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

#include "logging.hpp"
#include "rocblas_axpy.hpp"

namespace
{

    template <typename>
    constexpr char rocblas_axpy_batched_name[] = "unknown";
    template <>
    constexpr char rocblas_axpy_batched_name<float>[] = "rocblas_saxpy_batched";
    template <>
    constexpr char rocblas_axpy_batched_name<double>[] = "rocblas_daxpy_batched";
    template <>
    constexpr char rocblas_axpy_batched_name<rocblas_half>[] = "rocblas_haxpy_batched";
    template <>
    constexpr char rocblas_axpy_batched_name<rocblas_float_complex>[] = "rocblas_caxpy_batched";
    template <>
    constexpr char rocblas_axpy_batched_name<rocblas_double_complex>[] = "rocblas_zaxpy_batched";

    template <int NB, typename T>
    rocblas_status rocblas_axpy_batched_impl(rocblas_handle  handle,
                                             rocblas_int     n,
                                             const T*        alpha,
                                             const T* const* x,
                                             rocblas_int     incx,
                                             T* const*       y,
                                             rocblas_int     incy,
                                             rocblas_int     batch_count,
                                             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,
                      batch_count);

        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,
                      "--batch",
                      batch_count);

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

        if(n <= 0 || batch_count <= 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_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_batched_name<T>,
                                              handle,
                                              n,
                                              x,
                                              offset_0,
                                              incx,
                                              stride_0,
                                              y,
                                              offset_0,
                                              incy,
                                              stride_0,
                                              batch_count,
                                              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);
        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_batched_name<T>,
                                              handle,
                                              n,
                                              x,
                                              offset_0,
                                              incx,
                                              stride_0,
                                              y,
                                              offset_0,
                                              incy,
                                              stride_0,
                                              batch_count,
                                              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_* const x[],                                         \
                                 rocblas_int     incx,                                        \
                                 T_* const       y[],                                         \
                                 rocblas_int     incy,                                        \
                                 rocblas_int     batch_count)                                 \
    try                                                                                       \
    {                                                                                         \
        return rocblas_axpy_batched_impl<256>(                                                \
            handle, n, alpha, x, incx, y, incy, batch_count, #routine_name_, "axpy_batched"); \
    }                                                                                         \
    catch(...)                                                                                \
    {                                                                                         \
        return exception_to_rocblas_status();                                                 \
    }

IMPL(rocblas_saxpy_batched, float);
IMPL(rocblas_daxpy_batched, double);
IMPL(rocblas_caxpy_batched, rocblas_float_complex);
IMPL(rocblas_zaxpy_batched, rocblas_double_complex);
IMPL(rocblas_haxpy_batched, rocblas_half);

#undef IMPL

} // extern "C"