From fa6544e44628f202cef140467079faf0be9d306e Mon Sep 17 00:00:00 2001
From: Aron Virginas-Tar <Aron.Virginas-Tar@arm.com>
Date: Tue, 10 Sep 2019 14:42:22 +0100
Subject: IVGCVSW-3832 Implement ConvertRsqt() method in 1.2/HalPolicy.cpp

Signed-off-by: Aron Virginas-Tar <Aron.Virginas-Tar@arm.com>
Change-Id: I1baf88f15c9bdcffd38e910070c97909b7f913b3
---
 1.2/HalPolicy.cpp | 44 ++++++++++++++++++++++++++++++++++++++++++++
 1.2/HalPolicy.hpp |  2 ++
 2 files changed, 46 insertions(+)

diff --git a/1.2/HalPolicy.cpp b/1.2/HalPolicy.cpp
index 40dd55de..1de57e5a 100644
--- a/1.2/HalPolicy.cpp
+++ b/1.2/HalPolicy.cpp
@@ -85,6 +85,8 @@ bool HalPolicy::ConvertOperation(const Operation& operation, const Model& model,
             return ConvertResize(operation, model, data, armnn::ResizeMethod::Bilinear);
         case V1_2::OperationType::RESIZE_NEAREST_NEIGHBOR:
             return ConvertResize(operation, model, data, armnn::ResizeMethod::NearestNeighbor);
+        case V1_2::OperationType::RSQRT:
+            return ConvertRsqrt(operation, model, data);
         case V1_2::OperationType::SQRT:
             return ConvertSqrt(operation, model, data);
         case V1_2::OperationType::SQUEEZE:
@@ -1172,6 +1174,48 @@ bool HalPolicy::ConvertResize(const Operation& operation,
     return SetupAndTrackLayerOutputSlot<hal_1_2::HalPolicy>(operation, 0, *layer, model, data);
 }
 
+bool HalPolicy::ConvertRsqrt(const Operation& operation, const Model& model, ConversionData& data)
+{
+    ALOGV("hal_1_2::HalPolicy::ConvertRsqrt()");
+
+    LayerInputHandle input = ConvertToLayerInputHandle<hal_1_2::HalPolicy>(operation, 0, model, data);
+    if (!input.IsValid())
+    {
+        return Fail("%s: Operation has invalid input", __func__);
+    }
+
+    const Operand* output = GetOutputOperand<hal_1_2::HalPolicy>(operation, 0, model);
+    if (!output)
+    {
+        return Fail("%s: Could not read output 0", __func__);
+    }
+
+    const armnn::TensorInfo& outputInfo = GetTensorInfoForOperand(*output);
+    if (IsDynamicTensor(outputInfo))
+    {
+        return Fail("%s: Dynamic output tensors are not supported", __func__);
+    }
+
+    bool isSupported = false;
+    FORWARD_LAYER_SUPPORT_FUNC(__func__,
+                               IsRsqrtSupported,
+                               data.m_Backends,
+                               isSupported,
+                               input.GetTensorInfo(),
+                               outputInfo);
+
+    if (!isSupported)
+    {
+        return false;
+    }
+
+    armnn::IConnectableLayer* const layer = data.m_Network->AddRsqrtLayer();
+    assert(layer != nullptr);
+    input.Connect(layer->GetInputSlot(0));
+
+    return SetupAndTrackLayerOutputSlot<hal_1_2::HalPolicy>(operation, 0, *layer, model, data);
+}
+
 bool HalPolicy::ConvertSpaceToBatchNd(const Operation& operation, const Model& model, ConversionData& data)
 {
     ALOGV("hal_1_2::HalPolicy::ConvertSpaceToBatchNd()");
diff --git a/1.2/HalPolicy.hpp b/1.2/HalPolicy.hpp
index f021a09c..e3d39702 100644
--- a/1.2/HalPolicy.hpp
+++ b/1.2/HalPolicy.hpp
@@ -98,6 +98,8 @@ private:
                               ConversionData& data,
                               armnn::ResizeMethod resizeMethod);
 
+    static bool ConvertRsqrt(const Operation& operation, const Model& model, ConversionData& data);
+
     static bool ConvertSoftmax(const Operation& operation, const Model& model, ConversionData& data);
 
     static bool ConvertSpaceToBatchNd(const Operation& operation, const Model& model, ConversionData& data);
-- 
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