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MindSpore Signal+ 使用手册
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<div itemprop="articleBody">
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<section id="round">
|
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<h1>Round<a class="headerlink" href="#round" title="此标题的永久链接"></a></h1>
|
||
<p>逐元素执行四舍五入（Round to Nearest Integer）运算。</p>
|
||
<p>该算子对输入张量的每个元素执行就近取整，
|
||
当输入值的小数部分恰好为 0.5 时，采用“远离 0”方向取整，
|
||
其行为与 C 标准库中的 <code class="docutils literal notranslate"><span class="pre">round</span></code> / <code class="docutils literal notranslate"><span class="pre">roundf</span></code> 函数一致。</p>
|
||
<div class="math notranslate nohighlight">
|
||
\[\text{output}_i = \operatorname{round}(\text{input}_i)\]</div>
|
||
<dl class="simple">
|
||
<dt>输入：</dt><dd><ul class="simple">
|
||
<li><p><strong>input</strong> - 输入张量的数据地址。</p></li>
|
||
<li><p><strong>length</strong> - 输入张量的总元素数量。</p></li>
|
||
<li><p><strong>core_mask</strong> - 核掩码。</p></li>
|
||
</ul>
|
||
</dd>
|
||
<dt>输出：</dt><dd><ul class="simple">
|
||
<li><p><strong>output</strong> - 输出张量的数据地址，其大小与 <code class="docutils literal notranslate"><span class="pre">input</span></code> 相同。</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 支持的数据类型：fp32, fp64</p></li>
|
||
<li><p>MT7004 支持的数据类型：fp16, fp32</p></li>
|
||
<li><p>当输入为 <code class="docutils literal notranslate"><span class="pre">±∞</span></code> 或 <code class="docutils literal notranslate"><span class="pre">NaN</span></code> 时，输出结果遵循对应平台数学库的处理规则</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_round_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_round_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">input</span></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">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_round_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.dp_round_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">dp_round_s</span></span></span><span class="sig-paren">(</span><span class="kt"><span class="pre">double</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">double</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">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.dp_round_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_round_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_round_s</span></span></span><span class="sig-paren">(</span><span class="n"><span class="pre">half</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="n"><span class="pre">half</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">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.hp_round_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 多核示例</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"><round.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">// input 在 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">0xB0000000</span><span class="p">;</span><span class="w"> </span><span class="c1">// output 在 DDR 空间</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">length</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">4096</span><span class="p">;</span>
|
||
<span class="linenos">10</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">11</span>
|
||
<span class="hll"><span class="linenos">12</span><span class="w"> </span><span class="n">fp_round_s</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">length</span><span class="p">,</span><span class="w"> </span><span class="n">core_mask</span><span class="p">);</span>
|
||
</span><span class="linenos">13</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">14</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_round_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_round_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">input</span></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">int</span></span><span class="w"> </span><span class="n"><span class="pre">length</span></span><span class="sig-paren">)</span><a class="headerlink" href="#c.fp_round_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.dp_round_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">dp_round_p</span></span></span><span class="sig-paren">(</span><span class="kt"><span class="pre">double</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">double</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">length</span></span><span class="sig-paren">)</span><a class="headerlink" href="#c.dp_round_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_round_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_round_p</span></span></span><span class="sig-paren">(</span><span class="n"><span class="pre">half</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="n"><span class="pre">half</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">length</span></span><span class="sig-paren">)</span><a class="headerlink" href="#c.hp_round_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="c1">// MT7004 单核示例</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"><round.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">half</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="n">half</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">// input 在 L2 空间</span>
|
||
<span class="linenos"> 7</span><span class="w"> </span><span class="n">half</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="n">half</span><span class="w"> </span><span class="o">*</span><span class="p">)</span><span class="mh">0x10010000</span><span class="p">;</span><span class="w"> </span><span class="c1">// output 在 L2 空间</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">length</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">1024</span><span class="p">;</span>
|
||
<span class="linenos">10</span>
|
||
<span class="hll"><span class="linenos">11</span><span class="w"> </span><span class="n">hp_round_p</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">length</span><span class="p">);</span>
|
||
</span><span class="linenos">12</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">13</span><span class="p">}</span>
|
||
</pre></div>
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