You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
125 lines
4.5 KiB
125 lines
4.5 KiB
11 years ago
|
/*
|
||
|
|
* Copyright 2008-2012 NVIDIA Corporation
|
||
|
|
*
|
||
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
* you may not use this file except in compliance with the License.
|
||
|
|
* You may obtain a copy of the License at
|
||
|
|
*
|
||
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
*
|
||
|
|
* Unless required by applicable law or agreed to in writing, software
|
||
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
* See the License for the specific language governing permissions and
|
||
|
|
* limitations under the License.
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
#pragma once
|
||
|
|
|
||
|
|
#include <thrust/detail/config.h>
|
||
|
|
#include <thrust/system/detail/generic/transform_scan.h>
|
||
|
|
#include <thrust/scan.h>
|
||
|
|
#include <thrust/iterator/transform_iterator.h>
|
||
|
|
#include <thrust/detail/type_traits.h>
|
||
|
|
#include <thrust/detail/type_traits/function_traits.h>
|
||
|
|
#include <thrust/detail/type_traits/iterator/is_output_iterator.h>
|
||
|
|
|
||
|
|
namespace thrust
|
||
|
|
{
|
||
|
|
namespace system
|
||
|
|
{
|
||
|
|
namespace detail
|
||
|
|
{
|
||
|
|
namespace generic
|
||
|
|
{
|
||
|
|
|
||
|
|
template<typename ExecutionPolicy,
|
||
|
|
typename InputIterator,
|
||
|
|
typename OutputIterator,
|
||
|
|
typename UnaryFunction,
|
||
|
|
typename BinaryFunction>
|
||
|
|
OutputIterator transform_inclusive_scan(thrust::execution_policy<ExecutionPolicy> &exec,
|
||
|
|
InputIterator first,
|
||
|
|
InputIterator last,
|
||
|
|
OutputIterator result,
|
||
|
|
UnaryFunction unary_op,
|
||
|
|
BinaryFunction binary_op)
|
||
|
|
{
|
||
|
|
// the pseudocode for deducing the type of the temporary used below:
|
||
|
|
//
|
||
|
|
// if UnaryFunction is AdaptableUnaryFunction
|
||
|
|
// TemporaryType = AdaptableUnaryFunction::result_type
|
||
|
|
// else if OutputIterator is a "pure" output iterator
|
||
|
|
// TemporaryType = InputIterator::value_type
|
||
|
|
// else
|
||
|
|
// TemporaryType = OutputIterator::value_type
|
||
|
|
//
|
||
|
|
// XXX upon c++0x, TemporaryType needs to be:
|
||
|
|
// result_of<UnaryFunction>::type
|
||
|
|
|
||
|
|
typedef typename thrust::detail::eval_if<
|
||
|
|
thrust::detail::has_result_type<UnaryFunction>::value,
|
||
|
|
thrust::detail::result_type<UnaryFunction>,
|
||
|
|
thrust::detail::eval_if<
|
||
|
|
thrust::detail::is_output_iterator<OutputIterator>::value,
|
||
|
|
thrust::iterator_value<InputIterator>,
|
||
|
|
thrust::iterator_value<OutputIterator>
|
||
|
|
>
|
||
|
|
>::type ValueType;
|
||
|
|
|
||
|
|
thrust::transform_iterator<UnaryFunction, InputIterator, ValueType> _first(first, unary_op);
|
||
|
|
thrust::transform_iterator<UnaryFunction, InputIterator, ValueType> _last(last, unary_op);
|
||
|
|
|
||
|
|
return thrust::inclusive_scan(exec, _first, _last, result, binary_op);
|
||
|
|
} // end transform_inclusive_scan()
|
||
|
|
|
||
|
|
template<typename ExecutionPolicy,
|
||
|
|
typename InputIterator,
|
||
|
|
typename OutputIterator,
|
||
|
|
typename UnaryFunction,
|
||
|
|
typename T,
|
||
|
|
typename AssociativeOperator>
|
||
|
|
OutputIterator transform_exclusive_scan(thrust::execution_policy<ExecutionPolicy> &exec,
|
||
|
|
InputIterator first,
|
||
|
|
InputIterator last,
|
||
|
|
OutputIterator result,
|
||
|
|
UnaryFunction unary_op,
|
||
|
|
T init,
|
||
|
|
AssociativeOperator binary_op)
|
||
|
|
{
|
||
|
|
// the pseudocode for deducing the type of the temporary used below:
|
||
|
|
//
|
||
|
|
// if UnaryFunction is AdaptableUnaryFunction
|
||
|
|
// TemporaryType = AdaptableUnaryFunction::result_type
|
||
|
|
// else if OutputIterator is a "pure" output iterator
|
||
|
|
// TemporaryType = InputIterator::value_type
|
||
|
|
// else
|
||
|
|
// TemporaryType = OutputIterator::value_type
|
||
|
|
//
|
||
|
|
// XXX upon c++0x, TemporaryType needs to be:
|
||
|
|
// result_of<UnaryFunction>::type
|
||
|
|
|
||
|
|
typedef typename thrust::detail::eval_if<
|
||
|
|
thrust::detail::has_result_type<UnaryFunction>::value,
|
||
|
|
thrust::detail::result_type<UnaryFunction>,
|
||
|
|
thrust::detail::eval_if<
|
||
|
|
thrust::detail::is_output_iterator<OutputIterator>::value,
|
||
|
|
thrust::iterator_value<InputIterator>,
|
||
|
|
thrust::iterator_value<OutputIterator>
|
||
|
|
>
|
||
|
|
>::type ValueType;
|
||
|
|
|
||
|
|
thrust::transform_iterator<UnaryFunction, InputIterator, ValueType> _first(first, unary_op);
|
||
|
|
thrust::transform_iterator<UnaryFunction, InputIterator, ValueType> _last(last, unary_op);
|
||
|
|
|
||
|
|
return thrust::exclusive_scan(exec, _first, _last, result, init, binary_op);
|
||
|
|
} // end transform_exclusive_scan()
|
||
|
|
|
||
|
|
} // end namespace generic
|
||
|
|
} // end namespace detail
|
||
|
|
} // end namespace system
|
||
|
|
} // end namespace thrust
|
||
|
|
|
||
|
|
|