/*

* Simd Library (http://ermig1979.github.io/Simd).

*

* Copyright (c) 2011-2026 Yermalayeu Ihar.

*

* Permission is hereby granted, free of charge, to any person obtaining a copy

* of this software and associated documentation files (the "Software"), to deal

* in the Software without restriction, including without limitation the rights

* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

* copies of the Software, and to permit persons to whom the Software is

* furnished to do so, subject to the following conditions:

*

* The above copyright notice and this permission notice shall be included in

* all copies or substantial portions of the Software.

*

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE

* SOFTWARE.

*/

#ifndef __SimdSynetPermute_h__

#define __SimdSynetPermute_h__

#include "Simd/SimdMath.h"

#include "Simd/SimdMemory.h"

#include "Simd/SimdArray.h"

#include <vector>

namespace Simd

{

    namespace Base

    {

        typedef std::vector<size_t> Shape;

        struct PermuteParam

        {

            static const size_t CountMax = 5;

            Shape shape, order;

            size_t count, align;

            SimdTensorDataType type;

            SIMD_INLINE PermuteParam(const size_t* s, const size_t* o, size_t c, SimdTensorDataType t, size_t a)

                : shape(s, s + Simd::Min(c, CountMax))

                , order(o, o + Simd::Min(c, CountMax))

                , count(c)

                , type(t) 

                , align(a)

            {

            }

            SIMD_INLINE bool Valid() const

            {

                if (count < 2 || count > CountMax)

                    return false;

                int permute = 0;

                for (size_t i = 0; i < count; ++i)

                {

                    if (order[i] >= count || shape[i] == 0)

                        return false;

                    if (order[i] != i && shape[order[i]] != 1)

                        permute++;

                }

                return permute > 1;

            }

            SIMD_INLINE size_t PixelSize() const

            {

                switch (type)

                {

                case SimdTensorDataUnknown: return 0;

                case SimdTensorData32f: return 4;

                case SimdTensorData32i: return 4;

                case SimdTensorData8i: return 1;

                case SimdTensorData8u: return 1;

                case SimdTensorData16b: return 2;

                case SimdTensorData16f: return 2;

                default: assert(0); return 0;

                }

            }

        };

        //-------------------------------------------------------------------------------------------------

        class SynetPermute : public Deletable

        {

        public:

            SynetPermute(const PermuteParam & param);

            size_t InternalBufferSize() const

            {

                return _index.RawSize();

            }

            void Forward(const uint8_t* src, uint8_t* dst);

            typedef void (*PermutePtr)(const uint8_t* src, const Shape& shape, const Shape& stride, uint8_t* dst);

        protected:

            PermuteParam _param;

            Array32i _index;

            size_t _batch, _stride, _count;

            Shape _srcShape, _srcOrder, _srcStride;

            Shape _dstShape, _dstOrder, _dstStride;

            PermutePtr _permute;

        };

        //-------------------------------------------------------------------------------------------------

        void * SynetPermuteInit(const size_t* shape, const size_t* order, size_t count, SimdTensorDataType type);

    }

#ifdef SIMD_SSE41_ENABLE    

    namespace Sse41

    {

        class SynetPermute : public Base::SynetPermute

        {

        public:

            SynetPermute(const Base::PermuteParam& param);

        };

        //-------------------------------------------------------------------------------------------------

        void* SynetPermuteInit(const size_t* shape, const size_t* order, size_t count, SimdTensorDataType type);

    }

#endif

#ifdef SIMD_AVX2_ENABLE    

    namespace Avx2

    {

        class SynetPermute : public Sse41::SynetPermute

        {

        public:

            SynetPermute(const Base::PermuteParam& param);

        };

        //-------------------------------------------------------------------------------------------------

        void* SynetPermuteInit(const size_t* shape, const size_t* order, size_t count, SimdTensorDataType type);

    }

#endif

#ifdef SIMD_AVX512BW_ENABLE

    namespace Avx512bw

    {

        class SynetPermute : public Avx2::SynetPermute

        {

        public:

            SynetPermute(const Base::PermuteParam& param);

        };

        //-------------------------------------------------------------------------------------------------

        void* SynetPermuteInit(const size_t* shape, const size_t* order, size_t count, SimdTensorDataType type);

    }

#endif

#ifdef SIMD_NEON_ENABLE    

    namespace Neon

    {

        class SynetPermute : public Base::SynetPermute

        {

        public:

            SynetPermute(const Base::PermuteParam& param);

        };

        //-------------------------------------------------------------------------------------------------

        void* SynetPermuteInit(const size_t* shape, const size_t* order, size_t count, SimdTensorDataType type);

    }

#endif

#ifdef SIMD_SVE2_ENABLE

    namespace Sve2

    {

        class SynetPermute :

#ifdef SIMD_NEON_ENABLE

            public Neon::SynetPermute

#else

            public Base::SynetPermute

#endif

        {

        public:

            SynetPermute(const Base::PermuteParam& param);

        };

        //-------------------------------------------------------------------------------------------------

        void* SynetPermuteInit(const size_t* shape, const size_t* order, size_t count, SimdTensorDataType type);

    }

#endif

}

#endif