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  <div class="section" id="waitcnt">
<span id="amdgpu-synid-gfx90a-waitcnt"></span><h1>waitcnt<a class="headerlink" href="#waitcnt" title="Permalink to this headline">ΒΆ</a></h1>
<p>Counts of outstanding instructions to wait for.</p>
<p>The bits of this operand have the following meaning:</p>
<blockquote>
<div><table class="docutils align-default">
<colgroup>
<col style="width: 13%" />
<col style="width: 11%" />
<col style="width: 61%" />
<col style="width: 15%" />
</colgroup>
<thead>
<tr class="row-odd"><th class="head"><p>High Bits</p></th>
<th class="head"><p>Low Bits</p></th>
<th class="head"><p>Description</p></th>
<th class="head"><p>Value Range</p></th>
</tr>
</thead>
<tbody>
<tr class="row-even"><td><p>15:14</p></td>
<td><p>3:0</p></td>
<td><p>VM_CNT: vector memory operations count.</p></td>
<td><p>0..63</p></td>
</tr>
<tr class="row-odd"><td><p>-</p></td>
<td><p>6:4</p></td>
<td><p>EXP_CNT: export count.</p></td>
<td><p>0..7</p></td>
</tr>
<tr class="row-even"><td><p>-</p></td>
<td><p>11:8</p></td>
<td><p>LGKM_CNT: LDS, GDS, Constant and Message count.</p></td>
<td><p>0..15</p></td>
</tr>
</tbody>
</table>
</div></blockquote>
<p>This operand may be specified as one of the following:</p>
<ul>
<li><p>An <a class="reference internal" href="../AMDGPUOperandSyntax.html#amdgpu-synid-integer-number"><span class="std std-ref">integer_number</span></a> or an <a class="reference internal" href="../AMDGPUOperandSyntax.html#amdgpu-synid-absolute-expression"><span class="std std-ref">absolute_expression</span></a>. The value must be in the range 0..0xFFFF.</p></li>
<li><p>A combination of <em>vmcnt</em>, <em>expcnt</em>, <em>lgkmcnt</em> and other values described below.</p>
<blockquote>
<div><table class="docutils align-default">
<colgroup>
<col style="width: 24%" />
<col style="width: 76%" />
</colgroup>
<thead>
<tr class="row-odd"><th class="head"><p>Syntax</p></th>
<th class="head"><p>Description</p></th>
</tr>
</thead>
<tbody>
<tr class="row-even"><td><p>vmcnt(&lt;<em>N</em>&gt;)</p></td>
<td><p>A VM_CNT value. <em>N</em> must not exceed the largest VM_CNT value.</p></td>
</tr>
<tr class="row-odd"><td><p>expcnt(&lt;<em>N</em>&gt;)</p></td>
<td><p>An EXP_CNT value. <em>N</em> must not exceed the largest EXP_CNT value.</p></td>
</tr>
<tr class="row-even"><td><p>lgkmcnt(&lt;<em>N</em>&gt;)</p></td>
<td><p>An LGKM_CNT value. <em>N</em> must not exceed the largest LGKM_CNT value.</p></td>
</tr>
<tr class="row-odd"><td><p>vmcnt_sat(&lt;<em>N</em>&gt;)</p></td>
<td><p>A VM_CNT value computed as min(<em>N</em>, the largest VM_CNT value).</p></td>
</tr>
<tr class="row-even"><td><p>expcnt_sat(&lt;<em>N</em>&gt;)</p></td>
<td><p>An EXP_CNT value computed as min(<em>N</em>, the largest EXP_CNT value).</p></td>
</tr>
<tr class="row-odd"><td><p>lgkmcnt_sat(&lt;<em>N</em>&gt;)</p></td>
<td><p>An LGKM_CNT value computed as min(<em>N</em>, the largest LGKM_CNT value).</p></td>
</tr>
</tbody>
</table>
</div></blockquote>
</li>
</ul>
<p>These values may be specified in any order. Spaces, ampersands and commas may be used as optional separators.</p>
<p><em>N</em> is either an
<a class="reference internal" href="../AMDGPUOperandSyntax.html#amdgpu-synid-integer-number"><span class="std std-ref">integer number</span></a> or an
<a class="reference internal" href="../AMDGPUOperandSyntax.html#amdgpu-synid-absolute-expression"><span class="std std-ref">absolute expression</span></a>.</p>
<p>Examples:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">vm_cnt</span> <span class="o">=</span> <span class="mi">1</span>
<span class="n">exp_cnt</span> <span class="o">=</span> <span class="mi">2</span>
<span class="n">lgkm_cnt</span> <span class="o">=</span> <span class="mi">3</span>
<span class="n">cnt</span> <span class="o">=</span> <span class="n">vm_cnt</span> <span class="o">|</span> <span class="p">(</span><span class="n">exp_cnt</span> <span class="o">&lt;&lt;</span> <span class="mi">4</span><span class="p">)</span> <span class="o">|</span> <span class="p">(</span><span class="n">lgkm_cnt</span> <span class="o">&lt;&lt;</span> <span class="mi">8</span><span class="p">)</span>

<span class="n">s_waitcnt</span> <span class="n">cnt</span>
<span class="n">s_waitcnt</span> <span class="mi">1</span> <span class="o">|</span> <span class="p">(</span><span class="mi">2</span> <span class="o">&lt;&lt;</span> <span class="mi">4</span><span class="p">)</span> <span class="o">|</span> <span class="p">(</span><span class="mi">3</span> <span class="o">&lt;&lt;</span> <span class="mi">8</span><span class="p">)</span>                          <span class="o">//</span> <span class="n">the</span> <span class="n">same</span> <span class="k">as</span> <span class="n">above</span>
<span class="n">s_waitcnt</span> <span class="n">vmcnt</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span> <span class="n">expcnt</span><span class="p">(</span><span class="mi">2</span><span class="p">)</span> <span class="n">lgkmcnt</span><span class="p">(</span><span class="mi">3</span><span class="p">)</span>                    <span class="o">//</span> <span class="n">the</span> <span class="n">same</span> <span class="k">as</span> <span class="n">above</span>
<span class="n">s_waitcnt</span> <span class="n">vmcnt</span><span class="p">(</span><span class="n">vm_cnt</span><span class="p">)</span> <span class="n">expcnt</span><span class="p">(</span><span class="n">exp_cnt</span><span class="p">)</span> <span class="n">lgkmcnt</span><span class="p">(</span><span class="n">lgkm_cnt</span><span class="p">)</span>  <span class="o">//</span> <span class="n">the</span> <span class="n">same</span> <span class="k">as</span> <span class="n">above</span>

<span class="n">s_waitcnt</span> <span class="n">vmcnt</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span>
<span class="n">s_waitcnt</span> <span class="n">expcnt</span><span class="p">(</span><span class="mi">2</span><span class="p">)</span> <span class="n">lgkmcnt</span><span class="p">(</span><span class="mi">3</span><span class="p">)</span>
<span class="n">s_waitcnt</span> <span class="n">vmcnt</span><span class="p">(</span><span class="mi">1</span><span class="p">),</span> <span class="n">expcnt</span><span class="p">(</span><span class="mi">2</span><span class="p">),</span> <span class="n">lgkmcnt</span><span class="p">(</span><span class="mi">3</span><span class="p">)</span>
<span class="n">s_waitcnt</span> <span class="n">vmcnt</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span> <span class="o">&amp;</span> <span class="n">lgkmcnt_sat</span><span class="p">(</span><span class="mi">100</span><span class="p">)</span> <span class="o">&amp;</span> <span class="n">expcnt</span><span class="p">(</span><span class="mi">2</span><span class="p">)</span>
</pre></div>
</div>
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