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<instructionsection id="VACGE" title="VACGE -- AArch32" type="instruction">
  <docvars>
    <docvar key="instr-class" value="fpsimd" />
    <docvar key="mnemonic" value="VACGE" />
  </docvars>
  <heading>VACGE</heading>
  <desc>
    <brief>
      <para>Vector Absolute Compare Greater Than or Equal</para>
    </brief>
    <authored>
      <para>Vector Absolute Compare Greater Than or Equal takes the absolute value of each element in a vector, and compares it with the absolute value of the corresponding element of a second vector. If the first is greater than or equal to the second, the corresponding element in the destination vector is set to all ones. Otherwise, it is set to all zeros.</para>
      <para>The operands and result can be quadword or doubleword vectors.  They must all be the same size.</para>
      <para>The operand vector elements are floating-point numbers. The result vector elements are the same size as the operand vector elements.</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>
  </desc>
  <alias_list howmany="1">
    <alias_list_intro>This instruction is used by the alias </alias_list_intro>
    <aliasref aliaspageid="VACLE_VACGE" aliasfile="vacle_vacge.xml" hover="Vector Absolute Compare Less Than or Equal" punct=".">
      <text>VACLE</text>
      <aliaspref>Never</aliaspref>
    </aliasref>
    <alias_list_outro>
      <text>  See </text>
      <aliastablelink />
      <text> below for details of when the alias is preferred.</text>
    </alias_list_outro>
  </alias_list>
  <classes>
    <classesintro count="2">
      <txt>It has encodings from the following instruction sets:</txt>
      <txt> A32 (</txt>
      <a href="#iclass_a1">A1</a>
      <txt>)</txt>
      <txt> and </txt>
      <txt> T32 (</txt>
      <a href="#iclass_t1">T1</a>
      <txt>)</txt>
      <txt>.</txt>
    </classesintro>
    <iclass name="A1" oneof="2" 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="VACGE" />
      </docvars>
      <iclassintro count="2"></iclassintro>
      <regdiagram form="32" psname="aarch32/instrs/VACGE/A1_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="U" settings="1">
          <c>1</c>
        </box>
        <box hibit="23" settings="1">
          <c>0</c>
        </box>
        <box hibit="22" name="D" usename="1">
          <c></c>
        </box>
        <box hibit="21" name="op" usename="1" settings="1">
          <c>0</c>
        </box>
        <box hibit="20" name="sz" usename="1">
          <c></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>1</c>
          <c>0</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>1</c>
        </box>
        <box hibit="3" width="4" name="Vm" usename="1">
          <c colspan="4"></c>
        </box>
      </regdiagram>
      <encoding name="VACGE_A1_D" oneofinclass="2" oneof="4" 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="VACGE" />
          <docvar key="simdvectorsize" value="double" />
        </docvars>
        <box hibit="6" width="1" name="Q">
          <c>0</c>
        </box>
        <asmtemplate><text>VACGE</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 vectors (field &quot;sz&quot;) [F16,F32]">&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="VACGE_A1_Q" oneofinclass="2" oneof="4" 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="VACGE" />
          <docvar key="simdvectorsize" value="quad" />
        </docvars>
        <box hibit="6" width="1" name="Q">
          <c>1</c>
        </box>
        <asmtemplate><text>VACGE</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 vectors (field &quot;sz&quot;) [F16,F32]">&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/VACGE/A1_A.txt" mylink="aarch32.instrs.VACGE.A1_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 sz == '1' &amp;&amp; !<a link="impl-shared.HaveFP16Ext.0" file="shared_pseudocode.xml" hover="function: boolean HaveFP16Ext()">HaveFP16Ext</a>() then UNDEFINED;
or_equal = (op == '0');
integer esize;
integer elements;
case sz of
    when '0' esize = 32; elements = 2;
    when '1' esize = 16; elements = 4;
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="T1" oneof="2" 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="VACGE" />
      </docvars>
      <iclassintro count="2"></iclassintro>
      <regdiagram form="16x2" psname="aarch32/instrs/VACGE/T1_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="U" settings="1">
          <c>1</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" name="op" usename="1" settings="1">
          <c>0</c>
        </box>
        <box hibit="20" name="sz" usename="1">
          <c></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>1</c>
          <c>0</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>1</c>
        </box>
        <box hibit="3" width="4" name="Vm" usename="1">
          <c colspan="4"></c>
        </box>
      </regdiagram>
      <encoding name="VACGE_T1_D" oneofinclass="2" oneof="4" 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="VACGE" />
          <docvar key="simdvectorsize" value="double" />
        </docvars>
        <box hibit="6" width="1" name="Q">
          <c>0</c>
        </box>
        <asmtemplate><text>VACGE</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 vectors (field &quot;sz&quot;) [F16,F32]">&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="VACGE_T1_Q" oneofinclass="2" oneof="4" 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="VACGE" />
          <docvar key="simdvectorsize" value="quad" />
        </docvars>
        <box hibit="6" width="1" name="Q">
          <c>1</c>
        </box>
        <asmtemplate><text>VACGE</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 vectors (field &quot;sz&quot;) [F16,F32]">&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/VACGE/T1_A.txt" mylink="aarch32.instrs.VACGE.T1_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 sz == '1' &amp;&amp; !<a link="impl-shared.HaveFP16Ext.0" file="shared_pseudocode.xml" hover="function: boolean HaveFP16Ext()">HaveFP16Ext</a>() then UNDEFINED;
if sz == '1' &amp;&amp; <a link="impl-aarch32.InITBlock.0" file="shared_pseudocode.xml" hover="function: boolean InITBlock()">InITBlock</a>() then UNPREDICTABLE;
or_equal = (op == '0');
integer esize;
integer elements;
case sz of
    when '0' esize = 32; elements = 2;
    when '1' esize = 16; elements = 4;
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>
      <constrained_unpredictables encoding="T1" ps_block="Decode">
        <cu_case>
          <cu_cause>
            <pstext mayhavelinks="1">sz == '1' &amp;&amp; InITBlock()</pstext>
          </cu_cause>
          <cu_type constraint="Constraint_UNDEF" />
          <cu_type>
            <cu_type_text>The instruction executes as if it passes the Condition code check.</cu_type_text>
          </cu_type>
          <cu_type>
            <cu_type_text>The instruction executes as NOP. This means it behaves as if it fails the Condition code check.</cu_type_text>
          </cu_type>
          <arch_variants>
            <arch_variant name="ARMv8.2-A" />
          </arch_variants>
        </cu_case>
      </constrained_unpredictables>
    </iclass>
  </classes>
  <explanations scope="all">
    <explanation enclist="VACGE_A1_Q" symboldefcount="1">
      <symbol link="sa_c_1">&lt;c&gt;</symbol>
      <account encodedin="">
        <docvars>
          <docvar key="armarmheading" value="A1" />
          <docvar key="isa" value="A32" />
        </docvars>
        <intro>
          <para>For encoding A1: see <xref linkend="Babbefhf">Standard assembler syntax fields</xref>. This encoding must be unconditional.</para>
        </intro>
      </account>
    </explanation>
    <explanation enclist="VACGE_T1_Q" symboldefcount="2">
      <symbol link="sa_c">&lt;c&gt;</symbol>
      <account encodedin="">
        <docvars>
          <docvar key="armarmheading" value="T1" />
          <docvar key="isa" value="T32" />
        </docvars>
        <intro>
          <para>For encoding T1: see <xref linkend="Babbefhf">Standard assembler syntax fields</xref>.</para>
        </intro>
      </account>
    </explanation>
    <explanation enclist="VACGE_A1_Q, VACGE_T1_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="VACGE_A1_Q, VACGE_T1_Q" symboldefcount="1">
      <symbol link="sa_dt">&lt;dt&gt;</symbol>
      <definition encodedin="sz">
        <intro>Is the data type for the elements of the vectors, </intro>
        <table class="valuetable">
          <tgroup cols="2">
            <thead>
              <row>
                <entry class="bitfield">sz</entry>
                <entry class="symbol">&lt;dt&gt;</entry>
              </row>
            </thead>
            <tbody>
              <row>
                <entry class="bitfield">0</entry>
                <entry class="symbol">F32</entry>
              </row>
              <row>
                <entry class="bitfield">1</entry>
                <entry class="symbol">F16</entry>
              </row>
            </tbody>
          </tgroup>
        </table>
      </definition>
      <arch_variants>
        <arch_variant name="ARMv8.2-A" />
      </arch_variants>
    </explanation>
    <explanation enclist="VACGE_A1_Q, VACGE_T1_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="VACGE_A1_Q, VACGE_T1_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="VACGE_A1_Q, VACGE_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="VACGE_A1_D, VACGE_T1_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="VACGE_A1_D, VACGE_T1_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="VACGE_A1_D, VACGE_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>
  <aliastablehook anchor="aliasconditions">Alias Conditions</aliastablehook>
  <ps_section howmany="1">
    <ps name="aarch32/instrs/VACGE/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>();
    for r = 0 to regs-1
        for e = 0 to elements-1
            op1 = <a link="impl-shared.FPAbs.1" file="shared_pseudocode.xml" hover="function: bits(N) FPAbs(bits(N) op)">FPAbs</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]);  op2 = <a link="impl-shared.FPAbs.1" file="shared_pseudocode.xml" hover="function: bits(N) FPAbs(bits(N) op)">FPAbs</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]);
            boolean test_passed;
            if or_equal then
                test_passed = <a link="impl-shared.FPCompareGE.3" file="shared_pseudocode.xml" hover="function: boolean FPCompareGE(bits(N) op1, bits(N) op2, FPCRType fpcr)">FPCompareGE</a>(op1, op2, <a link="impl-aarch32.StandardFPSCRValue.0" file="shared_pseudocode.xml" hover="function: FPCRType StandardFPSCRValue()">StandardFPSCRValue</a>());
            else
                test_passed = <a link="impl-shared.FPCompareGT.3" file="shared_pseudocode.xml" hover="function: boolean FPCompareGT(bits(N) op1, bits(N) op2, FPCRType fpcr)">FPCompareGT</a>(op1, op2, <a link="impl-aarch32.StandardFPSCRValue.0" file="shared_pseudocode.xml" hover="function: FPCRType StandardFPSCRValue()">StandardFPSCRValue</a>());
            <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] = if test_passed then <a link="impl-shared.Ones.1" file="shared_pseudocode.xml" hover="function: bits(N) Ones(integer N)">Ones</a>(esize) else <a link="impl-shared.Zeros.1" file="shared_pseudocode.xml" hover="function: bits(N) Zeros(integer N)">Zeros</a>(esize);</pstext>
    </ps>
  </ps_section>
</instructionsection>
