IVGCVSW-6940 ConstTensorsAsInput: DepthwiseConvolution2d - Complete ACL

  * Added backend specific optimization & test for CpuAcc and GpuAcc: PermuteDepthwiseConv2dWeights

Signed-off-by: Cathal Corbett <cathal.corbett@arm.com>
Change-Id: I600476b2e9c557a39818a574c1091c9d650b21b1

1 files changed, 23 insertions, 0 deletions

diff --git a/src/backends/aclCommon/ArmComputeTensorUtils.cpp b/src/backends/aclCommon/ArmComputeTensorUtils.cpp
index e476eb38a1..1960332ccf 100644
--- a/src/backends/aclCommon/ArmComputeTensorUtils.cpp
+++ b/src/backends/aclCommon/ArmComputeTensorUtils.cpp
@@ -8,6 +8,8 @@
 #include "armnn/Exceptions.hpp"
 #include <armnn/Descriptors.hpp>
 
+#include <fmt/format.h>
+
 namespace armnn
 {
 namespace armcomputetensorutils
@@ -342,5 +344,26 @@ arm_compute::PixelValue GetPixelValue(const arm_compute::ITensorInfo* tensorInfo
     }
 }
 
+unsigned int ComputeDepthwiseConv2dDepthMultiplier(armnn::DataLayout layout,
+                                                   const arm_compute::TensorShape& weightsShape,
+                                                   const arm_compute::TensorShape& inputShape)
+{
+    unsigned int depthMultiplier;
+    if (layout == armnn::DataLayout::NHWC)
+    {
+        depthMultiplier = static_cast<uint32_t>(weightsShape[0]) / static_cast<uint32_t>(inputShape[0]);
+    }
+    else if (layout == armnn::DataLayout::NCHW)
+    {
+        depthMultiplier = static_cast<uint32_t>(weightsShape[2]) / static_cast<uint32_t>(inputShape[2]);
+    }
+    else
+    {
+        throw InvalidArgumentException(fmt::format("Unknown data layout for tensor conversion: {}",
+                                                   GetDataLayoutName(layout)));
+    }
+    return depthMultiplier;
+}
+
 } // namespace armcomputetensorutils
 } // namespace armnn