From 4fcda0101ec3d110c1d6d7bee5c83416b645528a Mon Sep 17 00:00:00 2001
From: telsoa01 <telmo.soares@arm.com>
Date: Fri, 9 Mar 2018 14:13:49 +0000
Subject: Release 18.02

Change-Id: Id3c11dc5ee94ef664374a988fcc6901e9a232fa6
---
 include/armnn/TypesUtils.hpp | 182 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 182 insertions(+)
 create mode 100644 include/armnn/TypesUtils.hpp

(limited to 'include/armnn/TypesUtils.hpp')

diff --git a/include/armnn/TypesUtils.hpp b/include/armnn/TypesUtils.hpp
new file mode 100644
index 0000000000..a851b66b28
--- /dev/null
+++ b/include/armnn/TypesUtils.hpp
@@ -0,0 +1,182 @@
+//
+// Copyright © 2017 Arm Ltd. All rights reserved.
+// See LICENSE file in the project root for full license information.
+//
+#pragma once
+
+#include "Types.hpp"
+#include <cmath>
+#include <ostream>
+#include <boost/assert.hpp>
+#include <boost/numeric/conversion/cast.hpp>
+
+namespace armnn
+{
+
+constexpr char const* GetStatusAsCString(Status compute)
+{
+    switch (compute)
+    {
+        case armnn::Status::Success: return "Status::Success";
+        case armnn::Status::Failure: return "Status::Failure";
+        default:                     return "Unknown";
+    }
+}
+
+constexpr char const* GetComputeDeviceAsCString(Compute compute)
+{
+    switch (compute)
+    {
+        case armnn::Compute::CpuRef: return "CpuRef";
+        case armnn::Compute::CpuAcc: return "CpuAcc";
+        case armnn::Compute::GpuAcc: return "GpuAcc";
+        default:                     return "Unknown";
+    }
+}
+
+constexpr unsigned int GetDataTypeSize(DataType dataType)
+{
+    switch (dataType)
+    {
+        case DataType::Signed32:
+        case DataType::Float32:   return 4U;
+        case DataType::QuantisedAsymm8: return 1U;
+        default:                  return 0U;
+    }
+}
+
+template <int N>
+constexpr bool StrEqual(const char* strA, const char (&strB)[N])
+{
+    bool isEqual = true;
+    for (int i = 0; isEqual && (i < N); ++i)
+    {
+        isEqual = (strA[i] == strB[i]);
+    }
+    return isEqual;
+}
+
+constexpr Compute ParseComputeDevice(const char* str)
+{
+    if (StrEqual(str, "CpuAcc"))
+    {
+        return armnn::Compute::CpuAcc;
+    }
+    else if (StrEqual(str, "CpuRef"))
+    {
+        return armnn::Compute::CpuRef;
+    }
+    else if (StrEqual(str, "GpuAcc"))
+    {
+        return armnn::Compute::GpuAcc;
+    }
+    else
+    {
+        return armnn::Compute::Undefined;
+    }
+}
+
+constexpr const char* GetDataTypeName(DataType dataType)
+{
+    switch (dataType)
+    {
+        case DataType::Float32:   return "Float32";
+        case DataType::QuantisedAsymm8: return "Unsigned8";
+        case DataType::Signed32:  return "Signed32";
+        default:                  return "Unknown";
+    }
+}
+
+template <typename T>
+constexpr DataType GetDataType();
+
+template <>
+constexpr DataType GetDataType<float>()
+{
+    return DataType::Float32;
+}
+
+template <>
+constexpr DataType GetDataType<uint8_t>()
+{
+    return DataType::QuantisedAsymm8;
+}
+
+template <>
+constexpr DataType GetDataType<int32_t>()
+{
+    return DataType::Signed32;
+}
+
+template<typename T>
+constexpr bool IsQuantizedType()
+{
+    return std::is_integral<T>::value;
+}
+
+
+template<DataType DT>
+struct ResolveTypeImpl;
+
+template<>
+struct ResolveTypeImpl<DataType::QuantisedAsymm8>
+{
+    using Type = uint8_t;
+};
+
+template<>
+struct ResolveTypeImpl<DataType::Float32>
+{
+    using Type = float;
+};
+
+template<DataType DT>
+using ResolveType = typename ResolveTypeImpl<DT>::Type;
+
+
+inline std::ostream& operator<<(std::ostream& os, Status stat)
+{
+    os << GetStatusAsCString(stat);
+    return os;
+}
+
+inline std::ostream& operator<<(std::ostream& os, Compute compute)
+{
+    os << GetComputeDeviceAsCString(compute);
+    return os;
+}
+
+/// Quantize a floating point data type into an 8-bit data type
+/// @param value The value to quantize
+/// @param scale The scale (must be non-zero)
+/// @param offset The offset
+/// @return The quantized value calculated as round(value/scale)+offset
+///
+template<typename QuantizedType>
+inline QuantizedType Quantize(float value, float scale, int32_t offset)
+{
+    static_assert(IsQuantizedType<QuantizedType>(), "Not an integer type.");
+    constexpr QuantizedType max = std::numeric_limits<QuantizedType>::max();
+    constexpr QuantizedType min = std::numeric_limits<QuantizedType>::lowest();
+    BOOST_ASSERT(scale != 0.f);
+    int quantized = boost::numeric_cast<int>(round(value / scale)) + offset;
+    QuantizedType quantizedBits = quantized < min ? min : quantized > max ? max : static_cast<QuantizedType>(quantized);
+    return quantizedBits;
+}
+
+/// Dequantize an 8-bit data type into a floating point data type
+/// @param value The value to dequantize
+/// @param scale The scale (must be non-zero)
+/// @param offset The offset
+/// @return The dequantized value calculated as (value-offset)*scale
+///
+template <typename QuantizedType>
+inline float Dequantize(QuantizedType value, float scale, int32_t offset)
+{
+    static_assert(IsQuantizedType<QuantizedType>(), "Not an integer type.");
+    BOOST_ASSERT(scale != 0.f);
+    float dequantized = boost::numeric_cast<float>(value - offset) * scale;
+    return dequantized;
+}
+
+} //namespace armnn
\ No newline at end of file
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