#include "megdnn/oprs.h"

#include "src/common/utils.h"

namespace megdnn {

void ROIPoolingBase::check_layout_fwd(
        const TensorLayout& src, const TensorLayout& rois, const TensorLayout& dst,
        const TensorLayout& index) {
    // all should be contiguous
    megdnn_assert_contiguous(src);
    megdnn_assert_contiguous(rois);
    megdnn_assert_contiguous(dst);
    megdnn_assert_contiguous(index);
    auto errmsg = [&]() {
        return megdnn_layout_msg(src) + ", " + megdnn_layout_msg(rois) + ", " +
               megdnn_layout_msg(dst) + ", " + megdnn_layout_msg(index);
    };
    MEGDNN_MARK_USED_VAR(errmsg);
    // src
    megdnn_assert(src.ndim == 4_z, "%s", errmsg().c_str());
    auto C = src.shape[1];
    // rois
    megdnn_assert(rois.ndim == 2_z, "%s", errmsg().c_str());
    auto M = rois.shape[0];
    megdnn_assert(rois[1] == 5_z, "%s", errmsg().c_str());
    // dst
    megdnn_assert(dst[0] == M, "%s", errmsg().c_str());
    megdnn_assert(dst[1] == C, "%s", errmsg().c_str());
    // index
    megdnn_assert_eq_shape(index, dst);

    megdnn_assert(src.dtype.category() == DTypeCategory::FLOAT);
    megdnn_assert(rois.dtype.category() == DTypeCategory::FLOAT);
    megdnn_assert(dst.dtype.category() == DTypeCategory::FLOAT);
    megdnn_assert(index.dtype == dtype::Int32());
}

void ROIPoolingForward::check_exec(
        const TensorLayout& src, const TensorLayout& rois, const TensorLayout& dst,
        const TensorLayout& index, size_t workspace_in_bytes) {
    check_layout_fwd(src, rois, dst, index);
    auto required_workspace_in_bytes = get_workspace_in_bytes(src, rois, dst, index);
    megdnn_assert(workspace_in_bytes >= required_workspace_in_bytes);
}

void ROIPoolingBackward::check_exec(
        const TensorLayout& diff, const TensorLayout& src, const TensorLayout& rois,
        const TensorLayout& index, const TensorLayout& grad,
        size_t workspace_in_bytes) {
    check_layout_fwd(src, rois, diff, index);
    megdnn_assert_eq_layout(src, grad);
    auto required_workspace_in_bytes =
            get_workspace_in_bytes(diff, src, rois, index, grad);
    megdnn_assert(workspace_in_bytes >= required_workspace_in_bytes);
}

}  // namespace megdnn

// vim: syntax=cpp.doxygen