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<a href="../../_sources/functionlib/dsplib/switch.rst.txt" rel="nofollow"> 查看页面源码</a>
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<div itemprop="articleBody">
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<section id="switch">
|
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<h1>Switch<a class="headerlink" href="#switch" title="此标题的永久链接"></a></h1>
|
||
<p>根据条件选择输入张量。该算子根据布尔条件 <cite>condition</cite> 的值，选择 <cite>input_x</cite> 或 <cite>input_y</cite> 作为输出。该算子不区分数据类型，适用于所有数据类型。</p>
|
||
<div class="math notranslate nohighlight">
|
||
\[\begin{split}\text{output} = \begin{cases}
|
||
\text{input\_x}, & \text{if } \text{condition} = \text{True} \\
|
||
\text{input\_y}, & \text{if } \text{condition} = \text{False}
|
||
\end{cases}\end{split}\]</div>
|
||
<p>该算子不复制数据，只是将输出指针指向选中的输入张量。因此，输出张量共享输入张量的数据指针和元数据。</p>
|
||
<dl class="simple">
|
||
<dt>输入：</dt><dd><ul class="simple">
|
||
<li><p><strong>input_x</strong> - 第一个输入张量（TensorC* 类型）。当 <cite>condition</cite> 为 True 时被选中。</p></li>
|
||
<li><p><strong>input_y</strong> - 第二个输入张量（TensorC* 类型）。当 <cite>condition</cite> 为 False 时被选中。</p></li>
|
||
<li><p><strong>condition</strong> - 条件值（bool 类型），决定选择哪个输入张量。</p></li>
|
||
</ul>
|
||
</dd>
|
||
<dt>输出：</dt><dd><ul class="simple">
|
||
<li><p><strong>output</strong> - 输出张量指针的指针（TensorC** 类型），指向选中的输入张量。</p></li>
|
||
</ul>
|
||
</dd>
|
||
<dt>支持平台：</dt><dd><p><code class="docutils literal notranslate"><span class="pre">FT78NE</span></code>
|
||
<code class="docutils literal notranslate"><span class="pre">MT7004</span></code></p>
|
||
</dd>
|
||
</dl>
|
||
<div class="admonition note">
|
||
<p class="admonition-title">备注</p>
|
||
<ul class="simple">
|
||
<li><p>该算子不区分数据类型，适用于所有数据类型</p></li>
|
||
<li><p>算子不复制数据，输出张量共享输入张量的数据指针</p></li>
|
||
<li><p>输出张量的所有元数据（形状、数据类型、格式等）与选中的输入张量相同</p></li>
|
||
</ul>
|
||
</div>
|
||
<p><strong>共享存储版本:</strong></p>
|
||
<dl class="c function">
|
||
<dt class="sig sig-object c" id="c.switch_s">
|
||
<span class="kt"><span class="pre">void</span></span><span class="w"> </span><span class="sig-name descname"><span class="n"><span class="pre">switch_s</span></span></span><span class="sig-paren">(</span><span class="n"><span class="pre">TensorC</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">input_x</span></span>, <span class="n"><span class="pre">TensorC</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">input_y</span></span>, <span class="n"><span class="pre">TensorC</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">output</span></span>, <span class="kt"><span class="pre">bool</span></span><span class="w"> </span><span class="n"><span class="pre">condition</span></span><span class="sig-paren">)</span><a class="headerlink" href="#c.switch_s" title="永久链接至目标"></a><br /></dt>
|
||
<dd></dd></dl>
|
||
|
||
<p><strong>C调用示例：</strong></p>
|
||
<div class="highlight-c notranslate"><div class="highlight"><pre><span></span><span class="linenos"> 1</span><span class="c1">//FT78NE示例</span>
|
||
<span class="linenos"> 2</span><span class="cp">#include</span><span class="w"> </span><span class="cpf"><stdio.h></span>
|
||
<span class="linenos"> 3</span><span class="cp">#include</span><span class="w"> </span><span class="cpf"><switch.h></span>
|
||
<span class="linenos"> 4</span>
|
||
<span class="linenos"> 5</span><span class="kt">int</span><span class="w"> </span><span class="nf">main</span><span class="p">(</span><span class="kt">int</span><span class="w"> </span><span class="n">argc</span><span class="p">,</span><span class="w"> </span><span class="kt">char</span><span class="o">*</span><span class="w"> </span><span class="n">argv</span><span class="p">[])</span><span class="w"> </span><span class="p">{</span>
|
||
<span class="linenos"> 6</span><span class="w"> </span><span class="n">TensorC</span><span class="w"> </span><span class="n">input_x</span><span class="p">;</span>
|
||
<span class="linenos"> 7</span><span class="w"> </span><span class="n">TensorC</span><span class="w"> </span><span class="n">input_y</span><span class="p">;</span>
|
||
<span class="linenos"> 8</span><span class="w"> </span><span class="n">TensorC</span><span class="o">*</span><span class="w"> </span><span class="n">output</span><span class="p">;</span>
|
||
<span class="linenos"> 9</span>
|
||
<span class="linenos">10</span><span class="w"> </span><span class="c1">// 初始化 input_x</span>
|
||
<span class="linenos">11</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">x_shape</span><span class="p">[</span><span class="mi">3</span><span class="p">]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">{</span><span class="mi">2</span><span class="p">,</span><span class="w"> </span><span class="mi">3</span><span class="p">,</span><span class="w"> </span><span class="mi">4</span><span class="p">};</span>
|
||
<span class="linenos">12</span><span class="w"> </span><span class="n">memcpy</span><span class="p">(</span><span class="n">input_x</span><span class="p">.</span><span class="n">shape_</span><span class="p">,</span><span class="w"> </span><span class="n">x_shape</span><span class="p">,</span><span class="w"> </span><span class="mi">3</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="k">sizeof</span><span class="p">(</span><span class="kt">int</span><span class="p">));</span>
|
||
<span class="linenos">13</span><span class="w"> </span><span class="n">input_x</span><span class="p">.</span><span class="n">shape_size_</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">3</span><span class="p">;</span>
|
||
<span class="linenos">14</span><span class="w"> </span><span class="n">input_x</span><span class="p">.</span><span class="n">data_type_</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">kNumberTypeFloat32</span><span class="p">;</span>
|
||
<span class="linenos">15</span><span class="w"> </span><span class="n">input_x</span><span class="p">.</span><span class="n">format_</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">Format_NCHW</span><span class="p">;</span>
|
||
<span class="linenos">16</span><span class="w"> </span><span class="n">input_x</span><span class="p">.</span><span class="n">data_</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">(</span><span class="kt">void</span><span class="w"> </span><span class="o">*</span><span class="p">)</span><span class="mh">0xA0000000</span><span class="p">;</span>
|
||
<span class="linenos">17</span><span class="w"> </span><span class="n">input_x</span><span class="p">.</span><span class="n">category_</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span><span class="p">;</span><span class="w"> </span><span class="c1">// 非常量</span>
|
||
<span class="linenos">18</span><span class="w"> </span><span class="n">input_x</span><span class="p">.</span><span class="n">shape_changed_</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">false</span><span class="p">;</span>
|
||
<span class="linenos">19</span>
|
||
<span class="linenos">20</span><span class="w"> </span><span class="c1">// 初始化 input_y</span>
|
||
<span class="linenos">21</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">y_shape</span><span class="p">[</span><span class="mi">3</span><span class="p">]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">{</span><span class="mi">2</span><span class="p">,</span><span class="w"> </span><span class="mi">3</span><span class="p">,</span><span class="w"> </span><span class="mi">4</span><span class="p">};</span>
|
||
<span class="linenos">22</span><span class="w"> </span><span class="n">memcpy</span><span class="p">(</span><span class="n">input_y</span><span class="p">.</span><span class="n">shape_</span><span class="p">,</span><span class="w"> </span><span class="n">y_shape</span><span class="p">,</span><span class="w"> </span><span class="mi">3</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="k">sizeof</span><span class="p">(</span><span class="kt">int</span><span class="p">));</span>
|
||
<span class="linenos">23</span><span class="w"> </span><span class="n">input_y</span><span class="p">.</span><span class="n">shape_size_</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">3</span><span class="p">;</span>
|
||
<span class="linenos">24</span><span class="w"> </span><span class="n">input_y</span><span class="p">.</span><span class="n">data_type_</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">kNumberTypeFloat32</span><span class="p">;</span>
|
||
<span class="linenos">25</span><span class="w"> </span><span class="n">input_y</span><span class="p">.</span><span class="n">format_</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">Format_NCHW</span><span class="p">;</span>
|
||
<span class="linenos">26</span><span class="w"> </span><span class="n">input_y</span><span class="p">.</span><span class="n">data_</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">(</span><span class="kt">void</span><span class="w"> </span><span class="o">*</span><span class="p">)</span><span class="mh">0xB0000000</span><span class="p">;</span>
|
||
<span class="linenos">27</span><span class="w"> </span><span class="n">input_y</span><span class="p">.</span><span class="n">category_</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span><span class="p">;</span>
|
||
<span class="linenos">28</span><span class="w"> </span><span class="n">input_y</span><span class="p">.</span><span class="n">shape_changed_</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">false</span><span class="p">;</span>
|
||
<span class="linenos">29</span>
|
||
<span class="linenos">30</span><span class="w"> </span><span class="kt">bool</span><span class="w"> </span><span class="n">condition</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">true</span><span class="p">;</span><span class="w"> </span><span class="c1">// 选择 input_x</span>
|
||
<span class="linenos">31</span>
|
||
<span class="hll"><span class="linenos">32</span><span class="w"> </span><span class="n">switch_s</span><span class="p">(</span><span class="o">&</span><span class="n">input_x</span><span class="p">,</span><span class="w"> </span><span class="o">&</span><span class="n">input_y</span><span class="p">,</span><span class="w"> </span><span class="o">&</span><span class="n">output</span><span class="p">,</span><span class="w"> </span><span class="n">condition</span><span class="p">);</span>
|
||
</span><span class="linenos">33</span>
|
||
<span class="linenos">34</span><span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="mi">0</span><span class="p">;</span>
|
||
<span class="linenos">35</span><span class="p">}</span>
|
||
</pre></div>
|
||
</div>
|
||
<p><strong>私有存储版本:</strong></p>
|
||
<dl class="c function">
|
||
<dt class="sig sig-object c" id="c.switch_p">
|
||
<span class="kt"><span class="pre">void</span></span><span class="w"> </span><span class="sig-name descname"><span class="n"><span class="pre">switch_p</span></span></span><span class="sig-paren">(</span><span class="n"><span class="pre">TensorC</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">input_x</span></span>, <span class="n"><span class="pre">TensorC</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">input_y</span></span>, <span class="n"><span class="pre">TensorC</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">output</span></span>, <span class="kt"><span class="pre">bool</span></span><span class="w"> </span><span class="n"><span class="pre">condition</span></span><span class="sig-paren">)</span><a class="headerlink" href="#c.switch_p" title="永久链接至目标"></a><br /></dt>
|
||
<dd></dd></dl>
|
||
|
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<p><strong>C调用示例：</strong></p>
|
||
<div class="highlight-c notranslate"><div class="highlight"><pre><span></span><span class="linenos"> 1</span><span class="c1">//FT78NE示例</span>
|
||
<span class="linenos"> 2</span><span class="cp">#include</span><span class="w"> </span><span class="cpf"><stdio.h></span>
|
||
<span class="linenos"> 3</span><span class="cp">#include</span><span class="w"> </span><span class="cpf"><switch.h></span>
|
||
<span class="linenos"> 4</span>
|
||
<span class="linenos"> 5</span><span class="kt">int</span><span class="w"> </span><span class="nf">main</span><span class="p">(</span><span class="kt">int</span><span class="w"> </span><span class="n">argc</span><span class="p">,</span><span class="w"> </span><span class="kt">char</span><span class="o">*</span><span class="w"> </span><span class="n">argv</span><span class="p">[])</span><span class="w"> </span><span class="p">{</span>
|
||
<span class="linenos"> 6</span><span class="w"> </span><span class="n">TensorC</span><span class="w"> </span><span class="n">input_x</span><span class="p">;</span>
|
||
<span class="linenos"> 7</span><span class="w"> </span><span class="n">TensorC</span><span class="w"> </span><span class="n">input_y</span><span class="p">;</span>
|
||
<span class="linenos"> 8</span><span class="w"> </span><span class="n">TensorC</span><span class="o">*</span><span class="w"> </span><span class="n">output</span><span class="p">;</span>
|
||
<span class="linenos"> 9</span>
|
||
<span class="linenos">10</span><span class="w"> </span><span class="c1">// 初始化 input_x</span>
|
||
<span class="linenos">11</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">x_shape</span><span class="p">[</span><span class="mi">3</span><span class="p">]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">{</span><span class="mi">2</span><span class="p">,</span><span class="w"> </span><span class="mi">3</span><span class="p">,</span><span class="w"> </span><span class="mi">4</span><span class="p">};</span>
|
||
<span class="linenos">12</span><span class="w"> </span><span class="n">memcpy</span><span class="p">(</span><span class="n">input_x</span><span class="p">.</span><span class="n">shape_</span><span class="p">,</span><span class="w"> </span><span class="n">x_shape</span><span class="p">,</span><span class="w"> </span><span class="mi">3</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="k">sizeof</span><span class="p">(</span><span class="kt">int</span><span class="p">));</span>
|
||
<span class="linenos">13</span><span class="w"> </span><span class="n">input_x</span><span class="p">.</span><span class="n">shape_size_</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">3</span><span class="p">;</span>
|
||
<span class="linenos">14</span><span class="w"> </span><span class="n">input_x</span><span class="p">.</span><span class="n">data_type_</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">kNumberTypeFloat32</span><span class="p">;</span>
|
||
<span class="linenos">15</span><span class="w"> </span><span class="n">input_x</span><span class="p">.</span><span class="n">format_</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">Format_NCHW</span><span class="p">;</span>
|
||
<span class="linenos">16</span><span class="w"> </span><span class="n">input_x</span><span class="p">.</span><span class="n">data_</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">(</span><span class="kt">void</span><span class="w"> </span><span class="o">*</span><span class="p">)</span><span class="mh">0x10000000</span><span class="p">;</span>
|
||
<span class="linenos">17</span><span class="w"> </span><span class="n">input_x</span><span class="p">.</span><span class="n">category_</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span><span class="p">;</span><span class="w"> </span><span class="c1">// 非常量</span>
|
||
<span class="linenos">18</span><span class="w"> </span><span class="n">input_x</span><span class="p">.</span><span class="n">shape_changed_</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">false</span><span class="p">;</span>
|
||
<span class="linenos">19</span>
|
||
<span class="linenos">20</span><span class="w"> </span><span class="c1">// 初始化 input_y</span>
|
||
<span class="linenos">21</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">y_shape</span><span class="p">[</span><span class="mi">3</span><span class="p">]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">{</span><span class="mi">2</span><span class="p">,</span><span class="w"> </span><span class="mi">3</span><span class="p">,</span><span class="w"> </span><span class="mi">4</span><span class="p">};</span>
|
||
<span class="linenos">22</span><span class="w"> </span><span class="n">memcpy</span><span class="p">(</span><span class="n">input_y</span><span class="p">.</span><span class="n">shape_</span><span class="p">,</span><span class="w"> </span><span class="n">y_shape</span><span class="p">,</span><span class="w"> </span><span class="mi">3</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="k">sizeof</span><span class="p">(</span><span class="kt">int</span><span class="p">));</span>
|
||
<span class="linenos">23</span><span class="w"> </span><span class="n">input_y</span><span class="p">.</span><span class="n">shape_size_</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">3</span><span class="p">;</span>
|
||
<span class="linenos">24</span><span class="w"> </span><span class="n">input_y</span><span class="p">.</span><span class="n">data_type_</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">kNumberTypeFloat32</span><span class="p">;</span>
|
||
<span class="linenos">25</span><span class="w"> </span><span class="n">input_y</span><span class="p">.</span><span class="n">format_</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">Format_NCHW</span><span class="p">;</span>
|
||
<span class="linenos">26</span><span class="w"> </span><span class="n">input_y</span><span class="p">.</span><span class="n">data_</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">(</span><span class="kt">void</span><span class="w"> </span><span class="o">*</span><span class="p">)</span><span class="mh">0x10001000</span><span class="p">;</span>
|
||
<span class="linenos">27</span><span class="w"> </span><span class="n">input_y</span><span class="p">.</span><span class="n">category_</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span><span class="p">;</span>
|
||
<span class="linenos">28</span><span class="w"> </span><span class="n">input_y</span><span class="p">.</span><span class="n">shape_changed_</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">false</span><span class="p">;</span>
|
||
<span class="linenos">29</span>
|
||
<span class="linenos">30</span><span class="w"> </span><span class="kt">bool</span><span class="w"> </span><span class="n">condition</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">true</span><span class="p">;</span><span class="w"> </span><span class="c1">// 选择 input_x</span>
|
||
<span class="linenos">31</span>
|
||
<span class="hll"><span class="linenos">32</span><span class="w"> </span><span class="n">switch_p</span><span class="p">(</span><span class="o">&</span><span class="n">input_x</span><span class="p">,</span><span class="w"> </span><span class="o">&</span><span class="n">input_y</span><span class="p">,</span><span class="w"> </span><span class="o">&</span><span class="n">output</span><span class="p">,</span><span class="w"> </span><span class="n">condition</span><span class="p">);</span>
|
||
</span><span class="linenos">33</span>
|
||
<span class="linenos">34</span><span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="mi">0</span><span class="p">;</span>
|
||
<span class="linenos">35</span><span class="p">}</span>
|
||
</pre></div>
|
||
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|
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