diff --git a/src/core/NEON/kernels/assembly/gemm_common.hpp b/src/core/NEON/kernels/assembly/gemm_common.hpp
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+/*
+ * Copyright (c) 2017-2020 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * 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.
+ */
+#pragma once
+
+#include "arm_gemm_compute_iface.hpp"
+
+#include <cstddef>
+#include <cassert>
+
+#define UNUSED(x)   (void)(x)
+
+namespace arm_gemm {
+
+// Abstract class for the GEMM/GEMV functions.
+//
+// GEMM implementations may be "native" (never require any input
+// permutation), "pretransposed" (require permutation up-front) or require
+// working space (permute as they go along).  This interface should support
+// all of them.
+
+// The real GemmCommon class is templated based on the operand and return
+// type.  This is an interface class which is independent of those types.
+class IGemmCommon {
+public:
+    /* Pass in the pointers to the arrays to be operated on and their
+     * strides.  This "generic" version uses void *s, the preferred version
+     * is the one provided by templated GemmCommon (below) which takes
+     * appropriately typed pointers.  If B is pretransposed (see below) then
+     * the settings for B here are ignored.
+     */
+    virtual void set_arrays_generic(const void *A, const int lda, const int A_batch_stride, const int A_multi_stride,
+                                    const void *B, const int ldb, /* batches share B */     const int B_multi_stride,
+                                          void *C, const int ldc, const int C_batch_stride, const int C_multi_stride,
+                                    const void *bias, /* no row or batch stride needed */   const int bias_multi_stride) = 0;
+
+    /** @returns an ndrange containing ranges of the compute space which can be
+     * broken up and parallelised over
+     */
+    virtual ndrange_t get_window_size() const = 0;
+
+    /* The maximum thread count is specified when the GEMM is created.  Some
+     * implementations need to know how many threads will actually run in
+     * order to work properly.
+     *
+     * In some cases, after creating the GEMM the number of threads needs to
+     * be reduced (e.g. not enough work to split across threads).  This
+     * method allows the number of actual threads to be run to be set (must
+     * be equal or lower).
+     *
+     * This has an empty default implementation, as GEMMs which don't care
+     * about thread count can safely ignore this.
+     */
+    virtual void set_nthreads(int) { };
+
+    /* Whether this GEMM can be dynamically scheduled or not. */
+    virtual bool supports_dynamic_scheduling() const { return false; }
+
+    /** Main execute member fucntion
+     * @param [in] work_range     specifies the range of work we want to be computed, total range defined by get_window_size()
+     * @param [in] thread_locator where are we inside of the thread space
+     * @naram [in] threadid       a unique threadid
+     */
+    virtual void execute(const ndcoord_t& work_range, const ndcoord_t& thread_locator, int threadid) = 0;
+
+    /*** Working space interface (optional) ***/
+    /* Total number of bytes of temporary working space needed.  If zero, it's not necessary to call set_working_space(). */
+    virtual size_t get_working_size() const { return 0; }
+    /* Provide working space buffer - the void * passed in must remain allocated for the duration of any execute calls. */
+    virtual void set_working_space(void *) { };
+
+    /*** "Pretransposed" interface (optional) ***/
+    /* Is this object set up for pretranspose?  If so, pretranspose_array() needs to be called before execute(); */
+    virtual bool B_is_pretransposed() const { return false; }
+    /* Does pretranspose still need to be done? */
+    virtual bool B_pretranspose_required() const { return false; }
+    /* Total number of bytes of space needed for pretransposed arrays. */
+    virtual size_t get_B_pretransposed_array_size() const { return 0; }
+    /* Perform pretranspose - arguments are output, input, input row stride and input multi stride. */
+    /* The "real" version of this depends on the templated operand type (see below).  */
+    virtual void pretranspose_B_array_generic(void *, const void *, const int, const int) = 0;
+    /* Set pretransposed data - the void * passed in must previously have been passed to pretranspose_B_array() for the same or a similar GEMM. */
+    virtual void set_pretransposed_B_data(void *) { }
+
+    /*** "Quantized bias" interface (optional) ***/
+    /* Set the bias vector for quantized GEMMs */
+    virtual void set_quantized_bias(const int32_t *bias, size_t bias_multi_stride)
+    {
+        UNUSED(bias);
+        UNUSED(bias_multi_stride);
+    }
+
+    // Destructor
+    virtual ~IGemmCommon() { }
+};
+
+/* "Real" GemmCommon class which is templated on the operand and return types.
+ *
+ * In addition to correctly typed versions of the functions that operate on
+ * operand and return data, this class provides a default implementation of
+ * 'set_arrays' to capture the provided arguments in protected class
+ * members, as essentially any implementation will need these.
+ */
+template<typename To, typename Tr>
+class GemmCommon : public IGemmCommon {
+protected:
+    const To *_Aptr=nullptr;
+    int _lda=0;
+    int _A_batch_stride=0;
+    int _A_multi_stride=0;
+    const To *_Bptr=nullptr;
+    int _ldb=0;
+    int _B_multi_stride=0;
+    Tr *_Cptr=nullptr;
+    int _ldc=0;
+    int _C_batch_stride=0;
+    int _C_multi_stride=0;
+    const Tr *_bias=nullptr;
+    int _bias_multi_stride=0;
+
+public:
+    /* Pass in the pointers to the arrays to be operated on and their
+     * strides (templated version with appropriate types). */
+    virtual void set_arrays(const To *A, const int lda, const int A_batch_stride, const int A_multi_stride,
+                            const To *B, const int ldb, /* batches share B */     const int B_multi_stride,
+                                  Tr *C, const int ldc, const int C_batch_stride, const int C_multi_stride,
+                            const Tr *bias, /* no row or batch stride needed */   const int bias_multi_stride) {
+        _Aptr = A;
+        _lda = lda;
+        _A_batch_stride = A_batch_stride;
+        _A_multi_stride = A_multi_stride;
+        _Bptr = B;
+        _ldb = ldb;
+        _B_multi_stride = B_multi_stride;
+        _Cptr = C;
+        _ldc = ldc;
+        _C_batch_stride = C_batch_stride;
+        _C_multi_stride = C_multi_stride;
+        _bias = bias;
+        _bias_multi_stride = bias_multi_stride;
+    }
+
+    /* Implementation of the void * overload which casts its arguments to the appropriate type. */
+    void set_arrays_generic(const void *A, const int lda, const int A_batch_stride, const int A_multi_stride,
+                            const void *B, const int ldb, /* batches share B */     const int B_multi_stride,
+                                  void *C, const int ldc, const int C_batch_stride, const int C_multi_stride,
+                            const void *bias, /* no row or batch stride needed */   const int bias_multi_stride) override {
+        set_arrays(static_cast<const To *>(A), lda, A_batch_stride, A_multi_stride,
+                   static_cast<const To *>(B), ldb, B_multi_stride,
+                   static_cast<Tr *>(C), ldc, C_batch_stride, C_multi_stride,
+                   static_cast<const Tr *>(bias), bias_multi_stride);
+    }
+
+    /*** "Pretransposed" interface ***/
+
+    /* Perform pretranspose - the void * passed in must remain allocated for the duration of any execute calls. */
+    /* Arguments are: output buffer pointer, source pointer, source row stride, source multi stride */
+    virtual void pretranspose_B_array(void *, const To *, const int, const int) { };
+
+    /* Implementation of the void * overload which casts its arguments to the appropriate type. */
+    void pretranspose_B_array_generic(void *out, const void *in, const int row_stride, const int multi_stride) override {
+        pretranspose_B_array(out, static_cast<const To *>(in), row_stride, multi_stride);
+    }
+};
+
+template<typename GemmKernel>
+inline
+int unsigned get_total_window_size(const GemmKernel& kernel)
+{
+    auto window=kernel.get_window_size();
+
+    unsigned int total = 1;
+    for(unsigned i = 0; i != arm_gemm::ndrange_max; ++i)
+    {
+        total *= window.get_size(i);
+    }
+
+    return total;
+}
+
+} // namespace arm_gemm