Add skeleton of ClMatMulLowpNativeMMULKernel

The skeleton code consists of modifications
   - to build the library with the quantized matmul kernel
   - refactoring of some common utilities
   - empty OpenCL Kernels for four configurations ([Lhs, Rhs] X [Nt, t])
   - some validation tests and skeleton for functional tests

Resolves: COMPMID-6473
Change-Id: Id8401f789d34277dceb1f91afd68c9c88275618a
Signed-off-by: Gunes Bayir <gunes.bayir@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/10273
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Viet-Hoa Do <viet-hoa.do@arm.com>
Benchmark: Arm Jenkins <bsgcomp@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>

8 files changed, 436 insertions, 120 deletions

diff --git a/src/gpu/cl/ClKernelLibrary.cpp b/src/gpu/cl/ClKernelLibrary.cpp
index e4a3d30b6d..73bb96298e 100644
--- a/src/gpu/cl/ClKernelLibrary.cpp
+++ b/src/gpu/cl/ClKernelLibrary.cpp
@@ -322,6 +322,10 @@ const std::map<std::string, std::string> ClKernelLibrary::_kernel_program_map =
     { "mat_mul_native_quantized_nt_t", "common/mat_mul_quantized.cl" },
     { "mat_mul_native_quantized_t_nt", "common/mat_mul_quantized.cl" },
     { "mat_mul_native_quantized_t_t", "common/mat_mul_quantized.cl" },
+    { "mat_mul_native_quantized_mmul_nt_nt", "common/mat_mul_quantized_mmul.cl" },
+    { "mat_mul_native_quantized_mmul_nt_t", "common/mat_mul_quantized_mmul.cl" },
+    { "mat_mul_native_quantized_mmul_t_nt", "common/mat_mul_quantized_mmul.cl" },
+    { "mat_mul_native_quantized_mmul_t_t", "common/mat_mul_quantized_mmul.cl" },
     { "max_unpooling_layer_2", "common/unpooling_layer.cl" },
     { "mean_stddev_normalization", "common/mean_stddev_normalization.cl" },
     { "memset", "common/memset.cl" },
@@ -781,6 +785,10 @@ const std::map<std::string, std::string> ClKernelLibrary::_program_source_map =
         "common/mat_mul_quantized.cl",
 #include "./cl_kernels/common/mat_mul_quantized.clembed"
     },
+    {
+        "common/mat_mul_quantized_mmul.cl",
+#include "./cl_kernels/common/mat_mul_quantized_mmul.clembed"
+    },
 #ifdef ENABLE_NCHW_KERNELS
     {
         "nchw/batch_to_space.cl",
diff --git a/src/gpu/cl/kernels/ClMatMulLowpNativeKernel.cpp b/src/gpu/cl/kernels/ClMatMulLowpNativeKernel.cpp
index f7fdbe2c23..66331bc818 100644
--- a/src/gpu/cl/kernels/ClMatMulLowpNativeKernel.cpp
+++ b/src/gpu/cl/kernels/ClMatMulLowpNativeKernel.cpp
@@ -23,22 +23,22 @@
  */
 #include "src/gpu/cl/kernels/ClMatMulLowpNativeKernel.h"
 
-#include "arm_compute/core/utils/ActivationFunctionUtils.h"
 #include "arm_compute/core/CL/CLHelpers.h"
 #include "arm_compute/core/CL/ICLTensor.h"
 #include "arm_compute/core/ITensorPack.h"
+#include "arm_compute/core/QuantizationInfo.h"
 #include "arm_compute/core/TensorInfo.h"
+#include "arm_compute/core/utils/ActivationFunctionUtils.h"
+#include "arm_compute/core/utils/StringUtils.h"
 #include "arm_compute/core/utils/helpers/AdjustVecSize.h"
 #include "arm_compute/core/utils/misc/ShapeCalculator.h"
 #include "arm_compute/core/utils/quantization/AsymmHelpers.h"
-#include "arm_compute/core/utils/StringUtils.h"
 
 #include "src/common/utils/Log.h"
 #include "src/core/helpers/AutoConfiguration.h"
 #include "src/core/helpers/WindowHelpers.h"
 #include "src/gpu/cl/ClCompileContext.h"
-
-#include "arm_compute/core/QuantizationInfo.h"
+#include "src/gpu/cl/kernels/helpers/MatMulKernelHelpers.h"
 
 #include "support/Cast.h"
 #include "support/StringSupport.h"
@@ -80,24 +80,6 @@ Status validate_matmul_kernel_info(const MatMulKernelInfo &matmul_kernel_info)
 
     return Status{};
 }
-
-Status validate_input_shapes(const TensorShape &lhs_shape, const TensorShape &rhs_shape, const MatMulKernelInfo &matmul_kernel_info)
-{
-    const size_t lhs_k = matmul_kernel_info.adj_lhs ? lhs_shape.y() : lhs_shape.x();
-    const size_t rhs_k = matmul_kernel_info.adj_rhs ? rhs_shape.x() : rhs_shape.y();
-
-    ARM_COMPUTE_RETURN_ERROR_ON_MSG(lhs_k != rhs_k, "K dimension in Lhs and Rhs matrices must match.");
-    ARM_COMPUTE_RETURN_ERROR_ON_MSG(lhs_shape.total_size() == 0, "Lhs tensor can't be empty");
-    ARM_COMPUTE_RETURN_ERROR_ON_MSG(rhs_shape.total_size() == 0, "Rhs tensor can't be empty");
-
-    constexpr size_t batch_dim_start = 2;
-    for(size_t i = batch_dim_start; i < Coordinates::num_max_dimensions; ++i)
-    {
-        ARM_COMPUTE_RETURN_ERROR_ON_MSG(lhs_shape[i] != rhs_shape[i], "Batch dimension broadcasting is not supported");
-    }
-
-    return Status{};
-}
 }
 ClMatMulLowpNativeKernel::ClMatMulLowpNativeKernel()
 {
@@ -110,7 +92,7 @@ Status ClMatMulLowpNativeKernel::validate(const ITensorInfo *lhs, const ITensorI
     ARM_COMPUTE_RETURN_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(lhs, 1, DataType::QASYMM8, DataType::QASYMM8_SIGNED);
     ARM_COMPUTE_RETURN_ERROR_ON_MISMATCHING_DATA_TYPES(lhs, rhs);
     ARM_COMPUTE_RETURN_ON_ERROR(validate_matmul_kernel_info(matmul_kernel_info));
-    ARM_COMPUTE_RETURN_ON_ERROR(validate_input_shapes(lhs->tensor_shape(), rhs->tensor_shape(), matmul_kernel_info));
+    ARM_COMPUTE_RETURN_ON_ERROR(validate_matmul_input_shapes(lhs->tensor_shape(), rhs->tensor_shape(), matmul_kernel_info));
 
     ARM_COMPUTE_RETURN_ERROR_ON_MSG((act_info.activation() != ActivationFunction::IDENTITY && act_info.activation() != ActivationFunction::RELU
                                      && act_info.activation() != ActivationFunction::LU_BOUNDED_RELU && act_info.activation() != ActivationFunction::BOUNDED_RELU),
diff --git a/src/gpu/cl/kernels/ClMatMulLowpNativeMMULKernel.cpp b/src/gpu/cl/kernels/ClMatMulLowpNativeMMULKernel.cpp
new file mode 100644
index 0000000000..4a6a3f396e
--- /dev/null
+++ b/src/gpu/cl/kernels/ClMatMulLowpNativeMMULKernel.cpp
@@ -0,0 +1,165 @@
+/*
+ * Copyright (c) 2023 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.
+ */
+#include "src/gpu/cl/kernels/ClMatMulLowpNativeMMULKernel.h"
+
+#include "arm_compute/core/CL/CLHelpers.h"
+#include "arm_compute/core/CL/ICLTensor.h"
+#include "arm_compute/core/Error.h"
+#include "arm_compute/core/ITensorPack.h"
+#include "arm_compute/core/TensorInfo.h"
+#include "arm_compute/core/utils/StringUtils.h"
+#include "arm_compute/core/utils/misc/ShapeCalculator.h"
+
+#include "src/common/utils/Log.h"
+#include "src/core/helpers/AutoConfiguration.h"
+#include "src/core/helpers/WindowHelpers.h"
+#include "src/gpu/cl/ClCompileContext.h"
+#include "src/gpu/cl/kernels/helpers/MatMulKernelHelpers.h"
+#include "support/Cast.h"
+#include "support/StringSupport.h"
+
+namespace arm_compute
+{
+namespace opencl
+{
+namespace kernels
+{
+namespace
+{
+// Block size dimensions for the MMUL extension
+constexpr int mmul_m0 = 4;
+constexpr int mmul_n0 = 4;
+constexpr int mmul_k0 = 16;
+
+Status validate_matmul_kernel_info(const MatMulKernelInfo &matmul_kernel_info)
+{
+    ARM_COMPUTE_UNUSED(matmul_kernel_info);
+    // TODO: Validate MatMulKernelInfo
+    return Status{};
+}
+} // namespace
+
+ClMatMulLowpNativeMMULKernel::ClMatMulLowpNativeMMULKernel()
+{
+    _type = CLKernelType::GEMM;
+}
+
+Status ClMatMulLowpNativeMMULKernel::validate(const ITensorInfo *lhs, const ITensorInfo *rhs, const ITensorInfo *bias, const ITensorInfo *dst, const MatMulKernelInfo &matmul_kernel_info,
+                                              const ActivationLayerInfo &act_info)
+{
+    ARM_COMPUTE_RETURN_ERROR_ON_NULLPTR(lhs, rhs, dst);
+    ARM_COMPUTE_RETURN_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(lhs, 1, DataType::QASYMM8, DataType::QASYMM8_SIGNED);
+    ARM_COMPUTE_RETURN_ERROR_ON_MISMATCHING_DATA_TYPES(lhs, rhs);
+    ARM_COMPUTE_RETURN_ON_ERROR(validate_matmul_kernel_info(matmul_kernel_info));
+    ARM_COMPUTE_RETURN_ON_ERROR(validate_matmul_input_shapes(lhs->tensor_shape(), rhs->tensor_shape(), matmul_kernel_info));
+    // TODO: Check MMUL block sizes against the tensor shapes
+    ARM_COMPUTE_UNUSED(mmul_k0);
+
+    ARM_COMPUTE_RETURN_ERROR_ON_MSG((act_info.activation() != ActivationFunction::IDENTITY && act_info.activation() != ActivationFunction::RELU
+                                     && act_info.activation() != ActivationFunction::LU_BOUNDED_RELU && act_info.activation() != ActivationFunction::BOUNDED_RELU),
+                                    "Activation Function specified is unsupported.");
+    const TensorShape expected_output_shape = misc::shape_calculator::compute_matmul_shape(lhs->tensor_shape(), rhs->tensor_shape(), matmul_kernel_info);
+
+    if(dst->total_size() != 0)
+    {
+        const TensorInfo tensor_info_output = dst->clone()->set_tensor_shape(expected_output_shape);
+        ARM_COMPUTE_RETURN_ERROR_ON_MISMATCHING_SHAPES(dst, &tensor_info_output);
+        ARM_COMPUTE_RETURN_ERROR_ON_MISMATCHING_DATA_TYPES(lhs, dst);
+    }
+
+    if(bias != nullptr)
+    {
+        ARM_COMPUTE_RETURN_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(bias, 1, DataType::S32);
+        ARM_COMPUTE_RETURN_ERROR_ON(bias->num_dimensions() > 1);
+        ARM_COMPUTE_RETURN_ERROR_ON(expected_output_shape[0] != bias->dimension(0));
+    }
+
+    return Status{};
+}
+
+void ClMatMulLowpNativeMMULKernel::configure(const ClCompileContext &compile_context, ITensorInfo *lhs, ITensorInfo *rhs, ITensorInfo *bias, ITensorInfo *dst,
+                                             const MatMulKernelInfo    &matmul_kernel_info,
+                                             const ActivationLayerInfo &act_info)
+{
+    ARM_COMPUTE_ERROR_ON_NULLPTR(lhs, rhs, dst);
+    ARM_COMPUTE_LOG_PARAMS(lhs, rhs, bias, dst, matmul_kernel_info, act_info);
+    ARM_COMPUTE_ERROR_THROW_ON(validate(lhs, rhs, bias, dst, matmul_kernel_info));
+
+    // dst tensor auto initialization if not yet initialized
+    auto_init_if_empty(*dst, lhs->clone()->set_tensor_shape(misc::shape_calculator::compute_matmul_shape(lhs->tensor_shape(), rhs->tensor_shape(), matmul_kernel_info)));
+
+    ARM_COMPUTE_UNUSED(compile_context, lhs, rhs, bias, matmul_kernel_info, act_info);
+
+    // Configure kernel window
+    const auto win_config = validate_and_configure_window_for_mmul_kernels(lhs, rhs, dst, matmul_kernel_info, mmul_m0, mmul_n0);
+    ARM_COMPUTE_ERROR_THROW_ON(win_config.first);
+    IClKernel::configure_internal(win_config.second);
+
+    CLBuildOptions build_opts;
+    // TODO: Build options & configuration
+
+    std::string kernel_name("mat_mul_native_quantized_mmul");
+    kernel_name += matmul_kernel_info.adj_lhs ? "_t" : "_nt";
+    kernel_name += matmul_kernel_info.adj_rhs ? "_t" : "_nt";
+
+    // A macro guard to compile ONLY the kernel of interest
+    build_opts.add_option("-D" + upper_string(kernel_name));
+
+    // Create kernel
+    _kernel = create_kernel(compile_context, kernel_name, build_opts.options());
+
+    // TODO: Tuner configuration
+}
+
+void ClMatMulLowpNativeMMULKernel::run_op(ITensorPack &tensors, const Window &window, cl::CommandQueue &queue)
+{
+    ARM_COMPUTE_ERROR_ON_UNCONFIGURED_KERNEL(this);
+    ARM_COMPUTE_ERROR_ON_INVALID_SUBWINDOW(ICLKernel::window(), window);
+
+    const auto *lhs  = utils::cast::polymorphic_downcast<const ICLTensor *>(tensors.get_const_tensor(TensorType::ACL_SRC_0));
+    const auto *rhs  = utils::cast::polymorphic_downcast<const ICLTensor *>(tensors.get_const_tensor(TensorType::ACL_SRC_1));
+    const auto *bias = utils::cast::polymorphic_downcast<const ICLTensor *>(tensors.get_const_tensor(TensorType::ACL_SRC_2)); // nullptr if bias is not present
+    auto       *dst  = utils::cast::polymorphic_downcast<ICLTensor *>(tensors.get_tensor(TensorType::ACL_DST));
+
+    ARM_COMPUTE_ERROR_ON_NULLPTR(lhs, rhs, dst);
+    ARM_COMPUTE_LOG_PARAMS(lhs, rhs, bias, dst);
+
+    unsigned int idx = 0;
+    add_3d_tensor_nhw_argument(idx, lhs);
+    add_3d_tensor_nhw_argument(idx, rhs);
+
+    if(bias != nullptr)
+    {
+        add_3d_tensor_nhw_argument(idx, bias);
+    }
+    add_3d_tensor_nhw_argument(idx, dst);
+
+    // LWS_x should be multiple of 16 at least. (32, 2) has been chosen to have more work-items on a single core
+    // LWS also enforces the order of execution of the work items which improves cache utilization
+    enqueue(queue, *this, window, cl::NDRange(32, 2), false);
+}
+
+} // namespace kernels
+} // namespace opencl
+} // namespace arm_compute
diff --git a/src/gpu/cl/kernels/ClMatMulLowpNativeMMULKernel.h b/src/gpu/cl/kernels/ClMatMulLowpNativeMMULKernel.h
new file mode 100644
index 0000000000..d2aa40b2e2
--- /dev/null
+++ b/src/gpu/cl/kernels/ClMatMulLowpNativeMMULKernel.h
@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) 2023 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.
+ */
+#ifndef ACL_SRC_GPU_CL_KERNELS_CLMATMULLOWPNATIVEMMULKERNEL_H
+#define ACL_SRC_GPU_CL_KERNELS_CLMATMULLOWPNATIVEMMULKERNEL_H
+
+#include "arm_compute/function_info/ActivationLayerInfo.h"
+#include "src/core/common/Macros.h"
+#include "src/gpu/cl/ClCompileContext.h"
+#include "src/gpu/cl/IClKernel.h"
+
+namespace arm_compute
+{
+// Forward declerations
+struct MatMulKernelInfo;
+namespace opencl
+{
+namespace kernels
+{
+class ClMatMulLowpNativeMMULKernel : public IClKernel
+{
+public:
+    ClMatMulLowpNativeMMULKernel();
+    ARM_COMPUTE_DISALLOW_COPY_ALLOW_MOVE(ClMatMulLowpNativeMMULKernel);
+
+    /** Initialise the kernel's input and output.
+     *
+     * Similar to @ref ClMatMulLowpNativeKernel::configure()
+     *
+     * @return a status
+     */
+    void configure(const ClCompileContext &compile_context, ITensorInfo *lhs, ITensorInfo *rhs, ITensorInfo *bias, ITensorInfo *dst, const MatMulKernelInfo &matmul_kernel_info,
+                   const ActivationLayerInfo &act_info = ActivationLayerInfo());
+    /** Static function to check if given info will lead to a valid configuration
+     *
+     * Similar to @ref ClMatMulLowpNativeKernel::configure()
+     *
+     * @return a status
+     */
+    static Status validate(const ITensorInfo *lhs, const ITensorInfo *rhs, const ITensorInfo *bias, const ITensorInfo *dst, const MatMulKernelInfo &matmul_kernel_info,
+                           const ActivationLayerInfo &act_info = ActivationLayerInfo());
+
+    // Inherited methods overridden:
+    void run_op(ITensorPack &tensors, const Window &window, cl::CommandQueue &queue) override;
+};
+} // namespace kernels
+} // namespace opencl
+} // namespace arm_compute
+#endif // ACL_SRC_GPU_CL_KERNELS_CLMATMULLOWPNATIVEMMULKERNEL_H
diff --git a/src/gpu/cl/kernels/ClMatMulNativeKernel.cpp b/src/gpu/cl/kernels/ClMatMulNativeKernel.cpp
index 8f8ccfc41f..41ba5d5e25 100644
--- a/src/gpu/cl/kernels/ClMatMulNativeKernel.cpp
+++ b/src/gpu/cl/kernels/ClMatMulNativeKernel.cpp
@@ -23,20 +23,21 @@
  */
 #include "src/gpu/cl/kernels/ClMatMulNativeKernel.h"
 
-#include "arm_compute/core/utils/ActivationFunctionUtils.h"
 #include "arm_compute/core/CL/CLHelpers.h"
 #include "arm_compute/core/CL/ICLTensor.h"
 #include "arm_compute/core/ITensorPack.h"
 #include "arm_compute/core/TensorInfo.h"
+#include "arm_compute/core/utils/ActivationFunctionUtils.h"
+#include "arm_compute/core/utils/StringUtils.h"
 #include "arm_compute/core/utils/helpers/AdjustVecSize.h"
 #include "arm_compute/core/utils/misc/ShapeCalculator.h"
-#include "arm_compute/core/utils/StringUtils.h"
 
 #include "src/common/utils/Log.h"
 #include "src/core/CL/CLUtils.h"
 #include "src/core/helpers/AutoConfiguration.h"
 #include "src/core/helpers/WindowHelpers.h"
 #include "src/gpu/cl/kernels/gemm/ClGemmHelpers.h"
+#include "src/gpu/cl/kernels/helpers/MatMulKernelHelpers.h"
 
 #include "support/Cast.h"
 #include "support/StringSupport.h"
@@ -79,24 +80,6 @@ Status validate_matmul_kernel_info(const MatMulKernelInfo &matmul_kernel_info)
     return Status{};
 }
 
-Status validate_input_shapes(const TensorShape &lhs_shape, const TensorShape &rhs_shape, const MatMulKernelInfo &matmul_kernel_info)
-{
-    const size_t lhs_k = matmul_kernel_info.adj_lhs ? lhs_shape.y() : lhs_shape.x();
-    const size_t rhs_k = matmul_kernel_info.adj_rhs ? rhs_shape.x() : rhs_shape.y();
-
-    ARM_COMPUTE_RETURN_ERROR_ON_MSG(lhs_k != rhs_k, "K dimension in Lhs and Rhs matrices must match.");
-    ARM_COMPUTE_RETURN_ERROR_ON_MSG(lhs_shape.total_size() == 0, "Lhs tensor can't be empty");
-    ARM_COMPUTE_RETURN_ERROR_ON_MSG(rhs_shape.total_size() == 0, "Rhs tensor can't be empty");
-
-    constexpr size_t batch_dim_start = 2;
-    for(size_t i = batch_dim_start; i < Coordinates::num_max_dimensions; ++i)
-    {
-        ARM_COMPUTE_RETURN_ERROR_ON_MSG(lhs_shape[i] != rhs_shape[i], "Batch dimension broadcasting is not supported");
-    }
-
-    return Status{};
-}
-
 Status validate_export_to_cl_image(const ITensorInfo *rhs, const MatMulKernelInfo &matmul_kernel_info)
 {
     ARM_COMPUTE_RETURN_ERROR_ON(matmul_kernel_info.export_rhs_to_cl_image && rhs->lock_paddings());
@@ -131,7 +114,7 @@ Status ClMatMulNativeKernel::validate(const ITensorInfo *lhs, const ITensorInfo
     ARM_COMPUTE_RETURN_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(lhs, 1, DataType::F32, DataType::F16);
     ARM_COMPUTE_RETURN_ERROR_ON_MISMATCHING_DATA_TYPES(lhs, rhs);
     ARM_COMPUTE_RETURN_ON_ERROR(validate_matmul_kernel_info(matmul_kernel_info));
-    ARM_COMPUTE_RETURN_ON_ERROR(validate_input_shapes(lhs->tensor_shape(), rhs->tensor_shape(), matmul_kernel_info));
+    ARM_COMPUTE_RETURN_ON_ERROR(validate_matmul_input_shapes(lhs->tensor_shape(), rhs->tensor_shape(), matmul_kernel_info));
     ARM_COMPUTE_RETURN_ON_ERROR(validate_export_to_cl_image(rhs, matmul_kernel_info));
 
     const TensorShape expected_output_shape = misc::shape_calculator::compute_matmul_shape(lhs->tensor_shape(), rhs->tensor_shape(), matmul_kernel_info);
diff --git a/src/gpu/cl/kernels/ClMatMulNativeMMULKernel.cpp b/src/gpu/cl/kernels/ClMatMulNativeMMULKernel.cpp
index 44c720a40c..2420ad6a78 100644
--- a/src/gpu/cl/kernels/ClMatMulNativeMMULKernel.cpp
+++ b/src/gpu/cl/kernels/ClMatMulNativeMMULKernel.cpp
@@ -28,13 +28,14 @@
 #include "arm_compute/core/ITensorPack.h"
 #include "arm_compute/core/KernelDescriptors.h"
 #include "arm_compute/core/TensorInfo.h"
+#include "arm_compute/core/utils/StringUtils.h"
 #include "arm_compute/core/utils/helpers/AdjustVecSize.h"
 #include "arm_compute/core/utils/misc/ShapeCalculator.h"
-#include "arm_compute/core/utils/StringUtils.h"
 
 #include "src/common/utils/Log.h"
 #include "src/core/helpers/AutoConfiguration.h"
 #include "src/core/helpers/WindowHelpers.h"
+#include "src/gpu/cl/kernels/helpers/MatMulKernelHelpers.h"
 
 #include "support/Cast.h"
 #include "support/StringSupport.h"
@@ -52,13 +53,6 @@ constexpr int mmul_m0 = 4;
 constexpr int mmul_n0 = 4;
 constexpr int mmul_k0 = 4;
 
-inline std::pair<int, int> adjust_m0_n0(int m0, int n0, int m, int n)
-{
-    m0 = std::min(m0, m);
-    n0 = adjust_vec_size(n0, n);
-    return { m0, n0 };
-}
-
 Status validate_matmul_kernel_info(const MatMulKernelInfo &matmul_kernel_info)
 {
     const bool adj_lhs = matmul_kernel_info.adj_lhs;
@@ -83,68 +77,6 @@ Status validate_matmul_kernel_info(const MatMulKernelInfo &matmul_kernel_info)
 
     return Status{};
 }
-
-Status validate_input_shapes(const TensorShape &lhs_shape, const TensorShape &rhs_shape, const MatMulKernelInfo &matmul_kernel_info)
-{
-    const size_t lhs_k = matmul_kernel_info.adj_lhs ? lhs_shape.y() : lhs_shape.x();
-    const size_t rhs_k = matmul_kernel_info.adj_rhs ? rhs_shape.x() : rhs_shape.y();
-
-    ARM_COMPUTE_RETURN_ERROR_ON_MSG(lhs_k != rhs_k, "K dimension in Lhs and Rhs matrices must match.");
-    ARM_COMPUTE_RETURN_ERROR_ON_MSG_VAR((lhs_k % mmul_k0) != 0, "K dimension must be a multiple of %d", mmul_k0);
-    ARM_COMPUTE_RETURN_ERROR_ON_MSG(lhs_shape.total_size() == 0, "Lhs tensor can't be empty");
-    ARM_COMPUTE_RETURN_ERROR_ON_MSG(rhs_shape.total_size() == 0, "Rhs tensor can't be empty");
-
-    constexpr size_t batch_dim_start = 2;
-    for(size_t i = batch_dim_start; i < Coordinates::num_max_dimensions; ++i)
-    {
-        ARM_COMPUTE_RETURN_ERROR_ON_MSG(lhs_shape[i] != rhs_shape[i], "Batch dimension broadcasting is not supported");
-    }
-
-    return Status{};
-}
-
-std::pair<Status, Window> validate_and_configure_window(ITensorInfo *lhs, ITensorInfo *rhs, ITensorInfo *dst, const MatMulKernelInfo &matmul_kernel_info)
-{
-    ARM_COMPUTE_UNUSED(lhs, rhs);
-
-    const Window win = calculate_max_window(*dst, Steps(1, 1));
-
-    // Collapse along the Z direction
-    // This collapse needs to be here in order to tune the Z dimension of LWS
-    Window collapsed = win.collapse(win, Window::DimZ);
-
-    // Reconfigure window size, one arm_matrix_multiply call needs 16 threads to finish.
-    Window::Dimension x_dimension = collapsed.x();
-    Window::Dimension y_dimension = collapsed.y();
-
-    const int m = dst->dimension(1);
-    const int n = dst->dimension(0);
-
-    int m0{};
-    int n0{};
-    std::tie(m0, n0) = adjust_m0_n0(matmul_kernel_info.m0, matmul_kernel_info.n0, m, n);
-
-    // Make M and N multiple of M0 and N0 respectively
-    const unsigned int ceil_to_multiple_n_n0 = ceil_to_multiple(n, n0);
-    const unsigned int ceil_to_multiple_m_m0 = ceil_to_multiple(m, m0);
-
-    // Divide M and N by M0 and N0 respectively
-    const unsigned int n_div_n0 = ceil_to_multiple_n_n0 / n0;
-    const unsigned int m_div_m0 = ceil_to_multiple_m_m0 / m0;
-
-    // Make n_div_n0 and m_div_m0 multiple of mmul_n0 and mmul_m0 respectively
-    const unsigned int ceil_to_multiple_n_div_n0_mmul_n0 = ceil_to_multiple(n_div_n0, mmul_n0);
-    const unsigned int ceil_to_multiple_m_div_m0_mmul_m0 = ceil_to_multiple(m_div_m0, mmul_m0);
-
-    // Ensure x_dimension is multiple of MMUL block size (mmul_m0 * mmul_n0)
-    x_dimension.set_end(ceil_to_multiple_n_div_n0_mmul_n0 * mmul_m0);
-    y_dimension.set_end(ceil_to_multiple_m_div_m0_mmul_m0 / mmul_m0);
-
-    collapsed.set(Window::DimX, x_dimension);
-    collapsed.set(Window::DimY, y_dimension);
-
-    return std::make_pair(Status{}, collapsed);
-}
 }
 ClMatMulNativeMMULKernel::ClMatMulNativeMMULKernel()
 {
@@ -158,9 +90,14 @@ Status ClMatMulNativeMMULKernel::validate(const ITensorInfo *lhs, const ITensorI
     ARM_COMPUTE_RETURN_ERROR_ON_MSG(!arm_matrix_multiply_supported(CLKernelLibrary::get().get_device()), "The extension cl_arm_matrix_multiply is not supported on the target platform");
     ARM_COMPUTE_RETURN_ERROR_ON_MISMATCHING_DATA_TYPES(lhs, rhs);
     ARM_COMPUTE_RETURN_ON_ERROR(validate_matmul_kernel_info(matmul_kernel_info));
-    ARM_COMPUTE_RETURN_ON_ERROR(validate_input_shapes(lhs->tensor_shape(), rhs->tensor_shape(), matmul_kernel_info));
 
-    const TensorShape expected_output_shape = misc::shape_calculator::compute_matmul_shape(lhs->tensor_shape(), rhs->tensor_shape(), matmul_kernel_info);
+    const TensorShape &lhs_shape = lhs->tensor_shape();
+    ARM_COMPUTE_RETURN_ON_ERROR(validate_matmul_input_shapes(lhs_shape, rhs->tensor_shape(), matmul_kernel_info));
+
+    const size_t lhs_k = matmul_kernel_info.adj_lhs ? lhs_shape.y() : lhs_shape.x();
+    ARM_COMPUTE_RETURN_ERROR_ON_MSG_VAR((lhs_k % mmul_k0) != 0, "K dimension must be a multiple of %d", mmul_k0);
+
+    const TensorShape expected_output_shape = misc::shape_calculator::compute_matmul_shape(lhs_shape, rhs->tensor_shape(), matmul_kernel_info);
 
     if(dst->total_size() != 0)
     {
@@ -195,12 +132,13 @@ void ClMatMulNativeMMULKernel::configure(const ClCompileContext &compile_context
     _n = n;
     _k = k;
 
-    int m0{};
-    int n0{};
-    std::tie(m0, n0) = adjust_m0_n0(matmul_kernel_info.m0, matmul_kernel_info.n0, m, n);
+    const int m0 = std::min(matmul_kernel_info.m0, m);
+    const int n0 = adjust_vec_size(matmul_kernel_info.n0, n);
 
     // Configure kernel window
-    const auto win_config = validate_and_configure_window(lhs, rhs, dst, matmul_kernel_info);
+    const auto win_config = validate_and_configure_window_for_mmul_kernels(lhs, rhs, dst, matmul_kernel_info, mmul_m0,
+                                                                           mmul_n0);
+
     ARM_COMPUTE_ERROR_THROW_ON(win_config.first);
     IClKernel::configure_internal(win_config.second);
 
diff --git a/src/gpu/cl/kernels/helpers/MatMulKernelHelpers.cpp b/src/gpu/cl/kernels/helpers/MatMulKernelHelpers.cpp
new file mode 100644
index 0000000000..2407c6ca5e
--- /dev/null
+++ b/src/gpu/cl/kernels/helpers/MatMulKernelHelpers.cpp
@@ -0,0 +1,103 @@
+/*
+ * Copyright (c) 2023 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.
+ */
+
+#include "src/gpu/cl/kernels/helpers/MatMulKernelHelpers.h"
+
+#include "arm_compute/core/Coordinates.h"
+#include "arm_compute/core/utils/helpers/AdjustVecSize.h"
+#include "arm_compute/core/utils/math/Math.h"
+
+#include "src/core/helpers/WindowHelpers.h"
+
+namespace arm_compute
+{
+namespace opencl
+{
+namespace kernels
+{
+Status validate_matmul_input_shapes(const TensorShape &lhs_shape, const TensorShape &rhs_shape, const MatMulKernelInfo &matmul_kernel_info)
+{
+    const size_t lhs_k = matmul_kernel_info.adj_lhs ? lhs_shape.y() : lhs_shape.x();
+    const size_t rhs_k = matmul_kernel_info.adj_rhs ? rhs_shape.x() : rhs_shape.y();
+
+    ARM_COMPUTE_RETURN_ERROR_ON_MSG(lhs_k != rhs_k, "K dimension in Lhs and Rhs matrices must match.");
+    ARM_COMPUTE_RETURN_ERROR_ON_MSG(lhs_shape.total_size() == 0, "Lhs tensor can't be empty");
+    ARM_COMPUTE_RETURN_ERROR_ON_MSG(rhs_shape.total_size() == 0, "Rhs tensor can't be empty");
+
+    constexpr size_t batch_dim_start = 2;
+    for(size_t i = batch_dim_start; i < Coordinates::num_max_dimensions; ++i)
+    {
+        ARM_COMPUTE_RETURN_ERROR_ON_MSG(lhs_shape[i] != rhs_shape[i], "Batch dimension broadcasting is not supported");
+    }
+
+    return Status{};
+}
+
+std::pair<Status, Window> validate_and_configure_window_for_mmul_kernels(const ITensorInfo *lhs,
+                                                                         const ITensorInfo *rhs, const ITensorInfo *dst, const MatMulKernelInfo &matmul_kernel_info,
+                                                                         int mmul_m0, int mmul_n0)
+{
+    ARM_COMPUTE_UNUSED(lhs, rhs);
+
+    const Window win = calculate_max_window(*dst, Steps(1, 1));
+
+    // Collapse along the Z direction
+    // This collapse needs to be here in order to tune the Z dimension of LWS
+    Window collapsed = win.collapse(win, Window::DimZ);
+
+    // Reconfigure window size, one arm_matrix_multiply call needs 16 threads to finish.
+    Window::Dimension x_dimension = collapsed.x();
+    Window::Dimension y_dimension = collapsed.y();
+
+    const int m = dst->dimension(1);
+    const int n = dst->dimension(0);
+
+    const int m0 = std::min(matmul_kernel_info.m0, m);
+    const int n0 = adjust_vec_size(matmul_kernel_info.n0, n);
+
+    // Make M and N multiple of M0 and N0 respectively
+    const unsigned int ceil_to_multiple_n_n0 = ceil_to_multiple(n, n0);
+    const unsigned int ceil_to_multiple_m_m0 = ceil_to_multiple(m, m0);
+
+    // Divide M and N by M0 and N0 respectively
+    const unsigned int n_div_n0 = ceil_to_multiple_n_n0 / n0;
+    const unsigned int m_div_m0 = ceil_to_multiple_m_m0 / m0;
+
+    // Make n_div_n0 and m_div_m0 multiple of mmul_n0 and mmul_m0 respectively
+    const unsigned int ceil_to_multiple_n_div_n0_mmul_n0 = ceil_to_multiple(n_div_n0, mmul_n0);
+    const unsigned int ceil_to_multiple_m_div_m0_mmul_m0 = ceil_to_multiple(m_div_m0, mmul_m0);
+
+    // Ensure x_dimension is multiple of MMUL block size (mmul_m0 * mmul_n0)
+    x_dimension.set_end(ceil_to_multiple_n_div_n0_mmul_n0 * mmul_m0);
+    y_dimension.set_end(ceil_to_multiple_m_div_m0_mmul_m0 / mmul_m0);
+
+    collapsed.set(Window::DimX, x_dimension);
+    collapsed.set(Window::DimY, y_dimension);
+
+    return std::make_pair(Status{}, collapsed);
+}
+
+} // namespace kernels
+} // namespace opencl
+} // namespace arm_compute
diff --git a/src/gpu/cl/kernels/helpers/MatMulKernelHelpers.h b/src/gpu/cl/kernels/helpers/MatMulKernelHelpers.h
new file mode 100644
index 0000000000..210f22b109
--- /dev/null
+++ b/src/gpu/cl/kernels/helpers/MatMulKernelHelpers.h
@@ -0,0 +1,68 @@
+/*
+ * Copyright (c) 2023 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.
+ */
+
+#ifndef ACL_SRC_GPU_CL_KERNELS_HELPERS_MATMULKERNELHELPERS_H
+#define ACL_SRC_GPU_CL_KERNELS_HELPERS_MATMULKERNELHELPERS_H
+
+#include "arm_compute/core/Error.h"
+#include "arm_compute/core/KernelDescriptors.h"
+#include "arm_compute/core/TensorShape.h"
+#include "arm_compute/core/Window.h"
+
+namespace arm_compute
+{
+namespace opencl
+{
+namespace kernels
+{
+/** Validate the input shapes of Matmul operation
+ *
+ * @param[in] lhs_shape          Lhs tensor shape
+ * @param[in] rhs_shape          Rhs tensor shape
+ * @param[in] matmul_kernel_info Matmul kernel info
+ *
+ * @return true if the shapes and matmul kernel info matches
+ */
+Status validate_matmul_input_shapes(const TensorShape &lhs_shape, const TensorShape &rhs_shape,
+                                    const MatMulKernelInfo &matmul_kernel_info);
+
+/** Validate and configure window for Matmul MMUL kernels
+ *
+ * @param[in] lhs                Lhs tensor info
+ * @param[in] rhs                Rhs tensor info
+ * @param[in] dst                Dst tensor info
+ * @param[in] matmul_kernel_info Matmul kernel info
+ * @param[in] mmul_m0            Number of rows in the MMUL block
+ * @param[in] mmul_n0            Number of columns in the MMUL block
+ *
+ * @return a pair of Status and Window object
+ */
+std::pair<Status, Window> validate_and_configure_window_for_mmul_kernels(const ITensorInfo *lhs,
+                                                                         const ITensorInfo *rhs, const ITensorInfo *dst, const MatMulKernelInfo &matmul_kernel_info,
+                                                                         int mmul_m0, int mmul_n0);
+} // namespace kernels
+} // namespace opencl
+} // namespace arm_compute
+
+#endif // ACL_SRC_GPU_CL_KERNELS_HELPERS_MATMULKERNELHELPERS_H