From 292b427156e3bcc14247524784c6fd211732d6e9 Mon Sep 17 00:00:00 2001
From: Cursor Agent <cursoragent@cursor.com>
Date: Tue, 25 Aug 2026 14:17:04 +0000
Subject: [PATCH] Add C++ wrapper Simd::SynetInnerProduct32f.

Co-authored-by: igor.ermolaev <igor.ermolaev@altezza.org>
---
 docs/2026.html            |   1 +
 prj/txt/DoxygenGroups.txt |   2 +-
 src/Simd/SimdSynet.hpp    | 211 ++++++++++++++++++++++++++++++++++++++
 src/Test/TestCheckCpp.cpp |  37 +++++++
 4 files changed, 250 insertions(+), 1 deletion(-)

diff --git a/docs/2026.html b/docs/2026.html
index b1ff76f45e..e61b5e0af6 100644
--- a/docs/2026.html
+++ b/docs/2026.html
@@ -90,6 +90,7 @@ <h5>New features</h5>
  <li>C++ wrapper Simd::SynetQuantizedMul.</li>
  <li>C++ wrapper Simd::SynetGatherElements.</li>
  <li>C++ wrapper Simd::SynetPermute.</li>
+ <li>C++ wrapper Simd::SynetInnerProduct32f.</li>
 </ul>
 <h5>Improving</h5>
 <ul>
diff --git a/prj/txt/DoxygenGroups.txt b/prj/txt/DoxygenGroups.txt
index 5a34c1300e..62faa3a6c2 100644
--- a/prj/txt/DoxygenGroups.txt
+++ b/prj/txt/DoxygenGroups.txt
@@ -93,7 +93,7 @@
 
 /*! @ingroup cpp_types
     @defgroup cpp_synet Synet Wrappers
-    \short Simd::SynetAdd16b, Simd::SynetQuantizedAdd, Simd::SynetQuantizedMul, Simd::SynetGatherElements and Simd::SynetPermute classes (C++ wrappers of Synet operations).
+    \short Simd::SynetAdd16b, Simd::SynetQuantizedAdd, Simd::SynetQuantizedMul, Simd::SynetGatherElements, Simd::SynetPermute and Simd::SynetInnerProduct32f classes (C++ wrappers of Synet operations).
 */
 
 /*! @ingroup cpp_types
diff --git a/src/Simd/SimdSynet.hpp b/src/Simd/SimdSynet.hpp
index 8164f4182e..f70f7748d0 100644
--- a/src/Simd/SimdSynet.hpp
+++ b/src/Simd/SimdSynet.hpp
@@ -784,6 +784,217 @@ namespace Simd
         void * _context;
         Shape _shape, _order;
     };
+
+    //-------------------------------------------------------------------------------------------------
+
+    /*! @ingroup cpp_synet
+
+        \short The SynetInnerProduct32f class is a C++ wrapper of FP32 inner product (matrix multiplication).
+
+        The class wraps C API functions ::SimdSynetInnerProduct32fInit, ::SimdSynetInnerProduct32fInternalBufferSize,
+        ::SimdSynetInnerProduct32fExternalBufferSize, ::SimdSynetInnerProduct32fSetParams and
+        ::SimdSynetInnerProduct32fForward. It computes C = A*B, optionally adds bias and applies activation:
+        \verbatim
+        for(i = 0; i < M; ++i)
+            for(j = 0; j < N; ++j)
+            {
+                sum = bias ? bias[j] : 0;
+                for(k = 0; k < K; ++k)
+                    sum += A[i, k] * (transB ? B[j, k] : B[k, j]);
+                C[i, j] = Activate(sum, activation, params);
+            }
+        \endverbatim
+
+        When \a constB is ::SimdTrue, matrix B must be supplied to SetParams() and can be reordered
+        or cached inside the context. Call Init() and SetParams() before Forward(). Use Enable() to check
+        that a context was created. The context is released by Clear() or by the destructor.
+
+        Using example:
+        \verbatim
+        #include "Simd/SimdSynet.hpp"
+
+        int main()
+        {
+            const size_t M = 4, N = 8, K = 16;
+            std::vector<float> A(M * K), B(K * N), C(M * N), bias(N, 0.0f);
+            for (size_t i = 0; i < A.size(); ++i)
+                A[i] = float(i) * 0.01f;
+            for (size_t i = 0; i < B.size(); ++i)
+                B[i] = float(i) * 0.02f;
+
+            Simd::SynetInnerProduct32f innerProduct;
+            innerProduct.Init(M, N, K, SimdFalse, SimdTrue, SimdTrue, SimdConvolutionActivationIdentity);
+            if (innerProduct.Enable())
+            {
+                innerProduct.SetParams(B.data(), NULL, bias.data(), NULL);
+                innerProduct.Forward(A.data(), NULL, NULL, C.data());
+            }
+
+            return 0;
+        }
+        \endverbatim
+    */
+    class SynetInnerProduct32f
+    {
+    public:
+        /*!
+            Creates a new empty SynetInnerProduct32f class.
+        */
+        SynetInnerProduct32f()
+            : _context(NULL)
+            , _M(0)
+            , _N(0)
+            , _K(0)
+            , _transB(SimdFalse)
+            , _constB(SimdFalse)
+            , _bias(SimdFalse)
+            , _activation(SimdConvolutionActivationIdentity)
+        {
+        }
+
+        /*!
+            SynetInnerProduct32f class destructor. Releases internal context.
+        */
+        virtual ~SynetInnerProduct32f()
+        {
+            Clear();
+        }
+
+        /*!
+            Initializes (or re-initializes) an FP32 inner-product context.
+
+            Creates an internal context with using of function ::SimdSynetInnerProduct32fInit.
+            The context is recreated only if matrix sizes or inner-product flags were changed.
+
+            \note This function is a C++ wrapper for function ::SimdSynetInnerProduct32fInit.
+
+            \param [in] M - a height of A and C matrices.
+            \param [in] N - a width of B and C matrices.
+            \param [in] K - a width of A and height of B matrices.
+            \param [in] transB - a flag indicating that B is stored as N*K instead of K*N.
+            \param [in] constB - a flag indicating that matrix B is constant and can be set once.
+            \param [in] bias - a flag to add bias to output matrix C.
+            \param [in] activation - an activation function type used after inner product.
+        */
+        SIMD_INLINE void Init(size_t M, size_t N, size_t K, SimdBool transB, SimdBool constB, SimdBool bias, SimdConvolutionActivationType activation)
+        {
+            if (_M != M || _N != N || _K != K || _transB != transB || _constB != constB || _bias != bias || _activation != activation)
+            {
+                Clear();
+                _M = M;
+                _N = N;
+                _K = K;
+                _transB = transB;
+                _constB = constB;
+                _bias = bias;
+                _activation = activation;
+                _context = SimdSynetInnerProduct32fInit(_M, _N, _K, _transB, _constB, _bias, _activation);
+            }
+        }
+
+        /*!
+            Checks that the internal inner-product context was created.
+
+            \return true if the context exists and Forward() can be called.
+        */
+        SIMD_INLINE bool Enable() const
+        {
+            return _context != NULL;
+        }
+
+        /*!
+            Gets the size of internal storage used by the inner-product context.
+
+            The returned value is a number of FP32 elements.
+
+            \note This function is a C++ wrapper for function ::SimdSynetInnerProduct32fInternalBufferSize.
+
+            \return a number of FP32 elements used by internal buffers.
+        */
+        SIMD_INLINE size_t InternalBufferSize() const
+        {
+            return _context ? SimdSynetInnerProduct32fInternalBufferSize(_context) : 0;
+        }
+
+        /*!
+            Gets the size of caller-provided temporary buffer for FP32 inner product.
+
+            The returned value is a number of FP32 elements. The current FP32 implementations do not
+            require an external buffer and return 0, but callers can use this value when allocating
+            the \a buf argument of Forward().
+
+            \note This function is a C++ wrapper for function ::SimdSynetInnerProduct32fExternalBufferSize.
+
+            \return a number of FP32 elements required for external temporary buffer.
+        */
+        SIMD_INLINE size_t ExternalBufferSize() const
+        {
+            return _context ? SimdSynetInnerProduct32fExternalBufferSize(_context) : 0;
+        }
+
+        /*!
+            Sets weights, bias and activation parameters for FP32 inner product.
+
+            This function must be called before Forward(). If \a constB was ::SimdTrue during
+            initialization, \a weight provides matrix B and the implementation may reorder and store it internally.
+            If \a internal is not NULL, ::SimdTrue means the weights were copied/reordered into the context;
+            ::SimdFalse means the original \a weight pointer can be used by later forward calls and must remain valid.
+
+            \note This function is a C++ wrapper for function ::SimdSynetInnerProduct32fSetParams.
+
+            \param [in] weight - a pointer to FP32 matrix B weights.
+            \param [out] internal - a pointer to a flag receiving weight storage mode. Can be NULL.
+            \param [in] bias - a pointer to FP32 bias array with N elements. Can be NULL.
+            \param [in] params - a pointer to FP32 parameters of activation function (see ::SimdConvolutionActivationType). Can be NULL when activation does not require parameters.
+        */
+        SIMD_INLINE void SetParams(const float * weight, SimdBool * internal, const float * bias, const float * params)
+        {
+            if (_context)
+                SimdSynetInnerProduct32fSetParams(_context, weight, internal, bias, params);
+        }
+
+        /*!
+            Performs FP32 inner-product forward propagation.
+
+            The function computes C = A*B, optionally adds bias and applies activation stored in the
+            context created by Init() and SetParams(). If B is constant, it can be NULL when it was
+            set by SetParams(). The \a buf argument can be NULL (it causes usage of internal buffer).
+
+            \note This function is a C++ wrapper for function ::SimdSynetInnerProduct32fForward.
+
+            \param [in] A - a pointer to FP32 A matrix with M*K elements.
+            \param [in] B - a pointer to FP32 B matrix. Can be NULL if B is constant.
+            \param [out] buf - a pointer to external temporary FP32 buffer. Can be NULL.
+            \param [out] C - a pointer to FP32 output matrix with M*N elements.
+        */
+        SIMD_INLINE void Forward(const float * A, const float * B, float * buf, float * C)
+        {
+            if (_context)
+                SimdSynetInnerProduct32fForward(_context, A, B, buf, C);
+        }
+
+        /*!
+            Releases internal context and clears stored inner-product parameters.
+        */
+        SIMD_INLINE void Clear()
+        {
+            if (_context)
+                SimdRelease(_context), _context = NULL;
+            _M = 0;
+            _N = 0;
+            _K = 0;
+            _transB = SimdFalse;
+            _constB = SimdFalse;
+            _bias = SimdFalse;
+            _activation = SimdConvolutionActivationIdentity;
+        }
+
+    private:
+        void * _context;
+        size_t _M, _N, _K;
+        SimdBool _transB, _constB, _bias;
+        SimdConvolutionActivationType _activation;
+    };
 }
 
 #endif
diff --git a/src/Test/TestCheckCpp.cpp b/src/Test/TestCheckCpp.cpp
index e29b18ab21..39743c9980 100644
--- a/src/Test/TestCheckCpp.cpp
+++ b/src/Test/TestCheckCpp.cpp
@@ -354,6 +354,42 @@ namespace Test
                 std::cout << "TestSynetPermute is failed at " << i << " : " << dst1[i] << " != " << dst2[i] << std::endl;
         }
     }
+
+    static void TestSynetInnerProduct32f()
+    {
+        const size_t M = 4, N = 8, K = 16;
+        std::vector<float> A(M * K), B(K * N), C1(M * N, 0.0f), C2(M * N, 0.0f), bias(N, 0.1f);
+        for (size_t i = 0; i < A.size(); ++i)
+            A[i] = float(i) * 0.01f;
+        for (size_t i = 0; i < B.size(); ++i)
+            B[i] = float(i) * 0.02f;
+
+        Simd::SynetInnerProduct32f innerProduct;
+        innerProduct.Init(M, N, K, SimdFalse, SimdTrue, SimdTrue, SimdConvolutionActivationIdentity);
+        if (innerProduct.Enable())
+        {
+            innerProduct.SetParams(B.data(), NULL, bias.data(), NULL);
+            innerProduct.Forward(A.data(), NULL, NULL, C1.data());
+        }
+
+        void* context = SimdSynetInnerProduct32fInit(M, N, K, SimdFalse, SimdTrue, SimdTrue, SimdConvolutionActivationIdentity);
+        if (context)
+        {
+            SimdSynetInnerProduct32fSetParams(context, B.data(), NULL, bias.data(), NULL);
+            SimdSynetInnerProduct32fForward(context, A.data(), NULL, NULL, C2.data());
+            if (innerProduct.InternalBufferSize() != SimdSynetInnerProduct32fInternalBufferSize(context))
+                std::cout << "TestSynetInnerProduct32f is failed : InternalBufferSize mismatch" << std::endl;
+            if (innerProduct.ExternalBufferSize() != SimdSynetInnerProduct32fExternalBufferSize(context))
+                std::cout << "TestSynetInnerProduct32f is failed : ExternalBufferSize mismatch" << std::endl;
+            SimdRelease(context);
+        }
+
+        for (size_t i = 0; i < C1.size(); ++i)
+        {
+            if (C1[i] != C2[i])
+                std::cout << "TestSynetInnerProduct32f is failed at " << i << " : " << C1[i] << " != " << C2[i] << std::endl;
+        }
+    }
 #endif
 
     void CheckCpp()
@@ -392,6 +428,7 @@ namespace Test
         TestSynetQuantizedMul();
         TestSynetGatherElements();
         TestSynetPermute();
+        TestSynetInnerProduct32f();
 #endif
     }
 }