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/*
* Copyright 2008-2013 NVIDIA Corporation
* Modifications Copyright© 2019 Advanced Micro Devices, Inc. All rights reserved.
*
* 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 <thrust/extrema.h>
#include <thrust/iterator/retag.h>
#include "test_header.hpp"
TESTS_DEFINE(MaxElementTests, FullTestsParams);
TESTS_DEFINE(MaxElementPrimitiveTests, NumericalTestsParams);
TYPED_TEST(MaxElementTests, TestMaxElementSimple)
{
using Vector = typename TestFixture::input_type;
using Policy = typename TestFixture::execution_policy;
using T = typename Vector::value_type;
SCOPED_TRACE(testing::Message() << "with device_id= " << test::set_device_from_ctest());
Vector data(6);
data[0] = 3;
data[1] = 5;
data[2] = 1;
data[3] = 2;
data[4] = 5;
data[5] = 1;
ASSERT_EQ(*thrust::max_element(Policy{}, data.begin(), data.end()), 5);
ASSERT_EQ(thrust::max_element(Policy{}, data.begin(), data.end()) - data.begin(), 1);
ASSERT_EQ(*thrust::max_element(Policy{}, data.begin(), data.end(), thrust::greater<T>()), 1);
ASSERT_EQ(thrust::max_element(Policy{}, data.begin(), data.end(), thrust::greater<T>()) - data.begin(),
2);
}
TYPED_TEST(MaxElementTests, TestMaxElementWithTransform)
{
using Vector = typename TestFixture::input_type;
using Policy = typename TestFixture::execution_policy;
using T = typename Vector::value_type;
SCOPED_TRACE(testing::Message() << "with device_id= " << test::set_device_from_ctest());
// We cannot use unsigned types for this test case
if(std::is_unsigned<T>::value)
return;
Vector data(6);
data[0] = 3;
data[1] = 5;
data[2] = 1;
data[3] = 2;
data[4] = 5;
data[5] = 1;
ASSERT_EQ(
*thrust::max_element(Policy{},
thrust::make_transform_iterator(data.begin(), thrust::negate<T>()),
thrust::make_transform_iterator(data.end(), thrust::negate<T>())),
-1);
ASSERT_EQ(
*thrust::max_element(Policy{},
thrust::make_transform_iterator(data.begin(), thrust::negate<T>()),
thrust::make_transform_iterator(data.end(), thrust::negate<T>()),
thrust::greater<T>()),
-5);
}
TYPED_TEST(MaxElementPrimitiveTests, TestMaxElement)
{
using T = typename TestFixture::input_type;
SCOPED_TRACE(testing::Message() << "with device_id= " << test::set_device_from_ctest());
for(auto size : get_sizes())
{
SCOPED_TRACE(testing::Message() << "with size= " << size);
for(auto seed : get_seeds())
{
SCOPED_TRACE(testing::Message() << "with seed= " << seed);
thrust::host_vector<T> h_data = get_random_data<T>(
size, std::numeric_limits<T>::min(), std::numeric_limits<T>::max(), seed);
thrust::device_vector<T> d_data = h_data;
typename thrust::host_vector<T>::iterator h_max
= thrust::max_element(h_data.begin(), h_data.end());
typename thrust::device_vector<T>::iterator d_max
= thrust::max_element(d_data.begin(), d_data.end());
ASSERT_EQ(h_max - h_data.begin(), d_max - d_data.begin());
typename thrust::host_vector<T>::iterator h_min
= thrust::max_element(h_data.begin(), h_data.end(), thrust::less<T>());
typename thrust::device_vector<T>::iterator d_min
= thrust::max_element(d_data.begin(), d_data.end(), thrust::less<T>());
ASSERT_EQ(h_min - h_data.begin(), d_min - d_data.begin());
}
}
}
template <typename ForwardIterator>
ForwardIterator max_element(my_system& system, ForwardIterator first, ForwardIterator)
{
system.validate_dispatch();
return first;
}
TEST(MaxElementTests, TestMaxElementDispatchExplicit)
{
SCOPED_TRACE(testing::Message() << "with device_id= " << test::set_device_from_ctest());
thrust::device_vector<int> vec(1);
my_system sys(0);
thrust::max_element(sys, vec.begin(), vec.end());
ASSERT_EQ(true, sys.is_valid());
}
template <typename ForwardIterator>
ForwardIterator max_element(my_tag, ForwardIterator first, ForwardIterator)
{
*first = 13;
return first;
}
TEST(MaxElementTests, TestMaxElementDispatchImplicit)
{
SCOPED_TRACE(testing::Message() << "with device_id= " << test::set_device_from_ctest());
thrust::device_vector<int> vec(1);
thrust::max_element(thrust::retag<my_tag>(vec.begin()), thrust::retag<my_tag>(vec.end()));
ASSERT_EQ(13, vec.front());
}
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