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<instructionsection id="VQDMULH" title="VQDMULH -- AArch32" type="instruction">
  <docvars>
    <docvar key="instr-class" value="fpsimd" />
    <docvar key="mnemonic" value="VQDMULH" />
  </docvars>
  <heading>VQDMULH</heading>
  <desc>
    <brief>
      <para>Vector Saturating Doubling Multiply Returning High Half</para>
    </brief>
    <authored>
      <para>Vector Saturating Doubling Multiply Returning High Half multiplies corresponding elements in two vectors, doubles the results, and places the most significant half of the final results in the destination vector. The results are truncated, for rounded results see <xref linkend="A32T32-fpsimd.instructions.VQRDMULH">VQRDMULH</xref>.</para>
      <para>The second operand can be a scalar instead of a vector. For more information about scalars see <xref linkend="Cjaibjhd">Advanced SIMD scalars</xref>.</para>
      <para>If any of the results overflow, they are saturated. The cumulative saturation bit, <xref linkend="AArch32.fpscr">FPSCR</xref>.QC, is set if saturation occurs. For details see <xref linkend="BEIHABGJ">Pseudocode details of saturation</xref>.</para>
      <para>Depending on settings in the <xref linkend="AArch32.cpacr">CPACR</xref>, <xref linkend="AArch32.nsacr">NSACR</xref>, and <xref linkend="AArch32.hcptr">HCPTR</xref> registers, and the Security state and PE mode in which the instruction is executed, an attempt to execute the instruction might be <arm-defined-word>undefined</arm-defined-word>, or trapped to Hyp mode. For more information see <xref linkend="CIHIDDFF">Enabling Advanced SIMD and floating-point support</xref>.</para>
    </authored>
    <encodingnotes>
      <para>Related encodings: See <xref linkend="T32.encoding_index.simddp">Advanced SIMD data-processing</xref> for the T32 instruction set, or <xref linkend="A32.encoding_index.advsimddp">Advanced SIMD data-processing</xref> for the A32 instruction set.</para>
    </encodingnotes>
  </desc>
  <alias_list howmany="0"></alias_list>
  <classes>
    <classesintro count="4">
      <txt>It has encodings from the following instruction sets:</txt>
      <txt> A32 (</txt>
      <a href="#iclass_a1">A1</a>
      <txt> and </txt>
      <a href="#iclass_a2">A2</a>
      <txt>)</txt>
      <txt> and </txt>
      <txt> T32 (</txt>
      <a href="#iclass_t1">T1</a>
      <txt> and </txt>
      <a href="#iclass_t2">T2</a>
      <txt>)</txt>
      <txt>.</txt>
    </classesintro>
    <iclass name="A1" oneof="4" id="iclass_a1" no_encodings="2" isa="A32">
      <docvars>
        <docvar key="armarmheading" value="A1" />
        <docvar key="instr-class" value="fpsimd" />
        <docvar key="isa" value="A32" />
        <docvar key="mnemonic" value="VQDMULH" />
      </docvars>
      <iclassintro count="2"></iclassintro>
      <regdiagram form="32" psname="aarch32/instrs/VQDMULH/T1A1_A.txt">
        <box hibit="31" width="7" settings="7">
          <c>1</c>
          <c>1</c>
          <c>1</c>
          <c>1</c>
          <c>0</c>
          <c>0</c>
          <c>1</c>
        </box>
        <box hibit="24" name="U" settings="1">
          <c>0</c>
        </box>
        <box hibit="23" settings="1">
          <c>0</c>
        </box>
        <box hibit="22" name="D" usename="1">
          <c></c>
        </box>
        <box hibit="21" width="2" name="size" usename="1">
          <c colspan="2"></c>
        </box>
        <box hibit="19" width="4" name="Vn" usename="1">
          <c colspan="4"></c>
        </box>
        <box hibit="15" width="4" name="Vd" usename="1">
          <c colspan="4"></c>
        </box>
        <box hibit="11" width="4" name="opc" settings="4">
          <c>1</c>
          <c>0</c>
          <c>1</c>
          <c>1</c>
        </box>
        <box hibit="7" name="N" usename="1">
          <c></c>
        </box>
        <box hibit="6" name="Q" usename="1">
          <c></c>
        </box>
        <box hibit="5" name="M" usename="1">
          <c></c>
        </box>
        <box hibit="4" name="o1" settings="1">
          <c>0</c>
        </box>
        <box hibit="3" width="4" name="Vm" usename="1">
          <c colspan="4"></c>
        </box>
      </regdiagram>
      <encoding name="VQDMULH_A1_D" oneofinclass="2" oneof="8" label="64-bit SIMD vector" bitdiffs="Q == 0">
        <docvars>
          <docvar key="armarmheading" value="A1" />
          <docvar key="instr-class" value="fpsimd" />
          <docvar key="isa" value="A32" />
          <docvar key="mnemonic" value="VQDMULH" />
          <docvar key="simdvectorsize" value="double" />
        </docvars>
        <box hibit="6" width="1" name="Q">
          <c>0</c>
        </box>
        <asmtemplate><text>VQDMULH</text><text>{</text><a link="sa_c_1" hover="See {xref{ARMARM_Babbefhf}{Standard assembler syntax fields}}">&lt;c&gt;</a><text>}</text><text>{</text><a link="sa_q" hover="See {xref{ARMARM_Babbefhf}{Standard assembler syntax fields}}">&lt;q&gt;</a><text>}</text><text>.</text><a link="sa_dt" hover="Data type for elements of operands (field &quot;size&quot;)">&lt;dt&gt;</a><text> </text><text>{</text><a link="sa_dd" hover="64-bit SIMD&amp;FP destination register (field &quot;D:Vd&quot;)">&lt;Dd&gt;</a><text>, </text><text>}</text><a link="sa_dn" hover="First 64-bit SIMD&amp;FP source register (field &quot;N:Vn&quot;)">&lt;Dn&gt;</a><text>, </text><a link="sa_dm" hover="Second 64-bit SIMD&amp;FP source register (field &quot;M:Vm&quot;)">&lt;Dm&gt;</a></asmtemplate>
      </encoding>
      <encoding name="VQDMULH_A1_Q" oneofinclass="2" oneof="8" label="128-bit SIMD vector" bitdiffs="Q == 1">
        <docvars>
          <docvar key="armarmheading" value="A1" />
          <docvar key="instr-class" value="fpsimd" />
          <docvar key="isa" value="A32" />
          <docvar key="mnemonic" value="VQDMULH" />
          <docvar key="simdvectorsize" value="quad" />
        </docvars>
        <box hibit="6" width="1" name="Q">
          <c>1</c>
        </box>
        <asmtemplate><text>VQDMULH</text><text>{</text><a link="sa_c_1" hover="See {xref{ARMARM_Babbefhf}{Standard assembler syntax fields}}">&lt;c&gt;</a><text>}</text><text>{</text><a link="sa_q" hover="See {xref{ARMARM_Babbefhf}{Standard assembler syntax fields}}">&lt;q&gt;</a><text>}</text><text>.</text><a link="sa_dt" hover="Data type for elements of operands (field &quot;size&quot;)">&lt;dt&gt;</a><text> </text><text>{</text><a link="sa_qd" hover="128-bit SIMD&amp;FP destination register (field &quot;D:Vd&quot;)">&lt;Qd&gt;</a><text>, </text><text>}</text><a link="sa_qn" hover="First 128-bit SIMD&amp;FP source register (field &quot;N:Vn&quot;)">&lt;Qn&gt;</a><text>, </text><a link="sa_qm" hover="Second 128-bit SIMD&amp;FP source register (field &quot;M:Vm&quot;)">&lt;Qm&gt;</a></asmtemplate>
      </encoding>
      <ps_section howmany="1">
        <ps name="aarch32/instrs/VQDMULH/T1A1_A.txt" mylink="aarch32.instrs.VQDMULH.T1A1_A.txt" enclabels="" sections="1" secttype="noheading">
          <pstext mayhavelinks="1" section="Decode" rep_section="decode">if Q == '1' &amp;&amp; (Vd&lt;0&gt; == '1' || Vn&lt;0&gt; == '1' || Vm&lt;0&gt; == '1') then UNDEFINED;
if size == '00' || size == '11' then UNDEFINED;
scalar_form = FALSE;  esize = 8 &lt;&lt; <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(size);  elements = 64 DIV esize;
d = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(D:Vd);  n = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(N:Vn);  m = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(M:Vm);  regs = if Q == '0' then 1 else 2;</pstext>
        </ps>
      </ps_section>
    </iclass>
    <iclass name="A2" oneof="4" id="iclass_a2" no_encodings="2" isa="A32">
      <docvars>
        <docvar key="armarmheading" value="A2" />
        <docvar key="instr-class" value="fpsimd" />
        <docvar key="isa" value="A32" />
        <docvar key="mnemonic" value="VQDMULH" />
      </docvars>
      <iclassintro count="2"></iclassintro>
      <regdiagram form="32" psname="aarch32/instrs/VQDMULH/T2A2_A.txt" tworows="1">
        <box hibit="31" width="7" settings="7">
          <c>1</c>
          <c>1</c>
          <c>1</c>
          <c>1</c>
          <c>0</c>
          <c>0</c>
          <c>1</c>
        </box>
        <box hibit="24" name="Q" usename="1">
          <c></c>
        </box>
        <box hibit="23" settings="1">
          <c>1</c>
        </box>
        <box hibit="22" name="D" usename="1">
          <c></c>
        </box>
        <box hibit="21" width="2" name="size" usename="1" settings="2" constraint="!= 11">
          <c colspan="2">!= 11</c>
        </box>
        <box hibit="19" width="4" name="Vn" usename="1">
          <c colspan="4"></c>
        </box>
        <box hibit="15" width="4" name="Vd" usename="1">
          <c colspan="4"></c>
        </box>
        <box hibit="11" width="4" name="opc" settings="4">
          <c>1</c>
          <c>1</c>
          <c>0</c>
          <c>0</c>
        </box>
        <box hibit="7" name="N" usename="1">
          <c></c>
        </box>
        <box hibit="6" settings="1">
          <c>1</c>
        </box>
        <box hibit="5" name="M" usename="1">
          <c></c>
        </box>
        <box hibit="4" settings="1">
          <c>0</c>
        </box>
        <box hibit="3" width="4" name="Vm" usename="1">
          <c colspan="4"></c>
        </box>
      </regdiagram>
      <encoding name="VQDMULH_A2_D" oneofinclass="2" oneof="8" label="64-bit SIMD vector" bitdiffs="Q == 0">
        <docvars>
          <docvar key="armarmheading" value="A2" />
          <docvar key="instr-class" value="fpsimd" />
          <docvar key="isa" value="A32" />
          <docvar key="mnemonic" value="VQDMULH" />
          <docvar key="simdvectorsize" value="double" />
        </docvars>
        <box hibit="24" width="1" name="Q">
          <c>0</c>
        </box>
        <asmtemplate><text>VQDMULH</text><text>{</text><a link="sa_c_1" hover="See {xref{ARMARM_Babbefhf}{Standard assembler syntax fields}}">&lt;c&gt;</a><text>}</text><text>{</text><a link="sa_q" hover="See {xref{ARMARM_Babbefhf}{Standard assembler syntax fields}}">&lt;q&gt;</a><text>}</text><text>.</text><a link="sa_dt" hover="Data type for elements of operands (field &quot;size&quot;)">&lt;dt&gt;</a><text> </text><text>{</text><a link="sa_dd" hover="64-bit SIMD&amp;FP destination register (field &quot;D:Vd&quot;)">&lt;Dd&gt;</a><text>,</text><text>}</text><text> </text><a link="sa_dn" hover="First 64-bit SIMD&amp;FP source register (field &quot;N:Vn&quot;)">&lt;Dn&gt;</a><text>, </text><a link="sa_dm_x" hover="Second 64-bit SIMD&amp;FP source register holding scalar (field &quot;Vm&lt;2:0&gt;&quot;)">&lt;Dm[x]&gt;</a></asmtemplate>
      </encoding>
      <encoding name="VQDMULH_A2_Q" oneofinclass="2" oneof="8" label="128-bit SIMD vector" bitdiffs="Q == 1">
        <docvars>
          <docvar key="armarmheading" value="A2" />
          <docvar key="instr-class" value="fpsimd" />
          <docvar key="isa" value="A32" />
          <docvar key="mnemonic" value="VQDMULH" />
          <docvar key="simdvectorsize" value="quad" />
        </docvars>
        <box hibit="24" width="1" name="Q">
          <c>1</c>
        </box>
        <asmtemplate><text>VQDMULH</text><text>{</text><a link="sa_c_1" hover="See {xref{ARMARM_Babbefhf}{Standard assembler syntax fields}}">&lt;c&gt;</a><text>}</text><text>{</text><a link="sa_q" hover="See {xref{ARMARM_Babbefhf}{Standard assembler syntax fields}}">&lt;q&gt;</a><text>}</text><text>.</text><a link="sa_dt" hover="Data type for elements of operands (field &quot;size&quot;)">&lt;dt&gt;</a><text> </text><text>{</text><a link="sa_qd" hover="128-bit SIMD&amp;FP destination register (field &quot;D:Vd&quot;)">&lt;Qd&gt;</a><text>,</text><text>}</text><text> </text><a link="sa_qn" hover="First 128-bit SIMD&amp;FP source register (field &quot;N:Vn&quot;)">&lt;Qn&gt;</a><text>, </text><a link="sa_dm_x" hover="Second 64-bit SIMD&amp;FP source register holding scalar (field &quot;Vm&lt;2:0&gt;&quot;)">&lt;Dm[x]&gt;</a></asmtemplate>
      </encoding>
      <ps_section howmany="1">
        <ps name="aarch32/instrs/VQDMULH/T2A2_A.txt" mylink="aarch32.instrs.VQDMULH.T2A2_A.txt" enclabels="" sections="1" secttype="noheading">
          <pstext mayhavelinks="1" section="Decode" rep_section="decode">if size == '11' then SEE "Related encodings";
if size == '00' then UNDEFINED;
if Q == '1' &amp;&amp; (Vd&lt;0&gt; == '1' || Vn&lt;0&gt; == '1') then UNDEFINED;
scalar_form = TRUE;  d = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(D:Vd);  n = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(N:Vn);  regs = if Q == '0' then 1 else 2;
integer esize;
integer elements;
integer m;
integer index;
if size == '01' then esize = 16;  elements = 4;  m = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(Vm&lt;2:0&gt;);  index = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(M:Vm&lt;3&gt;);
if size == '10' then esize = 32;  elements = 2;  m = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(Vm);  index = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(M);</pstext>
        </ps>
      </ps_section>
    </iclass>
    <iclass name="T1" oneof="4" id="iclass_t1" no_encodings="2" isa="T32">
      <docvars>
        <docvar key="armarmheading" value="T1" />
        <docvar key="instr-class" value="fpsimd" />
        <docvar key="isa" value="T32" />
        <docvar key="mnemonic" value="VQDMULH" />
      </docvars>
      <iclassintro count="2"></iclassintro>
      <regdiagram form="16x2" psname="aarch32/instrs/VQDMULH/T1A1_A.txt">
        <box hibit="31" width="3" settings="3">
          <c>1</c>
          <c>1</c>
          <c>1</c>
        </box>
        <box hibit="28" name="U" settings="1">
          <c>0</c>
        </box>
        <box hibit="27" width="5" settings="5">
          <c>1</c>
          <c>1</c>
          <c>1</c>
          <c>1</c>
          <c>0</c>
        </box>
        <box hibit="22" name="D" usename="1">
          <c></c>
        </box>
        <box hibit="21" width="2" name="size" usename="1">
          <c colspan="2"></c>
        </box>
        <box hibit="19" width="4" name="Vn" usename="1">
          <c colspan="4"></c>
        </box>
        <box hibit="15" width="4" name="Vd" usename="1">
          <c colspan="4"></c>
        </box>
        <box hibit="11" width="4" name="opc" settings="4">
          <c>1</c>
          <c>0</c>
          <c>1</c>
          <c>1</c>
        </box>
        <box hibit="7" name="N" usename="1">
          <c></c>
        </box>
        <box hibit="6" name="Q" usename="1">
          <c></c>
        </box>
        <box hibit="5" name="M" usename="1">
          <c></c>
        </box>
        <box hibit="4" name="o1" settings="1">
          <c>0</c>
        </box>
        <box hibit="3" width="4" name="Vm" usename="1">
          <c colspan="4"></c>
        </box>
      </regdiagram>
      <encoding name="VQDMULH_T1_D" oneofinclass="2" oneof="8" label="64-bit SIMD vector" bitdiffs="Q == 0">
        <docvars>
          <docvar key="armarmheading" value="T1" />
          <docvar key="instr-class" value="fpsimd" />
          <docvar key="isa" value="T32" />
          <docvar key="mnemonic" value="VQDMULH" />
          <docvar key="simdvectorsize" value="double" />
        </docvars>
        <box hibit="6" width="1" name="Q">
          <c>0</c>
        </box>
        <asmtemplate><text>VQDMULH</text><text>{</text><a link="sa_c" hover="See {xref{ARMARM_Babbefhf}{Standard assembler syntax fields}}">&lt;c&gt;</a><text>}</text><text>{</text><a link="sa_q" hover="See {xref{ARMARM_Babbefhf}{Standard assembler syntax fields}}">&lt;q&gt;</a><text>}</text><text>.</text><a link="sa_dt" hover="Data type for elements of operands (field &quot;size&quot;)">&lt;dt&gt;</a><text> </text><text>{</text><a link="sa_dd" hover="64-bit SIMD&amp;FP destination register (field &quot;D:Vd&quot;)">&lt;Dd&gt;</a><text>, </text><text>}</text><a link="sa_dn" hover="First 64-bit SIMD&amp;FP source register (field &quot;N:Vn&quot;)">&lt;Dn&gt;</a><text>, </text><a link="sa_dm" hover="Second 64-bit SIMD&amp;FP source register (field &quot;M:Vm&quot;)">&lt;Dm&gt;</a></asmtemplate>
      </encoding>
      <encoding name="VQDMULH_T1_Q" oneofinclass="2" oneof="8" label="128-bit SIMD vector" bitdiffs="Q == 1">
        <docvars>
          <docvar key="armarmheading" value="T1" />
          <docvar key="instr-class" value="fpsimd" />
          <docvar key="isa" value="T32" />
          <docvar key="mnemonic" value="VQDMULH" />
          <docvar key="simdvectorsize" value="quad" />
        </docvars>
        <box hibit="6" width="1" name="Q">
          <c>1</c>
        </box>
        <asmtemplate><text>VQDMULH</text><text>{</text><a link="sa_c" hover="See {xref{ARMARM_Babbefhf}{Standard assembler syntax fields}}">&lt;c&gt;</a><text>}</text><text>{</text><a link="sa_q" hover="See {xref{ARMARM_Babbefhf}{Standard assembler syntax fields}}">&lt;q&gt;</a><text>}</text><text>.</text><a link="sa_dt" hover="Data type for elements of operands (field &quot;size&quot;)">&lt;dt&gt;</a><text> </text><text>{</text><a link="sa_qd" hover="128-bit SIMD&amp;FP destination register (field &quot;D:Vd&quot;)">&lt;Qd&gt;</a><text>, </text><text>}</text><a link="sa_qn" hover="First 128-bit SIMD&amp;FP source register (field &quot;N:Vn&quot;)">&lt;Qn&gt;</a><text>, </text><a link="sa_qm" hover="Second 128-bit SIMD&amp;FP source register (field &quot;M:Vm&quot;)">&lt;Qm&gt;</a></asmtemplate>
      </encoding>
      <ps_section howmany="1">
        <ps name="aarch32/instrs/VQDMULH/T1A1_A.txt" mylink="aarch32.instrs.VQDMULH.T1A1_A.txt" enclabels="" sections="1" secttype="noheading">
          <pstext mayhavelinks="1" section="Decode" rep_section="decode">if Q == '1' &amp;&amp; (Vd&lt;0&gt; == '1' || Vn&lt;0&gt; == '1' || Vm&lt;0&gt; == '1') then UNDEFINED;
if size == '00' || size == '11' then UNDEFINED;
scalar_form = FALSE;  esize = 8 &lt;&lt; <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(size);  elements = 64 DIV esize;
d = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(D:Vd);  n = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(N:Vn);  m = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(M:Vm);  regs = if Q == '0' then 1 else 2;</pstext>
        </ps>
      </ps_section>
    </iclass>
    <iclass name="T2" oneof="4" id="iclass_t2" no_encodings="2" isa="T32">
      <docvars>
        <docvar key="armarmheading" value="T2" />
        <docvar key="instr-class" value="fpsimd" />
        <docvar key="isa" value="T32" />
        <docvar key="mnemonic" value="VQDMULH" />
      </docvars>
      <iclassintro count="2"></iclassintro>
      <regdiagram form="16x2" psname="aarch32/instrs/VQDMULH/T2A2_A.txt" tworows="1">
        <box hibit="31" width="3" settings="3">
          <c>1</c>
          <c>1</c>
          <c>1</c>
        </box>
        <box hibit="28" name="Q" usename="1">
          <c></c>
        </box>
        <box hibit="27" width="5" settings="5">
          <c>1</c>
          <c>1</c>
          <c>1</c>
          <c>1</c>
          <c>1</c>
        </box>
        <box hibit="22" name="D" usename="1">
          <c></c>
        </box>
        <box hibit="21" width="2" name="size" usename="1" settings="2" constraint="!= 11">
          <c colspan="2">!= 11</c>
        </box>
        <box hibit="19" width="4" name="Vn" usename="1">
          <c colspan="4"></c>
        </box>
        <box hibit="15" width="4" name="Vd" usename="1">
          <c colspan="4"></c>
        </box>
        <box hibit="11" width="4" name="opc" settings="4">
          <c>1</c>
          <c>1</c>
          <c>0</c>
          <c>0</c>
        </box>
        <box hibit="7" name="N" usename="1">
          <c></c>
        </box>
        <box hibit="6" settings="1">
          <c>1</c>
        </box>
        <box hibit="5" name="M" usename="1">
          <c></c>
        </box>
        <box hibit="4" settings="1">
          <c>0</c>
        </box>
        <box hibit="3" width="4" name="Vm" usename="1">
          <c colspan="4"></c>
        </box>
      </regdiagram>
      <encoding name="VQDMULH_T2_D" oneofinclass="2" oneof="8" label="64-bit SIMD vector" bitdiffs="Q == 0">
        <docvars>
          <docvar key="armarmheading" value="T2" />
          <docvar key="instr-class" value="fpsimd" />
          <docvar key="isa" value="T32" />
          <docvar key="mnemonic" value="VQDMULH" />
          <docvar key="simdvectorsize" value="double" />
        </docvars>
        <box hibit="28" width="1" name="Q">
          <c>0</c>
        </box>
        <asmtemplate><text>VQDMULH</text><text>{</text><a link="sa_c" hover="See {xref{ARMARM_Babbefhf}{Standard assembler syntax fields}}">&lt;c&gt;</a><text>}</text><text>{</text><a link="sa_q" hover="See {xref{ARMARM_Babbefhf}{Standard assembler syntax fields}}">&lt;q&gt;</a><text>}</text><text>.</text><a link="sa_dt" hover="Data type for elements of operands (field &quot;size&quot;)">&lt;dt&gt;</a><text> </text><text>{</text><a link="sa_dd" hover="64-bit SIMD&amp;FP destination register (field &quot;D:Vd&quot;)">&lt;Dd&gt;</a><text>,</text><text>}</text><text> </text><a link="sa_dn" hover="First 64-bit SIMD&amp;FP source register (field &quot;N:Vn&quot;)">&lt;Dn&gt;</a><text>, </text><a link="sa_dm_x" hover="Second 64-bit SIMD&amp;FP source register holding scalar (field &quot;Vm&lt;2:0&gt;&quot;)">&lt;Dm[x]&gt;</a></asmtemplate>
      </encoding>
      <encoding name="VQDMULH_T2_Q" oneofinclass="2" oneof="8" label="128-bit SIMD vector" bitdiffs="Q == 1">
        <docvars>
          <docvar key="armarmheading" value="T2" />
          <docvar key="instr-class" value="fpsimd" />
          <docvar key="isa" value="T32" />
          <docvar key="mnemonic" value="VQDMULH" />
          <docvar key="simdvectorsize" value="quad" />
        </docvars>
        <box hibit="28" width="1" name="Q">
          <c>1</c>
        </box>
        <asmtemplate><text>VQDMULH</text><text>{</text><a link="sa_c" hover="See {xref{ARMARM_Babbefhf}{Standard assembler syntax fields}}">&lt;c&gt;</a><text>}</text><text>{</text><a link="sa_q" hover="See {xref{ARMARM_Babbefhf}{Standard assembler syntax fields}}">&lt;q&gt;</a><text>}</text><text>.</text><a link="sa_dt" hover="Data type for elements of operands (field &quot;size&quot;)">&lt;dt&gt;</a><text> </text><text>{</text><a link="sa_qd" hover="128-bit SIMD&amp;FP destination register (field &quot;D:Vd&quot;)">&lt;Qd&gt;</a><text>,</text><text>}</text><text> </text><a link="sa_qn" hover="First 128-bit SIMD&amp;FP source register (field &quot;N:Vn&quot;)">&lt;Qn&gt;</a><text>, </text><a link="sa_dm_x" hover="Second 64-bit SIMD&amp;FP source register holding scalar (field &quot;Vm&lt;2:0&gt;&quot;)">&lt;Dm[x]&gt;</a></asmtemplate>
      </encoding>
      <ps_section howmany="1">
        <ps name="aarch32/instrs/VQDMULH/T2A2_A.txt" mylink="aarch32.instrs.VQDMULH.T2A2_A.txt" enclabels="" sections="1" secttype="noheading">
          <pstext mayhavelinks="1" section="Decode" rep_section="decode">if size == '11' then SEE "Related encodings";
if size == '00' then UNDEFINED;
if Q == '1' &amp;&amp; (Vd&lt;0&gt; == '1' || Vn&lt;0&gt; == '1') then UNDEFINED;
scalar_form = TRUE;  d = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(D:Vd);  n = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(N:Vn);  regs = if Q == '0' then 1 else 2;
integer esize;
integer elements;
integer m;
integer index;
if size == '01' then esize = 16;  elements = 4;  m = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(Vm&lt;2:0&gt;);  index = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(M:Vm&lt;3&gt;);
if size == '10' then esize = 32;  elements = 2;  m = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(Vm);  index = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(M);</pstext>
        </ps>
      </ps_section>
    </iclass>
  </classes>
  <explanations scope="all">
    <explanation enclist="VQDMULH_A1_Q, VQDMULH_A2_Q" symboldefcount="1">
      <symbol link="sa_c_1">&lt;c&gt;</symbol>
      <account encodedin="">
        <docvars>
          <docvar key="isa" value="A32" />
        </docvars>
        <intro>
          <para>For encoding A1 and A2: see <xref linkend="Babbefhf">Standard assembler syntax fields</xref>. This encoding must be unconditional.</para>
        </intro>
      </account>
    </explanation>
    <explanation enclist="VQDMULH_T1_Q, VQDMULH_T2_Q" symboldefcount="2">
      <symbol link="sa_c">&lt;c&gt;</symbol>
      <account encodedin="">
        <docvars>
          <docvar key="isa" value="T32" />
        </docvars>
        <intro>
          <para>For encoding T1 and T2: see <xref linkend="Babbefhf">Standard assembler syntax fields</xref>.</para>
        </intro>
      </account>
    </explanation>
    <explanation enclist="VQDMULH_A1_Q, VQDMULH_A2_Q, VQDMULH_T1_Q, VQDMULH_T2_Q" symboldefcount="1">
      <symbol link="sa_q">&lt;q&gt;</symbol>
      <account encodedin="">
        <intro>
          <para>See <xref linkend="Babbefhf">Standard assembler syntax fields</xref>.</para>
        </intro>
      </account>
    </explanation>
    <explanation enclist="VQDMULH_A1_Q, VQDMULH_A2_Q, VQDMULH_T1_Q, VQDMULH_T2_Q" symboldefcount="1">
      <symbol link="sa_dt">&lt;dt&gt;</symbol>
      <definition encodedin="size">
        <intro>Is the data type for the elements of the operands, </intro>
        <table class="valuetable">
          <tgroup cols="2">
            <thead>
              <row>
                <entry class="bitfield">size</entry>
                <entry class="symbol">&lt;dt&gt;</entry>
              </row>
            </thead>
            <tbody>
              <row>
                <entry class="bitfield">01</entry>
                <entry class="symbol">S16</entry>
              </row>
              <row>
                <entry class="bitfield">10</entry>
                <entry class="symbol">S32</entry>
              </row>
            </tbody>
          </tgroup>
        </table>
      </definition>
    </explanation>
    <explanation enclist="VQDMULH_A1_Q, VQDMULH_A2_Q, VQDMULH_T1_Q, VQDMULH_T2_Q" symboldefcount="1">
      <symbol link="sa_qd">&lt;Qd&gt;</symbol>
      <account encodedin="D:Vd">
        <intro>
          <para>Is the 128-bit name of the SIMD&amp;FP destination register, encoded in the "D:Vd" field as &lt;Qd&gt;*2.</para>
        </intro>
      </account>
    </explanation>
    <explanation enclist="VQDMULH_A1_Q, VQDMULH_A2_Q, VQDMULH_T1_Q, VQDMULH_T2_Q" symboldefcount="1">
      <symbol link="sa_qn">&lt;Qn&gt;</symbol>
      <account encodedin="N:Vn">
        <intro>
          <para>Is the 128-bit name of the first SIMD&amp;FP source register, encoded in the "N:Vn" field as &lt;Qn&gt;*2.</para>
        </intro>
      </account>
    </explanation>
    <explanation enclist="VQDMULH_A1_Q, VQDMULH_T1_Q" symboldefcount="1">
      <symbol link="sa_qm">&lt;Qm&gt;</symbol>
      <account encodedin="M:Vm">
        <intro>
          <para>Is the 128-bit name of the second SIMD&amp;FP source register, encoded in the "M:Vm" field as &lt;Qm&gt;*2.</para>
        </intro>
      </account>
    </explanation>
    <explanation enclist="VQDMULH_A1_D, VQDMULH_A2_D, VQDMULH_T1_D, VQDMULH_T2_D" symboldefcount="1">
      <symbol link="sa_dd">&lt;Dd&gt;</symbol>
      <account encodedin="D:Vd">
        <intro>
          <para>Is the 64-bit name of the SIMD&amp;FP destination register, encoded in the "D:Vd" field.</para>
        </intro>
      </account>
    </explanation>
    <explanation enclist="VQDMULH_A1_D, VQDMULH_A2_D, VQDMULH_T1_D, VQDMULH_T2_D" symboldefcount="1">
      <symbol link="sa_dn">&lt;Dn&gt;</symbol>
      <account encodedin="N:Vn">
        <intro>
          <para>Is the 64-bit name of the first SIMD&amp;FP source register, encoded in the "N:Vn" field.</para>
        </intro>
      </account>
    </explanation>
    <explanation enclist="VQDMULH_A2_Q, VQDMULH_T2_Q" symboldefcount="1">
      <symbol link="sa_dm_x">&lt;Dm[x]&gt;</symbol>
      <account encodedin="">
        <intro>
          <para>Is the 64-bit name of the second SIMD&amp;FP source register holding the scalar. If <syntax>&lt;dt&gt;</syntax> is <value>S16</value>, <syntax>Dm</syntax> is restricted to D0-D7. <syntax>Dm</syntax> is encoded in "Vm&lt;2:0&gt;", and <syntax>x</syntax> is encoded in "M:Vm&lt;3&gt;". If <syntax>&lt;dt&gt;</syntax> is <value>S32</value>, <syntax>Dm</syntax> is restricted to D0-D15. <syntax>Dm</syntax> is encoded in "Vm", and <syntax>x</syntax> is encoded in "M".</para>
        </intro>
      </account>
    </explanation>
    <explanation enclist="VQDMULH_A1_D, VQDMULH_T1_D" symboldefcount="1">
      <symbol link="sa_dm">&lt;Dm&gt;</symbol>
      <account encodedin="M:Vm">
        <intro>
          <para>Is the 64-bit name of the second SIMD&amp;FP source register, encoded in the "M:Vm" field.</para>
        </intro>
      </account>
    </explanation>
  </explanations>
  <ps_section howmany="1">
    <ps name="aarch32/instrs/VQDMULH/Op_A.txt" mylink="execute" enclabels="" sections="1" secttype="Operation">
      <pstext mayhavelinks="1" section="Execute" rep_section="execute">if <a link="impl-aarch32.ConditionPassed.0" file="shared_pseudocode.xml" hover="function: boolean ConditionPassed()">ConditionPassed</a>() then
    EncodingSpecificOperations();  <a link="impl-aarch32.CheckAdvSIMDEnabled.0" file="shared_pseudocode.xml" hover="function: CheckAdvSIMDEnabled()">CheckAdvSIMDEnabled</a>();
    integer op2;
    if scalar_form then op2 = <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>[<a link="impl-aarch32.D.read.1" file="shared_pseudocode.xml" hover="accessor: bits(64) D[integer n]">D</a>[m],index,esize]);
    for r = 0 to regs-1
        for e = 0 to elements-1
            if !scalar_form then op2 = <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>[<a link="impl-aarch32.D.read.1" file="shared_pseudocode.xml" hover="accessor: bits(64) D[integer n]">D</a>[m+r],e,esize]);
            op1 = <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>[<a link="impl-aarch32.D.read.1" file="shared_pseudocode.xml" hover="accessor: bits(64) D[integer n]">D</a>[n+r],e,esize]);
            // The following only saturates if both op1 and op2 equal -(2^(esize-1))
            (result, sat) = <a link="impl-shared.SignedSatQ.2" file="shared_pseudocode.xml" hover="function: (bits(N), boolean) SignedSatQ(integer i, integer N)">SignedSatQ</a>((2*op1*op2) &gt;&gt; esize, esize);
            <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>[<a link="impl-aarch32.D.write.1" file="shared_pseudocode.xml" hover="accessor: D[integer n] = bits(64) value">D</a>[d+r],e,esize] = result;
            if sat then FPSCR.QC = '1';</pstext>
    </ps>
  </ps_section>
</instructionsection>
