IVGCVSW-2861 Refactor the Reference Elementwise workload

 * Refactor Reference Comparison workload
 * Removed templating based on the DataType
 * Implemented BaseIterator to do decode/encode

Change-Id: I18f299f47ee23772f90152c1146b42f07465e105
Signed-off-by: Sadik Armagan <sadik.armagan@arm.com>
Signed-off-by: Kevin May <kevin.may@arm.com>

1 files changed, 155 insertions, 0 deletions

diff --git a/src/backends/reference/workloads/BaseIterator.hpp b/src/backends/reference/workloads/BaseIterator.hpp
new file mode 100644
index 0000000000..cfa8ce7e91
--- /dev/null
+++ b/src/backends/reference/workloads/BaseIterator.hpp
@@ -0,0 +1,155 @@
+//
+// Copyright © 2017 Arm Ltd. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+
+#pragma once
+
+#include <armnn/ArmNN.hpp>
+#include <TypeUtils.hpp>
+
+namespace armnn
+{
+
+class BaseIterator
+{
+public:
+    BaseIterator() {}
+
+    virtual ~BaseIterator() {}
+
+    virtual BaseIterator& operator++() = 0;
+
+    virtual BaseIterator& operator+=(const unsigned int increment) = 0;
+
+    virtual BaseIterator& operator-=(const unsigned int increment) = 0;
+};
+
+class Decoder : public BaseIterator
+{
+public:
+    Decoder() : BaseIterator() {}
+
+    virtual ~Decoder() {}
+
+    virtual float Get() const = 0;
+};
+
+class Encoder : public BaseIterator
+{
+public:
+    Encoder() : BaseIterator() {}
+
+    virtual ~Encoder() {}
+
+    virtual void Set(const float& right) = 0;
+};
+
+class ComparisonEncoder : public BaseIterator
+{
+public:
+    ComparisonEncoder() : BaseIterator() {}
+
+    virtual ~ComparisonEncoder() {}
+
+    virtual void Set(bool right) = 0;
+};
+
+template<typename T, typename Base>
+class TypedIterator : public Base
+{
+public:
+    TypedIterator(T* data)
+        : m_Iterator(data)
+    {}
+
+    TypedIterator& operator++() override
+    {
+        ++m_Iterator;
+        return *this;
+    }
+
+    TypedIterator& operator+=(const unsigned int increment) override
+    {
+        m_Iterator += increment;
+        return *this;
+    }
+
+    TypedIterator& operator-=(const unsigned int increment) override
+    {
+        m_Iterator -= increment;
+        return *this;
+    }
+
+    T* m_Iterator;
+};
+
+class QASymm8Decoder : public TypedIterator<const uint8_t, Decoder>
+{
+public:
+    QASymm8Decoder(const uint8_t* data, const float scale, const int32_t offset)
+        : TypedIterator(data), m_Scale(scale), m_Offset(offset) {}
+
+    float Get() const override
+    {
+        return armnn::Dequantize(*m_Iterator, m_Scale, m_Offset);
+    }
+
+private:
+    const float m_Scale;
+    const int32_t m_Offset;
+};
+
+class FloatDecoder : public TypedIterator<const float, Decoder>
+{
+public:
+    FloatDecoder(const float* data)
+        : TypedIterator(data) {}
+
+    float Get() const override
+    {
+        return *m_Iterator;
+    }
+};
+
+class FloatEncoder : public TypedIterator<float, Encoder>
+{
+public:
+    FloatEncoder(float* data)
+        : TypedIterator(data) {}
+
+    void Set(const float& right) override
+    {
+        *m_Iterator = right;
+    }
+};
+
+class QASymm8Encoder : public TypedIterator<uint8_t, Encoder>
+{
+public:
+    QASymm8Encoder(uint8_t* data, const float scale, const int32_t offset)
+        : TypedIterator(data), m_Scale(scale), m_Offset(offset) {}
+
+    void Set(const float& right) override
+    {
+        *m_Iterator = armnn::Quantize<uint8_t>(right, m_Scale, m_Offset);
+    }
+
+private:
+    const float m_Scale;
+    const int32_t m_Offset;
+};
+
+class BooleanEncoder : public TypedIterator<uint8_t, ComparisonEncoder>
+{
+public:
+    BooleanEncoder(uint8_t* data)
+        : TypedIterator(data) {}
+
+    void Set(bool right) override
+    {
+        *m_Iterator = right;
+    }
+};
+
+} //namespace armnn
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