/*! \file */
/* ************************************************************************
 * Copyright (c) 2020-2021 Advanced Micro Devices, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * 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 copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 * ************************************************************************ */

#include "gebsrmm_device_general.h"
#include "utility.h"

template <rocsparse_int BSR_BLOCK_DIM, rocsparse_int BLK_SIZE_Y, typename T, typename U>
__launch_bounds__(BSR_BLOCK_DIM* BLK_SIZE_Y) ROCSPARSE_KERNEL
    void gebsrmm_general_blockdim_kernel(rocsparse_direction direction,
                                         rocsparse_operation trans_B,
                                         rocsparse_int       mb,
                                         rocsparse_int       n,
                                         U                   alpha_device_host,
                                         const rocsparse_int* __restrict__ bsr_row_ptr,
                                         const rocsparse_int* __restrict__ bsr_col_ind,
                                         const T* __restrict__ bsr_val,
                                         rocsparse_int row_block_dim,
                                         rocsparse_int col_block_dim,
                                         const T* __restrict__ B,
                                         rocsparse_int ldb,
                                         U             beta_device_host,
                                         T* __restrict__ C,
                                         rocsparse_int        ldc,
                                         rocsparse_index_base idx_base)
{
    auto alpha = load_scalar_device_host(alpha_device_host);
    auto beta  = load_scalar_device_host(beta_device_host);

    if(alpha == static_cast<T>(0) && beta == static_cast<T>(1))
    {
        return;
    }

    gebsrmm_general_blockdim_device<BSR_BLOCK_DIM, BLK_SIZE_Y>(direction,
                                                               trans_B,
                                                               mb,
                                                               n,
                                                               alpha,
                                                               bsr_row_ptr,
                                                               bsr_col_ind,
                                                               bsr_val,
                                                               row_block_dim,
                                                               col_block_dim,
                                                               B,
                                                               ldb,
                                                               beta,
                                                               C,
                                                               ldc,
                                                               idx_base);
}

template <typename T, typename U>
rocsparse_status rocsparse_gebsrmm_template_general(rocsparse_handle          handle,
                                                    rocsparse_direction       dir,
                                                    rocsparse_operation       trans_A,
                                                    rocsparse_operation       trans_B,
                                                    rocsparse_int             mb,
                                                    rocsparse_int             n,
                                                    rocsparse_int             kb,
                                                    rocsparse_int             nnzb,
                                                    U                         alpha,
                                                    const rocsparse_mat_descr descr,
                                                    const T*                  bsr_val,
                                                    const rocsparse_int*      bsr_row_ptr,
                                                    const rocsparse_int*      bsr_col_ind,
                                                    rocsparse_int             row_block_dim,
                                                    rocsparse_int             col_block_dim,
                                                    const T*                  B,
                                                    rocsparse_int             ldb,
                                                    U                         beta,
                                                    T*                        C,
                                                    rocsparse_int             ldc)
{
    hipStream_t stream = handle->stream;

    dim3 gebsrmm_blocks((mb - 1) / 1 + 1, (n - 1) / 32 + 1);
    dim3 gebsrmm_threads(32, 32, 1);
    hipLaunchKernelGGL((gebsrmm_general_blockdim_kernel<32, 32>),
                       gebsrmm_blocks,
                       gebsrmm_threads,
                       0,
                       stream,
                       dir,
                       trans_B,
                       mb,
                       n,
                       alpha,
                       bsr_row_ptr,
                       bsr_col_ind,
                       bsr_val,
                       row_block_dim,
                       col_block_dim,
                       B,
                       ldb,
                       beta,
                       C,
                       ldc,
                       descr->base);

    return rocsparse_status_success;
}

#define INSTANTIATE(real_type_, scalar_type_)                                                        \
    template rocsparse_status rocsparse_gebsrmm_template_general(rocsparse_handle          handle,   \
                                                                 rocsparse_direction       dir,      \
                                                                 rocsparse_operation       trans_A,  \
                                                                 rocsparse_operation       trans_B,  \
                                                                 rocsparse_int             mb,       \
                                                                 rocsparse_int             n,        \
                                                                 rocsparse_int             kb,       \
                                                                 rocsparse_int             nnzb,     \
                                                                 scalar_type_              alpha,    \
                                                                 const rocsparse_mat_descr descr,    \
                                                                 const real_type_*         bsr_val,  \
                                                                 const rocsparse_int* bsr_row_ptr,   \
                                                                 const rocsparse_int* bsr_col_ind,   \
                                                                 rocsparse_int        row_block_dim, \
                                                                 rocsparse_int        col_block_dim, \
                                                                 const real_type_*    B,             \
                                                                 rocsparse_int        ldb,           \
                                                                 scalar_type_         beta,          \
                                                                 real_type_*          C,             \
                                                                 rocsparse_int        ldc)

INSTANTIATE(float, float);
INSTANTIATE(float, const float*);

INSTANTIATE(double, double);
INSTANTIATE(double, const double*);

INSTANTIATE(rocsparse_float_complex, rocsparse_float_complex);
INSTANTIATE(rocsparse_float_complex, const rocsparse_float_complex*);

INSTANTIATE(rocsparse_double_complex, rocsparse_double_complex);
INSTANTIATE(rocsparse_double_complex, const rocsparse_double_complex*);

#undef INSTANTIATE