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MindSpore Signal+ 使用手册
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<a href="../../_sources/functionlib/dsplib/linspace.rst.txt" rel="nofollow"> 查看页面源码</a>
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<section id="linspace">
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<h1>LinSpace<a class="headerlink" href="#linspace" title="Link to this heading"></a></h1>
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<p>生成从 <code class="docutils literal notranslate"><span class="pre">start</span></code> 到 <code class="docutils literal notranslate"><span class="pre">end</span></code> 的等间距序列，线性插值</p>
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<div class="math notranslate nohighlight">
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\[\text{output}_i = \text{start} + i \cdot \frac{\text{end} - \text{start}}{\text{length} - 1},\quad i = 0, 1, \dots, \text{length} - 1\]</div>
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<dl class="simple">
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<dt>输入：</dt><dd><ul class="simple">
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<li><p><strong>start</strong> - 序列起始值。</p></li>
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<li><p><strong>end</strong> - 序列终止值（包含）。</p></li>
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<li><p><strong>length</strong> - 序列点数；要求 length ≥ 2。</p></li>
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<li><p><strong>core_mask（可选）</strong> - 核掩码（仅适用于共享存储版本）。</p></li>
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</ul>
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</dd>
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<dt>输出：</dt><dd><ul class="simple">
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<li><p><strong>output</strong> - 输出序列地址（float32）。</p></li>
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</ul>
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</dd>
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<dt>支持平台：</dt><dd><p><code class="docutils literal notranslate"><span class="pre">FT78NE</span></code>
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<code class="docutils literal notranslate"><span class="pre">MT7004</span></code></p>
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</dd>
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</dl>
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<div class="admonition note">
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<p class="admonition-title">备注</p>
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<ul class="simple">
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<li><p>多核版本按行数均匀分割，各核处理自己的段落。</p></li>
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<li><p>步长计算为 (end - start) / (length - 1)。</p></li>
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</ul>
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</div>
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<p><strong>共享存储版本：</strong></p>
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<dl class="c function">
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<dt class="sig sig-object c" id="c.fp_linspace_s">
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<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_linspace_s</span></span></span><span class="sig-paren">(</span><span class="kt"><span class="pre">float</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">float</span></span><span class="w"> </span><span class="n"><span class="pre">start</span></span>, <span class="kt"><span class="pre">float</span></span><span class="w"> </span><span class="n"><span class="pre">end</span></span>, <span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="n"><span class="pre">length</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_linspace_s" title="Link to this definition"></a><br /></dt>
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<dd><p><strong>C调用示例：</strong></p>
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<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>
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<span class="linenos"> 2</span>
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<span class="linenos"> 3</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>
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<span class="linenos"> 4</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">0xA0000000</span><span class="p">;</span><span class="w"> </span><span class="c1">// DDR</span>
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<span class="linenos"> 5</span><span class="w"> </span><span class="kt">float</span><span class="w"> </span><span class="n">start</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mf">0.0f</span><span class="p">;</span>
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<span class="linenos"> 6</span><span class="w"> </span><span class="kt">float</span><span class="w"> </span><span class="n">end</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mf">100.0f</span><span class="p">;</span>
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<span class="linenos"> 7</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">length</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">1001</span><span class="p">;</span>
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<span class="linenos"> 8</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>
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<span class="hll"><span class="linenos"> 9</span><span class="w"> </span><span class="n">fp_linspace_s</span><span class="p">(</span><span class="n">output</span><span class="p">,</span><span class="w"> </span><span class="n">start</span><span class="p">,</span><span class="w"> </span><span class="n">end</span><span class="p">,</span><span class="w"> </span><span class="n">length</span><span class="p">,</span><span class="w"> </span><span class="n">core_mask</span><span class="p">);</span>
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</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>
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<span class="linenos">11</span><span class="p">}</span>
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</pre></div>
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</div>
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</dd></dl>
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<p><strong>私有存储版本：</strong></p>
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<dl class="c function">
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<dt class="sig sig-object c" id="c.fp_linspace_p">
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<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_linspace_p</span></span></span><span class="sig-paren">(</span><span class="kt"><span class="pre">float</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">float</span></span><span class="w"> </span><span class="n"><span class="pre">start</span></span>, <span class="kt"><span class="pre">float</span></span><span class="w"> </span><span class="n"><span class="pre">step</span></span>, <span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="n"><span class="pre">num</span></span><span class="sig-paren">)</span><a class="headerlink" href="#c.fp_linspace_p" title="Link to this definition"></a><br /></dt>
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<dd><p><strong>C调用示例：</strong></p>
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<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>
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<span class="linenos"> 2</span>
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<span class="linenos"> 3</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>
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<span class="linenos"> 4</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">0x10000000</span><span class="p">;</span><span class="w"> </span><span class="c1">// L2</span>
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<span class="linenos"> 5</span><span class="w"> </span><span class="kt">float</span><span class="w"> </span><span class="n">start</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mf">1.5f</span><span class="p">;</span>
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<span class="linenos"> 6</span><span class="w"> </span><span class="kt">float</span><span class="w"> </span><span class="n">step</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mf">0.5f</span><span class="p">;</span>
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<span class="linenos"> 7</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">num</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">1000</span><span class="p">;</span>
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<span class="hll"><span class="linenos"> 8</span><span class="w"> </span><span class="n">fp_linspace_p</span><span class="p">(</span><span class="n">output</span><span class="p">,</span><span class="w"> </span><span class="n">start</span><span class="p">,</span><span class="w"> </span><span class="n">step</span><span class="p">,</span><span class="w"> </span><span class="n">num</span><span class="p">);</span>
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</span><span class="linenos"> 9</span><span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="mi">0</span><span class="p">;</span>
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<span class="linenos">10</span><span class="p">}</span>
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</pre></div>
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