archived-ballistic/spec/arm64_xml/at_sys.xml

<?xml version="1.0" encoding="utf-8"?>
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<instructionsection id="AT_SYS" title="AT -- A64" type="alias">
  <docvars>
    <docvar key="alias_mnemonic" value="AT" />
    <docvar key="instr-class" value="system" />
    <docvar key="isa" value="A64" />
    <docvar key="mnemonic" value="SYS" />
  </docvars>
  <heading>AT</heading>
  <desc>
    <brief>
      <para>Address Translate</para>
    </brief>
    <authored>
      <para>Address Translate. For more information, see <xref linkend="BABEJJJE">op0==0b01, cache maintenance, TLB maintenance, and address translation instructions</xref>.</para>
    </authored>
  </desc>
  <aliasto refiform="sys.xml" iformid="SYS">SYS</aliasto>
  <classes>
    <iclass name="System" oneof="1" id="iclass_system" no_encodings="1" isa="A64">
      <docvars>
        <docvar key="instr-class" value="system" />
        <docvar key="isa" value="A64" />
        <docvar key="mnemonic" value="SYS" />
      </docvars>
      <iclassintro count="1"></iclassintro>
      <regdiagram form="32" psname="aarch64/instrs/system/sysops" tworows="1">
        <box hibit="31" width="10" settings="10">
          <c>1</c>
          <c>1</c>
          <c>0</c>
          <c>1</c>
          <c>0</c>
          <c>1</c>
          <c>0</c>
          <c>1</c>
          <c>0</c>
          <c>0</c>
        </box>
        <box hibit="21" name="L" usename="1" settings="1" psbits="x">
          <c>0</c>
        </box>
        <box hibit="20" width="2" name="op0" settings="2">
          <c>0</c>
          <c>1</c>
        </box>
        <box hibit="18" width="3" name="op1" usename="1">
          <c colspan="3"></c>
        </box>
        <box hibit="15" width="4" name="CRn" usename="1" settings="4" psbits="xxxx">
          <c>0</c>
          <c>1</c>
          <c>1</c>
          <c>1</c>
        </box>
        <box hibit="11" width="4" name="CRm" usename="1" settings="3" psbits="xxxx">
          <c>1</c>
          <c>0</c>
          <c>0</c>
          <c>x</c>
        </box>
        <box hibit="7" width="3" name="op2" usename="1">
          <c colspan="3"></c>
        </box>
        <box hibit="4" width="5" name="Rt" usename="1">
          <c colspan="5"></c>
        </box>
      </regdiagram>
      <encoding name="AT_SYS_CR_systeminstrs" oneofinclass="1" oneof="1" label="">
        <docvars>
          <docvar key="alias_mnemonic" value="AT" />
          <docvar key="instr-class" value="system" />
          <docvar key="isa" value="A64" />
          <docvar key="mnemonic" value="SYS" />
        </docvars>
        <asmtemplate><text>AT  </text><a link="sa_at_op" hover="AT instruction name, as listed for AT system instruction group (field &quot;op1:CRm&lt;0&gt;:op2&quot;) [S1E0R,S1E0W,S1E1R,S1E1RP (FEAT_PAN2),S1E1W,S1E1WP (FEAT_PAN2),S1E2R,S1E2W,S1E3R,S1E3W,S12E0R,S12E0W,S12E1R,S12E1W]">&lt;at_op&gt;</a><text>, </text><a link="sa_xt_1" hover="64-bit general-purpose source register (field &quot;Rt&quot;)">&lt;Xt&gt;</a></asmtemplate>
        <equivalent_to>
          <asmtemplate><a href="sys.xml#SYS_CR_systeminstrs">SYS</a><text> #</text><a link="sa_op1" hover="3-bit unsigned immediate [0-7] (field &quot;op1&quot;)">&lt;op1&gt;</a><text>, C7, </text><a link="sa_cm" hover="Name 'Cm', with 'm' [0-15] (field &quot;CRm&quot;)">&lt;Cm&gt;</a><text>, #</text><a link="sa_op2" hover="3-bit unsigned immediate [0-7] (field &quot;op2&quot;)">&lt;op2&gt;</a><text>, </text><a link="sa_xt_1" hover="64-bit general-purpose source register (field &quot;Rt&quot;)">&lt;Xt&gt;</a></asmtemplate>
          <aliascond><a link="impl-aarch64.SysOp.4" file="shared_pseudocode.xml" hover="function: SystemOp SysOp(bits(3) op1, bits(4) CRn, bits(4) CRm, bits(3) op2)">SysOp</a>(op1,'0111',CRm,op2) == <a link="Sys_AT" file="shared_pseudocode.xml" hover="enumeration SystemOp {Sys_AT, Sys_BRB, Sys_DC, Sys_IC, Sys_TLBI, Sys_SYS}">Sys_AT</a></aliascond>
        </equivalent_to>
      </encoding>
    </iclass>
  </classes>
  <explanations scope="all">
    <explanation enclist="AT_SYS_CR_systeminstrs" symboldefcount="1">
      <symbol link="sa_at_op">&lt;at_op&gt;</symbol>
      <definition encodedin="op1:CRm&lt;0&gt;:op2">
        <intro>Is an AT instruction name, as listed for the AT system instruction group, </intro>
        <table class="valuetable">
          <tgroup cols="4">
            <thead>
              <row>
                <entry class="bitfield">op1</entry>
                <entry class="bitfield">CRm&lt;0&gt;</entry>
                <entry class="bitfield">op2</entry>
                <entry class="symbol">&lt;at_op&gt;</entry>
                <entry class="symbol">Architectural Feature</entry>
              </row>
            </thead>
            <tbody>
              <row>
                <entry class="bitfield">000</entry>
                <entry class="bitfield">0</entry>
                <entry class="bitfield">000</entry>
                <entry class="symbol">S1E1R</entry>
                <entry class="feature" />
              </row>
              <row>
                <entry class="bitfield">000</entry>
                <entry class="bitfield">0</entry>
                <entry class="bitfield">001</entry>
                <entry class="symbol">S1E1W</entry>
                <entry class="feature" />
              </row>
              <row>
                <entry class="bitfield">000</entry>
                <entry class="bitfield">0</entry>
                <entry class="bitfield">010</entry>
                <entry class="symbol">S1E0R</entry>
                <entry class="feature" />
              </row>
              <row>
                <entry class="bitfield">000</entry>
                <entry class="bitfield">0</entry>
                <entry class="bitfield">011</entry>
                <entry class="symbol">S1E0W</entry>
                <entry class="feature" />
              </row>
              <row>
                <entry class="bitfield">000</entry>
                <entry class="bitfield">1</entry>
                <entry class="bitfield">000</entry>
                <entry class="symbol">S1E1RP</entry>
                <entry class="feature">
                  <arch_variants>
                    <arch_variant feature="FEAT_PAN2" />
                  </arch_variants>
                </entry>
              </row>
              <row>
                <entry class="bitfield">000</entry>
                <entry class="bitfield">1</entry>
                <entry class="bitfield">001</entry>
                <entry class="symbol">S1E1WP</entry>
                <entry class="feature">
                  <arch_variants>
                    <arch_variant feature="FEAT_PAN2" />
                  </arch_variants>
                </entry>
              </row>
              <row>
                <entry class="bitfield">100</entry>
                <entry class="bitfield">0</entry>
                <entry class="bitfield">000</entry>
                <entry class="symbol">S1E2R</entry>
                <entry class="feature" />
              </row>
              <row>
                <entry class="bitfield">100</entry>
                <entry class="bitfield">0</entry>
                <entry class="bitfield">001</entry>
                <entry class="symbol">S1E2W</entry>
                <entry class="feature" />
              </row>
              <row>
                <entry class="bitfield">100</entry>
                <entry class="bitfield">0</entry>
                <entry class="bitfield">100</entry>
                <entry class="symbol">S12E1R</entry>
                <entry class="feature" />
              </row>
              <row>
                <entry class="bitfield">100</entry>
                <entry class="bitfield">0</entry>
                <entry class="bitfield">101</entry>
                <entry class="symbol">S12E1W</entry>
                <entry class="feature" />
              </row>
              <row>
                <entry class="bitfield">100</entry>
                <entry class="bitfield">0</entry>
                <entry class="bitfield">110</entry>
                <entry class="symbol">S12E0R</entry>
                <entry class="feature" />
              </row>
              <row>
                <entry class="bitfield">100</entry>
                <entry class="bitfield">0</entry>
                <entry class="bitfield">111</entry>
                <entry class="symbol">S12E0W</entry>
                <entry class="feature" />
              </row>
              <row>
                <entry class="bitfield">110</entry>
                <entry class="bitfield">0</entry>
                <entry class="bitfield">000</entry>
                <entry class="symbol">S1E3R</entry>
                <entry class="feature" />
              </row>
              <row>
                <entry class="bitfield">110</entry>
                <entry class="bitfield">0</entry>
                <entry class="bitfield">001</entry>
                <entry class="symbol">S1E3W</entry>
                <entry class="feature" />
              </row>
            </tbody>
          </tgroup>
        </table>
      </definition>
    </explanation>
    <explanation enclist="AT_SYS_CR_systeminstrs" symboldefcount="1">
      <symbol link="sa_op1">&lt;op1&gt;</symbol>
      <account encodedin="op1">
        <intro>
          <para>Is a 3-bit unsigned immediate, in the range 0 to 7, encoded in the "op1" field.</para>
        </intro>
      </account>
    </explanation>
    <explanation enclist="AT_SYS_CR_systeminstrs" symboldefcount="1">
      <symbol link="sa_cm">&lt;Cm&gt;</symbol>
      <account encodedin="CRm">
        <intro>
          <para>Is a name 'Cm', with 'm' in the range 0 to 15, encoded in the "CRm" field.</para>
        </intro>
      </account>
    </explanation>
    <explanation enclist="AT_SYS_CR_systeminstrs" symboldefcount="1">
      <symbol link="sa_op2">&lt;op2&gt;</symbol>
      <account encodedin="op2">
        <intro>
          <para>Is a 3-bit unsigned immediate, in the range 0 to 7, encoded in the "op2" field.</para>
        </intro>
      </account>
    </explanation>
    <explanation enclist="AT_SYS_CR_systeminstrs" symboldefcount="1">
      <symbol link="sa_xt_1">&lt;Xt&gt;</symbol>
      <account encodedin="Rt">
        <intro>
          <para>Is the 64-bit name of the general-purpose source register, encoded in the "Rt" field.</para>
        </intro>
      </account>
    </explanation>
  </explanations>
</instructionsection>