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<div class="title">TypesUtils.cpp</div> </div>
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<a href="_types_utils_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span>&#160;<span class="comment">// Copyright © 2017 Arm Ltd. All rights reserved.</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span>&#160;<span class="comment">// SPDX-License-Identifier: MIT</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="_types_utils_8hpp.html">armnn/TypesUtils.hpp</a>&gt;</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span>&#160;</div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span>&#160;<span class="preprocessor">#include &lt;boost/assert.hpp&gt;</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span>&#160;<span class="preprocessor">#include &lt;boost/numeric/conversion/cast.hpp&gt;</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160;</div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span>&#160;<span class="keyword">namespace</span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span>&#160;{</div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span>&#160;template &lt;typename T, typename std::enable_if&lt;std::is_integral&lt;T&gt;::value, T&gt;::type* = <span class="keyword">nullptr</span>&gt;</div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160;<span class="keyword">inline</span> <span class="keywordtype">int</span> IsNan(T x)</div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span>&#160;{</div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span>&#160; <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="l00019"></a><span class="lineno"> 19</span>&#160; <span class="keywordflow">return</span> std::isnan(static_cast&lt;double&gt;(x));</div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160;}</div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span>&#160;</div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span>&#160;template &lt;typename T, typename std::enable_if&lt;!std::is_integral&lt;T&gt;::value, T&gt;::type * = <span class="keyword">nullptr</span>&gt;</div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span>&#160;<span class="keyword">inline</span> <span class="keywordtype">int</span> IsNan(T x)</div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160;{</div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span>&#160; <span class="keywordflow">return</span> std::isnan(x);</div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span>&#160;}</div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160;} <span class="comment">// namespace std</span></div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160;</div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160;<span class="keyword">template</span>&lt;<span class="keyword">typename</span> QuantizedType&gt;</div><div class="line"><a name="l00031"></a><span class="lineno"><a class="line" href="namespacearmnn.html#ad773a034fb9983e15f3094b4c5c7c30c"> 31</a></span>&#160;QuantizedType <a class="code" href="namespacearmnn.html#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="l00032"></a><span class="lineno"> 32</span>&#160;{</div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span>&#160; static_assert(IsQuantizedType&lt;QuantizedType&gt;(), <span class="stringliteral">&quot;Not an integer type.&quot;</span>);</div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span>&#160; constexpr QuantizedType max = std::numeric_limits&lt;QuantizedType&gt;::max();</div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160; constexpr QuantizedType min = std::numeric_limits&lt;QuantizedType&gt;::lowest();</div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160; BOOST_ASSERT(scale != 0.f);</div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span>&#160; BOOST_ASSERT(!std::isnan(value));</div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span>&#160;</div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span>&#160; <span class="keywordtype">float</span> clampedValue = std::min(std::max(static_cast&lt;float&gt;(round(value/scale) + offset), static_cast&lt;float&gt;(min)),</div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span>&#160; static_cast&lt;float&gt;(max));</div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160; <span class="keyword">auto</span> quantizedBits = <span class="keyword">static_cast&lt;</span>QuantizedType<span class="keyword">&gt;</span>(clampedValue);</div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160;</div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span>&#160; <span class="keywordflow">return</span> quantizedBits;</div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160;}</div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span>&#160;</div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> QuantizedType&gt;</div><div class="line"><a name="l00047"></a><span class="lineno"><a class="line" href="namespacearmnn.html#a855293b1be0581fb61ef6a1c5b027d0f"> 47</a></span>&#160;<span class="keywordtype">float</span> <a class="code" href="namespacearmnn.html#a855293b1be0581fb61ef6a1c5b027d0f">armnn::Dequantize</a>(QuantizedType value, <span class="keywordtype">float</span> scale, int32_t offset)</div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span>&#160;{</div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160; static_assert(IsQuantizedType&lt;QuantizedType&gt;(), <span class="stringliteral">&quot;Not an integer type.&quot;</span>);</div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span>&#160; BOOST_ASSERT(scale != 0.f);</div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160; BOOST_ASSERT(!IsNan(value));</div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span>&#160; <span class="keywordtype">float</span> dequantized = boost::numeric_cast&lt;<span class="keywordtype">float</span>&gt;(value - offset) * scale;</div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160; <span class="keywordflow">return</span> dequantized;</div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span>&#160;}</div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span>&#160;</div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160;<span class="keyword">template</span></div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span>&#160;int8_t armnn::Quantize&lt;int8_t&gt;(<span class="keywordtype">float</span> value, <span class="keywordtype">float</span> scale, int32_t offset);</div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span>&#160;</div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>&#160;<span class="keyword">template</span></div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160;uint8_t armnn::Quantize&lt;uint8_t&gt;(<span class="keywordtype">float</span> value, <span class="keywordtype">float</span> scale, int32_t offset);</div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160;</div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160;<span class="keyword">template</span></div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160;int16_t armnn::Quantize&lt;int16_t&gt;(<span class="keywordtype">float</span> value, <span class="keywordtype">float</span> scale, int32_t offset);</div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160;</div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160;<span class="keyword">template</span></div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>&#160;int32_t armnn::Quantize&lt;int32_t&gt;(<span class="keywordtype">float</span> value, <span class="keywordtype">float</span> scale, int32_t offset);</div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160;</div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span>&#160;<span class="keyword">template</span></div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span>&#160;<span class="keywordtype">float</span> armnn::Dequantize&lt;int8_t&gt;(int8_t value, <span class="keywordtype">float</span> scale, int32_t offset);</div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span>&#160;</div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160;<span class="keyword">template</span></div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160;<span class="keywordtype">float</span> armnn::Dequantize&lt;uint8_t&gt;(uint8_t value, <span class="keywordtype">float</span> scale, int32_t offset);</div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span>&#160;</div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>&#160;<span class="keyword">template</span></div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span>&#160;<span class="keywordtype">float</span> armnn::Dequantize&lt;int16_t&gt;(int16_t value, <span class="keywordtype">float</span> scale, int32_t offset);</div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span>&#160;</div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span>&#160;<span class="keyword">template</span></div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160;<span class="keywordtype">float</span> armnn::Dequantize&lt;int32_t&gt;(int32_t value, <span class="keywordtype">float</span> scale, int32_t offset);</div><div class="ttc" id="namespacearmnn_html_ad773a034fb9983e15f3094b4c5c7c30c"><div class="ttname"><a href="namespacearmnn.html#ad773a034fb9983e15f3094b4c5c7c30c">armnn::Quantize</a></div><div class="ttdeci">QuantizedType Quantize(float value, float scale, int32_t offset)</div><div class="ttdoc">Explicit specialization of Quantize for int8_t. </div><div class="ttdef"><b>Definition:</b> <a href="_types_utils_8cpp_source.html#l00031">TypesUtils.cpp:31</a></div></div>
<div class="ttc" id="_types_utils_8hpp_html"><div class="ttname"><a href="_types_utils_8hpp.html">TypesUtils.hpp</a></div></div>
<div class="ttc" id="namespacearmnn_html_a855293b1be0581fb61ef6a1c5b027d0f"><div class="ttname"><a href="namespacearmnn.html#a855293b1be0581fb61ef6a1c5b027d0f">armnn::Dequantize</a></div><div class="ttdeci">float Dequantize(QuantizedType value, float scale, int32_t offset)</div><div class="ttdef"><b>Definition:</b> <a href="_types_utils_8cpp_source.html#l00047">TypesUtils.cpp:47</a></div></div>
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