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<instructionsection id="sqxtunt_z_zz" title="SQXTUNT" type="instruction">
  <docvars>
    <docvar key="instr-class" value="sve2" />
    <docvar key="isa" value="A64" />
    <docvar key="mnemonic" value="SQXTUNT" />
  </docvars>
  <heading>SQXTUNT</heading>
  <desc>
    <brief>Signed saturating unsigned extract narrow (top)</brief>
    <description>
      <para>Saturate the signed integer value in each source element to an unsigned integer value that is half the original source element width, and place the results in the odd-numbered half-width destination elements, leaving the even-numbered elements unchanged.</para>
    </description>
    <status>Green</status>
    <predicated>False</predicated>
  </desc>
  <alias_list howmany="0"></alias_list>
  <classes>
    <iclass name="SVE2" oneof="1" id="iclass_sve2" no_encodings="1" isa="A64">
      <docvars>
        <docvar key="instr-class" value="sve2" />
        <docvar key="isa" value="A64" />
        <docvar key="mnemonic" value="SQXTUNT" />
      </docvars>
      <iclassintro count="1"></iclassintro>
      <regdiagram form="32" psname="SQXTUNT-Z.ZZ-_" tworows="1">
        <box hibit="31" width="9" settings="9">
          <c>0</c>
          <c>1</c>
          <c>0</c>
          <c>0</c>
          <c>0</c>
          <c>1</c>
          <c>0</c>
          <c>1</c>
          <c>0</c>
        </box>
        <box hibit="22" name="tszh" usename="1">
          <c></c>
        </box>
        <box hibit="21" settings="1">
          <c>1</c>
        </box>
        <box hibit="20" width="2" name="tszl" usename="1">
          <c colspan="2"></c>
        </box>
        <box hibit="18" width="6" settings="6">
          <c>0</c>
          <c>0</c>
          <c>0</c>
          <c>0</c>
          <c>1</c>
          <c>0</c>
        </box>
        <box hibit="12" name="opc&lt;1&gt;" settings="1">
          <c>1</c>
        </box>
        <box hibit="11" name="opc&lt;0&gt;" settings="1">
          <c>0</c>
        </box>
        <box hibit="10" name="T" usename="1" settings="1">
          <c>1</c>
        </box>
        <box hibit="9" width="5" name="Zn" usename="1">
          <c colspan="5"></c>
        </box>
        <box hibit="4" width="5" name="Zd" usename="1">
          <c colspan="5"></c>
        </box>
      </regdiagram>
      <encoding name="sqxtunt_z_zz_" oneofinclass="1" oneof="1" label="">
        <docvars>
          <docvar key="instr-class" value="sve2" />
          <docvar key="isa" value="A64" />
          <docvar key="mnemonic" value="SQXTUNT" />
        </docvars>
        <asmtemplate><text>SQXTUNT </text><a link="sa_zd" hover="Destination scalable vector register (field &quot;Zd&quot;)">&lt;Zd&gt;</a><text>.</text><a link="sa_t" hover="Size specifier (field &quot;tszh:tszl&quot;) [B,H,S]">&lt;T&gt;</a><text>, </text><a link="sa_zn" hover="First source scalable vector register (field &quot;Zn&quot;)">&lt;Zn&gt;</a><text>.</text><a link="sa_tb" hover="Size specifier (field &quot;tszh:tszl&quot;) [D,H,S]">&lt;Tb&gt;</a></asmtemplate>
      </encoding>
      <ps_section howmany="1">
        <ps name="SQXTUNT-Z.ZZ-_" mylink="SQXTUNT-Z.ZZ-_" enclabels="" sections="1" secttype="noheading">
          <pstext mayhavelinks="1" section="Decode" rep_section="decode">if !<a link="impl-aarch64.HaveSVE2.0" file="shared_pseudocode.xml" hover="function: boolean HaveSVE2()">HaveSVE2</a>() &amp;&amp; !<a link="impl-aarch64.HaveSME.0" file="shared_pseudocode.xml" hover="function: boolean HaveSME()">HaveSME</a>() then UNDEFINED;
bits(3) tsize = tszh:tszl;
integer esize;
case tsize of
    when '001' esize = 16;
    when '010' esize = 32;
    when '100' esize = 64;
    otherwise UNDEFINED;
integer n = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(Zn);
integer d = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(Zd);</pstext>
        </ps>
      </ps_section>
    </iclass>
  </classes>
  <explanations scope="all">
    <explanation enclist="sqxtunt_z_zz_" symboldefcount="1">
      <symbol link="sa_zd">&lt;Zd&gt;</symbol>
      <account encodedin="Zd">
        <intro>
          <para>Is the name of the destination scalable vector register, encoded in the "Zd" field.</para>
        </intro>
      </account>
    </explanation>
    <explanation enclist="sqxtunt_z_zz_" symboldefcount="1">
      <symbol link="sa_t">&lt;T&gt;</symbol>
      <definition encodedin="tszh:tszl">
        <intro>Is the size specifier, </intro>
        <table class="valuetable">
          <tgroup cols="3">
            <thead>
              <row>
                <entry class="bitfield">tszh</entry>
                <entry class="bitfield">tszl</entry>
                <entry class="symbol">&lt;T&gt;</entry>
              </row>
            </thead>
            <tbody>
              <row>
                <entry class="bitfield">0</entry>
                <entry class="bitfield">00</entry>
                <entry class="symbol">RESERVED</entry>
              </row>
              <row>
                <entry class="bitfield">0</entry>
                <entry class="bitfield">01</entry>
                <entry class="symbol">B</entry>
              </row>
              <row>
                <entry class="bitfield">0</entry>
                <entry class="bitfield">10</entry>
                <entry class="symbol">H</entry>
              </row>
              <row>
                <entry class="bitfield">x</entry>
                <entry class="bitfield">11</entry>
                <entry class="symbol">RESERVED</entry>
              </row>
              <row>
                <entry class="bitfield">1</entry>
                <entry class="bitfield">00</entry>
                <entry class="symbol">S</entry>
              </row>
              <row>
                <entry class="bitfield">1</entry>
                <entry class="bitfield">01</entry>
                <entry class="symbol">RESERVED</entry>
              </row>
              <row>
                <entry class="bitfield">1</entry>
                <entry class="bitfield">10</entry>
                <entry class="symbol">RESERVED</entry>
              </row>
            </tbody>
          </tgroup>
        </table>
      </definition>
    </explanation>
    <explanation enclist="sqxtunt_z_zz_" symboldefcount="1">
      <symbol link="sa_zn">&lt;Zn&gt;</symbol>
      <account encodedin="Zn">
        <intro>
          <para>Is the name of the first source scalable vector register, encoded in the "Zn" field.</para>
        </intro>
      </account>
    </explanation>
    <explanation enclist="sqxtunt_z_zz_" symboldefcount="1">
      <symbol link="sa_tb">&lt;Tb&gt;</symbol>
      <definition encodedin="tszh:tszl">
        <intro>Is the size specifier, </intro>
        <table class="valuetable">
          <tgroup cols="3">
            <thead>
              <row>
                <entry class="bitfield">tszh</entry>
                <entry class="bitfield">tszl</entry>
                <entry class="symbol">&lt;Tb&gt;</entry>
              </row>
            </thead>
            <tbody>
              <row>
                <entry class="bitfield">0</entry>
                <entry class="bitfield">00</entry>
                <entry class="symbol">RESERVED</entry>
              </row>
              <row>
                <entry class="bitfield">0</entry>
                <entry class="bitfield">01</entry>
                <entry class="symbol">H</entry>
              </row>
              <row>
                <entry class="bitfield">0</entry>
                <entry class="bitfield">10</entry>
                <entry class="symbol">S</entry>
              </row>
              <row>
                <entry class="bitfield">x</entry>
                <entry class="bitfield">11</entry>
                <entry class="symbol">RESERVED</entry>
              </row>
              <row>
                <entry class="bitfield">1</entry>
                <entry class="bitfield">00</entry>
                <entry class="symbol">D</entry>
              </row>
              <row>
                <entry class="bitfield">1</entry>
                <entry class="bitfield">01</entry>
                <entry class="symbol">RESERVED</entry>
              </row>
              <row>
                <entry class="bitfield">1</entry>
                <entry class="bitfield">10</entry>
                <entry class="symbol">RESERVED</entry>
              </row>
            </tbody>
          </tgroup>
        </table>
      </definition>
    </explanation>
  </explanations>
  <ps_section howmany="1">
    <ps name="SQXTUNT-Z.ZZ-_" mylink="execute" enclabels="" sections="1" secttype="Operation">
      <pstext mayhavelinks="1" section="Execute" rep_section="execute"><a link="impl-aarch64.CheckSVEEnabled.0" file="shared_pseudocode.xml" hover="function: CheckSVEEnabled()">CheckSVEEnabled</a>();
constant integer VL = <a link="impl-aarch64.CurrentVL.read.none" file="shared_pseudocode.xml" hover="accessor: integer CurrentVL">CurrentVL</a>;
constant integer PL = VL DIV 8;
constant integer elements = VL DIV esize;
bits(VL) operand1 = <a link="impl-aarch64.Z.read.2" file="shared_pseudocode.xml" hover="accessor: bits(width) Z[integer n, integer width]">Z</a>[n, VL];
bits(VL) result = <a link="impl-aarch64.Z.read.2" file="shared_pseudocode.xml" hover="accessor: bits(width) Z[integer n, integer width]">Z</a>[d, VL];
constant integer halfesize = esize DIV 2;

for e = 0 to elements-1
    integer element1 = <a link="impl-shared.SInt.1" file="shared_pseudocode.xml" hover="function: integer SInt(bits(N) x)">SInt</a>(<a link="impl-shared.Elem.read.3" file="shared_pseudocode.xml" hover="accessor: bits(size) Elem[bits(N) vector, integer e, integer size]">Elem</a>[operand1, e, esize]);
    bits(halfesize) res = <a link="impl-aarch32.UnsignedSat.2" file="shared_pseudocode.xml" hover="function: bits(N) UnsignedSat(integer i, integer N)">UnsignedSat</a>(element1, halfesize);
    <a link="impl-shared.Elem.write.3" file="shared_pseudocode.xml" hover="accessor: Elem[bits(N) &amp;vector, integer e, integer size] = bits(size) value">Elem</a>[result, 2*e + 1, halfesize] = res;

<a link="impl-aarch64.Z.write.2" file="shared_pseudocode.xml" hover="accessor: Z[integer n, integer width] = bits(width) value">Z</a>[d, VL] = result;</pstext>
    </ps>
  </ps_section>
</instructionsection>
