// MIT License
//
// Copyright (c) 2017-2025 Advanced Micro Devices, Inc. All rights reserved.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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#include "../common_test_header.hpp"

#include "../../common/utils_device_ptr.hpp"

template<class T>
__device__
T ax(const T a, const T x)
{
    return x * a;
}

template<class T>
__global__
void saxpy_kernel(const T* x, T* y, const T a, const size_t size)
{
    const unsigned int i = blockIdx.x * blockDim.x + threadIdx.x;
    if(i < size)
    {
        y[i] += ax(a, x[i]);
    }
}

TEST(HIPTests, Saxpy)
{
    int device_id = test_common_utils::obtain_device_from_ctest();
    SCOPED_TRACE(testing::Message() << "with device_id =" << device_id);
    HIP_CHECK(hipSetDevice(device_id));

    const size_t N = 100;

    const float        a = 100.0f;
    std::vector<float> x(N, 2.0f);
    std::vector<float> y(N, 1.0f);

    common::device_ptr<float> d_x(x);
    common::device_ptr<float> d_y(y);

    hipLaunchKernelGGL(HIP_KERNEL_NAME(saxpy_kernel<float>),
                       dim3((N + 255) / 256),
                       dim3(256),
                       0,
                       0,
                       d_x.get(),
                       d_y.get(),
                       a,
                       N);
    HIP_CHECK(hipGetLastError());

    y = d_y.load();

    for(size_t i = 0; i < N; i++)
    {
        ASSERT_NEAR(y[i], 201.0f, 0.1f);
    }
}