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MindSpore Signal+ 使用手册
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<li class="toctree-l1"><a class="reference internal" href="../../quickstart/index.html">快速入门</a></li>
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<li class="toctree-l3"><a class="reference internal" href="abs_grad.html">AbsGrad</a></li>
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<li class="toctree-l3"><a class="reference internal" href="flatten.html">Flatten</a></li>
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<li class="toctree-l3"><a class="reference internal" href="flattengrad.html">FlattenGrad</a></li>
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<li class="toctree-l3"><a class="reference internal" href="loggrad.html">LogGrad</a></li>
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<li class="toctree-l3"><a class="reference internal" href="lstm.html">LSTM</a></li>
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<li class="toctree-l3 current"><a class="current reference internal" href="#">LstmGrad</a></li>
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<li class="toctree-l3"><a class="reference internal" href="lstmgraddata.html">LstmGradData</a></li>
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<li class="toctree-l3"><a class="reference internal" href="lstmgradweight.html">LstmGradWeight</a></li>
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<li class="toctree-l3"><a class="reference internal" href="matmul_fusion.html">MatMulFusion</a></li>
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<li class="toctree-l3"><a class="reference internal" href="maximum.html">Maximum</a></li>
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<li class="toctree-l3"><a class="reference internal" href="maxpoolgrad.html">MaxPoolGrad</a></li>
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<li class="toctree-l3"><a class="reference internal" href="neg_grad.html">NegGrad</a></li>
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<li class="toctree-l3"><a class="reference internal" href="nlllossgrad.html">NLLLossGrad</a></li>
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<li class="toctree-l3"><a class="reference internal" href="power_grad.html">PowerGrad</a></li>
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<li class="toctree-l3"><a class="reference internal" href="prelufusion.html">PReLUFusion</a></li>
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<li class="toctree-l3"><a class="reference internal" href="random_normal.html">RandomNormal</a></li>
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<li class="toctree-l3"><a class="reference internal" href="random_standard_normal.html">RandomStandardNormal</a></li>
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<li class="toctree-l3"><a class="reference internal" href="range.html">Range</a></li>
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<li class="toctree-l3"><a class="reference internal" href="rank.html">Rank</a></li>
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<li class="toctree-l3"><a class="reference internal" href="reciprocal.html">Reciprocal</a></li>
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<li class="toctree-l3"><a class="reference internal" href="reduce.html">Reduce</a></li>
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<li class="toctree-l3"><a class="reference internal" href="reshape.html">Reshape</a></li>
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<li class="toctree-l3"><a class="reference internal" href="resize.html">Resize</a></li>
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<li class="toctree-l3"><a class="reference internal" href="resizegrad.html">Resizegrad</a></li>
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<li class="toctree-l3"><a class="reference internal" href="rsqrt.html">Rsqrt</a></li>
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<li class="toctree-l3"><a class="reference internal" href="rsqrt_grad.html">RsqrtGrad</a></li>
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<li class="toctree-l3"><a class="reference internal" href="scatter_nd.html">ScatterNd</a></li>
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<li class="toctree-l3"><a class="reference internal" href="scatter_nd_update.html">ScatterNdUpdate</a></li>
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<li class="toctree-l3"><a class="reference internal" href="select.html">Select</a></li>
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<li class="toctree-l3"><a class="reference internal" href="sgd.html">SGD</a></li>
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<li class="toctree-l3"><a class="reference internal" href="shape.html">Shape</a></li>
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<a href="../../_sources/functionlib/dsplib/lstmgrad.rst.txt" rel="nofollow"> 查看页面源码</a>
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<section id="lstmgrad">
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<h1>LstmGrad<a class="headerlink" href="#lstmgrad" title="此标题的永久链接"></a></h1>
|
||
<p>计算 LSTM 网络的梯度，包括对输入、隐藏状态、细胞状态以及门控的梯度反向传播。</p>
|
||
<div class="math notranslate nohighlight">
|
||
\[\begin{split}dH_t &= dY_t + dH_{t+1} \\
|
||
dC_t &= dC_{t+1} \odot f_{t+1} + dH_t \odot o_t \odot (1 - \tanh^2(C_t)) \\
|
||
dX_t &= dA_t \cdot W^T \\
|
||
dW &= \sum_t dA_t \cdot X_t^T \\
|
||
dU &= \sum_t dA_t \cdot H_{t-1}^T \\
|
||
dA_t &= dH_t \odot o_t \odot (1 - \tanh^2(C_t)) \odot g'_t\end{split}\]</div>
|
||
<p>其中：</p>
|
||
<ul class="simple">
|
||
<li><p>(dH_t) 表示隐藏状态的梯度。</p></li>
|
||
<li><p>(dC_t) 表示细胞状态的梯度。</p></li>
|
||
<li><p>(dX_t) 表示输入梯度。</p></li>
|
||
<li><p>(dW, dU) 分别表示输入权重和隐藏状态权重的梯度。</p></li>
|
||
<li><p>(dA_t) 表示门控单元梯度。</p></li>
|
||
<li><p>(f_t, o_t, C_t, g_t) 分别为遗忘门、输出门、细胞状态、输入门的前向值。</p></li>
|
||
<li><p>(odot) 表示元素逐乘。</p></li>
|
||
</ul>
|
||
<dl class="simple">
|
||
<dt>输入：</dt><dd><ul class="simple">
|
||
<li><p><strong>params</strong> - 静态参数数组，包含 LSTM 网络配置、权重、状态指针等。</p></li>
|
||
<li><p><strong>dynamic_params</strong> - 动态参数数组，用于存储运行时指针及中间梯度。</p></li>
|
||
</ul>
|
||
</dd>
|
||
<dt>输出：</dt><dd><ul class="simple">
|
||
<li><p><strong>dX_</strong> - 输入梯度。</p></li>
|
||
<li><p><strong>dH_</strong> - 隐藏状态梯度。</p></li>
|
||
<li><p><strong>dC_</strong> - 细胞状态梯度。</p></li>
|
||
<li><p><strong>dA_tmp_</strong> - 门控梯度中间缓存。</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>FT78NE 支持 fp</p></li>
|
||
<li><p>MT7004 支持 hp, fp</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.fp_lstmgrad_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">fp_lstmgrad_s</span></span></span><span class="sig-paren">(</span><span class="kt"><span class="pre">long</span></span><span class="w"> </span><span class="kt"><span class="pre">long</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">params</span></span>, <span class="kt"><span class="pre">long</span></span><span class="w"> </span><span class="kt"><span class="pre">long</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">dynamic_params</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="sig-paren">)</span><a class="headerlink" href="#c.fp_lstmgrad_s" title="永久链接至目标"></a><br /></dt>
|
||
<dd></dd></dl>
|
||
|
||
<dl class="c function">
|
||
<dt class="sig sig-object c" id="c.hp_lstmgrad_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">hp_lstmgrad_s</span></span></span><span class="sig-paren">(</span><span class="kt"><span class="pre">long</span></span><span class="w"> </span><span class="kt"><span class="pre">long</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">params</span></span>, <span class="kt"><span class="pre">long</span></span><span class="w"> </span><span class="kt"><span class="pre">long</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">dynamic_params</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="sig-paren">)</span><a class="headerlink" href="#c.hp_lstmgrad_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="cp">#include</span><span class="w"> </span><span class="cpf"><stdio.h></span>
|
||
<span class="linenos"> 2</span><span class="cp">#include</span><span class="w"> </span><span class="cpf"><lstmgrad.h></span>
|
||
<span class="linenos"> 3</span>
|
||
<span class="linenos"> 4</span><span class="kt">int</span><span class="w"> </span><span class="nf">main</span><span class="p">()</span><span class="w"> </span><span class="p">{</span>
|
||
<span class="linenos"> 5</span><span class="w"> </span><span class="kt">long</span><span class="w"> </span><span class="kt">long</span><span class="w"> </span><span class="n">params</span><span class="p">[</span><span class="mi">32</span><span class="p">];</span>
|
||
<span class="linenos"> 6</span><span class="w"> </span><span class="kt">long</span><span class="w"> </span><span class="kt">long</span><span class="w"> </span><span class="n">dynamic_params</span><span class="p">[</span><span class="mi">32</span><span class="p">];</span>
|
||
<span class="linenos"> 7</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="linenos"> 8</span>
|
||
<span class="linenos"> 9</span><span class="w"> </span><span class="c1">// 初始化 params 和 dynamic_params</span>
|
||
<span class="hll"><span class="linenos">10</span><span class="w"> </span><span class="n">fp_lstmgrad_s</span><span class="p">(</span><span class="n">params</span><span class="p">,</span><span class="w"> </span><span class="n">dynamic_params</span><span class="p">,</span><span class="w"> </span><span class="n">core_mask</span><span class="p">);</span>
|
||
</span><span class="linenos">11</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">12</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.fp_lstmgrad_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">fp_lstmgrad_p</span></span></span><span class="sig-paren">(</span><span class="kt"><span class="pre">long</span></span><span class="w"> </span><span class="kt"><span class="pre">long</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">params</span></span>, <span class="kt"><span class="pre">long</span></span><span class="w"> </span><span class="kt"><span class="pre">long</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">dynamic_params</span></span><span class="sig-paren">)</span><a class="headerlink" href="#c.fp_lstmgrad_p" title="永久链接至目标"></a><br /></dt>
|
||
<dd></dd></dl>
|
||
|
||
<dl class="c function">
|
||
<dt class="sig sig-object c" id="c.hp_lstmgrad_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">hp_lstmgrad_p</span></span></span><span class="sig-paren">(</span><span class="kt"><span class="pre">long</span></span><span class="w"> </span><span class="kt"><span class="pre">long</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">params</span></span>, <span class="kt"><span class="pre">long</span></span><span class="w"> </span><span class="kt"><span class="pre">long</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">dynamic_params</span></span><span class="sig-paren">)</span><a class="headerlink" href="#c.hp_lstmgrad_p" 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="cp">#include</span><span class="w"> </span><span class="cpf"><stdio.h></span>
|
||
<span class="linenos"> 2</span><span class="cp">#include</span><span class="w"> </span><span class="cpf"><lstmgrad.h></span>
|
||
<span class="linenos"> 3</span>
|
||
<span class="linenos"> 4</span><span class="kt">int</span><span class="w"> </span><span class="nf">main</span><span class="p">()</span><span class="w"> </span><span class="p">{</span>
|
||
<span class="linenos"> 5</span><span class="w"> </span><span class="kt">long</span><span class="w"> </span><span class="kt">long</span><span class="w"> </span><span class="n">params</span><span class="p">[</span><span class="mi">32</span><span class="p">];</span>
|
||
<span class="linenos"> 6</span><span class="w"> </span><span class="kt">long</span><span class="w"> </span><span class="kt">long</span><span class="w"> </span><span class="n">dynamic_params</span><span class="p">[</span><span class="mi">32</span><span class="p">];</span>
|
||
<span class="linenos"> 7</span>
|
||
<span class="linenos"> 8</span><span class="w"> </span><span class="c1">// 初始化 params 和 dynamic_params</span>
|
||
<span class="hll"><span class="linenos"> 9</span><span class="w"> </span><span class="n">fp_lstmgrad_p</span><span class="p">(</span><span class="n">params</span><span class="p">,</span><span class="w"> </span><span class="n">dynamic_params</span><span class="p">);</span>
|
||
</span><span class="linenos">10</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">11</span><span class="p">}</span>
|
||
</pre></div>
|
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</div>
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