/**

* 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 kernel_operator_vec_gather_intf_impl.h

 * \brief

 */

#ifndef ASCENDC_MODULE_OPERATOR_VEC_GATHER_INTERFACE_IMPL_H

#define ASCENDC_MODULE_OPERATOR_VEC_GATHER_INTERFACE_IMPL_H

#include "kernel_tensor.h"

#include "kernel_check.h"

#include "kernel_struct_gather.h"



#if __NPU_ARCH__ == 1001

#include "dav_c100/kernel_operator_vec_gather_impl.h"

#elif __NPU_ARCH__ == 2002

#include "dav_m200/kernel_operator_vec_gather_impl.h"

#elif __NPU_ARCH__ == 2201

#include "dav_c220/kernel_operator_vec_gather_impl.h"

#elif __NPU_ARCH__ == 3002

#include "dav_m300/kernel_operator_vec_gather_impl.h"

#elif __NPU_ARCH__ == 3101

#include "dav_c310/kernel_operator_vec_gather_impl.h"

#elif (__NPU_ARCH__ == 5102)

#include "dav_m510/kernel_operator_vec_gather_impl.h"

#elif __NPU_ARCH__ == 3003

#include "dav_l300/kernel_operator_vec_gather_impl.h"

#elif __NPU_ARCH__ == 3113

#include "dav_l311/kernel_operator_vec_gather_impl.h"

#endif



#pragma begin_pipe(V)

namespace AscendC {

/*

 * @ingroup gatherb Level 0

 * @brief this function fetches N addresses from offset,then accesses these N addresses(plus the src0 address)

 * @brief to get N 32Byte block, and finally writes these N blocks into dst.

 * @brief gather element in the uint of block

 * @param [out] dst output LocalTensor

 * @param [in] src0 input LocalTensor

 * @param [in] offset input LocalTensor

 * @param [in] repeatTime repeat times

 * @param [in] repeatParams.dstBlkStride dst block stride

 * @param [in] repeatParams.dstRepStride dst repeat stride

 */

template <typename T>

__aicore__ inline void Gatherb(const LocalTensor<T>& dst, const LocalTensor<T>& src0,

    const LocalTensor<uint32_t>& offset, const uint8_t repeatTime, const GatherRepeatParams& repeatParams)

{

    using PrimType = PrimT<T>;

#if ASCENDC_CPU_DEBUG

    if (!CheckFuncGatherb(dst, src0, offset, repeatTime, repeatParams, "Gatherb")) {

        ASCENDC_REPORT_CHECK_ERROR("Gatherb", KernelFuncType::NONE_MODE);

    }

#endif

    uint32_t srcLength = src0.GetSize();

#if defined(__NPU_ARCH__) && ((__NPU_ARCH__ == 3003) || \

    (__NPU_ARCH__ == 3113))

    GatherImpl((__ubuf__ PrimType*)dst.GetPhyAddr(), (__ubuf__ PrimType*)src0.GetPhyAddr(),

        (__ubuf__ uint32_t*)offset.GetPhyAddr(), srcLength, repeatTime, repeatParams);

#else

    GatherbImpl((__ubuf__ PrimType*)dst.GetPhyAddr(), (__ubuf__ PrimType*)src0.GetPhyAddr(),

        (__ubuf__ uint32_t*)offset.GetPhyAddr(), srcLength, repeatTime, repeatParams);

#endif

}



/*

 * @ingroup gather Level 0

 * @brief gather element from src according to srcOffset

 * @param [out] dst output LocalTensor

 * @param [in] src input LocalTensor

 * @param [in] srcOffset input LocalTensor

 * @param [in] srcBaseAddr base address of src

 * @param [in] mask valid element count

 * @param [in] repeatTime repeat times

 * @param [in] dstRepStride dst repeat stride

 */

template <typename T>

__aicore__ inline void Gather(const LocalTensor<T>& dst, const LocalTensor<T>& src,

    const LocalTensor<uint32_t>& srcOffset, const uint32_t srcBaseAddr, const uint64_t mask,

    const uint8_t repeatTime, const uint16_t dstRepStride)

{

    using PrimType = PrimT<T>;

#if ASCENDC_CPU_DEBUG

    if (!CheckFuncGather(dst, src, srcOffset, srcBaseAddr, mask, repeatTime, dstRepStride, "Gather")) {

        ASCENDC_REPORT_CHECK_ERROR("Gather", KernelFuncType::MASK_COUNT_MODE);

    }

#endif

    const uint32_t srcLength = src.GetSize();

    GatherImpl((__ubuf__ PrimType *)dst.GetPhyAddr(), (__ubuf__ PrimType *)src.GetPhyAddr(),

        (__ubuf__ uint32_t *)srcOffset.GetPhyAddr(), srcLength, srcBaseAddr, mask, repeatTime, dstRepStride);

}



/*

 * @ingroup gather Level 0

 * @brief gather element from src according to srcOffset

 * @param [out] dst output LocalTensor

 * @param [in] src input LocalTensor

 * @param [in] srcOffset input LocalTensor

 * @param [in] srcBaseAddr base address of src

 * @param [in] mask valid element count(bit mode)

 * @param [in] repeatTime repeat times

 * @param [in] dstRepStride dst repeat stride

 */

template <typename T>

__aicore__ inline void Gather(const LocalTensor<T>& dst, const LocalTensor<T>& src,

    const LocalTensor<uint32_t>& srcOffset, const uint32_t srcBaseAddr, const uint64_t mask[],

    const uint8_t repeatTime, const uint16_t dstRepStride)

{

    using PrimType = PrimT<T>;

#if ASCENDC_CPU_DEBUG

    if (!CheckFuncGather(dst, src, srcOffset, srcBaseAddr, mask, repeatTime, dstRepStride, "Gather")) {

        ASCENDC_REPORT_CHECK_ERROR("Gather", KernelFuncType::MASK_BIT_MODE);

    }

#endif

    const uint32_t srcLength = src.GetSize();

    GatherImpl((__ubuf__ PrimType *)dst.GetPhyAddr(), (__ubuf__ PrimType *)src.GetPhyAddr(),

        (__ubuf__ uint32_t *)srcOffset.GetPhyAddr(), srcLength, srcBaseAddr, mask, repeatTime, dstRepStride);

}



/*

 * @ingroup gather Level 2

 * @brief gather element from src according to srcOffset

 * @param [out] dst output LocalTensor

 * @param [in] src input LocalTensor

 * @param [in] srcOffset input LocalTensor

 * @param [in] srcBaseAddr base address of src

 * @param [in] count element count

 */

template <typename T>

__aicore__ inline void Gather(const LocalTensor<T>& dst, const LocalTensor<T>& src,

    const LocalTensor<uint32_t>& srcOffset, const uint32_t srcBaseAddr, const uint32_t count)

{

    using PrimType = PrimT<T>;

#if defined(__NPU_ARCH__) && ((__NPU_ARCH__ == 3002) || (__NPU_ARCH__ == 3102) ||                       \

      (__NPU_ARCH__ == 3101) || (__NPU_ARCH__ == 5102))

    ASCENDC_ASSERT((SupportType<PrimType, uint8_t, int8_t, half, bfloat16_t, uint16_t, int16_t, float, uint32_t, int32_t>()),

        {KERNEL_LOG(KERNEL_ERROR, "Failed to check dtype in Gather, current api support dtype combination is src and "

        "dst both: uint8 / int8 / half / bfloat16_t / uint16_t / int16_t / float / uint32_t / int32_t");});

    GatherImpl((__ubuf__ PrimType *)dst.GetPhyAddr(), (__ubuf__ PrimType *)src.GetPhyAddr(),

        (__ubuf__ uint32_t *)srcOffset.GetPhyAddr(), srcBaseAddr, count);

#else

#if ASCENDC_CPU_DEBUG

    if (!CheckFuncGather(dst, src, srcOffset, srcBaseAddr, count, "Gather")) {

        ASCENDC_REPORT_CHECK_ERROR("Gather", KernelFuncType::CALCOUNT_MODE);

    }

#endif

    uint32_t vectorRegWidth = 256;

#if (__NPU_ARCH__ == 3003) || \

    ((__NPU_ARCH__ == 3113))

    vectorRegWidth = VECTOR_REG_WIDTH;

#endif

    uint32_t elementCountSingleRepeat;

    if constexpr (sizeof(PrimType) == sizeof(uint16_t)) {

        elementCountSingleRepeat = 128;

    } else {

        elementCountSingleRepeat = 64;

    }

#if defined(__NPU_ARCH__) && (__NPU_ARCH__ == 3003) || \

    (__NPU_ARCH__ == 3113)

    elementCountSingleRepeat = vectorRegWidth / sizeof(T);

    uint32_t repeatStride = vectorRegWidth / ONE_BLK_SIZE;

#endif

    const uint32_t elementCountTail = count % elementCountSingleRepeat;

    const uint8_t repeatTime = count / elementCountSingleRepeat;

#if defined(__NPU_ARCH__) && (__NPU_ARCH__ == 3003) || \

    (__NPU_ARCH__ == 3113)

    if (repeatTime > 0) {

        Gather(dst, src, srcOffset, srcBaseAddr, (uint64_t)elementCountSingleRepeat, repeatTime,

            repeatStride);

    }

    if (elementCountTail > 0) {

        const uint32_t offset = count - elementCountTail;

        Gather(dst[offset], src, srcOffset[offset], srcBaseAddr, (uint64_t)elementCountTail, 1,

            repeatStride);

    }

#else

    if (repeatTime > 0) {

        Gather(dst, src, srcOffset, srcBaseAddr, static_cast<uint64_t>(elementCountSingleRepeat), repeatTime,

            DEFAULT_REPEAT_STRIDE);

    }

    if (elementCountTail > 0) {

        const uint32_t offset = count - elementCountTail;

        Gather(dst[offset], src, srcOffset[offset], srcBaseAddr, static_cast<uint64_t>(elementCountTail), 1,

            DEFAULT_REPEAT_STRIDE);

    }

#endif

#endif

}

} // namespace AscendC

#pragma end_pipe

#endif // ASCENDC_MODULE_OPERATOR_VEC_GATHER_INTERFACE_IMPL_H