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  <div class="section" id="msg">
<span id="amdgpu-synid7-msg"></span><h1>msg<a class="headerlink" href="#msg" title="Permalink to this headline">ΒΆ</a></h1>
<p>A 16-bit message code. The bits of this operand have the following meaning:</p>
<blockquote>
<div><table border="1" class="docutils">
<colgroup>
<col width="18%" />
<col width="82%" />
</colgroup>
<thead valign="bottom">
<tr class="row-odd"><th class="head">Bits</th>
<th class="head">Description</th>
</tr>
</thead>
<tbody valign="top">
<tr class="row-even"><td>3:0</td>
<td>Message <em>type</em>.</td>
</tr>
<tr class="row-odd"><td>6:4</td>
<td>Optional <em>operation</em>.</td>
</tr>
<tr class="row-even"><td>9:7</td>
<td>Optional <em>parameters</em>.</td>
</tr>
<tr class="row-odd"><td>15:10</td>
<td>Unused.</td>
</tr>
</tbody>
</table>
</div></blockquote>
<p>This operand may be specified as a positive 16-bit <a class="reference internal" href="../AMDGPUOperandSyntax.html#amdgpu-synid-integer-number"><span class="std std-ref">integer_number</span></a> or using the syntax described below:</p>
<blockquote>
<div><table border="1" class="docutils">
<colgroup>
<col width="36%" />
<col width="64%" />
</colgroup>
<thead valign="bottom">
<tr class="row-odd"><th class="head">Syntax</th>
<th class="head">Description</th>
</tr>
</thead>
<tbody valign="top">
<tr class="row-even"><td>sendmsg(&lt;<em>type</em>&gt;)</td>
<td>A message identified by its <em>type</em>.</td>
</tr>
<tr class="row-odd"><td>sendmsg(&lt;<em>type</em>&gt;, &lt;<em>op</em>&gt;)</td>
<td>A message identified by its <em>type</em> and <em>operation</em>.</td>
</tr>
<tr class="row-even"><td>sendmsg(&lt;<em>type</em>&gt;, &lt;<em>op</em>&gt;, &lt;<em>stream</em>&gt;)</td>
<td>A message identified by its <em>type</em> and <em>operation</em> with a stream <em>id</em>.</td>
</tr>
</tbody>
</table>
</div></blockquote>
<p><em>Type</em> may be specified using message <em>name</em> or message <em>id</em>.</p>
<p><em>Op</em> may be specified using operation <em>name</em> or operation <em>id</em>.</p>
<p>Stream <em>id</em> is an integer in the range 0..3.</p>
<p>Message <em>id</em>, operation <em>id</em> and stream <em>id</em> must be specified as positive <a class="reference internal" href="../AMDGPUOperandSyntax.html#amdgpu-synid-integer-number"><span class="std std-ref">integer numbers</span></a>.</p>
<p>Each message type supports specific operations:</p>
<blockquote>
<div><table border="1" class="docutils">
<colgroup>
<col width="22%" />
<col width="13%" />
<col width="38%" />
<col width="15%" />
<col width="13%" />
</colgroup>
<thead valign="bottom">
<tr class="row-odd"><th class="head">Message name</th>
<th class="head">Message Id</th>
<th class="head">Supported Operations</th>
<th class="head">Operation Id</th>
<th class="head">Stream Id</th>
</tr>
</thead>
<tbody valign="top">
<tr class="row-even"><td>MSG_INTERRUPT</td>
<td>1</td>
<td>-</td>
<td>-</td>
<td>-</td>
</tr>
<tr class="row-odd"><td>MSG_GS</td>
<td>2</td>
<td>GS_OP_CUT</td>
<td>1</td>
<td>Optional</td>
</tr>
<tr class="row-even"><td></td>
<td>&#160;</td>
<td>GS_OP_EMIT</td>
<td>2</td>
<td>Optional</td>
</tr>
<tr class="row-odd"><td></td>
<td>&#160;</td>
<td>GS_OP_EMIT_CUT</td>
<td>3</td>
<td>Optional</td>
</tr>
<tr class="row-even"><td>MSG_GS_DONE</td>
<td>3</td>
<td>GS_OP_NOP</td>
<td>0</td>
<td>-</td>
</tr>
<tr class="row-odd"><td></td>
<td>&#160;</td>
<td>GS_OP_CUT</td>
<td>1</td>
<td>Optional</td>
</tr>
<tr class="row-even"><td></td>
<td>&#160;</td>
<td>GS_OP_EMIT</td>
<td>2</td>
<td>Optional</td>
</tr>
<tr class="row-odd"><td></td>
<td>&#160;</td>
<td>GS_OP_EMIT_CUT</td>
<td>3</td>
<td>Optional</td>
</tr>
<tr class="row-even"><td>MSG_SYSMSG</td>
<td>15</td>
<td>SYSMSG_OP_ECC_ERR_INTERRUPT</td>
<td>1</td>
<td>-</td>
</tr>
<tr class="row-odd"><td></td>
<td>&#160;</td>
<td>SYSMSG_OP_REG_RD</td>
<td>2</td>
<td>-</td>
</tr>
<tr class="row-even"><td></td>
<td>&#160;</td>
<td>SYSMSG_OP_HOST_TRAP_ACK</td>
<td>3</td>
<td>-</td>
</tr>
<tr class="row-odd"><td></td>
<td>&#160;</td>
<td>SYSMSG_OP_TTRACE_PC</td>
<td>4</td>
<td>-</td>
</tr>
</tbody>
</table>
</div></blockquote>
<p>Examples:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">s_sendmsg</span> <span class="mh">0x12</span>
<span class="n">s_sendmsg</span> <span class="n">sendmsg</span><span class="p">(</span><span class="n">MSG_INTERRUPT</span><span class="p">)</span>
<span class="n">s_sendmsg</span> <span class="n">sendmsg</span><span class="p">(</span><span class="mi">2</span><span class="p">,</span> <span class="n">GS_OP_CUT</span><span class="p">)</span>
<span class="n">s_sendmsg</span> <span class="n">sendmsg</span><span class="p">(</span><span class="n">MSG_GS</span><span class="p">,</span> <span class="n">GS_OP_EMIT</span><span class="p">)</span>
<span class="n">s_sendmsg</span> <span class="n">sendmsg</span><span class="p">(</span><span class="n">MSG_GS</span><span class="p">,</span> <span class="mi">2</span><span class="p">)</span>
<span class="n">s_sendmsg</span> <span class="n">sendmsg</span><span class="p">(</span><span class="n">MSG_GS_DONE</span><span class="p">,</span> <span class="n">GS_OP_EMIT_CUT</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span>
<span class="n">s_sendmsg</span> <span class="n">sendmsg</span><span class="p">(</span><span class="n">MSG_SYSMSG</span><span class="p">,</span> <span class="n">SYSMSG_OP_TTRACE_PC</span><span class="p">)</span>
</pre></div>
</div>
</div>


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