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<a href="#func-members">Functions</a> </div>
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<div class="title">arm_compute::quantization Namespace Reference</div> </div>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:a22032f9cf47deae265eafb65ff55b594"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classarm__compute_1_1_status.xhtml">arm_compute::Status</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="namespacearm__compute_1_1quantization.xhtml#a22032f9cf47deae265eafb65ff55b594">calculate_quantized_multiplier_less_than_one</a> (float multiplier, int *quant_multiplier, int *right_shift)</td></tr>
<tr class="memdesc:a22032f9cf47deae265eafb65ff55b594"><td class="mdescLeft">&#160;</td><td class="mdescRight">Calculate quantized representation of multiplier with value less than one. <a href="#a22032f9cf47deae265eafb65ff55b594">More...</a><br /></td></tr>
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<tr class="memitem:ae8bdc82ba415ef002ef1637b5cd02bbd"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classarm__compute_1_1_status.xhtml">arm_compute::Status</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="namespacearm__compute_1_1quantization.xhtml#ae8bdc82ba415ef002ef1637b5cd02bbd">calculate_quantized_multiplier_greater_than_one</a> (float multiplier, int *quantized_multiplier, int *left_shift)</td></tr>
<tr class="memdesc:ae8bdc82ba415ef002ef1637b5cd02bbd"><td class="mdescLeft">&#160;</td><td class="mdescRight">Calculate quantized representation of multiplier having value greater than one. <a href="#ae8bdc82ba415ef002ef1637b5cd02bbd">More...</a><br /></td></tr>
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<h2 class="groupheader">Function Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#ae8bdc82ba415ef002ef1637b5cd02bbd">&#9670;&nbsp;</a></span>calculate_quantized_multiplier_greater_than_one()</h2>
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<td class="memname"><a class="el" href="classarm__compute_1_1_status.xhtml">arm_compute::Status</a> calculate_quantized_multiplier_greater_than_one </td>
<td>(</td>
<td class="paramtype">float&#160;</td>
<td class="paramname"><em>multiplier</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int *&#160;</td>
<td class="paramname"><em>quantized_multiplier</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int *&#160;</td>
<td class="paramname"><em>left_shift</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
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<p>Calculate quantized representation of multiplier having value greater than one. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">multiplier</td><td>Real multiplier. </td></tr>
<tr><td class="paramdir">[out]</td><td class="paramname">quantized_multiplier</td><td>Integer multiplier. </td></tr>
<tr><td class="paramdir">[out]</td><td class="paramname">left_shift</td><td>Left bit shift.</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>a status </dd></dl>
<p class="definition">Definition at line <a class="el" href="_asymm_helpers_8cpp_source.xhtml#l00073">73</a> of file <a class="el" href="_asymm_helpers_8cpp_source.xhtml">AsymmHelpers.cpp</a>.</p>
<div class="fragment"><div class="line"><a name="l00076"></a><span class="lineno"> 76</span>&#160;{</div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160; <a class="code" href="_error_8h.xhtml#a206d6e247e0957ac3dee45d27756fc25">ARM_COMPUTE_RETURN_ERROR_ON</a>(quantized_multiplier == <span class="keyword">nullptr</span>);</div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160; <a class="code" href="_error_8h.xhtml#a206d6e247e0957ac3dee45d27756fc25">ARM_COMPUTE_RETURN_ERROR_ON</a>(left_shift == <span class="keyword">nullptr</span>);</div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span>&#160; <a class="code" href="_error_8h.xhtml#a206d6e247e0957ac3dee45d27756fc25">ARM_COMPUTE_RETURN_ERROR_ON</a>(multiplier &lt; 1.f);</div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>&#160; <span class="keyword">const</span> <span class="keywordtype">double</span> q = std::frexp(multiplier, left_shift);</div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>&#160; <span class="keyword">auto</span> q_fixed = static_cast&lt;int64_t&gt;(<a class="code" href="namespacearm__compute.xhtml#aaae2b6b1c3f4404121346a4c27b22647">round</a>(q * <a class="code" href="_asymm_helpers_8cpp.xhtml#ab153bd5bebd2a695c5d2c79801d0abec">fixed_point_one_Q0</a>));</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span>&#160; <a class="code" href="_error_8h.xhtml#a206d6e247e0957ac3dee45d27756fc25">ARM_COMPUTE_RETURN_ERROR_ON</a>(q_fixed &gt; <a class="code" href="_asymm_helpers_8cpp.xhtml#ab153bd5bebd2a695c5d2c79801d0abec">fixed_point_one_Q0</a>);</div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span>&#160; <span class="keywordflow">if</span>(q_fixed == <a class="code" href="_asymm_helpers_8cpp.xhtml#ab153bd5bebd2a695c5d2c79801d0abec">fixed_point_one_Q0</a>)</div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>&#160; {</div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span>&#160; q_fixed /= 2;</div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160; ++*left_shift;</div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span>&#160; }</div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span>&#160; <a class="code" href="_error_8h.xhtml#a206d6e247e0957ac3dee45d27756fc25">ARM_COMPUTE_RETURN_ERROR_ON</a>(*left_shift &lt; 0);</div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span>&#160; <a class="code" href="_error_8h.xhtml#a206d6e247e0957ac3dee45d27756fc25">ARM_COMPUTE_RETURN_ERROR_ON</a>(q_fixed &gt; std::numeric_limits&lt;int32_t&gt;::max());</div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span>&#160; *quantized_multiplier = static_cast&lt;int32_t&gt;(q_fixed);</div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>&#160;</div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160; <span class="keywordflow">return</span> <a class="code" href="classarm__compute_1_1_status.xhtml">arm_compute::Status</a>{};</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span>&#160;}</div><div class="ttc" id="_asymm_helpers_8cpp_xhtml_ab153bd5bebd2a695c5d2c79801d0abec"><div class="ttname"><a href="_asymm_helpers_8cpp.xhtml#ab153bd5bebd2a695c5d2c79801d0abec">fixed_point_one_Q0</a></div><div class="ttdeci">constexpr int64_t fixed_point_one_Q0</div><div class="ttdef"><b>Definition:</b> <a href="_asymm_helpers_8cpp_source.xhtml#l00032">AsymmHelpers.cpp:32</a></div></div>
<div class="ttc" id="classarm__compute_1_1_status_xhtml"><div class="ttname"><a href="classarm__compute_1_1_status.xhtml">arm_compute::Status</a></div><div class="ttdoc">Status class.</div><div class="ttdef"><b>Definition:</b> <a href="_error_8h_source.xhtml#l00052">Error.h:52</a></div></div>
<div class="ttc" id="_error_8h_xhtml_a206d6e247e0957ac3dee45d27756fc25"><div class="ttname"><a href="_error_8h.xhtml#a206d6e247e0957ac3dee45d27756fc25">ARM_COMPUTE_RETURN_ERROR_ON</a></div><div class="ttdeci">#define ARM_COMPUTE_RETURN_ERROR_ON(cond)</div><div class="ttdoc">If the condition is true, an error is returned.</div><div class="ttdef"><b>Definition:</b> <a href="_error_8h_source.xhtml#l00244">Error.h:244</a></div></div>
<div class="ttc" id="namespacearm__compute_xhtml_aaae2b6b1c3f4404121346a4c27b22647"><div class="ttname"><a href="namespacearm__compute.xhtml#aaae2b6b1c3f4404121346a4c27b22647">arm_compute::round</a></div><div class="ttdeci">int round(float x, RoundingPolicy rounding_policy)</div><div class="ttdoc">Return a rounded value of x.</div><div class="ttdef"><b>Definition:</b> <a href="_rounding_8cpp_source.xhtml#l00035">Rounding.cpp:35</a></div></div>
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<p class="reference">References <a class="el" href="_error_8h_source.xhtml#l00244">ARM_COMPUTE_RETURN_ERROR_ON</a>, <a class="el" href="_asymm_helpers_8cpp_source.xhtml#l00032">fixed_point_one_Q0</a>, and <a class="el" href="_rounding_8cpp_source.xhtml#l00035">arm_compute::round()</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#a22032f9cf47deae265eafb65ff55b594">&#9670;&nbsp;</a></span>calculate_quantized_multiplier_less_than_one()</h2>
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<td class="memname"><a class="el" href="classarm__compute_1_1_status.xhtml">arm_compute::Status</a> calculate_quantized_multiplier_less_than_one </td>
<td>(</td>
<td class="paramtype">float&#160;</td>
<td class="paramname"><em>multiplier</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int *&#160;</td>
<td class="paramname"><em>quant_multiplier</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int *&#160;</td>
<td class="paramname"><em>right_shift</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Calculate quantized representation of multiplier with value less than one. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">multiplier</td><td>Real multiplier. </td></tr>
<tr><td class="paramdir">[out]</td><td class="paramname">quant_multiplier</td><td>Integer multiplier. </td></tr>
<tr><td class="paramdir">[out]</td><td class="paramname">right_shift</td><td>Right bit shift.</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>a status </dd></dl>
<p class="definition">Definition at line <a class="el" href="_asymm_helpers_8cpp_source.xhtml#l00035">35</a> of file <a class="el" href="_asymm_helpers_8cpp_source.xhtml">AsymmHelpers.cpp</a>.</p>
<div class="fragment"><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; <a class="code" href="_error_8h.xhtml#a206d6e247e0957ac3dee45d27756fc25">ARM_COMPUTE_RETURN_ERROR_ON</a>(quant_multiplier == <span class="keyword">nullptr</span>);</div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span>&#160; <a class="code" href="_error_8h.xhtml#a206d6e247e0957ac3dee45d27756fc25">ARM_COMPUTE_RETURN_ERROR_ON</a>(right_shift == <span class="keyword">nullptr</span>);</div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160; <a class="code" href="_error_8h.xhtml#a206d6e247e0957ac3dee45d27756fc25">ARM_COMPUTE_RETURN_ERROR_ON</a>(multiplier &lt; -<a class="code" href="_asymm_helpers_8cpp.xhtml#a552dc3787d7ea1675f3e4e8993501d58">epsilon</a>);</div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160; <a class="code" href="_error_8h.xhtml#a206d6e247e0957ac3dee45d27756fc25">ARM_COMPUTE_RETURN_ERROR_ON</a>(multiplier &gt; 1.0f + <a class="code" href="_asymm_helpers_8cpp.xhtml#a552dc3787d7ea1675f3e4e8993501d58">epsilon</a>);</div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span>&#160; <span class="keywordflow">if</span>(std::fabs(1.0f - multiplier) &lt; <a class="code" href="_asymm_helpers_8cpp.xhtml#a552dc3787d7ea1675f3e4e8993501d58">epsilon</a>)</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; *quant_multiplier = 1;</div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span>&#160; *right_shift = 0;</div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span>&#160; <span class="keywordflow">return</span> <a class="code" href="classarm__compute_1_1_status.xhtml">arm_compute::Status</a>{};</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;</div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span>&#160; <span class="keywordflow">if</span>(std::fabs(0.0f - multiplier) &lt; <a class="code" href="_asymm_helpers_8cpp.xhtml#a552dc3787d7ea1675f3e4e8993501d58">epsilon</a>)</div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160; {</div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span>&#160; *quant_multiplier = 0;</div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160; *right_shift = 0;</div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span>&#160; <span class="keywordflow">return</span> <a class="code" href="classarm__compute_1_1_status.xhtml">arm_compute::Status</a>{};</div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span>&#160; }</div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160;</div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160; <span class="keyword">const</span> <span class="keywordtype">double</span> q = std::frexp(multiplier, right_shift);</div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span>&#160; *right_shift *= -1;</div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span>&#160; <span class="keyword">auto</span> q_fixed = static_cast&lt;int64_t&gt;(<a class="code" href="namespacearm__compute.xhtml#aaae2b6b1c3f4404121346a4c27b22647">round</a>(q * <a class="code" href="_asymm_helpers_8cpp.xhtml#ab153bd5bebd2a695c5d2c79801d0abec">fixed_point_one_Q0</a>));</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160; <a class="code" href="_error_8h.xhtml#a206d6e247e0957ac3dee45d27756fc25">ARM_COMPUTE_RETURN_ERROR_ON</a>(q_fixed &gt; <a class="code" href="_asymm_helpers_8cpp.xhtml#ab153bd5bebd2a695c5d2c79801d0abec">fixed_point_one_Q0</a>);</div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>&#160; <span class="keywordflow">if</span>(q_fixed == <a class="code" href="_asymm_helpers_8cpp.xhtml#ab153bd5bebd2a695c5d2c79801d0abec">fixed_point_one_Q0</a>)</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160; {</div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160; q_fixed /= 2;</div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160; --*right_shift;</div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160; }</div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160; <a class="code" href="_error_8h.xhtml#a206d6e247e0957ac3dee45d27756fc25">ARM_COMPUTE_RETURN_ERROR_ON</a>(*right_shift &lt; 0);</div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160; <a class="code" href="_error_8h.xhtml#a206d6e247e0957ac3dee45d27756fc25">ARM_COMPUTE_RETURN_ERROR_ON</a>(q_fixed &gt; std::numeric_limits&lt;int32_t&gt;::max());</div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160; *quant_multiplier = static_cast&lt;int32_t&gt;(q_fixed);</div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160;</div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>&#160; <span class="keywordflow">return</span> <a class="code" href="classarm__compute_1_1_status.xhtml">arm_compute::Status</a>{};</div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160;}</div><div class="ttc" id="_asymm_helpers_8cpp_xhtml_ab153bd5bebd2a695c5d2c79801d0abec"><div class="ttname"><a href="_asymm_helpers_8cpp.xhtml#ab153bd5bebd2a695c5d2c79801d0abec">fixed_point_one_Q0</a></div><div class="ttdeci">constexpr int64_t fixed_point_one_Q0</div><div class="ttdef"><b>Definition:</b> <a href="_asymm_helpers_8cpp_source.xhtml#l00032">AsymmHelpers.cpp:32</a></div></div>
<div class="ttc" id="_asymm_helpers_8cpp_xhtml_a552dc3787d7ea1675f3e4e8993501d58"><div class="ttname"><a href="_asymm_helpers_8cpp.xhtml#a552dc3787d7ea1675f3e4e8993501d58">epsilon</a></div><div class="ttdeci">constexpr float epsilon</div><div class="ttdef"><b>Definition:</b> <a href="_asymm_helpers_8cpp_source.xhtml#l00033">AsymmHelpers.cpp:33</a></div></div>
<div class="ttc" id="classarm__compute_1_1_status_xhtml"><div class="ttname"><a href="classarm__compute_1_1_status.xhtml">arm_compute::Status</a></div><div class="ttdoc">Status class.</div><div class="ttdef"><b>Definition:</b> <a href="_error_8h_source.xhtml#l00052">Error.h:52</a></div></div>
<div class="ttc" id="_error_8h_xhtml_a206d6e247e0957ac3dee45d27756fc25"><div class="ttname"><a href="_error_8h.xhtml#a206d6e247e0957ac3dee45d27756fc25">ARM_COMPUTE_RETURN_ERROR_ON</a></div><div class="ttdeci">#define ARM_COMPUTE_RETURN_ERROR_ON(cond)</div><div class="ttdoc">If the condition is true, an error is returned.</div><div class="ttdef"><b>Definition:</b> <a href="_error_8h_source.xhtml#l00244">Error.h:244</a></div></div>
<div class="ttc" id="namespacearm__compute_xhtml_aaae2b6b1c3f4404121346a4c27b22647"><div class="ttname"><a href="namespacearm__compute.xhtml#aaae2b6b1c3f4404121346a4c27b22647">arm_compute::round</a></div><div class="ttdeci">int round(float x, RoundingPolicy rounding_policy)</div><div class="ttdoc">Return a rounded value of x.</div><div class="ttdef"><b>Definition:</b> <a href="_rounding_8cpp_source.xhtml#l00035">Rounding.cpp:35</a></div></div>
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<p class="reference">References <a class="el" href="_error_8h_source.xhtml#l00244">ARM_COMPUTE_RETURN_ERROR_ON</a>, <a class="el" href="_asymm_helpers_8cpp_source.xhtml#l00033">epsilon</a>, <a class="el" href="_asymm_helpers_8cpp_source.xhtml#l00032">fixed_point_one_Q0</a>, and <a class="el" href="_rounding_8cpp_source.xhtml#l00035">arm_compute::round()</a>.</p>
<p class="reference">Referenced by <a class="el" href="_c_l_depthwise_convolution_layer3x3_n_c_h_w_kernel_8cpp_source.xhtml#l00227">CLDepthwiseConvolutionLayer3x3NCHWKernel::configure()</a>, <a class="el" href="_c_l_depthwise_convolution_layer3x3_n_h_w_c_kernel_8cpp_source.xhtml#l00178">CLDepthwiseConvolutionLayer3x3NHWCKernel::configure()</a>, <a class="el" href="_c_l_direct_convolution_layer_kernel_8cpp_source.xhtml#l00389">CLDirectConvolutionLayerKernel::configure()</a>, <a class="el" href="_c_l_l_s_t_m_layer_quantized_8cpp_source.xhtml#l00058">CLLSTMLayerQuantized::configure()</a>, <a class="el" href="_n_e_l_s_t_m_layer_quantized_8cpp_source.xhtml#l00057">NELSTMLayerQuantized::configure()</a>, <a class="el" href="_c_l_g_e_m_m_deconvolution_layer_8cpp_source.xhtml#l00186">CLGEMMDeconvolutionLayer::configure()</a>, <a class="el" href="_n_e_fully_connected_layer_8cpp_source.xhtml#l00139">NEFullyConnectedLayer::configure()</a>, <a class="el" href="_c_l_fully_connected_layer_8cpp_source.xhtml#l00140">CLFullyConnectedLayer::configure()</a>, <a class="el" href="_c_l_g_e_m_m_convolution_layer_8cpp_source.xhtml#l00177">CLGEMMConvolutionLayer::configure()</a>, <a class="el" href="_c_l_depthwise_convolution_layer_8cpp_source.xhtml#l00256">CLDepthwiseConvolutionLayer::configure()</a>, <a class="el" href="_n_e_depthwise_convolution_layer_8cpp_source.xhtml#l00711">NEDepthwiseConvolutionLayer::configure()</a>, <a class="el" href="validation_2reference_2_depthwise_convolution_layer_8cpp_source.xhtml#l00128">arm_compute::test::validation::reference::depthwise_convolution()</a>, <a class="el" href="_n_e_depthwise_convolution_layer_8cpp_source.xhtml#l00230">NEDepthwiseConvolutionLayer3x3::validate()</a>, <a class="el" href="_c_l_g_e_m_m_convolution_layer_8cpp_source.xhtml#l00373">CLGEMMConvolutionLayer::validate()</a>, and <a class="el" href="_n_e_depthwise_convolution_layer_8cpp_source.xhtml#l00858">NEDepthwiseConvolutionLayer::validate()</a>.</p>
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