/**
 * Copyright (c) 2026 Huawei Technologies Co., Ltd.
 * This program is free software, you can redistribute it and/or modify it under the terms and conditions of
 * CANN Open Software License Agreement Version 2.0 (the "License").
 * Please refer to the License for details. You may not use this file except in compliance with the License.
 * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED,
 * INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY, OR FITNESS FOR A PARTICULAR PURPOSE.
 * See LICENSE in the root of the software repository for the full text of the License.
 */
/*!
 * \file xdivy_tiling_struct.h
 * \brief Xdivy TilingData — 模板化的 host→device 传递结构
 */
#pragma once
#include <cstdint>

// === 算子特定常量 — 新算子必须修改 ===
constexpr int64_t kMaxInputSlots = 2;  // 本算子输入数 (x1, x2)
constexpr int64_t kMaxOutputSlots = 1; // 本算子输出数 (y)

struct SplitResult {
    int64_t axis;
    int64_t a_i;
    int64_t a_o;
    int64_t a_i_tail;
};

struct MultiCoreResult {
    int64_t num_cores;
    int64_t total_tiles;
    int64_t tiles_main;
    int64_t cores_tail;
};

template <int64_t kRank>
struct XdivyTilingData {
    SplitResult split;
    MultiCoreResult multicore;
    int64_t rank;
    int64_t per_buf_bytes;
    int64_t max_bro_shape[kRank];
    int64_t num_inputs;
    int64_t num_outputs;
    int64_t input_shapes[kMaxInputSlots][kRank];
    int64_t input_strides[kMaxInputSlots][kRank];
    int64_t output_shapes[kMaxOutputSlots][kRank];
    int64_t output_strides[kMaxOutputSlots][kRank];
};

// 空 Tensor 分支的 tiling data。内容用不上（无元素可搬），但必须存在：
// opc 依赖 kernel 里的 GET_TILING_DATA_WITH_STRUCT 反推每个模板实例的 tiling
// 结构体大小，空分支若完全不引用任何结构体会导致 tiling_struct_size 未定义。
struct XdivyEmptyTilingData {
    int64_t numel; // 恒为 0，仅作占位与调试
};