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sorts.cu
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sorts.cu
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/*
* 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.
*/
#include "strings.h"
template <typename KeyType>
void update_permutation(thrust::device_vector<KeyType>& key, unsigned int* permutation, unsigned long long int RecCount, string SortType, KeyType* tmp, unsigned int bits)
{
thrust::device_ptr<unsigned int> dev_per(permutation);
// permute the keys with the current reordering
if (phase_copy) {
if(bits == 8) {
thrust::device_ptr<unsigned char> src((unsigned char*)thrust::raw_pointer_cast(key.data()));
thrust::device_ptr<unsigned char> temp((unsigned char*)tmp);
thrust::gather(dev_per, dev_per+RecCount, src, temp);
if (SortType.compare("DESC") == 0 )
thrust::stable_sort_by_key(temp, temp+RecCount, dev_per, thrust::greater<unsigned char>());
else
thrust::stable_sort_by_key(temp, temp+RecCount, dev_per);
}
else if(bits == 16) {
thrust::device_ptr<unsigned short int> src((unsigned short int*)thrust::raw_pointer_cast(key.data()));
thrust::device_ptr<unsigned short int> temp((unsigned short int*)tmp);
thrust::gather(dev_per, dev_per+RecCount, src, temp);
if (SortType.compare("DESC") == 0 )
thrust::stable_sort_by_key(temp, temp+RecCount, dev_per, thrust::greater<unsigned short int>());
else
thrust::stable_sort_by_key(temp, temp+RecCount, dev_per);
}
else if(bits == 32) {
thrust::device_ptr<unsigned int> src((unsigned int*)thrust::raw_pointer_cast(key.data()));
thrust::device_ptr<unsigned int> temp((unsigned int*)tmp);
thrust::gather(dev_per, dev_per+RecCount, src, temp);
if (SortType.compare("DESC") == 0 )
thrust::stable_sort_by_key(temp, temp+RecCount, dev_per, thrust::greater<unsigned int>());
else
thrust::stable_sort_by_key(temp, temp+RecCount, dev_per);
}
else {
thrust::device_ptr<KeyType> temp(tmp);
thrust::gather(dev_per, dev_per+RecCount, key.begin(), temp);
if (SortType.compare("DESC") == 0 )
thrust::stable_sort_by_key(temp, temp+RecCount, dev_per, thrust::greater<KeyType>());
else
thrust::stable_sort_by_key(temp, temp+RecCount, dev_per);
}
}
else {
thrust::device_ptr<KeyType> temp(tmp);
thrust::gather(dev_per, dev_per+RecCount, key.begin(), temp);
if (SortType.compare("DESC") == 0 )
thrust::stable_sort_by_key(temp, temp+RecCount, dev_per, thrust::greater<KeyType>());
else
thrust::stable_sort_by_key(temp, temp+RecCount, dev_per);
};
}
template <typename KeyType>
void update_permutation_host(KeyType* key, unsigned int* permutation, unsigned long long int RecCount, string SortType, KeyType* tmp)
{
thrust::gather(permutation, permutation+RecCount, key, tmp);
if (SortType.compare("DESC") == 0 )
thrust::stable_sort_by_key(tmp, tmp+RecCount, permutation, thrust::greater<KeyType>());
else
thrust::stable_sort_by_key(tmp, tmp+RecCount, permutation);
}
template <typename KeyType>
void apply_permutation(thrust::device_vector<KeyType>& key, unsigned int* permutation, unsigned long long int RecCount, KeyType* tmp, unsigned int bits)
{
thrust::device_ptr<unsigned int> dev_per(permutation);
if (phase_copy) {
if(bits == 8) {
thrust::device_ptr<unsigned char> temp((unsigned char*)tmp);
thrust::device_ptr<unsigned char> src((unsigned char*)thrust::raw_pointer_cast(key.data()));
thrust::copy(src, src + RecCount, temp);
thrust::gather(dev_per, dev_per+RecCount, temp, src);
}
else if(bits == 16) {
thrust::device_ptr<unsigned short int> temp((unsigned short int*)tmp);
thrust::device_ptr<unsigned short int> src((unsigned short int*)thrust::raw_pointer_cast(key.data()));
thrust::copy(src, src + RecCount, temp);
thrust::gather(dev_per, dev_per+RecCount, temp, src);
}
else if(bits == 32) {
thrust::device_ptr<unsigned int> temp((unsigned int*)tmp);
thrust::device_ptr<unsigned int> src((unsigned int*)thrust::raw_pointer_cast(key.data()));
thrust::copy(src, src + RecCount, temp);
thrust::gather(dev_per, dev_per+RecCount, temp, src);
}
else {
thrust::device_ptr<KeyType> temp(tmp);
// copy keys to temporary vector
thrust::copy(key.begin(), key.begin() + RecCount, temp);
// permute the keys
thrust::gather(dev_per, dev_per+RecCount, temp, key.begin());
};
}
else {
thrust::device_ptr<KeyType> temp(tmp);
thrust::copy(key.begin(), key.begin() + RecCount, temp);
thrust::gather(dev_per, dev_per+RecCount, temp, key.begin());
};
}
template <typename KeyType>
void apply_permutation_host(KeyType* key, unsigned int* permutation, unsigned long long int RecCount, KeyType* res)
{
thrust::gather(permutation, permutation + RecCount, key, res);
}