIfFunctor;
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// make an iterator tuple
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typedef thrust::tuple<InputIterator1,InputIterator2,InputIterator3,ForwardIterator> IteratorTuple;
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typedef thrust::zip_iterator<IteratorTuple> ZipIterator;
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ZipIterator zipped_result =
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thrust::for_each(exec,
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thrust::make_zip_iterator(thrust::make_tuple(first1,first2,stencil,result)),
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thrust::make_zip_iterator(thrust::make_tuple(last1,first2,stencil,result)),
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BinaryTransformIfFunctor(binary_op,pred));
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return thrust::get<3>(zipped_result.get_iterator_tuple());
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} // end transform_if()
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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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