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<div class="title">NetworkQuantizationScheme.hpp</div> </div>
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<a href="_network_quantization_scheme_8hpp.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> </div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="preprocessor">#pragma once</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> </div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="preprocessor">#include <<a class="code" href="_types_8hpp.xhtml">armnn/Types.hpp</a>></span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> </div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#include <cmath></span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="preprocessor">#include <algorithm></span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> </div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="keyword">namespace </span><a class="code" href="namespacearmnn.xhtml">armnn</a></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> {</div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> </div><div class="line"><a name="l00016"></a><span class="lineno"><a class="line" href="namespacearmnn.xhtml#a9b8e5a95f8c061bbbcdb036915dcb61a"> 16</a></span> <span class="keyword">using</span> <a class="code" href="namespacearmnn.xhtml#a9b8e5a95f8c061bbbcdb036915dcb61a">OffsetScalePair</a> = std::pair<float, int>;</div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> </div><div class="line"><a name="l00018"></a><span class="lineno"><a class="line" href="structarmnn_1_1_i_quantization_scheme.xhtml"> 18</a></span> <span class="keyword">struct </span><a class="code" href="structarmnn_1_1_i_quantization_scheme.xhtml">IQuantizationScheme</a></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>  <span class="keyword">virtual</span> <a class="code" href="namespacearmnn.xhtml#a9b8e5a95f8c061bbbcdb036915dcb61a">OffsetScalePair</a> <a class="code" href="structarmnn_1_1_i_quantization_scheme.xhtml#a6a5561395e9693f02258b49dfcc009b4">ComputeScheme</a>(<span class="keywordtype">double</span> min, <span class="keywordtype">double</span> max) <span class="keyword">const</span> = 0;</div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> </div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  <span class="keyword">virtual</span> <span class="keywordtype">int</span> <a class="code" href="structarmnn_1_1_i_quantization_scheme.xhtml#a7ebe7ca1c6100440fcc130217f43561b">NumBits</a>() <span class="keyword">const</span> = 0;</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="keyword">virtual</span> <a class="code" href="namespacearmnn.xhtml#ad8ed01ff3ff33333d8e19db4d2818bb6">DataType</a> <a class="code" href="structarmnn_1_1_i_quantization_scheme.xhtml#ad23181f9f8fcc85758f62c49fc7ca23f">GetDataType</a>() <span class="keyword">const</span> = 0;</div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> </div><div class="line"><a name="l00026"></a><span class="lineno"><a class="line" href="structarmnn_1_1_i_quantization_scheme.xhtml#ac7ce71800ca0ebb1222958717a834c9a"> 26</a></span>  <span class="keyword">virtual</span> <a class="code" href="structarmnn_1_1_i_quantization_scheme.xhtml#ac7ce71800ca0ebb1222958717a834c9a">~IQuantizationScheme</a>() {}</div><div class="line"><a name="l00027"></a><span class="lineno"> 27</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"><a class="line" href="structarmnn_1_1_q_asymm_u8_quantization_scheme.xhtml"> 29</a></span> <span class="keyword">struct </span><a class="code" href="structarmnn_1_1_q_asymm_u8_quantization_scheme.xhtml">QAsymmU8QuantizationScheme</a> : <a class="code" href="structarmnn_1_1_i_quantization_scheme.xhtml">IQuantizationScheme</a></div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> {</div><div class="line"><a name="l00031"></a><span class="lineno"><a class="line" href="structarmnn_1_1_q_asymm_u8_quantization_scheme.xhtml#a9fb07d8d7554a1502e732b8afa92040a"> 31</a></span>  <a class="code" href="namespacearmnn.xhtml#a9b8e5a95f8c061bbbcdb036915dcb61a">OffsetScalePair</a> <a class="code" href="structarmnn_1_1_q_asymm_u8_quantization_scheme.xhtml#a9fb07d8d7554a1502e732b8afa92040a">ComputeScheme</a>(<span class="keywordtype">double</span> min, <span class="keywordtype">double</span> max)<span class="keyword"> const override</span></div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="keyword"> </span>{</div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  <span class="keywordflow">if</span> (min > max)</div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  {</div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  <span class="keywordflow">throw</span> <a class="code" href="classarmnn_1_1_invalid_argument_exception.xhtml">InvalidArgumentException</a>(<span class="stringliteral">"min > max will result in invalid quantization."</span>);</div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  }</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">double</span> highest = (1 << <a class="code" href="structarmnn_1_1_i_quantization_scheme.xhtml#a7ebe7ca1c6100440fcc130217f43561b">NumBits</a>()) - 1;</div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> </div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  min = std::min(0.0, min); <span class="comment">// min <= 0.0</span></div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  max = std::max(0.0, max); <span class="comment">// max >= 0.0</span></div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> </div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <span class="comment">// To avoid dividing by zero when quantizing a zero filled tensor</span></div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <span class="keywordflow">if</span> (min == 0.0 && max == 0.0)</div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  {</div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  max = 1.0;</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> </div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <span class="comment">// Assumes quantization range [0-highest]</span></div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="keywordtype">double</span> scale = (max-min) / highest;</div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <span class="keywordtype">double</span> offset = -min / 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">// Clamp offset [0-highest]</span></div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  offset = std::max(0.0, std::min(highest, offset));</div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span> </div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="keywordflow">return</span> std::make_pair(static_cast<float>(scale), static_cast<int>(std::round(offset)));</div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  }</div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span> </div><div class="line"><a name="l00059"></a><span class="lineno"><a class="line" href="structarmnn_1_1_q_asymm_u8_quantization_scheme.xhtml#a1046eb36ff708a1b84f9a6bf0103fbc7"> 59</a></span>  <span class="keywordtype">int</span> <a class="code" href="structarmnn_1_1_q_asymm_u8_quantization_scheme.xhtml#a1046eb36ff708a1b84f9a6bf0103fbc7">NumBits</a>()<span class="keyword"> const override </span>{ <span class="keywordflow">return</span> 8; }</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span> </div><div class="line"><a name="l00061"></a><span class="lineno"><a class="line" href="structarmnn_1_1_q_asymm_u8_quantization_scheme.xhtml#a57d67416d97cb7138e43656b43feb797"> 61</a></span>  <a class="code" href="namespacearmnn.xhtml#ad8ed01ff3ff33333d8e19db4d2818bb6">DataType</a> <a class="code" href="structarmnn_1_1_q_asymm_u8_quantization_scheme.xhtml#a57d67416d97cb7138e43656b43feb797">GetDataType</a>()<span class="keyword"> const override </span>{ <span class="keywordflow">return</span> <a class="code" href="namespacearmnn.xhtml#ad8ed01ff3ff33333d8e19db4d2818bb6a0a3f57c876f5a230244c38e1453a8a6e">DataType::QAsymmU8</a>; }</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span> };</div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span> </div><div class="line"><a name="l00064"></a><span class="lineno"><a class="line" href="structarmnn_1_1_q_asymm_s8_quantization_scheme.xhtml"> 64</a></span> <span class="keyword">struct </span><a class="code" href="structarmnn_1_1_q_asymm_s8_quantization_scheme.xhtml">QAsymmS8QuantizationScheme</a> : <a class="code" href="structarmnn_1_1_i_quantization_scheme.xhtml">IQuantizationScheme</a></div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span> {</div><div class="line"><a name="l00066"></a><span class="lineno"><a class="line" href="structarmnn_1_1_q_asymm_s8_quantization_scheme.xhtml#a9fb07d8d7554a1502e732b8afa92040a"> 66</a></span>  <a class="code" href="namespacearmnn.xhtml#a9b8e5a95f8c061bbbcdb036915dcb61a">OffsetScalePair</a> <a class="code" href="structarmnn_1_1_q_asymm_s8_quantization_scheme.xhtml#a9fb07d8d7554a1502e732b8afa92040a">ComputeScheme</a>(<span class="keywordtype">double</span> min, <span class="keywordtype">double</span> max)<span class="keyword"> const override</span></div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="keyword"> </span>{</div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <span class="keywordflow">if</span> (min > max)</div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  {</div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <span class="keywordflow">throw</span> <a class="code" href="classarmnn_1_1_invalid_argument_exception.xhtml">InvalidArgumentException</a>(<span class="stringliteral">"min > max will result in invalid quantization."</span>);</div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  }</div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span> </div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <span class="keywordtype">double</span> highest = (1 << <a class="code" href="structarmnn_1_1_i_quantization_scheme.xhtml#a7ebe7ca1c6100440fcc130217f43561b">NumBits</a>()) - 1;</div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span> </div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  min = std::min(0.0, min); <span class="comment">// min <= 0.0</span></div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  max = std::max(0.0, max); <span class="comment">// max >= 0.0</span></div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span> </div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <span class="comment">// To avoid dividing by zero when quantizing a zero filled tensor</span></div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <span class="keywordflow">if</span> (min == 0.0 && max == 0.0)</div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  {</div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  max = 1.0;</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  }</div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span> </div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="comment">// Assumes quantization range [0-255]</span></div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="keywordtype">double</span> scale = (max-min) / highest ;</div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <span class="keywordtype">double</span> offset = - min / scale;</div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span> </div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="comment">//Clamp 0 to Highest</span></div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  offset = std::max(0.0, std::min(highest, offset));</div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span> </div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="comment">//-128 on offset to cast to signed range</span></div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="keywordflow">return</span> std::make_pair(static_cast<float>(scale), static_cast<int>(std::round(offset)-128));</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  }</div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span> </div><div class="line"><a name="l00095"></a><span class="lineno"><a class="line" href="structarmnn_1_1_q_asymm_s8_quantization_scheme.xhtml#a1046eb36ff708a1b84f9a6bf0103fbc7"> 95</a></span>  <span class="keywordtype">int</span> <a class="code" href="structarmnn_1_1_q_asymm_s8_quantization_scheme.xhtml#a1046eb36ff708a1b84f9a6bf0103fbc7">NumBits</a>()<span class="keyword"> const override </span>{ <span class="keywordflow">return</span> 8; }</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span> </div><div class="line"><a name="l00097"></a><span class="lineno"><a class="line" href="structarmnn_1_1_q_asymm_s8_quantization_scheme.xhtml#a57d67416d97cb7138e43656b43feb797"> 97</a></span>  <a class="code" href="namespacearmnn.xhtml#ad8ed01ff3ff33333d8e19db4d2818bb6">DataType</a> <a class="code" href="structarmnn_1_1_q_asymm_s8_quantization_scheme.xhtml#a57d67416d97cb7138e43656b43feb797">GetDataType</a>()<span class="keyword"> const override </span>{ <span class="keywordflow">return</span> <a class="code" href="namespacearmnn.xhtml#ad8ed01ff3ff33333d8e19db4d2818bb6a9d02ea768c081d4bdb2b7cab0b3f510d">DataType::QAsymmS8</a>; }</div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span> };</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span> </div><div class="line"><a name="l00100"></a><span class="lineno"><a class="line" href="structarmnn_1_1_q_symm_s8_quantization_scheme.xhtml"> 100</a></span> <span class="keyword">struct </span><a class="code" href="structarmnn_1_1_q_symm_s8_quantization_scheme.xhtml">QSymmS8QuantizationScheme</a> : <a class="code" href="structarmnn_1_1_i_quantization_scheme.xhtml">IQuantizationScheme</a></div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span> {</div><div class="line"><a name="l00102"></a><span class="lineno"><a class="line" href="structarmnn_1_1_q_symm_s8_quantization_scheme.xhtml#a9fb07d8d7554a1502e732b8afa92040a"> 102</a></span>  <a class="code" href="namespacearmnn.xhtml#a9b8e5a95f8c061bbbcdb036915dcb61a">OffsetScalePair</a> <a class="code" href="structarmnn_1_1_q_symm_s8_quantization_scheme.xhtml#a9fb07d8d7554a1502e732b8afa92040a">ComputeScheme</a>(<span class="keywordtype">double</span> min, <span class="keywordtype">double</span> max)<span class="keyword"> const override</span></div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span> <span class="keyword"> </span>{</div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <span class="keywordflow">if</span> (min > max)</div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  {</div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <span class="keywordflow">throw</span> <a class="code" href="classarmnn_1_1_invalid_argument_exception.xhtml">InvalidArgumentException</a>(<span class="stringliteral">"min > max will result in invalid quantization."</span>);</div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  }</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span> </div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  <span class="comment">// To avoid dividing by zero when quantizing a zero filled tensor</span></div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <span class="keywordflow">if</span> (min == 0.0 && max == 0.0)</div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  {</div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  max = 1.0;</div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  }</div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span> </div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  <span class="keywordtype">double</span> highest = (1 << (<a class="code" href="structarmnn_1_1_i_quantization_scheme.xhtml#a7ebe7ca1c6100440fcc130217f43561b">NumBits</a>()-1)) - 1; <span class="comment">// (numbits-1) accounts for the sign bit</span></div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span> </div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  <span class="keywordtype">double</span> extent = std::max(std::abs(min), std::abs(max));</div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <span class="keywordtype">double</span> scale = extent / highest;</div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span> </div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  <span class="keywordflow">return</span> std::make_pair(static_cast<float>(scale), 0);</div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  }</div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span> </div><div class="line"><a name="l00123"></a><span class="lineno"><a class="line" href="structarmnn_1_1_q_symm_s8_quantization_scheme.xhtml#a1046eb36ff708a1b84f9a6bf0103fbc7"> 123</a></span>  <span class="keywordtype">int</span> <a class="code" href="structarmnn_1_1_q_symm_s8_quantization_scheme.xhtml#a1046eb36ff708a1b84f9a6bf0103fbc7">NumBits</a>()<span class="keyword"> const override </span>{ <span class="keywordflow">return</span> 8; }</div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span> </div><div class="line"><a name="l00125"></a><span class="lineno"><a class="line" href="structarmnn_1_1_q_symm_s8_quantization_scheme.xhtml#a57d67416d97cb7138e43656b43feb797"> 125</a></span>  <a class="code" href="namespacearmnn.xhtml#ad8ed01ff3ff33333d8e19db4d2818bb6">DataType</a> <a class="code" href="structarmnn_1_1_q_symm_s8_quantization_scheme.xhtml#a57d67416d97cb7138e43656b43feb797">GetDataType</a>()<span class="keyword"> const override </span>{ <span class="keywordflow">return</span> <a class="code" href="namespacearmnn.xhtml#ad8ed01ff3ff33333d8e19db4d2818bb6a9945327825b115e93a3b89f4302e76db">DataType::QSymmS8</a>; }</div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span> };</div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span> </div><div class="line"><a name="l00128"></a><span class="lineno"><a class="line" href="structarmnn_1_1_q_symm16_quantization_scheme.xhtml"> 128</a></span> <span class="keyword">struct </span><a class="code" href="structarmnn_1_1_q_symm16_quantization_scheme.xhtml">QSymm16QuantizationScheme</a> : <a class="code" href="structarmnn_1_1_i_quantization_scheme.xhtml">IQuantizationScheme</a></div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span> {</div><div class="line"><a name="l00130"></a><span class="lineno"><a class="line" href="structarmnn_1_1_q_symm16_quantization_scheme.xhtml#a9fb07d8d7554a1502e732b8afa92040a"> 130</a></span>  <a class="code" href="namespacearmnn.xhtml#a9b8e5a95f8c061bbbcdb036915dcb61a">OffsetScalePair</a> <a class="code" href="structarmnn_1_1_q_symm16_quantization_scheme.xhtml#a9fb07d8d7554a1502e732b8afa92040a">ComputeScheme</a>(<span class="keywordtype">double</span> min, <span class="keywordtype">double</span> max)<span class="keyword"> const override</span></div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span> <span class="keyword"> </span>{</div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  <span class="keywordflow">if</span> (min > max)</div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  {</div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  <span class="keywordflow">throw</span> <a class="code" href="classarmnn_1_1_invalid_argument_exception.xhtml">InvalidArgumentException</a>(<span class="stringliteral">"min > max will result in invalid quantization."</span>);</div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  }</div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span> </div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  <span class="comment">// To avoid dividing by zero when quantizing a zero filled tensor</span></div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  <span class="keywordflow">if</span> (min == 0.0 && max == 0.0)</div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  {</div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  max = 1.0;</div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  }</div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span> </div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  <span class="keywordtype">double</span> highest = (1 << (<a class="code" href="structarmnn_1_1_i_quantization_scheme.xhtml#a7ebe7ca1c6100440fcc130217f43561b">NumBits</a>()-1)) - 1; <span class="comment">// (numbits-1) accounts for the sign bit</span></div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span> </div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  <span class="keywordtype">double</span> extent = std::max(std::abs(min), std::abs(max));</div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  <span class="keywordtype">double</span> scale = extent / highest;</div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span> </div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  <span class="keywordflow">return</span> std::make_pair(static_cast<float>(scale), 0);</div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span> </div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  }</div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span> </div><div class="line"><a name="l00152"></a><span class="lineno"><a class="line" href="structarmnn_1_1_q_symm16_quantization_scheme.xhtml#a1046eb36ff708a1b84f9a6bf0103fbc7"> 152</a></span>  <span class="keywordtype">int</span> <a class="code" href="structarmnn_1_1_q_symm16_quantization_scheme.xhtml#a1046eb36ff708a1b84f9a6bf0103fbc7">NumBits</a>()<span class="keyword"> const override </span>{ <span class="keywordflow">return</span> 16; }</div><div class="line"><a name="l00153"></a><span class="lineno"> 153</span> </div><div class="line"><a name="l00154"></a><span class="lineno"><a class="line" href="structarmnn_1_1_q_symm16_quantization_scheme.xhtml#a57d67416d97cb7138e43656b43feb797"> 154</a></span>  <a class="code" href="namespacearmnn.xhtml#ad8ed01ff3ff33333d8e19db4d2818bb6">DataType</a> <a class="code" href="structarmnn_1_1_q_symm16_quantization_scheme.xhtml#a57d67416d97cb7138e43656b43feb797">GetDataType</a>()<span class="keyword"> const override </span>{ <span class="keywordflow">return</span> <a class="code" href="namespacearmnn.xhtml#ad8ed01ff3ff33333d8e19db4d2818bb6a053c769dcf82d66ef326c86980c02ba7">DataType::QSymmS16</a>; }</div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span> };</div><div class="line"><a name="l00156"></a><span class="lineno"> 156</span> </div><div class="line"><a name="l00157"></a><span class="lineno"> 157</span> } <span class="comment">// namespace armnn</span></div><div class="ttc" id="structarmnn_1_1_q_symm_s8_quantization_scheme_xhtml_a1046eb36ff708a1b84f9a6bf0103fbc7"><div class="ttname"><a href="structarmnn_1_1_q_symm_s8_quantization_scheme.xhtml#a1046eb36ff708a1b84f9a6bf0103fbc7">armnn::QSymmS8QuantizationScheme::NumBits</a></div><div class="ttdeci">int NumBits() const override</div><div class="ttdef"><b>Definition:</b> <a href="_network_quantization_scheme_8hpp_source.xhtml#l00123">NetworkQuantizationScheme.hpp:123</a></div></div>
<div class="ttc" id="namespacearmnn_xhtml_a9b8e5a95f8c061bbbcdb036915dcb61a"><div class="ttname"><a href="namespacearmnn.xhtml#a9b8e5a95f8c061bbbcdb036915dcb61a">armnn::OffsetScalePair</a></div><div class="ttdeci">std::pair< float, int > OffsetScalePair</div><div class="ttdef"><b>Definition:</b> <a href="_network_quantization_scheme_8hpp_source.xhtml#l00016">NetworkQuantizationScheme.hpp:16</a></div></div>
<div class="ttc" id="structarmnn_1_1_q_asymm_s8_quantization_scheme_xhtml_a57d67416d97cb7138e43656b43feb797"><div class="ttname"><a href="structarmnn_1_1_q_asymm_s8_quantization_scheme.xhtml#a57d67416d97cb7138e43656b43feb797">armnn::QAsymmS8QuantizationScheme::GetDataType</a></div><div class="ttdeci">DataType GetDataType() const override</div><div class="ttdef"><b>Definition:</b> <a href="_network_quantization_scheme_8hpp_source.xhtml#l00097">NetworkQuantizationScheme.hpp:97</a></div></div>
<div class="ttc" id="structarmnn_1_1_q_asymm_u8_quantization_scheme_xhtml_a57d67416d97cb7138e43656b43feb797"><div class="ttname"><a href="structarmnn_1_1_q_asymm_u8_quantization_scheme.xhtml#a57d67416d97cb7138e43656b43feb797">armnn::QAsymmU8QuantizationScheme::GetDataType</a></div><div class="ttdeci">DataType GetDataType() const override</div><div class="ttdef"><b>Definition:</b> <a href="_network_quantization_scheme_8hpp_source.xhtml#l00061">NetworkQuantizationScheme.hpp:61</a></div></div>
<div class="ttc" id="structarmnn_1_1_q_symm16_quantization_scheme_xhtml"><div class="ttname"><a href="structarmnn_1_1_q_symm16_quantization_scheme.xhtml">armnn::QSymm16QuantizationScheme</a></div><div class="ttdef"><b>Definition:</b> <a href="_network_quantization_scheme_8hpp_source.xhtml#l00128">NetworkQuantizationScheme.hpp:128</a></div></div>
<div class="ttc" id="structarmnn_1_1_q_symm16_quantization_scheme_xhtml_a1046eb36ff708a1b84f9a6bf0103fbc7"><div class="ttname"><a href="structarmnn_1_1_q_symm16_quantization_scheme.xhtml#a1046eb36ff708a1b84f9a6bf0103fbc7">armnn::QSymm16QuantizationScheme::NumBits</a></div><div class="ttdeci">int NumBits() const override</div><div class="ttdef"><b>Definition:</b> <a href="_network_quantization_scheme_8hpp_source.xhtml#l00152">NetworkQuantizationScheme.hpp:152</a></div></div>
<div class="ttc" id="namespacearmnn_xhtml_ad8ed01ff3ff33333d8e19db4d2818bb6a9d02ea768c081d4bdb2b7cab0b3f510d"><div class="ttname"><a href="namespacearmnn.xhtml#ad8ed01ff3ff33333d8e19db4d2818bb6a9d02ea768c081d4bdb2b7cab0b3f510d">armnn::DataType::QAsymmS8</a></div></div>
<div class="ttc" id="namespacearmnn_xhtml_ad8ed01ff3ff33333d8e19db4d2818bb6a053c769dcf82d66ef326c86980c02ba7"><div class="ttname"><a href="namespacearmnn.xhtml#ad8ed01ff3ff33333d8e19db4d2818bb6a053c769dcf82d66ef326c86980c02ba7">armnn::DataType::QSymmS16</a></div></div>
<div class="ttc" id="namespacearmnn_xhtml"><div class="ttname"><a href="namespacearmnn.xhtml">armnn</a></div><div class="ttdoc">Copyright (c) 2021 ARM Limited and Contributors. </div><div class="ttdef"><b>Definition:</b> <a href="01__00__software__tools_8dox_source.xhtml#l00006">01_00_software_tools.dox:6</a></div></div>
<div class="ttc" id="structarmnn_1_1_i_quantization_scheme_xhtml_a6a5561395e9693f02258b49dfcc009b4"><div class="ttname"><a href="structarmnn_1_1_i_quantization_scheme.xhtml#a6a5561395e9693f02258b49dfcc009b4">armnn::IQuantizationScheme::ComputeScheme</a></div><div class="ttdeci">virtual OffsetScalePair ComputeScheme(double min, double max) const =0</div></div>
<div class="ttc" id="structarmnn_1_1_q_asymm_u8_quantization_scheme_xhtml"><div class="ttname"><a href="structarmnn_1_1_q_asymm_u8_quantization_scheme.xhtml">armnn::QAsymmU8QuantizationScheme</a></div><div class="ttdef"><b>Definition:</b> <a href="_network_quantization_scheme_8hpp_source.xhtml#l00029">NetworkQuantizationScheme.hpp:29</a></div></div>
<div class="ttc" id="structarmnn_1_1_q_symm_s8_quantization_scheme_xhtml"><div class="ttname"><a href="structarmnn_1_1_q_symm_s8_quantization_scheme.xhtml">armnn::QSymmS8QuantizationScheme</a></div><div class="ttdef"><b>Definition:</b> <a href="_network_quantization_scheme_8hpp_source.xhtml#l00100">NetworkQuantizationScheme.hpp:100</a></div></div>
<div class="ttc" id="structarmnn_1_1_i_quantization_scheme_xhtml_a7ebe7ca1c6100440fcc130217f43561b"><div class="ttname"><a href="structarmnn_1_1_i_quantization_scheme.xhtml#a7ebe7ca1c6100440fcc130217f43561b">armnn::IQuantizationScheme::NumBits</a></div><div class="ttdeci">virtual int NumBits() const =0</div></div>
<div class="ttc" id="namespacearmnn_xhtml_ad8ed01ff3ff33333d8e19db4d2818bb6"><div class="ttname"><a href="namespacearmnn.xhtml#ad8ed01ff3ff33333d8e19db4d2818bb6">armnn::DataType</a></div><div class="ttdeci">DataType</div><div class="ttdef"><b>Definition:</b> <a href="_types_8hpp_source.xhtml#l00032">Types.hpp:32</a></div></div>
<div class="ttc" id="namespacearmnn_xhtml_ad8ed01ff3ff33333d8e19db4d2818bb6a0a3f57c876f5a230244c38e1453a8a6e"><div class="ttname"><a href="namespacearmnn.xhtml#ad8ed01ff3ff33333d8e19db4d2818bb6a0a3f57c876f5a230244c38e1453a8a6e">armnn::DataType::QAsymmU8</a></div></div>
<div class="ttc" id="_types_8hpp_xhtml"><div class="ttname"><a href="_types_8hpp.xhtml">Types.hpp</a></div></div>
<div class="ttc" id="classarmnn_1_1_invalid_argument_exception_xhtml"><div class="ttname"><a href="classarmnn_1_1_invalid_argument_exception.xhtml">armnn::InvalidArgumentException</a></div><div class="ttdef"><b>Definition:</b> <a href="_exceptions_8hpp_source.xhtml#l00080">Exceptions.hpp:80</a></div></div>
<div class="ttc" id="structarmnn_1_1_q_symm_s8_quantization_scheme_xhtml_a9fb07d8d7554a1502e732b8afa92040a"><div class="ttname"><a href="structarmnn_1_1_q_symm_s8_quantization_scheme.xhtml#a9fb07d8d7554a1502e732b8afa92040a">armnn::QSymmS8QuantizationScheme::ComputeScheme</a></div><div class="ttdeci">OffsetScalePair ComputeScheme(double min, double max) const override</div><div class="ttdef"><b>Definition:</b> <a href="_network_quantization_scheme_8hpp_source.xhtml#l00102">NetworkQuantizationScheme.hpp:102</a></div></div>
<div class="ttc" id="structarmnn_1_1_i_quantization_scheme_xhtml_ad23181f9f8fcc85758f62c49fc7ca23f"><div class="ttname"><a href="structarmnn_1_1_i_quantization_scheme.xhtml#ad23181f9f8fcc85758f62c49fc7ca23f">armnn::IQuantizationScheme::GetDataType</a></div><div class="ttdeci">virtual DataType GetDataType() const =0</div></div>
<div class="ttc" id="structarmnn_1_1_q_asymm_s8_quantization_scheme_xhtml"><div class="ttname"><a href="structarmnn_1_1_q_asymm_s8_quantization_scheme.xhtml">armnn::QAsymmS8QuantizationScheme</a></div><div class="ttdef"><b>Definition:</b> <a href="_network_quantization_scheme_8hpp_source.xhtml#l00064">NetworkQuantizationScheme.hpp:64</a></div></div>
<div class="ttc" id="structarmnn_1_1_q_symm16_quantization_scheme_xhtml_a57d67416d97cb7138e43656b43feb797"><div class="ttname"><a href="structarmnn_1_1_q_symm16_quantization_scheme.xhtml#a57d67416d97cb7138e43656b43feb797">armnn::QSymm16QuantizationScheme::GetDataType</a></div><div class="ttdeci">DataType GetDataType() const override</div><div class="ttdef"><b>Definition:</b> <a href="_network_quantization_scheme_8hpp_source.xhtml#l00154">NetworkQuantizationScheme.hpp:154</a></div></div>
<div class="ttc" id="structarmnn_1_1_i_quantization_scheme_xhtml"><div class="ttname"><a href="structarmnn_1_1_i_quantization_scheme.xhtml">armnn::IQuantizationScheme</a></div><div class="ttdef"><b>Definition:</b> <a href="_network_quantization_scheme_8hpp_source.xhtml#l00018">NetworkQuantizationScheme.hpp:18</a></div></div>
<div class="ttc" id="structarmnn_1_1_q_symm_s8_quantization_scheme_xhtml_a57d67416d97cb7138e43656b43feb797"><div class="ttname"><a href="structarmnn_1_1_q_symm_s8_quantization_scheme.xhtml#a57d67416d97cb7138e43656b43feb797">armnn::QSymmS8QuantizationScheme::GetDataType</a></div><div class="ttdeci">DataType GetDataType() const override</div><div class="ttdef"><b>Definition:</b> <a href="_network_quantization_scheme_8hpp_source.xhtml#l00125">NetworkQuantizationScheme.hpp:125</a></div></div>
<div class="ttc" id="namespacearmnn_xhtml_ad8ed01ff3ff33333d8e19db4d2818bb6a9945327825b115e93a3b89f4302e76db"><div class="ttname"><a href="namespacearmnn.xhtml#ad8ed01ff3ff33333d8e19db4d2818bb6a9945327825b115e93a3b89f4302e76db">armnn::DataType::QSymmS8</a></div></div>
<div class="ttc" id="structarmnn_1_1_q_asymm_s8_quantization_scheme_xhtml_a9fb07d8d7554a1502e732b8afa92040a"><div class="ttname"><a href="structarmnn_1_1_q_asymm_s8_quantization_scheme.xhtml#a9fb07d8d7554a1502e732b8afa92040a">armnn::QAsymmS8QuantizationScheme::ComputeScheme</a></div><div class="ttdeci">OffsetScalePair ComputeScheme(double min, double max) const override</div><div class="ttdef"><b>Definition:</b> <a href="_network_quantization_scheme_8hpp_source.xhtml#l00066">NetworkQuantizationScheme.hpp:66</a></div></div>
<div class="ttc" id="structarmnn_1_1_q_asymm_u8_quantization_scheme_xhtml_a9fb07d8d7554a1502e732b8afa92040a"><div class="ttname"><a href="structarmnn_1_1_q_asymm_u8_quantization_scheme.xhtml#a9fb07d8d7554a1502e732b8afa92040a">armnn::QAsymmU8QuantizationScheme::ComputeScheme</a></div><div class="ttdeci">OffsetScalePair ComputeScheme(double min, double max) const override</div><div class="ttdef"><b>Definition:</b> <a href="_network_quantization_scheme_8hpp_source.xhtml#l00031">NetworkQuantizationScheme.hpp:31</a></div></div>
<div class="ttc" id="structarmnn_1_1_i_quantization_scheme_xhtml_ac7ce71800ca0ebb1222958717a834c9a"><div class="ttname"><a href="structarmnn_1_1_i_quantization_scheme.xhtml#ac7ce71800ca0ebb1222958717a834c9a">armnn::IQuantizationScheme::~IQuantizationScheme</a></div><div class="ttdeci">virtual ~IQuantizationScheme()</div><div class="ttdef"><b>Definition:</b> <a href="_network_quantization_scheme_8hpp_source.xhtml#l00026">NetworkQuantizationScheme.hpp:26</a></div></div>
<div class="ttc" id="structarmnn_1_1_q_symm16_quantization_scheme_xhtml_a9fb07d8d7554a1502e732b8afa92040a"><div class="ttname"><a href="structarmnn_1_1_q_symm16_quantization_scheme.xhtml#a9fb07d8d7554a1502e732b8afa92040a">armnn::QSymm16QuantizationScheme::ComputeScheme</a></div><div class="ttdeci">OffsetScalePair ComputeScheme(double min, double max) const override</div><div class="ttdef"><b>Definition:</b> <a href="_network_quantization_scheme_8hpp_source.xhtml#l00130">NetworkQuantizationScheme.hpp:130</a></div></div>
<div class="ttc" id="structarmnn_1_1_q_asymm_s8_quantization_scheme_xhtml_a1046eb36ff708a1b84f9a6bf0103fbc7"><div class="ttname"><a href="structarmnn_1_1_q_asymm_s8_quantization_scheme.xhtml#a1046eb36ff708a1b84f9a6bf0103fbc7">armnn::QAsymmS8QuantizationScheme::NumBits</a></div><div class="ttdeci">int NumBits() const override</div><div class="ttdef"><b>Definition:</b> <a href="_network_quantization_scheme_8hpp_source.xhtml#l00095">NetworkQuantizationScheme.hpp:95</a></div></div>
<div class="ttc" id="structarmnn_1_1_q_asymm_u8_quantization_scheme_xhtml_a1046eb36ff708a1b84f9a6bf0103fbc7"><div class="ttname"><a href="structarmnn_1_1_q_asymm_u8_quantization_scheme.xhtml#a1046eb36ff708a1b84f9a6bf0103fbc7">armnn::QAsymmU8QuantizationScheme::NumBits</a></div><div class="ttdeci">int NumBits() const override</div><div class="ttdef"><b>Definition:</b> <a href="_network_quantization_scheme_8hpp_source.xhtml#l00059">NetworkQuantizationScheme.hpp:59</a></div></div>
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