1 files changed, 132 insertions, 0 deletions
diff --git a/include/armnnUtils/QuantizeHelper.hpp b/include/armnnUtils/QuantizeHelper.hpp
new file mode 100644
index 0000000000..231b8411cb
--- /dev/null
+++ b/include/armnnUtils/QuantizeHelper.hpp
@@ -0,0 +1,132 @@
+//
+// Copyright © 2017 Arm Ltd. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+
+#pragma once
+
+#include <armnn/utility/IgnoreUnused.hpp>
+#include <armnn/utility/NumericCast.hpp>
+#include <armnn/TypesUtils.hpp>
+
+#include <BFloat16.hpp>
+#include <Half.hpp>
+
+#include <initializer_list>
+#include <iterator>
+#include <vector>
+
+namespace armnnUtils
+{
+
+template<typename T, bool DoQuantize=true>
+struct SelectiveQuantizer
+{
+    static T Quantize(float value, float scale, int32_t offset)
+    {
+        return armnn::Quantize<T>(value, scale, offset);
+    }
+
+    static float Dequantize(T value, float scale, int32_t offset)
+    {
+        return armnn::Dequantize(value, scale, offset);
+    }
+};
+
+template<typename T>
+struct SelectiveQuantizer<T, false>
+{
+    static T Quantize(float value, float scale, int32_t offset)
+    {
+        armnn::IgnoreUnused(scale, offset);
+        return value;
+    }
+
+    static float Dequantize(T value, float scale, int32_t offset)
+    {
+        armnn::IgnoreUnused(scale, offset);
+        return value;
+    }
+};
+
+template<>
+struct SelectiveQuantizer<armnn::Half, false>
+{
+    static armnn::Half Quantize(float value, float scale, int32_t offset)
+    {
+        armnn::IgnoreUnused(scale, offset);
+        return armnn::Half(value);
+    }
+
+    static float Dequantize(armnn::Half value, float scale, int32_t offset)
+    {
+        armnn::IgnoreUnused(scale, offset);
+        return value;
+    }
+};
+
+template<>
+struct SelectiveQuantizer<armnn::BFloat16, false>
+{
+    static armnn::BFloat16 Quantize(float value, float scale, int32_t offset)
+    {
+        armnn::IgnoreUnused(scale, offset);
+        return armnn::BFloat16(value);
+    }
+
+    static float Dequantize(armnn::BFloat16 value, float scale, int32_t offset)
+    {
+        armnn::IgnoreUnused(scale, offset);
+        return value;
+    }
+};
+
+template<typename T>
+T SelectiveQuantize(float value, float scale, int32_t offset)
+{
+    return SelectiveQuantizer<T, armnn::IsQuantizedType<T>()>::Quantize(value, scale, offset);
+};
+
+template<typename T>
+float SelectiveDequantize(T value, float scale, int32_t offset)
+{
+    return SelectiveQuantizer<T, armnn::IsQuantizedType<T>()>::Dequantize(value, scale, offset);
+};
+
+template<typename ItType>
+struct IsFloatingPointIterator
+{
+    static constexpr bool value=std::is_floating_point<typename std::iterator_traits<ItType>::value_type>::value;
+};
+
+template <typename T, typename FloatIt,
+typename std::enable_if<IsFloatingPointIterator<FloatIt>::value, int>::type=0 // Makes sure fp iterator is valid.
+>
+std::vector<T> QuantizedVector(FloatIt first, FloatIt last, float qScale, int32_t qOffset)
+{
+    std::vector<T> quantized;
+    quantized.reserve(armnn::numeric_cast<size_t>(std::distance(first, last)));
+
+    for (auto it = first; it != last; ++it)
+    {
+        auto f = *it;
+        T q = SelectiveQuantize<T>(f, qScale, qOffset);
+        quantized.push_back(q);
+    }
+
+    return quantized;
+}
+
+template<typename T>
+std::vector<T> QuantizedVector(const std::vector<float>& array, float qScale = 1.f, int32_t qOffset = 0)
+{
+    return QuantizedVector<T>(array.begin(), array.end(), qScale, qOffset);
+}
+
+template<typename T>
+std::vector<T> QuantizedVector(std::initializer_list<float> array, float qScale = 1.f, int32_t qOffset = 0)
+{
+    return QuantizedVector<T>(array.begin(), array.end(), qScale, qOffset);
+}
+
+} // namespace armnnUtils