diff --git a/arm_compute/core/Window.inl b/arm_compute/core/Window.inl
new file mode 100644
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+++ b/arm_compute/core/Window.inl
@@ -0,0 +1,182 @@
+/*
+ * Copyright (c) 2016, 2017 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.
+ */
+namespace arm_compute
+{
+inline Window::Window(const Window &src)
+    : _dims(), _thread_id(src._thread_id), _num_threads(src._num_threads)
+{
+    for(size_t i = 0; i < Coordinates::num_max_dimensions; ++i)
+    {
+        set(i, src[i]);
+    }
+}
+
+inline constexpr const Window::Dimension &Window::operator[](const size_t dimension) const
+{
+    // Precondition: dimension < Coordinates::num_max_dimensions
+    return _dims.at(dimension);
+}
+inline void Window::set(const size_t dimension, const Window::Dimension &dim)
+{
+    ARM_COMPUTE_ERROR_ON(dimension >= Coordinates::num_max_dimensions);
+    _dims[dimension] = dim;
+}
+
+inline void Window::shift(const size_t dimension, const int shift_value)
+{
+    ARM_COMPUTE_ERROR_ON(dimension >= Coordinates::num_max_dimensions);
+    Window::Dimension &d = _dims[dimension];
+    d                    = Window::Dimension(d.start() + shift_value, d.end() + shift_value, d.step());
+}
+
+inline void Window::adjust(size_t dimension, int adjust_value, bool is_at_start)
+{
+    ARM_COMPUTE_ERROR_ON(dimension >= Coordinates::num_max_dimensions);
+    Window::Dimension &d = _dims[dimension];
+
+    if(is_at_start)
+    {
+        d = Window::Dimension(d.start() + adjust_value, d.end(), d.step());
+    }
+    else
+    {
+        d = Window::Dimension(d.start(), d.end() + adjust_value, d.step());
+    }
+}
+
+inline void Window::scale(const size_t dimension, float scale_value)
+{
+    ARM_COMPUTE_ERROR_ON(dimension >= Coordinates::num_max_dimensions);
+    Window::Dimension &d           = _dims[dimension];
+    const int          scaled_step = d.step() * scale_value;
+    const int          scaled_end  = ceil_to_multiple(d.end() * scale_value, scaled_step);
+    d                              = Window::Dimension(d.start() * scale_value, scaled_end, scaled_step);
+}
+
+inline void Window::set_dimension_step(const size_t dimension, const int step)
+{
+    ARM_COMPUTE_ERROR_ON(dimension >= Coordinates::num_max_dimensions);
+    _dims[dimension].set_step(step);
+}
+
+inline void Window::validate() const
+{
+    for(size_t i = 0; i < Coordinates::num_max_dimensions; ++i)
+    {
+        ARM_COMPUTE_ERROR_ON(_dims[i].step() == 0);
+        ARM_COMPUTE_ERROR_ON(_dims[i].end() <= _dims[i].start());
+        ARM_COMPUTE_ERROR_ON((_dims[i].end() - _dims[i].start()) % _dims[i].step());
+    }
+}
+
+inline constexpr size_t Window::num_iterations(size_t dimension) const
+{
+    // Precondition: dimension < Coordinates::num_max_dimensions
+    // Precondition: (end - start) % step == 0
+    return (_dims.at(dimension).end() - _dims.at(dimension).start()) / _dims.at(dimension).step();
+}
+
+inline Window Window::split_window(const size_t dimension, const size_t id, const size_t total) const
+{
+    ARM_COMPUTE_ERROR_ON(id >= total);
+    ARM_COMPUTE_ERROR_ON(dimension >= Coordinates::num_max_dimensions);
+
+    Window out;
+
+    for(size_t d = 0; d < Coordinates::num_max_dimensions; ++d)
+    {
+        if(d == dimension)
+        {
+            int start          = _dims[d].start();
+            int end            = _dims[d].end();
+            int per_sub_window = (num_iterations(d) / total) * _dims[d].step();
+
+            start += id * per_sub_window;
+
+            if(id != total - 1)
+            {
+                end = start + per_sub_window;
+            }
+
+            out.set(d, Dimension(start, end, _dims[d].step()));
+        }
+        else
+        {
+            out.set(d, _dims[d]);
+        }
+    }
+
+    return out;
+}
+
+template <unsigned int window_dimension>
+inline bool Window::slide_window_slice(Window &slice) const
+{
+    for(unsigned int n = window_dimension; n < Coordinates::num_max_dimensions; ++n)
+    {
+        // Did we reach the end of this dimension?
+        const int v = slice._dims[n].start() + 1;
+
+        if(v < _dims[n].end())
+        {
+            // No: increment
+            slice._dims[n] = Dimension(v, v + 1, 1);
+
+            // Reset lower dimensions:
+            for(unsigned int lower = window_dimension; lower < n; ++lower)
+            {
+                slice._dims[lower] = Dimension(_dims[lower].start(), _dims[lower].start() + 1, 1);
+            }
+            return true;
+        }
+    }
+
+    // It was the last slice
+    return false; // Iteration over
+}
+
+template <unsigned int window_dimension>
+inline Window          Window::first_slice_window() const
+{
+    Window slice;
+
+    std::copy_n(_dims.begin(), window_dimension, slice._dims.begin());
+
+    //Initialise higher dimensions to be the first slice.
+    for(unsigned int n = window_dimension; n < Coordinates::num_max_dimensions; ++n)
+    {
+        slice._dims[n] = Dimension(_dims[n].start(), _dims[n].start() + 1, 1);
+    }
+
+    return slice;
+}
+
+inline void Window::use_tensor_dimensions(const ITensorInfo *info, const size_t first_dimension)
+{
+    for(unsigned int n = first_dimension; n < info->num_dimensions(); ++n)
+    {
+        set(n, Window::Dimension(0, std::max(info->dimension(n), static_cast<size_t>(1))));
+    }
+}
+}