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Nikhil Raj38b600d2024-02-15 15:02:19 +0000[diff] [blame^]39 &#160;<span id="projectnumber">24.02</span>
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95 <div class="summary">
96<a href="#pub-methods">Public Member Functions</a> &#124;
97<a href="structarmnn_1_1_quantized_multiplier_smaller_than_one-members.html">List of all members</a> </div>
98 <div class="headertitle">
99<div class="title">QuantizedMultiplierSmallerThanOne Struct Reference</div> </div>
100</div><!--header-->
101<div class="contents">
102
103<p>Performs multiplication of an integer with a multiplier which is less than one, using quantized integer arithmetic which is consistent with AndroidNN's CPU executor.
104 <a href="structarmnn_1_1_quantized_multiplier_smaller_than_one.html#details">More...</a></p>
105
106<p><code>#include &lt;<a class="el" href="_conv_impl_8hpp_source.html">ConvImpl.hpp</a>&gt;</code></p>
107<table class="memberdecls">
108<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a>
109Public Member Functions</h2></td></tr>
110<tr class="memitem:a1ec4f749fbbdacbe2cc7e8895d5b65ed"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structarmnn_1_1_quantized_multiplier_smaller_than_one.html#a1ec4f749fbbdacbe2cc7e8895d5b65ed">QuantizedMultiplierSmallerThanOne</a> (float multiplier)</td></tr>
111<tr class="memdesc:a1ec4f749fbbdacbe2cc7e8895d5b65ed"><td class="mdescLeft">&#160;</td><td class="mdescRight">Constructs a <a class="el" href="structarmnn_1_1_quantized_multiplier_smaller_than_one.html" title="Performs multiplication of an integer with a multiplier which is less than one, using quantized integ...">QuantizedMultiplierSmallerThanOne</a> which will multiply by the given multiplier. <a href="structarmnn_1_1_quantized_multiplier_smaller_than_one.html#a1ec4f749fbbdacbe2cc7e8895d5b65ed">More...</a><br /></td></tr>
112<tr class="separator:a1ec4f749fbbdacbe2cc7e8895d5b65ed"><td class="memSeparator" colspan="2">&#160;</td></tr>
113<tr class="memitem:ac04834893e568dfea4642ecb575faed8"><td class="memItemLeft" align="right" valign="top">int32_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structarmnn_1_1_quantized_multiplier_smaller_than_one.html#ac04834893e568dfea4642ecb575faed8">operator*</a> (int32_t rhs) const</td></tr>
114<tr class="memdesc:ac04834893e568dfea4642ecb575faed8"><td class="mdescLeft">&#160;</td><td class="mdescRight">The implementation of this function is adapted from Android NN's MultiplyByQuantizedMultiplierSmallerThanOne(). <a href="structarmnn_1_1_quantized_multiplier_smaller_than_one.html#ac04834893e568dfea4642ecb575faed8">More...</a><br /></td></tr>
115<tr class="separator:ac04834893e568dfea4642ecb575faed8"><td class="memSeparator" colspan="2">&#160;</td></tr>
116</table>
117<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
118<div class="textblock"><p>Performs multiplication of an integer with a multiplier which is less than one, using quantized integer arithmetic which is consistent with AndroidNN's CPU executor. </p>
119
120<p class="definition">Definition at line <a class="el" href="_conv_impl_8hpp_source.html#l00026">26</a> of file <a class="el" href="_conv_impl_8hpp_source.html">ConvImpl.hpp</a>.</p>
121</div><h2 class="groupheader">Constructor &amp; Destructor Documentation</h2>
122<a id="a1ec4f749fbbdacbe2cc7e8895d5b65ed"></a>
123<h2 class="memtitle"><span class="permalink"><a href="#a1ec4f749fbbdacbe2cc7e8895d5b65ed">&#9670;&nbsp;</a></span>QuantizedMultiplierSmallerThanOne()</h2>
124
125<div class="memitem">
126<div class="memproto">
127 <table class="memname">
128 <tr>
129 <td class="memname"><a class="el" href="structarmnn_1_1_quantized_multiplier_smaller_than_one.html">QuantizedMultiplierSmallerThanOne</a> </td>
130 <td>(</td>
131 <td class="paramtype">float&#160;</td>
132 <td class="paramname"><em>multiplier</em></td><td>)</td>
133 <td></td>
134 </tr>
135 </table>
136</div><div class="memdoc">
137
138<p>Constructs a <a class="el" href="structarmnn_1_1_quantized_multiplier_smaller_than_one.html" title="Performs multiplication of an integer with a multiplier which is less than one, using quantized integ...">QuantizedMultiplierSmallerThanOne</a> which will multiply by the given multiplier. </p>
139<p>This stores the appropriate integer quantities (derived from the given multiplier) for later use. The implementation of this function is adapted from Android NN's QuantizeMultiplierSmallerThanOne(). </p>
140
141<p class="definition">Definition at line <a class="el" href="_conv_impl_8cpp_source.html#l00016">16</a> of file <a class="el" href="_conv_impl_8cpp_source.html">ConvImpl.cpp</a>.</p>
142<div class="fragment"><div class="line"><a name="l00017"></a><span class="lineno"> 17</span>&#160;{</div>
143<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>&#160; <a class="code" href="_assert_8hpp.html#a5698be69cbd5dfe6c28fcd9867e8cbed">ARMNN_ASSERT</a>(multiplier &gt;= 0.0f &amp;&amp; multiplier &lt; 1.0f);</div>
144<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160; <span class="keywordflow">if</span> (multiplier == 0.0f)</div>
145<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160; {</div>
146<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>&#160; m_Multiplier = 0;</div>
147<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>&#160; m_RightShift = 0;</div>
148<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>&#160; }</div>
149<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160; <span class="keywordflow">else</span></div>
150<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>&#160; {</div>
151<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>&#160; <span class="keyword">const</span> <span class="keywordtype">double</span> q = std::frexp(multiplier, &amp;m_RightShift);</div>
152<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>&#160; m_RightShift = -m_RightShift;</div>
153<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160; int64_t qFixed = <span class="keyword">static_cast&lt;</span>int64_t<span class="keyword">&gt;</span>(::round(q * (1ll &lt;&lt; 31)));</div>
154<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160; <a class="code" href="_assert_8hpp.html#a5698be69cbd5dfe6c28fcd9867e8cbed">ARMNN_ASSERT</a>(qFixed &lt;= (1ll &lt;&lt; 31));</div>
155<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160; <span class="keywordflow">if</span> (qFixed == (1ll &lt;&lt; 31))</div>
156<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160; {</div>
157<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>&#160; qFixed /= 2;</div>
158<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>&#160; --m_RightShift;</div>
159<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>&#160; }</div>
160<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160; <a class="code" href="_assert_8hpp.html#a5698be69cbd5dfe6c28fcd9867e8cbed">ARMNN_ASSERT</a>(m_RightShift &gt;= 0);</div>
161<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160; <a class="code" href="_assert_8hpp.html#a5698be69cbd5dfe6c28fcd9867e8cbed">ARMNN_ASSERT</a>(qFixed &lt;= std::numeric_limits&lt;int32_t&gt;::max());</div>
162<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>&#160; m_Multiplier = <span class="keyword">static_cast&lt;</span>int32_t<span class="keyword">&gt;</span>(qFixed);</div>
163<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>&#160; }</div>
164<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>&#160;}</div>
165</div><!-- fragment -->
166<p class="reference">References <a class="el" href="_assert_8hpp_source.html#l00014">ARMNN_ASSERT</a>.</p>
167
168</div>
169</div>
170<h2 class="groupheader">Member Function Documentation</h2>
171<a id="ac04834893e568dfea4642ecb575faed8"></a>
172<h2 class="memtitle"><span class="permalink"><a href="#ac04834893e568dfea4642ecb575faed8">&#9670;&nbsp;</a></span>operator*()</h2>
173
174<div class="memitem">
175<div class="memproto">
176 <table class="memname">
177 <tr>
178 <td class="memname">int32_t operator* </td>
179 <td>(</td>
180 <td class="paramtype">int32_t&#160;</td>
181 <td class="paramname"><em>rhs</em></td><td>)</td>
182 <td> const</td>
183 </tr>
184 </table>
185</div><div class="memdoc">
186
187<p>The implementation of this function is adapted from Android NN's MultiplyByQuantizedMultiplierSmallerThanOne(). </p>
188
189<p class="definition">Definition at line <a class="el" href="_conv_impl_8cpp_source.html#l00041">41</a> of file <a class="el" href="_conv_impl_8cpp_source.html">ConvImpl.cpp</a>.</p>
190<div class="fragment"><div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160;{</div>
191<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>&#160; int32_t x = SaturatingRoundingDoublingHighMul(rhs, m_Multiplier);</div>
192<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160; <span class="keywordflow">return</span> RoundingDivideByPOT(x, m_RightShift);</div>
193<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>&#160;}</div>
194</div><!-- fragment -->
195</div>
196</div>
197<hr/>The documentation for this struct was generated from the following files:<ul>
198<li>src/backends/reference/workloads/<a class="el" href="_conv_impl_8hpp_source.html">ConvImpl.hpp</a></li>
199<li>src/backends/reference/workloads/<a class="el" href="_conv_impl_8cpp_source.html">ConvImpl.cpp</a></li>
200</ul>
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Nikhil Raj38b600d2024-02-15 15:02:19 +0000[diff] [blame^]208 <li class="footer">Generated on Wed Feb 14 2024 16:36:24 for Arm NN by
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