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<a href="../../index.html">MindSpore Signal+ 使用手册</a>
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<li class="breadcrumb-item"><a href="../index.html">算子库支持</a></li>
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<li class="breadcrumb-item"><a href="dsplib_index.html">DSP Library C API Reference</a></li>
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<li class="breadcrumb-item active">Flatten</li>
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<a href="../../_sources/functionlib/dsplib/flatten.rst.txt" rel="nofollow"> 查看页面源码</a>
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<div itemprop="articleBody">
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<section id="flatten">
|
||
<h1>Flatten<a class="headerlink" href="#flatten" title="此标题的永久链接"></a></h1>
|
||
<p>将多维输入张量按行优先（row-major）顺序展平成一维连续数组。
|
||
该算子仅改变数据的形状，不改变数据内容与顺序，本质上是一次连续内存拷贝操作。</p>
|
||
<p>数学上可表示为：</p>
|
||
<div class="math notranslate nohighlight">
|
||
\[\text{output} = \text{reshape}(\text{input}, [-1])\]</div>
|
||
<p>输入张量的所有元素按照原有存储顺序依次写入输出张量。</p>
|
||
<dl class="simple">
|
||
<dt>输入：</dt><dd><ul class="simple">
|
||
<li><p><strong>input</strong> - 输入数据地址。</p></li>
|
||
<li><p><strong>core_mask</strong> - 核掩码（仅适用于共享存储版本）。</p></li>
|
||
<li><p><strong>param</strong> - Flatten 参数结构体指针，包含形状与类型信息。</p></li>
|
||
</ul>
|
||
</dd>
|
||
<dt>输出：</dt><dd><ul class="simple">
|
||
<li><p><strong>output</strong> - 展平后的输出数据地址。</p></li>
|
||
</ul>
|
||
</dd>
|
||
</dl>
|
||
<p>FlattenParameter 结构体说明：</p>
|
||
<blockquote>
|
||
<div><ul class="simple">
|
||
<li><p><strong>shape_</strong> - 输入张量各维度大小数组。</p></li>
|
||
<li><p><strong>ndim_</strong> - 输入张量维度数。</p></li>
|
||
<li><p><strong>elem_cnt_</strong> - 输入张量元素总数。</p></li>
|
||
<li><p><strong>type_size_</strong> - 单个元素的字节数。</p></li>
|
||
</ul>
|
||
</div></blockquote>
|
||
<dl class="simple">
|
||
<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>FT78NE 支持 <code class="docutils literal notranslate"><span class="pre">fp32</span></code>、<code class="docutils literal notranslate"><span class="pre">fp64</span></code>、<code class="docutils literal notranslate"><span class="pre">int8</span></code>、<code class="docutils literal notranslate"><span class="pre">int16</span></code>、<code class="docutils literal notranslate"><span class="pre">int32</span></code>、<code class="docutils literal notranslate"><span class="pre">cplx64</span></code>、<code class="docutils literal notranslate"><span class="pre">cplx128</span></code></p></li>
|
||
<li><p>MT7004 支持 <code class="docutils literal notranslate"><span class="pre">fp16</span></code>、<code class="docutils literal notranslate"><span class="pre">fp32</span></code>、<code class="docutils literal notranslate"><span class="pre">int16</span></code>、<code class="docutils literal notranslate"><span class="pre">int32</span></code>、<code class="docutils literal notranslate"><span class="pre">cplx64</span></code></p></li>
|
||
<li><p>该算子不涉及数值计算，仅进行内存搬运</p></li>
|
||
<li><p>当 input 与 output 地址相同时，算子直接返回，不执行拷贝</p></li>
|
||
<li><p>当 core_mask 对应的逻辑核无效时，算子直接返回</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.Flatten">
|
||
<span class="kt"><span class="pre">void</span></span><span class="w"> </span><span class="sig-name descname"><span class="n"><span class="pre">Flatten</span></span></span><span class="sig-paren">(</span><span class="k"><span class="pre">const</span></span><span class="w"> </span><span class="kt"><span class="pre">void</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">input</span></span>, <span class="kt"><span class="pre">void</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">output</span></span>, <span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="n"><span class="pre">core_mask</span></span>, <span class="n"><span class="pre">FlattenParameter</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">param</span></span><span class="sig-paren">)</span><a class="headerlink" href="#c.Flatten" 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（共享存储）</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"><flatten.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="kt">float</span><span class="w"> </span><span class="o">*</span><span class="n">input</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">(</span><span class="kt">float</span><span class="w"> </span><span class="o">*</span><span class="p">)</span><span class="mh">0xA0000000</span><span class="p">;</span><span class="w"> </span><span class="c1">// DDR 空间</span>
|
||
<span class="linenos"> 7</span><span class="w"> </span><span class="kt">float</span><span class="w"> </span><span class="o">*</span><span class="n">output</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">(</span><span class="kt">float</span><span class="w"> </span><span class="o">*</span><span class="p">)</span><span class="mh">0xC0000000</span><span class="p">;</span>
|
||
<span class="linenos"> 8</span>
|
||
<span class="linenos"> 9</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">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">1</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">224</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="mi">224</span><span class="p">};</span>
|
||
<span class="linenos">10</span>
|
||
<span class="linenos">11</span><span class="w"> </span><span class="n">FlattenParameter</span><span class="w"> </span><span class="n">param</span><span class="p">;</span>
|
||
<span class="linenos">12</span><span class="w"> </span><span class="n">param</span><span class="p">.</span><span class="n">shape_</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">shape</span><span class="p">;</span>
|
||
<span class="linenos">13</span><span class="w"> </span><span class="n">param</span><span class="p">.</span><span class="n">ndim_</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">param</span><span class="p">.</span><span class="n">elem_cnt_</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">1</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="mi">3</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="mi">224</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="mi">224</span><span class="p">;</span>
|
||
<span class="linenos">15</span><span class="w"> </span><span class="n">param</span><span class="p">.</span><span class="n">type_size_</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">float</span><span class="p">);</span>
|
||
<span class="linenos">16</span>
|
||
<span class="linenos">17</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">core_mask</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mh">0xff</span><span class="p">;</span>
|
||
<span class="hll"><span class="linenos">18</span><span class="w"> </span><span class="n">Flatten</span><span class="p">(</span><span class="n">input</span><span class="p">,</span><span class="w"> </span><span class="n">output</span><span class="p">,</span><span class="w"> </span><span class="n">core_mask</span><span class="p">,</span><span class="w"> </span><span class="o">&</span><span class="n">param</span><span class="p">);</span>
|
||
</span><span class="linenos">19</span>
|
||
<span class="linenos">20</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">21</span><span class="p">}</span>
|
||
</pre></div>
|
||
</div>
|
||
<p><strong>私有存储版本:</strong></p>
|
||
<p>该算子在私有存储模式下等价为单核内存拷贝操作，
|
||
直接调用 <cite>Flatten</cite> 且 core_mask 设置为单核即可。</p>
|
||
<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（私有存储）</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"><flatten.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="kt">float</span><span class="w"> </span><span class="o">*</span><span class="n">input</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">(</span><span class="kt">float</span><span class="w"> </span><span class="o">*</span><span class="p">)</span><span class="mh">0x10810000</span><span class="p">;</span><span class="w"> </span><span class="c1">// L2 空间</span>
|
||
<span class="linenos"> 7</span><span class="w"> </span><span class="kt">float</span><span class="w"> </span><span class="o">*</span><span class="n">output</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">(</span><span class="kt">float</span><span class="w"> </span><span class="o">*</span><span class="p">)</span><span class="mh">0x10820000</span><span class="p">;</span>
|
||
<span class="linenos"> 8</span>
|
||
<span class="linenos"> 9</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">shape</span><span class="p">[</span><span class="mi">2</span><span class="p">]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">{</span><span class="mi">4</span><span class="p">,</span><span class="w"> </span><span class="mi">256</span><span class="p">};</span>
|
||
<span class="linenos">10</span>
|
||
<span class="linenos">11</span><span class="w"> </span><span class="n">FlattenParameter</span><span class="w"> </span><span class="n">param</span><span class="p">;</span>
|
||
<span class="linenos">12</span><span class="w"> </span><span class="n">param</span><span class="p">.</span><span class="n">shape_</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">shape</span><span class="p">;</span>
|
||
<span class="linenos">13</span><span class="w"> </span><span class="n">param</span><span class="p">.</span><span class="n">ndim_</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">2</span><span class="p">;</span>
|
||
<span class="linenos">14</span><span class="w"> </span><span class="n">param</span><span class="p">.</span><span class="n">elem_cnt_</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">4</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="mi">256</span><span class="p">;</span>
|
||
<span class="linenos">15</span><span class="w"> </span><span class="n">param</span><span class="p">.</span><span class="n">type_size_</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">float</span><span class="p">);</span>
|
||
<span class="linenos">16</span>
|
||
<span class="hll"><span class="linenos">17</span><span class="w"> </span><span class="n">Flatten</span><span class="p">(</span><span class="n">input</span><span class="p">,</span><span class="w"> </span><span class="n">output</span><span class="p">,</span><span class="w"> </span><span class="mh">0x1</span><span class="p">,</span><span class="w"> </span><span class="o">&</span><span class="n">param</span><span class="p">);</span>
|
||
</span><span class="linenos">18</span>
|
||
<span class="linenos">19</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">20</span><span class="p">}</span>
|
||
</pre></div>
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