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<div class="title">TypesUtils.cpp</div> </div>
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<a href="_types_utils_8cpp.xhtml">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">//</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">// Copyright © 2017 Arm Ltd. All rights reserved.</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">// SPDX-License-Identifier: MIT</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">//</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="preprocessor">#include <<a class="code" href="_types_utils_8hpp.xhtml">armnn/TypesUtils.hpp</a>></span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="preprocessor">#include <<a class="code" href="_assert_8hpp.xhtml">armnn/utility/Assert.hpp</a>></span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="preprocessor">#include <<a class="code" href="_numeric_cast_8hpp.xhtml">armnn/utility/NumericCast.hpp</a>></span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> </div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="keyword">namespace</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> {<span class="comment"></span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment">/// Workaround for std:isnan() not being implemented correctly for integral types in MSVC.</span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment">/// https://stackoverflow.com/a/56356405</span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment">/// @{</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"></span>template <typename T, typename std::enable_if<std::is_integral<T>::value, T>::type* = <span class="keyword">nullptr</span>></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="keyword">inline</span> <span class="keywordtype">int</span> IsNan(T x)</div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> {</div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span>  <span class="comment">// The spec defines integral types to be handled as if they were casted to doubles.</span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span>  <span class="keywordflow">return</span> std::isnan(static_cast<double>(x));</div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> }</div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> </div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> template <typename T, typename std::enable_if<!std::is_integral<T>::value, T>::type * = <span class="keyword">nullptr</span>></div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="keyword">inline</span> <span class="keywordtype">int</span> IsNan(T x)</div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> {</div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span>  <span class="keywordflow">return</span> std::isnan(x);</div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> }<span class="comment"></span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment">/// @}</span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment"></span>} <span class="comment">// namespace std</span></div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> </div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="keyword">template</span><<span class="keyword">typename</span> QuantizedType></div><div class="line"><a name="l00030"></a><span class="lineno"><a class="line" href="namespacearmnn.xhtml#ad773a034fb9983e15f3094b4c5c7c30c"> 30</a></span> QuantizedType <a class="code" href="namespacearmnn.xhtml#ad773a034fb9983e15f3094b4c5c7c30c">armnn::Quantize</a>(<span class="keywordtype">float</span> value, <span class="keywordtype">float</span> scale, int32_t offset)</div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> {</div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  static_assert(IsQuantizedType<QuantizedType>(), <span class="stringliteral">"Not an integer type."</span>);</div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  constexpr QuantizedType max = std::numeric_limits<QuantizedType>::max();</div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  constexpr QuantizedType min = std::numeric_limits<QuantizedType>::lowest();</div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  <a class="code" href="_assert_8hpp.xhtml#a5698be69cbd5dfe6c28fcd9867e8cbed">ARMNN_ASSERT</a>(scale != 0.f);</div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  <a class="code" href="_assert_8hpp.xhtml#a5698be69cbd5dfe6c28fcd9867e8cbed">ARMNN_ASSERT</a>(!std::isnan(value));</div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> </div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  <span class="keywordtype">float</span> clampedValue = std::min(std::max(static_cast<float>(round(value/scale) + offset), static_cast<float>(min)),</div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  static_cast<float>(max));</div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  <span class="keyword">auto</span> quantizedBits = <span class="keyword">static_cast<</span>QuantizedType<span class="keyword">></span>(clampedValue);</div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> </div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  <span class="keywordflow">return</span> quantizedBits;</div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> }</div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span> </div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="keyword">template</span> <<span class="keyword">typename</span> QuantizedType></div><div class="line"><a name="l00046"></a><span class="lineno"><a class="line" href="namespacearmnn.xhtml#a855293b1be0581fb61ef6a1c5b027d0f"> 46</a></span> <span class="keywordtype">float</span> <a class="code" href="namespacearmnn.xhtml#a855293b1be0581fb61ef6a1c5b027d0f">armnn::Dequantize</a>(QuantizedType value, <span class="keywordtype">float</span> scale, int32_t offset)</div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span> {</div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  static_assert(IsQuantizedType<QuantizedType>(), <span class="stringliteral">"Not an integer type."</span>);</div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <a class="code" href="_assert_8hpp.xhtml#a5698be69cbd5dfe6c28fcd9867e8cbed">ARMNN_ASSERT</a>(scale != 0.f);</div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <a class="code" href="_assert_8hpp.xhtml#a5698be69cbd5dfe6c28fcd9867e8cbed">ARMNN_ASSERT</a>(!IsNan(value));</div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <span class="keywordflow">return</span> (armnn::numeric_cast<float>(value - offset)) * scale;</div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span> }</div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="comment"></span></div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="comment">/// Explicit specialization of Quantize for int8_t</span></div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="comment"></span><span class="keyword">template</span></div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span> int8_t armnn::Quantize<int8_t>(<span class="keywordtype">float</span> value, <span class="keywordtype">float</span> scale, int32_t offset);</div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="comment"></span></div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="comment">/// Explicit specialization of Quantize for uint8_t</span></div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="comment"></span><span class="keyword">template</span></div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span> uint8_t armnn::Quantize<uint8_t>(<span class="keywordtype">float</span> value, <span class="keywordtype">float</span> scale, int32_t offset);</div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="comment"></span></div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="comment">/// Explicit specialization of Quantize for int16_t</span></div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="comment"></span><span class="keyword">template</span></div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span> int16_t armnn::Quantize<int16_t>(<span class="keywordtype">float</span> value, <span class="keywordtype">float</span> scale, int32_t offset);</div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="comment"></span></div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="comment">/// Explicit specialization of Quantize for int32_t</span></div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="comment"></span><span class="keyword">template</span></div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span> int32_t armnn::Quantize<int32_t>(<span class="keywordtype">float</span> value, <span class="keywordtype">float</span> scale, int32_t offset);</div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="comment"></span></div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="comment">/// Explicit specialization of Dequantize for int8_t</span></div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="comment"></span><span class="keyword">template</span></div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="keywordtype">float</span> armnn::Dequantize<int8_t>(int8_t value, <span class="keywordtype">float</span> scale, int32_t offset);</div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="comment"></span></div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="comment">/// Explicit specialization of Dequantize for uint8_t</span></div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="comment"></span><span class="keyword">template</span></div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="keywordtype">float</span> armnn::Dequantize<uint8_t>(uint8_t value, <span class="keywordtype">float</span> scale, int32_t offset);</div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="comment"></span></div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="comment">/// Explicit specialization of Dequantize for int16_t</span></div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="comment"></span><span class="keyword">template</span></div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span> <span class="keywordtype">float</span> armnn::Dequantize<int16_t>(int16_t value, <span class="keywordtype">float</span> scale, int32_t offset);</div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span> <span class="comment"></span></div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span> <span class="comment">/// Explicit specialization of Dequantize for int32_t</span></div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span> <span class="comment"></span><span class="keyword">template</span></div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span> <span class="keywordtype">float</span> armnn::Dequantize<int32_t>(int32_t value, <span class="keywordtype">float</span> scale, int32_t offset);</div><div class="ttc" id="namespacearmnn_xhtml_a855293b1be0581fb61ef6a1c5b027d0f"><div class="ttname"><a href="namespacearmnn.xhtml#a855293b1be0581fb61ef6a1c5b027d0f">armnn::Dequantize</a></div><div class="ttdeci">float Dequantize(QuantizedType value, float scale, int32_t offset)</div><div class="ttdoc">Dequantize an 8-bit data type into a floating point data type. </div><div class="ttdef"><b>Definition:</b> <a href="_types_utils_8cpp_source.xhtml#l00046">TypesUtils.cpp:46</a></div></div>
<div class="ttc" id="_numeric_cast_8hpp_xhtml"><div class="ttname"><a href="_numeric_cast_8hpp.xhtml">NumericCast.hpp</a></div></div>
<div class="ttc" id="_types_utils_8hpp_xhtml"><div class="ttname"><a href="_types_utils_8hpp.xhtml">TypesUtils.hpp</a></div></div>
<div class="ttc" id="_assert_8hpp_xhtml_a5698be69cbd5dfe6c28fcd9867e8cbed"><div class="ttname"><a href="_assert_8hpp.xhtml#a5698be69cbd5dfe6c28fcd9867e8cbed">ARMNN_ASSERT</a></div><div class="ttdeci">#define ARMNN_ASSERT(COND)</div><div class="ttdef"><b>Definition:</b> <a href="_assert_8hpp_source.xhtml#l00014">Assert.hpp:14</a></div></div>
<div class="ttc" id="namespacearmnn_xhtml_ad773a034fb9983e15f3094b4c5c7c30c"><div class="ttname"><a href="namespacearmnn.xhtml#ad773a034fb9983e15f3094b4c5c7c30c">armnn::Quantize</a></div><div class="ttdeci">QuantizedType Quantize(float value, float scale, int32_t offset)</div><div class="ttdoc">Quantize a floating point data type into an 8-bit data type. </div><div class="ttdef"><b>Definition:</b> <a href="_types_utils_8cpp_source.xhtml#l00030">TypesUtils.cpp:30</a></div></div>
<div class="ttc" id="_assert_8hpp_xhtml"><div class="ttname"><a href="_assert_8hpp.xhtml">Assert.hpp</a></div></div>
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