1 files changed, 127 insertions, 0 deletions
diff --git a/src/core/CL/DefaultLWSHeuristics.cpp b/src/core/CL/DefaultLWSHeuristics.cpp
new file mode 100644
index 0000000000..f96b24d2a9
--- /dev/null
+++ b/src/core/CL/DefaultLWSHeuristics.cpp
@@ -0,0 +1,127 @@
+/*
+ * Copyright (c) 2021-2022 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/core/CL/DefaultLWSHeuristics.h"
+
+#include "arm_compute/core/CL/CLKernelLibrary.h"
+
+namespace
+{
+cl::NDRange get_gemm_lws(size_t gws_x, size_t gws_y, size_t gws_z)
+{
+    ARM_COMPUTE_UNUSED(gws_y);
+
+    if (gws_z != 1)
+    {
+        return cl::NDRange(4, 4, 2);
+    }
+    else
+    {
+        if (gws_x > 256)
+        {
+            return cl::NDRange(2, 16, 1);
+        }
+        else
+        {
+            return cl::NDRange(32, 4, 1);
+        }
+    }
+}
+
+cl::NDRange get_winograd_lws(size_t gws_x, size_t gws_y, size_t gws_z)
+{
+    ARM_COMPUTE_UNUSED(gws_x, gws_y, gws_z);
+
+    return cl::NDRange(4, 2, 1);
+}
+
+cl::NDRange get_direct_lws(size_t gws_x, size_t gws_y, size_t gws_z)
+{
+    ARM_COMPUTE_UNUSED(gws_z);
+
+    if (gws_x < gws_y)
+    {
+        if (gws_x < 4)
+        {
+            return cl::NDRange(std::min(gws_x, static_cast<size_t>(2u)), 32, 1);
+        }
+        else
+        {
+            return cl::NDRange(std::min(gws_x, static_cast<size_t>(4u)), 8, 1);
+        }
+    }
+    else
+    {
+        return cl::NDRange(8, 4, 1);
+    }
+}
+
+cl::NDRange get_dwc_lws(size_t gws_x, size_t gws_y, size_t gws_z)
+{
+    ARM_COMPUTE_UNUSED(gws_y);
+    ARM_COMPUTE_UNUSED(gws_z);
+
+    if (gws_x < 32)
+    {
+        return cl::NDRange(gws_x, 4, 4);
+    }
+    else
+    {
+        return cl::NDRange(8, 4, 2);
+    }
+}
+} // namespace
+
+namespace arm_compute
+{
+cl::NDRange get_default_lws_for_type(CLKernelType kernel_type, cl::NDRange gws)
+{
+    const size_t gws_x = gws[0];
+    const size_t gws_y = gws[1];
+    const size_t gws_z = gws[2];
+
+    switch (kernel_type)
+    {
+        case CLKernelType::GEMM:
+        {
+            return get_gemm_lws(gws_x, gws_y, gws_z);
+        }
+        case CLKernelType::DIRECT:
+        {
+            return get_direct_lws(gws_x, gws_y, gws_z);
+        }
+        case CLKernelType::WINOGRAD:
+        {
+            return get_winograd_lws(gws_x, gws_y, gws_z);
+        }
+        case CLKernelType::DEPTHWISE:
+        {
+            return get_dwc_lws(gws_x, gws_y, gws_z);
+        }
+        default:
+        {
+            return CLKernelLibrary::get().default_ndrange();
+        }
+    }
+}
+} // namespace arm_compute