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| <div class="title">QuantizedMultiplierSmallerThanOne Struct Reference</div> </div> |
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| |
| <p><code>#include <<a class="el" href="_conv_impl_8hpp_source.html">ConvImpl.hpp</a>></code></p> |
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| <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a> |
| Public Member Functions</h2></td></tr> |
| <tr class="memitem:a1ec4f749fbbdacbe2cc7e8895d5b65ed"><td class="memItemLeft" align="right" valign="top"> </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> |
| <tr class="separator:a1ec4f749fbbdacbe2cc7e8895d5b65ed"><td class="memSeparator" colspan="2"> </td></tr> |
| <tr class="memitem:ac04834893e568dfea4642ecb575faed8"><td class="memItemLeft" align="right" valign="top">int32_t </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> |
| <tr class="memdesc:ac04834893e568dfea4642ecb575faed8"><td class="mdescLeft"> </td><td class="mdescRight">The implementation of this function is adapted from Android NN's MultiplyByQuantizedMultiplierSmallerThanOne(). <a href="#ac04834893e568dfea4642ecb575faed8">More...</a><br /></td></tr> |
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| <a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2> |
| <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> |
| |
| <p class="definition">Definition at line <a class="el" href="_conv_impl_8hpp_source.html#l00029">29</a> of file <a class="el" href="_conv_impl_8hpp_source.html">ConvImpl.hpp</a>.</p> |
| </div><h2 class="groupheader">Constructor & Destructor Documentation</h2> |
| <a id="a1ec4f749fbbdacbe2cc7e8895d5b65ed"></a> |
| <h2 class="memtitle"><span class="permalink"><a href="#a1ec4f749fbbdacbe2cc7e8895d5b65ed">◆ </a></span>QuantizedMultiplierSmallerThanOne()</h2> |
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| <td class="memname"><a class="el" href="structarmnn_1_1_quantized_multiplier_smaller_than_one.html">QuantizedMultiplierSmallerThanOne</a> </td> |
| <td>(</td> |
| <td class="paramtype">float </td> |
| <td class="paramname"><em>multiplier</em></td><td>)</td> |
| <td></td> |
| </tr> |
| </table> |
| </div><div class="memdoc"> |
| <p>Constructs a <a class="el" href="structarmnn_1_1_quantized_multiplier_smaller_than_one.html">QuantizedMultiplierSmallerThanOne</a> which will multiply by the given multiplier. 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> |
| |
| <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> |
| <div class="fragment"><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> {</div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span>  BOOST_ASSERT(multiplier >= 0.0f && multiplier < 1.0f);</div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span>  <span class="keywordflow">if</span> (multiplier == 0.0f)</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>  m_Multiplier = 0;</div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  m_RightShift = 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="keywordflow">else</span></div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  {</div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  <span class="keyword">const</span> <span class="keywordtype">double</span> q = std::frexp(multiplier, &m_RightShift);</div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  m_RightShift = -m_RightShift;</div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  int64_t qFixed = <span class="keyword">static_cast<</span>int64_t<span class="keyword">></span>(std::round(q * (1ll << 31)));</div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  BOOST_ASSERT(qFixed <= (1ll << 31));</div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  <span class="keywordflow">if</span> (qFixed == (1ll << 31))</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>  qFixed /= 2;</div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  --m_RightShift;</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>  BOOST_ASSERT(m_RightShift >= 0);</div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  BOOST_ASSERT(qFixed <= std::numeric_limits<int32_t>::max());</div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  m_Multiplier = <span class="keyword">static_cast<</span>int32_t<span class="keyword">></span>(qFixed);</div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  }</div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> }</div></div><!-- fragment --> |
| </div> |
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| <h2 class="groupheader">Member Function Documentation</h2> |
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| <h2 class="memtitle"><span class="permalink"><a href="#ac04834893e568dfea4642ecb575faed8">◆ </a></span>operator*()</h2> |
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| <td class="memname">int32_t operator* </td> |
| <td>(</td> |
| <td class="paramtype">int32_t </td> |
| <td class="paramname"><em>rhs</em></td><td>)</td> |
| <td> const</td> |
| </tr> |
| </table> |
| </div><div class="memdoc"> |
| |
| <p>The implementation of this function is adapted from Android NN's MultiplyByQuantizedMultiplierSmallerThanOne(). </p> |
| |
| <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> |
| <div class="fragment"><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>  int32_t x = SaturatingRoundingDoublingHighMul(rhs, m_Multiplier);</div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <span class="keywordflow">return</span> RoundingDivideByPOT(x, m_RightShift);</div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span> }</div></div><!-- fragment --> |
| </div> |
| </div> |
| <hr/>The documentation for this struct was generated from the following files:<ul> |
| <li>src/backends/reference/workloads/<a class="el" href="_conv_impl_8hpp_source.html">ConvImpl.hpp</a></li> |
| <li>src/backends/reference/workloads/<a class="el" href="_conv_impl_8cpp_source.html">ConvImpl.cpp</a></li> |
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