/* ************************************************************************
 * Copyright 2016-2021 Advanced Micro Devices, Inc.
 *
 * ************************************************************************ */

#include <stdio.h>
#include <stdlib.h>
#include <vector>

#include "testing_common.hpp"

using namespace std;

/* ============================================================================================ */

template <typename T>
hipblasStatus_t testing_rotm(const Arguments& arg)
{
    bool FORTRAN       = arg.fortran;
    auto hipblasRotmFn = FORTRAN ? hipblasRotm<T, true> : hipblasRotm<T, false>;

    int N    = arg.N;
    int incx = arg.incx;
    int incy = arg.incy;

    const T rel_error = std::numeric_limits<T>::epsilon() * 1000;

    hipblasLocalHandle handle(arg);

    // check to prevent undefined memory allocation error
    if(N <= 0)
    {
        CHECK_HIPBLAS_ERROR(hipblasRotmFn(handle, N, nullptr, incx, nullptr, incy, nullptr));
        return HIPBLAS_STATUS_SUCCESS;
    }

    double gpu_time_used, hipblas_error_host, hipblas_error_device;

    int    abs_incx = incx >= 0 ? incx : -incx;
    int    abs_incy = incy >= 0 ? incy : -incy;
    size_t size_x   = N * size_t(abs_incx);
    size_t size_y   = N * size_t(abs_incy);
    if(!size_x)
        size_x = 1;
    if(!size_y)
        size_y = 1;

    device_vector<T> dx(size_x);
    device_vector<T> dy(size_y);
    device_vector<T> dparam(5);

    // Initial Data on CPU
    host_vector<T> hx(size_x);
    host_vector<T> hy(size_y);
    host_vector<T> hdata(4);
    host_vector<T> hparam(5);
    srand(1);
    hipblas_init<T>(hx, 1, N, abs_incx);
    hipblas_init<T>(hy, 1, N, abs_incy);
    hipblas_init<T>(hdata, 1, 4, 1);

    // CPU BLAS reference data
    cblas_rotmg<T>(&hdata[0], &hdata[1], &hdata[2], &hdata[3], hparam);
    const int FLAG_COUNT        = 4;
    const T   FLAGS[FLAG_COUNT] = {-1, 0, 1, -2};
    for(int i = 0; i < FLAG_COUNT; ++i)
    {
        if(arg.unit_check || arg.norm_check)
        {
            hparam[0]         = FLAGS[i];
            host_vector<T> cx = hx;
            host_vector<T> cy = hy;
            cblas_rotm<T>(N, cx, incx, cy, incy, hparam);

            // Test host
            {
                CHECK_HIPBLAS_ERROR(hipblasSetPointerMode(handle, HIPBLAS_POINTER_MODE_HOST));
                CHECK_HIP_ERROR(hipMemcpy(dx, hx, sizeof(T) * size_x, hipMemcpyHostToDevice));
                CHECK_HIP_ERROR(hipMemcpy(dy, hy, sizeof(T) * size_y, hipMemcpyHostToDevice));
                CHECK_HIPBLAS_ERROR(hipblasRotmFn(handle, N, dx, incx, dy, incy, hparam));
                host_vector<T> rx(size_x);
                host_vector<T> ry(size_y);
                CHECK_HIP_ERROR(hipMemcpy(rx, dx, sizeof(T) * size_x, hipMemcpyDeviceToHost));
                CHECK_HIP_ERROR(hipMemcpy(ry, dy, sizeof(T) * size_y, hipMemcpyDeviceToHost));
                if(arg.unit_check)
                {
                    near_check_general(1, N, abs_incx, cx.data(), rx.data(), rel_error);
                    near_check_general(1, N, abs_incy, cy.data(), ry.data(), rel_error);
                }
                if(arg.norm_check)
                {
                    hipblas_error_host = norm_check_general<T>('F', 1, N, abs_incx, cx, rx);
                    hipblas_error_host += norm_check_general<T>('F', 1, N, abs_incy, cy, ry);
                }
            }

            // Test device
            {
                CHECK_HIPBLAS_ERROR(hipblasSetPointerMode(handle, HIPBLAS_POINTER_MODE_DEVICE));
                CHECK_HIP_ERROR(hipMemcpy(dx, hx, sizeof(T) * size_x, hipMemcpyHostToDevice));
                CHECK_HIP_ERROR(hipMemcpy(dy, hy, sizeof(T) * size_y, hipMemcpyHostToDevice));
                CHECK_HIP_ERROR(hipMemcpy(dparam, hparam, sizeof(T) * 5, hipMemcpyHostToDevice));
                CHECK_HIPBLAS_ERROR(hipblasRotmFn(handle, N, dx, incx, dy, incy, dparam));
                host_vector<T> rx(size_x);
                host_vector<T> ry(size_y);
                CHECK_HIP_ERROR(hipMemcpy(rx, dx, sizeof(T) * size_x, hipMemcpyDeviceToHost));
                CHECK_HIP_ERROR(hipMemcpy(ry, dy, sizeof(T) * size_y, hipMemcpyDeviceToHost));
                if(arg.unit_check)
                {
                    near_check_general(1, N, abs_incx, cx.data(), rx.data(), rel_error);
                    near_check_general(1, N, abs_incy, cy.data(), ry.data(), rel_error);
                }
                if(arg.norm_check)
                {
                    hipblas_error_device = norm_check_general<T>('F', 1, N, abs_incx, cx, rx);
                    hipblas_error_device += norm_check_general<T>('F', 1, N, abs_incy, cy, ry);
                }
            }
        }
    }

    if(arg.timing)
    {
        hparam[0] = 0;
        hipStream_t stream;
        CHECK_HIPBLAS_ERROR(hipblasGetStream(handle, &stream));
        CHECK_HIPBLAS_ERROR(hipblasSetPointerMode(handle, HIPBLAS_POINTER_MODE_DEVICE));
        CHECK_HIP_ERROR(hipMemcpy(dx, hx, sizeof(T) * size_x, hipMemcpyHostToDevice));
        CHECK_HIP_ERROR(hipMemcpy(dy, hy, sizeof(T) * size_y, hipMemcpyHostToDevice));
        CHECK_HIP_ERROR(hipMemcpy(dparam, hparam, sizeof(T) * 5, hipMemcpyHostToDevice));

        int runs = arg.cold_iters + arg.iters;
        for(int iter = 0; iter < runs; iter++)
        {
            if(iter == arg.cold_iters)
                gpu_time_used = get_time_us_sync(stream);

            CHECK_HIPBLAS_ERROR(hipblasRotmFn(handle, N, dx, incx, dy, incy, dparam));
        }
        gpu_time_used = get_time_us_sync(stream) - gpu_time_used;

        ArgumentModel<e_N, e_incx, e_incy>{}.log_args<T>(std::cout,
                                                         arg,
                                                         gpu_time_used,
                                                         rotm_gflop_count<T>(N, hparam[0]),
                                                         rotm_gbyte_count<T>(N, hparam[0]),
                                                         hipblas_error_host,
                                                         hipblas_error_device);
    }

    return HIPBLAS_STATUS_SUCCESS;
}