megenginelite-sys 1.8.2

A safe megenginelite wrapper in Rust
Documentation 
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/**
 * \file dnn/src/fallback/conv_bias/im2col/algos.cpp
 * MegEngine is Licensed under the Apache License, Version 2.0 (the "License")
 *
 * Copyright (c) 2014-2021 Megvii Inc. All rights reserved.
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT ARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 */

#include "src/fallback/conv_bias/im2col/strategy_base.h"
#include "src/fallback/convolution/img2col_helper.h"

namespace megdnn {

template <
        typename src_ctype, typename bias_ctype, typename dst_ctype, typename op_ctype,
        typename op_dtype, megdnn::PostprocessMode postprocess_mode>
void Strategy<
        src_ctype, bias_ctype, dst_ctype, op_ctype, op_dtype, postprocess_mode,
        PackMode::ONLY_PACKA>::
        packA_kern(
                const WorkspaceBundle& bundle,
                const fallback::ConvBiasImpl::NCBKernParam& param,
                fallback::MatrixMulImpl::KernSizeParam matmulparam,
                const fallback::MatrixMulImpl::AlgoBase* matmul_algo,
                const fallback::ConvBiasImpl::NCBKernIndex& ncb_index,
                const fallback::MatrixMulImpl::AlgoBase::
                        MatmulDescription& /*matmul_desc*/,
                const StrategyParam& sparam) {
    fallback::MatrixMulImpl::KernParam matmul_param;
    static_cast<fallback::MatrixMulImpl::KernSizeParam&>(matmul_param) = matmulparam;
    size_t OC = param.filter_meta.ocpg;
    size_t oc_tile_size = matmul_param.M;
    size_t group_id = ncb_index.ndrange_id[0];
    size_t output_block_oc_size =
            std::min(oc_tile_size, OC - ncb_index.ndrange_id[1] * oc_tile_size);
    size_t oc_cur_index = ncb_index.ndrange_id[1] * oc_tile_size;
    size_t a_panel_offset =
            ncb_index.ndrange_id[1] * matmul_algo->get_bundle(matmul_param).get_size(0);

    int8_t* tmp_ptr = sparam.enable_filter_preprocess
                            ? static_cast<int8_t*>(
                                      param.preprocessed_filter->tensors[0].raw_ptr())
                            : static_cast<int8_t*>(bundle.get(BUNDLE_PACKA_INDEX));

    int8_t* a_panel = tmp_ptr + group_id * sparam.packA_group_size + a_panel_offset;
    matmul_param.A_ptr = const_cast<src_ctype*>(param.filter<src_ctype>(group_id)) +
                         oc_cur_index * matmul_param.K;
    matmul_param.M = output_block_oc_size;
    matmul_algo->pack_A(matmul_param, a_panel, 0_z, 0_z);
}

template <
        typename src_ctype, typename bias_ctype, typename dst_ctype, typename op_ctype,
        typename op_dtype, megdnn::PostprocessMode postprocess_mode>
void Strategy<
        src_ctype, bias_ctype, dst_ctype, op_ctype, op_dtype, postprocess_mode,
        PackMode::ONLY_PACKA>::
        exec_matmul(
                const fallback::ConvBiasImpl::NCBKernParam& param,
                const StrategyParam& sparam, const WorkspaceBundle& bundle,
                const WorkspaceBundle& bundle_thread,
                fallback::MatrixMulImpl::KernParam matmul_param,
                const fallback::MatrixMulImpl::AlgoBase* matmul_algo,
                const fallback::ConvBiasImpl::NCBKernIndex& ncb_index,
                const fallback::MatrixMulImpl::AlgoBase::MatmulDescription&
                /*matmul_desc*/) {
    size_t a_panel_offset =
            ncb_index.ndrange_id[3] * matmul_algo->get_bundle(matmul_param).get_size(0);
    a_panel_offset = sparam.group_id * sparam.packA_group_size + a_panel_offset;

    void* matmul_dst = get_matmul_dst_ptr(param, bundle_thread, sparam);

    int8_t* tmp_ptr = sparam.enable_filter_preprocess
                            ? static_cast<int8_t*>(
                                      param.preprocessed_filter->tensors[0].raw_ptr())
                            : static_cast<int8_t*>(bundle.get(BUNDLE_PACKA_INDEX));

    src_ctype* a_panel = reinterpret_cast<src_ctype*>(tmp_ptr + a_panel_offset);
    src_ctype* b_panel = nullptr;

    src_ctype* im2col_dst =
            static_cast<src_ctype*>(bundle_thread.get(THREAD_BUNDLE_IM2COL_INDEX));

    matmul_param.M = sparam.output_block_oc_size;
    matmul_param.N = sparam.output_block_size;
    matmul_param.LDB = sparam.output_block_size;
    matmul_param.LDC = sparam.output_block_size;
    matmul_param.B_ptr = im2col_dst;
    matmul_param.C_ptr = matmul_dst;

    auto matmul_kern = matmul_algo->get_kern_naked(matmul_param);
    matmul_kern(matmul_param, a_panel, b_panel);
}

template <
        typename src_ctype, typename bias_ctype, typename dst_ctype, typename op_ctype,
        typename op_dtype, megdnn::PostprocessMode postprocess_mode>
void Strategy<
        src_ctype, bias_ctype, dst_ctype, op_ctype, op_dtype, postprocess_mode,
        PackMode::ONLY_PACKA>::
        exec_im2col(
                const WorkspaceBundle& bundle, const WorkspaceBundle& bundle_thread,
                const StrategyParam& sparam,
                const fallback::ConvBiasImpl::NCBKernParam& param,
                fallback::MatrixMulImpl::KernParam matmul_param,
                const fallback::MatrixMulImpl::AlgoBase* matmul_algo) {
    MEGDNN_MARK_USED_VAR(matmul_param);
    MEGDNN_MARK_USED_VAR(matmul_algo);
    size_t sh = param.filter_meta.stride[0];
    size_t sw = param.filter_meta.stride[1];
    size_t oc = param.filter_meta.ocpg;
    size_t oh = param.osz[0];
    size_t ow = param.osz[1];
    size_t ic = param.filter_meta.icpg;
    size_t ih = param.isz[0] + param.filter_meta.padding[0] * 2;
    size_t iw = param.isz[1] + param.filter_meta.padding[1] * 2;
    size_t fh = param.filter_meta.spatial[0];
    size_t fw = param.filter_meta.spatial[1];
    size_t is_xcorr = !param.filter_meta.should_flip;

    size_t input_offset =
            ih * iw * ic *
            (sparam.group_id + param.filter_meta.group * sparam.batch_id) *
            sizeof(src_ctype);

    src_ctype* src2 = reinterpret_cast<src_ctype*>(
            reinterpret_cast<uintptr_t>(bundle.get(BUNDLE_PADDING_INDEX)) +
            input_offset);
    bool is_phpwzero =
            param.filter_meta.padding[0] == 0 && param.filter_meta.padding[1] == 0;
    if (is_phpwzero) {
        src2 = const_cast<src_ctype*>(
                param.src<src_ctype>(sparam.batch_id, sparam.group_id));
    }
    src_ctype* im2col_dst =
            static_cast<src_ctype*>(bundle_thread.get(THREAD_BUNDLE_IM2COL_INDEX));
    if (sh == 1 && sw == 1) {
        if (is_xcorr) {
            img2col<true>(
                    src2, im2col_dst, oc, oh, ow, ic, ih, iw, fh, fw,
                    sparam.ohw_cur_index, sparam.output_block_size);
        } else {
            img2col<false>(
                    src2, im2col_dst, oc, oh, ow, ic, ih, iw, fh, fw,
                    sparam.ohw_cur_index, sparam.output_block_size);
        }
    } else {
        if (is_xcorr) {
            img2col_stride<true>(
                    src2, im2col_dst, oc, oh, ow, ic, ih, iw, fh, fw, sh, sw,
                    sparam.ohw_cur_index, sparam.output_block_size);
        } else {
            img2col_stride<false>(
                    src2, im2col_dst, oc, oh, ow, ic, ih, iw, fh, fw, sh, sw,
                    sparam.ohw_cur_index, sparam.output_block_size);
        }
    }
}

template <
        typename src_ctype, typename bias_ctype, typename dst_ctype, typename op_ctype,
        typename op_dtype, megdnn::PostprocessMode postprocess_mode>
void* Strategy<
        src_ctype, bias_ctype, dst_ctype, op_ctype, op_dtype, postprocess_mode,
        PackMode::ONLY_PACKA>::
        get_matmul_dst_ptr(
                const fallback::ConvBiasImpl::NCBKernParam& param,
                const WorkspaceBundle& bundle_thread, const StrategyParam& sparam) {
    if (sparam.is_dst_8bit || !sparam.is_ohw_size_bigger) {
        return static_cast<bias_ctype*>(
                bundle_thread.get(THREAD_BUNDLE_MATMULDST_INDEX));
    } else {
        bias_ctype* dst = param.dst<bias_ctype>(sparam.batch_id, sparam.group_id) +
                          sparam.oc_cur_index * sparam.ohw;
        return static_cast<void*>(dst);
    }
}

#define INSTANTIAL_CLASS(                                                             \
        _src_ctype, _bias_ctype, _dst_ctype, _op_ctype, _op_dtype, _postprocess_mode) \
    template class Strategy<                                                          \
            _src_ctype, _bias_ctype, _dst_ctype, _op_ctype, _op_dtype,                \
            _postprocess_mode, PackMode::ONLY_PACKA>;

INSTANTIAL_CLASS(
        dt_float32, dt_float32, dt_float32, dt_float32, dt_float32,
        megdnn::PostprocessMode::FLOAT)

#undef INSTANTIAL_CLASS
}  // namespace megdnn

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