/**
 * Copyright (c) 2025 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 erf_tiling.cpp
 * \brief
 */
#include "include/adv_api/math/erf_tiling.h"

#include <cstdint>

#include "graph/tensor.h"
#include "../../detail/host_log.h"
namespace AscendC {
namespace {
constexpr uint32_t ERF_HALF_CALC_PROC = 8;
constexpr uint32_t ERF_FLOAT_CALC_PROC = 3;
constexpr uint32_t ERF_ONE_REPEAT_BYTE_SIZE = 256;

inline uint32_t GetErfMaxTmpSize(const uint32_t inputSize, const uint32_t typeSize)
{
    const uint8_t calcPro = typeSize == sizeof(float) ? ERF_FLOAT_CALC_PROC : ERF_HALF_CALC_PROC;
    return calcPro * std::max(inputSize * typeSize, ERF_ONE_REPEAT_BYTE_SIZE);
}

inline uint32_t GetErfMinTmpSize(const uint32_t typeSize)
{
    return typeSize == sizeof(float) ? ERF_FLOAT_CALC_PROC * ERF_ONE_REPEAT_BYTE_SIZE :
                                       ERF_HALF_CALC_PROC * ERF_ONE_REPEAT_BYTE_SIZE;
}
} // namespace

void GetErfTmpBufferFactorSize(const uint32_t typeSize, uint32_t& maxLiveNodeCount, uint32_t& extraBuffer)
{
    extraBuffer = 0;
    maxLiveNodeCount = (typeSize == sizeof(float)) ? ERF_FLOAT_CALC_PROC : ERF_HALF_CALC_PROC;
}

void GetErfMaxMinTmpSize(
    const ge::Shape& srcShape, const uint32_t typeSize, const bool isReuseSource, uint32_t& maxValue,
    uint32_t& minValue)
{
    (void)isReuseSource;
    const uint32_t inputSize = srcShape.GetShapeSize();
    ASCENDC_HOST_ASSERT(inputSize > 0, return, "Input Shape size must be greater than 0.");

    minValue = GetErfMinTmpSize(typeSize);
    maxValue = GetErfMaxTmpSize(inputSize, typeSize);
}
} // namespace AscendC