/* ************************************************************************
 * Copyright 2016-2021 Advanced Micro Devices, Inc.
 * ************************************************************************ */
#include "rocblas_axpy.hpp"
#include "logging.hpp"

namespace
{

    template <typename>
    constexpr char rocblas_axpy_name[] = "unknown";
    template <>
    constexpr char rocblas_axpy_name<float>[] = "rocblas_saxpy";
    template <>
    constexpr char rocblas_axpy_name<double>[] = "rocblas_daxpy";
    template <>
    constexpr char rocblas_axpy_name<rocblas_half>[] = "rocblas_haxpy";
    template <>
    constexpr char rocblas_axpy_name<rocblas_float_complex>[] = "rocblas_caxpy";
    template <>
    constexpr char rocblas_axpy_name<rocblas_double_complex>[] = "rocblas_zaxpy";

    template <int NB, typename T>
    rocblas_status rocblas_axpy_impl(rocblas_handle handle,
                                     rocblas_int    n,
                                     const T*       alpha,
                                     const T*       x,
                                     rocblas_int    incx,
                                     T*             y,
                                     rocblas_int    incy,
                                     const char*    name,
                                     const char*    bench_name)
    {
        if(!handle)
            return rocblas_status_invalid_handle;

        RETURN_ZERO_DEVICE_MEMORY_SIZE_IF_QUERIED(handle);

        auto layer_mode     = handle->layer_mode;
        auto check_numerics = handle->check_numerics;
        if(layer_mode & rocblas_layer_mode_log_trace)
            log_trace(handle, name, n, LOG_TRACE_SCALAR_VALUE(handle, alpha), x, incx, y, incy);

        if(layer_mode & rocblas_layer_mode_log_bench)
            log_bench(handle,
                      "./rocblas-bench",
                      "-f",
                      bench_name,
                      "-r",
                      rocblas_precision_string<T>,
                      "-n",
                      n,
                      LOG_BENCH_SCALAR_VALUE(handle, alpha),
                      "--incx",
                      incx,
                      "--incy",
                      incy);

        if(layer_mode & rocblas_layer_mode_log_profile)
            log_profile(handle, name, "N", n, "incx", incx, "incy", incy);

        if(n <= 0) // Quick return if possible. Not Argument error
            return rocblas_status_success;

        if(!alpha)
            return rocblas_status_invalid_pointer;

        if(handle->pointer_mode == rocblas_pointer_mode_host)
        {
            if(*alpha == 0)
                return rocblas_status_success;
        }

        if(!x || !y)
            return rocblas_status_invalid_pointer;

        static constexpr rocblas_int    batch_count_1 = 1;
        static constexpr rocblas_stride stride_0      = 0;
        static constexpr ptrdiff_t      offset_0      = 0;

        if(check_numerics)
        {
            bool           is_input = true;
            rocblas_status axpy_check_numerics_status
                = rocblas_axpy_check_numerics(rocblas_axpy_name<T>,
                                              handle,
                                              n,
                                              x,
                                              offset_0,
                                              incx,
                                              stride_0,
                                              y,
                                              offset_0,
                                              incy,
                                              stride_0,
                                              batch_count_1,
                                              check_numerics,
                                              is_input);
            if(axpy_check_numerics_status != rocblas_status_success)
                return axpy_check_numerics_status;
        }

        rocblas_status status = rocblas_internal_axpy_template<NB, T>(handle,
                                                                      n,
                                                                      alpha,
                                                                      stride_0,
                                                                      x,
                                                                      offset_0,
                                                                      incx,
                                                                      stride_0,
                                                                      y,
                                                                      offset_0,
                                                                      incy,
                                                                      stride_0,
                                                                      batch_count_1);
        if(status != rocblas_status_success)
            return status;

        if(check_numerics)
        {
            bool           is_input = false;
            rocblas_status axpy_check_numerics_status
                = rocblas_axpy_check_numerics(rocblas_axpy_name<T>,
                                              handle,
                                              n,
                                              x,
                                              offset_0,
                                              incx,
                                              stride_0,
                                              y,
                                              offset_0,
                                              incy,
                                              stride_0,
                                              batch_count_1,
                                              check_numerics,
                                              is_input);
            if(axpy_check_numerics_status != rocblas_status_success)
                return axpy_check_numerics_status;
        }
        return status;
    }

}

/*
 * ===========================================================================
 *    C wrapper
 * ===========================================================================
 */

extern "C" {

#ifdef IMPL
#error IMPL ALREADY DEFINED
#endif

#define IMPL(routine_name_, T_)                                                                    \
    rocblas_status routine_name_(rocblas_handle handle,                                            \
                                 rocblas_int    n,                                                 \
                                 const T_*      alpha,                                             \
                                 const T_*      x,                                                 \
                                 rocblas_int    incx,                                              \
                                 T_*            y,                                                 \
                                 rocblas_int    incy)                                              \
    try                                                                                            \
    {                                                                                              \
        return rocblas_axpy_impl<256>(handle, n, alpha, x, incx, y, incy, #routine_name_, "axpy"); \
    }                                                                                              \
    catch(...)                                                                                     \
    {                                                                                              \
        return exception_to_rocblas_status();                                                      \
    }

IMPL(rocblas_saxpy, float);
IMPL(rocblas_daxpy, double);
IMPL(rocblas_caxpy, rocblas_float_complex);
IMPL(rocblas_zaxpy, rocblas_double_complex);
IMPL(rocblas_haxpy, rocblas_half);

#undef IMPL

} // extern "C"