megenginelite-sys 1.8.2

A safe megenginelite wrapper in Rust
Documentation 
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/**
 * \file dnn/src/cuda/argsort/opr_impl.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 "./opr_impl.h"
#include "./argsort.cuh"
#include "./backward.cuh"

#include "src/common/utils.h"
#include "src/cuda/utils.h"

using namespace megdnn;
using namespace cuda;

void ArgsortForwardImpl::exec(
        _megdnn_tensor_in src, _megdnn_tensor_out dst, _megdnn_tensor_out indices,
        _megdnn_workspace workspace) {
    check_exec(src.layout, dst.layout, indices.layout, workspace.size);
    auto M = src.layout.shape[0], N = src.layout.shape[1];
    auto iptr = indices.ptr<dt_int32>();
    auto wptr = static_cast<void*>(workspace.raw_ptr);
    bool is_ascending = (param().order == Order::ASCENDING);
    auto stream = cuda_stream(this->handle());
    switch (src.layout.dtype.enumv()) {
#define cb(t)                                                                        \
    case DTypeTrait<t>::enumv:                                                       \
        argsort::forward(                                                            \
                src.ptr<t>(), dst.ptr<t>(), iptr, wptr, M, N, is_ascending, stream); \
        break;
        ARGSORT_FOREACH_CTYPE(cb);
#undef cb
        default:
            megdnn_throw(ssprintf(
                    "unsupported argsort dtype on cuda: %s", src.layout.dtype.name()));
    }
}

size_t ArgsortForwardImpl::get_workspace_in_bytes(
        const TensorLayout& src, const TensorLayout&, const TensorLayout&) {
    megdnn_assert(src.ndim == 2, "invalid src layout: %s", src.to_string().c_str());
    auto M = src.shape[0], N = src.shape[1];
    auto&& dtype = src.dtype;
    megdnn_assert(
            std::max(M, N) <= static_cast<size_t>(std::numeric_limits<int>::max()));
    return argsort::get_fwd_workspace_in_bytes(
            M, N, dtype, param().order == Param::Order::ASCENDING);
}

void ArgsortBackwardImpl::exec(
        _megdnn_tensor_in diff, _megdnn_tensor_in indices, _megdnn_tensor_out grad,
        _megdnn_workspace workspace) {
    check_exec(diff.layout, indices.layout, grad.layout, workspace.size);
    auto stream = cuda_stream(this->handle());
    switch (diff.layout.dtype.enumv()) {
#define cb(t)                                                                  \
    case DTypeTrait<t>::enumv:                                                 \
        argsort::backward_proxy(                                               \
                grad.layout[0], grad.layout[1], diff.layout[1], grad.ptr<t>(), \
                diff.ptr<t>(), indices.ptr<int>(), stream);                    \
        break;
        ARGSORT_FOREACH_CTYPE(cb);
#undef cb
        default:
            megdnn_throw(ssprintf(
                    "unsupported argsort dtype on cuda: %s", diff.layout.dtype.name()));
    }
}

// vim: syntax=cpp.doxygen