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<instructionsection id="fmls_za_zzi" title="FMLS (multiple and indexed vector)" type="instruction">
  <docvars>
    <docvar key="instr-class" value="mortlach2" />
    <docvar key="isa" value="A64" />
    <docvar key="mnemonic" value="FMLS" />
  </docvars>
  <heading>FMLS (multiple and indexed vector)</heading>
  <desc>
    <brief>Multi-vector floating-point fused multiply-subtract by indexed element</brief>
    <description>
      <para>The instruction operates on two or four ZA single-vector groups.</para>
      <para>Multiply the indexed element of the second source vector by the corresponding floating-point elements of the two or four first source vectors and destructively subtract without intermediate rounding from the corresponding elements of the two or four ZA single-vector groups.</para>
      <para>The elements within the second source vector are specified using an immediate element index which selects the same element position within each 128-bit vector segment. The index range is from 0 to one less than the number of elements per 128-bit segment, encoded in 1 to 2 bits depending on the size of the element. The vector numbers forming the single-vector group within each half or each quarter of the ZA array are selected by the sum of the vector select register and immediate offset, modulo half or quarter the number of ZA array vectors.</para>
      <para>The <arm-defined-word>vector group</arm-defined-word> symbol, <syntax>VGx2</syntax> or <syntax>VGx4</syntax>, indicates that the ZA operand consists of two or four ZA single-vector groups respectively. The <arm-defined-word>vector group</arm-defined-word> symbol is preferred for disassembly, but optional in assembler source code.</para>
      <para>This instruction follows SME ZA-targeting floating-point behaviors.</para>
      <para>This instruction is unpredicated.</para>
      <para>ID_AA64SMFR0_EL1.F64F64 indicates whether the double-precision variant is implemented, and ID_AA64SMFR0_EL1.F16F16 indicates whether the half-precision variant is implemented.</para>
    </description>
    <status>Green</status>
    <predicated>False</predicated>
    <sm_policy>SM_1_only</sm_policy>
  </desc>
  <alias_list howmany="0"></alias_list>
  <classes>
    <classesintro count="6">
      <txt>It has encodings from 6 classes:</txt>
      <a href="#iclass_sme_vgx2hp_single">Two ZA single-vectors of half precision elements</a>
      <txt>, </txt>
      <a href="#iclass_sme_vgx2sp_single">Two ZA single-vectors of single precision elements</a>
      <txt>, </txt>
      <a href="#iclass_sme_vgx2dp_single">Two ZA single-vectors of double precision elements</a>
      <txt>, </txt>
      <a href="#iclass_sme_vgx4hp_single">Four ZA single-vectors of half precision elements</a>
      <txt>, </txt>
      <a href="#iclass_sme_vgx4sp_single">Four ZA single-vectors of single precision elements</a>
      <txt> and </txt>
      <a href="#iclass_sme_vgx4dp_single">Four ZA single-vectors of double precision elements</a>
    </classesintro>
    <iclass name="Two ZA single-vectors of half precision elements" oneof="6" id="iclass_sme_vgx2hp_single" no_encodings="1" isa="A64">
      <docvars>
        <docvar key="instr-class" value="mortlach2" />
        <docvar key="isa" value="A64" />
        <docvar key="mnemonic" value="FMLS" />
        <docvar key="sme-multireg" value="sme-vgx2hp-single" />
      </docvars>
      <iclassintro count="1"></iclassintro>
      <arch_variants>
        <arch_variant name="FEAT_SME_F16F16" feature="FEAT_SME_F16F16" />
      </arch_variants>
      <regdiagram form="32" psname="FMLS-ZA.ZZi-H2xi" tworows="1">
        <box hibit="31" width="12" settings="12">
          <c>1</c>
          <c>1</c>
          <c>0</c>
          <c>0</c>
          <c>0</c>
          <c>0</c>
          <c>0</c>
          <c>1</c>
          <c>0</c>
          <c>0</c>
          <c>0</c>
          <c>1</c>
        </box>
        <box hibit="19" width="4" name="Zm" usename="1">
          <c colspan="4"></c>
        </box>
        <box hibit="15" settings="1">
          <c>0</c>
        </box>
        <box hibit="14" width="2" name="Rv" usename="1">
          <c colspan="2"></c>
        </box>
        <box hibit="12" settings="1">
          <c>1</c>
        </box>
        <box hibit="11" width="2" name="i3h" usename="1">
          <c colspan="2"></c>
        </box>
        <box hibit="9" width="4" name="Zn" usename="1">
          <c colspan="4"></c>
        </box>
        <box hibit="5" name="op" settings="1">
          <c>0</c>
        </box>
        <box hibit="4" name="S" usename="1" settings="1">
          <c>1</c>
        </box>
        <box hibit="3" name="i3l" usename="1">
          <c></c>
        </box>
        <box hibit="2" width="3" name="off3" usename="1">
          <c colspan="3"></c>
        </box>
      </regdiagram>
      <encoding name="fmls_za_zzi_h2xi" oneofinclass="1" oneof="6" label="">
        <docvars>
          <docvar key="instr-class" value="mortlach2" />
          <docvar key="isa" value="A64" />
          <docvar key="mnemonic" value="FMLS" />
          <docvar key="sme-multireg" value="sme-vgx2hp-single" />
        </docvars>
        <asmtemplate><text>FMLS    ZA.H[</text><a link="sa_wv" hover="32-bit vector select register W8-W11 (field &quot;Rv&quot;)">&lt;Wv&gt;</a><text>, </text><a link="sa_offs" hover="Vector select offset [0-7] (field &quot;off3&quot;)">&lt;offs&gt;</a><a>{, VGx2}</a><text>], </text><text>{</text><text> </text><a link="sa_zn1" hover="First scalable vector register of a multi-vector sequence (field Zn)">&lt;Zn1&gt;</a><text>.H-</text><a link="sa_zn2" hover="Second scalable vector register of a multi-vector sequence (field Zn)">&lt;Zn2&gt;</a><text>.H </text><text>}</text><text>, </text><a link="sa_zm" hover="Second source scalable vector register Z0-Z15 (field &quot;Zm&quot;)">&lt;Zm&gt;</a><text>.H[</text><a link="sa_index_1" hover="Element index [0-7] (field &quot;i3h:i3l&quot;)">&lt;index&gt;</a><text>]</text></asmtemplate>
      </encoding>
      <ps_section howmany="1">
        <ps name="FMLS-ZA.ZZi-H2xi" mylink="FMLS-ZA.ZZi-H2xi" enclabels="" sections="1" secttype="noheading">
          <pstext mayhavelinks="1" section="Decode" rep_section="decode">if !<a link="impl-aarch64.HaveSMEF16F16.0" file="shared_pseudocode.xml" hover="function: boolean HaveSMEF16F16()">HaveSMEF16F16</a>() then UNDEFINED;
integer v = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>('010':Rv);
constant integer esize = 16;
integer n = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(Zn:'0');
integer m = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>('0':Zm);
integer offset = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(off3);
integer index = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(i3h:i3l);
boolean sub_op = TRUE;
constant integer nreg = 2;</pstext>
        </ps>
      </ps_section>
    </iclass>
    <iclass name="Two ZA single-vectors of single precision elements" oneof="6" id="iclass_sme_vgx2sp_single" no_encodings="1" isa="A64">
      <docvars>
        <docvar key="instr-class" value="mortlach2" />
        <docvar key="isa" value="A64" />
        <docvar key="mnemonic" value="FMLS" />
        <docvar key="sme-multireg" value="sme-vgx2sp-single" />
      </docvars>
      <iclassintro count="1"></iclassintro>
      <arch_variants>
        <arch_variant name="FEAT_SME2" feature="FEAT_SME2" />
      </arch_variants>
      <regdiagram form="32" psname="FMLS-ZA.ZZi-S2xi" tworows="1">
        <box hibit="31" width="12" settings="12">
          <c>1</c>
          <c>1</c>
          <c>0</c>
          <c>0</c>
          <c>0</c>
          <c>0</c>
          <c>0</c>
          <c>1</c>
          <c>0</c>
          <c>1</c>
          <c>0</c>
          <c>1</c>
        </box>
        <box hibit="19" width="4" name="Zm" usename="1">
          <c colspan="4"></c>
        </box>
        <box hibit="15" settings="1">
          <c>0</c>
        </box>
        <box hibit="14" width="2" name="Rv" usename="1">
          <c colspan="2"></c>
        </box>
        <box hibit="12" name="op" settings="1">
          <c>0</c>
        </box>
        <box hibit="11" width="2" name="i2" usename="1">
          <c colspan="2"></c>
        </box>
        <box hibit="9" width="4" name="Zn" usename="1">
          <c colspan="4"></c>
        </box>
        <box hibit="5" settings="1">
          <c>0</c>
        </box>
        <box hibit="4" name="S" usename="1" settings="1">
          <c>1</c>
        </box>
        <box hibit="3" settings="1">
          <c>0</c>
        </box>
        <box hibit="2" width="3" name="off3" usename="1">
          <c colspan="3"></c>
        </box>
      </regdiagram>
      <encoding name="fmls_za_zzi_s2xi" oneofinclass="1" oneof="6" label="">
        <docvars>
          <docvar key="instr-class" value="mortlach2" />
          <docvar key="isa" value="A64" />
          <docvar key="mnemonic" value="FMLS" />
          <docvar key="sme-multireg" value="sme-vgx2sp-single" />
        </docvars>
        <asmtemplate><text>FMLS    ZA.S[</text><a link="sa_wv" hover="32-bit vector select register W8-W11 (field &quot;Rv&quot;)">&lt;Wv&gt;</a><text>, </text><a link="sa_offs" hover="Vector select offset [0-7] (field &quot;off3&quot;)">&lt;offs&gt;</a><a>{, VGx2}</a><text>], </text><text>{</text><text> </text><a link="sa_zn1" hover="First scalable vector register of a multi-vector sequence (field Zn)">&lt;Zn1&gt;</a><text>.S-</text><a link="sa_zn2" hover="Second scalable vector register of a multi-vector sequence (field Zn)">&lt;Zn2&gt;</a><text>.S </text><text>}</text><text>, </text><a link="sa_zm" hover="Second source scalable vector register Z0-Z15 (field &quot;Zm&quot;)">&lt;Zm&gt;</a><text>.S[</text><a link="sa_index_2" hover="Element index [0-3] (field &quot;i2&quot;)">&lt;index&gt;</a><text>]</text></asmtemplate>
      </encoding>
      <ps_section howmany="1">
        <ps name="FMLS-ZA.ZZi-S2xi" mylink="FMLS-ZA.ZZi-S2xi" enclabels="" sections="1" secttype="noheading">
          <pstext mayhavelinks="1" section="Decode" rep_section="decode">if !<a link="impl-aarch64.HaveSME2.0" file="shared_pseudocode.xml" hover="function: boolean HaveSME2()">HaveSME2</a>() then UNDEFINED;
integer v = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>('010':Rv);
constant integer esize = 32;
integer n = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(Zn:'0');
integer m = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>('0':Zm);
integer offset = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(off3);
integer index = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(i2);
boolean sub_op = TRUE;
constant integer nreg = 2;</pstext>
        </ps>
      </ps_section>
    </iclass>
    <iclass name="Two ZA single-vectors of double precision elements" oneof="6" id="iclass_sme_vgx2dp_single" no_encodings="1" isa="A64">
      <docvars>
        <docvar key="instr-class" value="mortlach2" />
        <docvar key="isa" value="A64" />
        <docvar key="mnemonic" value="FMLS" />
        <docvar key="sme-multireg" value="sme-vgx2dp-single" />
      </docvars>
      <iclassintro count="1"></iclassintro>
      <arch_variants>
        <arch_variant name="FEAT_SME_F64F64" feature="FEAT_SME_F64F64" />
      </arch_variants>
      <regdiagram form="32" psname="FMLS-ZA.ZZi-D2xi" tworows="1">
        <box hibit="31" width="12" settings="12">
          <c>1</c>
          <c>1</c>
          <c>0</c>
          <c>0</c>
          <c>0</c>
          <c>0</c>
          <c>0</c>
          <c>1</c>
          <c>1</c>
          <c>1</c>
          <c>0</c>
          <c>1</c>
        </box>
        <box hibit="19" width="4" name="Zm" usename="1">
          <c colspan="4"></c>
        </box>
        <box hibit="15" settings="1">
          <c>0</c>
        </box>
        <box hibit="14" width="2" name="Rv" usename="1">
          <c colspan="2"></c>
        </box>
        <box hibit="12" width="2" settings="2">
          <c>0</c>
          <c>0</c>
        </box>
        <box hibit="10" name="i1" usename="1">
          <c></c>
        </box>
        <box hibit="9" width="4" name="Zn" usename="1">
          <c colspan="4"></c>
        </box>
        <box hibit="5" settings="1">
          <c>0</c>
        </box>
        <box hibit="4" name="S" usename="1" settings="1">
          <c>1</c>
        </box>
        <box hibit="3" settings="1">
          <c>0</c>
        </box>
        <box hibit="2" width="3" name="off3" usename="1">
          <c colspan="3"></c>
        </box>
      </regdiagram>
      <encoding name="fmls_za_zzi_d2xi" oneofinclass="1" oneof="6" label="">
        <docvars>
          <docvar key="instr-class" value="mortlach2" />
          <docvar key="isa" value="A64" />
          <docvar key="mnemonic" value="FMLS" />
          <docvar key="sme-multireg" value="sme-vgx2dp-single" />
        </docvars>
        <asmtemplate><text>FMLS    ZA.D[</text><a link="sa_wv" hover="32-bit vector select register W8-W11 (field &quot;Rv&quot;)">&lt;Wv&gt;</a><text>, </text><a link="sa_offs" hover="Vector select offset [0-7] (field &quot;off3&quot;)">&lt;offs&gt;</a><a>{, VGx2}</a><text>], </text><text>{</text><text> </text><a link="sa_zn1" hover="First scalable vector register of a multi-vector sequence (field Zn)">&lt;Zn1&gt;</a><text>.D-</text><a link="sa_zn2" hover="Second scalable vector register of a multi-vector sequence (field Zn)">&lt;Zn2&gt;</a><text>.D </text><text>}</text><text>, </text><a link="sa_zm" hover="Second source scalable vector register Z0-Z15 (field &quot;Zm&quot;)">&lt;Zm&gt;</a><text>.D[</text><a link="sa_index" hover="Element index [0-1] (field &quot;i1&quot;)">&lt;index&gt;</a><text>]</text></asmtemplate>
      </encoding>
      <ps_section howmany="1">
        <ps name="FMLS-ZA.ZZi-D2xi" mylink="FMLS-ZA.ZZi-D2xi" enclabels="" sections="1" secttype="noheading">
          <pstext mayhavelinks="1" section="Decode" rep_section="decode">if !(<a link="impl-aarch64.HaveSME2.0" file="shared_pseudocode.xml" hover="function: boolean HaveSME2()">HaveSME2</a>() &amp;&amp; <a link="impl-aarch64.HaveSMEF64F64.0" file="shared_pseudocode.xml" hover="function: boolean HaveSMEF64F64()">HaveSMEF64F64</a>()) then UNDEFINED;
integer v = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>('010':Rv);
constant integer esize = 64;
integer n = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(Zn:'0');
integer m = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>('0':Zm);
integer offset = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(off3);
integer index = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(i1);
boolean sub_op = TRUE;
constant integer nreg = 2;</pstext>
        </ps>
      </ps_section>
    </iclass>
    <iclass name="Four ZA single-vectors of half precision elements" oneof="6" id="iclass_sme_vgx4hp_single" no_encodings="1" isa="A64">
      <docvars>
        <docvar key="instr-class" value="mortlach2" />
        <docvar key="isa" value="A64" />
        <docvar key="mnemonic" value="FMLS" />
        <docvar key="sme-multireg" value="sme-vgx4hp-single" />
      </docvars>
      <iclassintro count="1"></iclassintro>
      <arch_variants>
        <arch_variant name="FEAT_SME_F16F16" feature="FEAT_SME_F16F16" />
      </arch_variants>
      <regdiagram form="32" psname="FMLS-ZA.ZZi-H4xi" tworows="1">
        <box hibit="31" width="12" settings="12">
          <c>1</c>
          <c>1</c>
          <c>0</c>
          <c>0</c>
          <c>0</c>
          <c>0</c>
          <c>0</c>
          <c>1</c>
          <c>0</c>
          <c>0</c>
          <c>0</c>
          <c>1</c>
        </box>
        <box hibit="19" width="4" name="Zm" usename="1">
          <c colspan="4"></c>
        </box>
        <box hibit="15" settings="1">
          <c>1</c>
        </box>
        <box hibit="14" width="2" name="Rv" usename="1">
          <c colspan="2"></c>
        </box>
        <box hibit="12" settings="1">
          <c>1</c>
        </box>
        <box hibit="11" width="2" name="i3h" usename="1">
          <c colspan="2"></c>
        </box>
        <box hibit="9" width="3" name="Zn" usename="1">
          <c colspan="3"></c>
        </box>
        <box hibit="6" settings="1">
          <c>0</c>
        </box>
        <box hibit="5" name="op" settings="1">
          <c>0</c>
        </box>
        <box hibit="4" name="S" usename="1" settings="1">
          <c>1</c>
        </box>
        <box hibit="3" name="i3l" usename="1">
          <c></c>
        </box>
        <box hibit="2" width="3" name="off3" usename="1">
          <c colspan="3"></c>
        </box>
      </regdiagram>
      <encoding name="fmls_za_zzi_h4xi" oneofinclass="1" oneof="6" label="">
        <docvars>
          <docvar key="instr-class" value="mortlach2" />
          <docvar key="isa" value="A64" />
          <docvar key="mnemonic" value="FMLS" />
          <docvar key="sme-multireg" value="sme-vgx4hp-single" />
        </docvars>
        <asmtemplate><text>FMLS    ZA.H[</text><a link="sa_wv" hover="32-bit vector select register W8-W11 (field &quot;Rv&quot;)">&lt;Wv&gt;</a><text>, </text><a link="sa_offs" hover="Vector select offset [0-7] (field &quot;off3&quot;)">&lt;offs&gt;</a><a>{, VGx4}</a><text>], </text><text>{</text><text> </text><a link="sa_zn1_1" hover="First scalable vector register of a multi-vector sequence (field Zn)">&lt;Zn1&gt;</a><text>.H-</text><a link="sa_zn4" hover="Fourth scalable vector register of a multi-vector sequence (field Zn)">&lt;Zn4&gt;</a><text>.H </text><text>}</text><text>, </text><a link="sa_zm" hover="Second source scalable vector register Z0-Z15 (field &quot;Zm&quot;)">&lt;Zm&gt;</a><text>.H[</text><a link="sa_index_1" hover="Element index [0-7] (field &quot;i3h:i3l&quot;)">&lt;index&gt;</a><text>]</text></asmtemplate>
      </encoding>
      <ps_section howmany="1">
        <ps name="FMLS-ZA.ZZi-H4xi" mylink="FMLS-ZA.ZZi-H4xi" enclabels="" sections="1" secttype="noheading">
          <pstext mayhavelinks="1" section="Decode" rep_section="decode">if !<a link="impl-aarch64.HaveSMEF16F16.0" file="shared_pseudocode.xml" hover="function: boolean HaveSMEF16F16()">HaveSMEF16F16</a>() then UNDEFINED;
integer v = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>('010':Rv);
constant integer esize = 16;
integer n = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(Zn:'00');
integer m = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>('0':Zm);
integer offset = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(off3);
integer index = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(i3h:i3l);
boolean sub_op = TRUE;
constant integer nreg = 4;</pstext>
        </ps>
      </ps_section>
    </iclass>
    <iclass name="Four ZA single-vectors of single precision elements" oneof="6" id="iclass_sme_vgx4sp_single" no_encodings="1" isa="A64">
      <docvars>
        <docvar key="instr-class" value="mortlach2" />
        <docvar key="isa" value="A64" />
        <docvar key="mnemonic" value="FMLS" />
        <docvar key="sme-multireg" value="sme-vgx4sp-single" />
      </docvars>
      <iclassintro count="1"></iclassintro>
      <arch_variants>
        <arch_variant name="FEAT_SME2" feature="FEAT_SME2" />
      </arch_variants>
      <regdiagram form="32" psname="FMLS-ZA.ZZi-S4xi" tworows="1">
        <box hibit="31" width="12" settings="12">
          <c>1</c>
          <c>1</c>
          <c>0</c>
          <c>0</c>
          <c>0</c>
          <c>0</c>
          <c>0</c>
          <c>1</c>
          <c>0</c>
          <c>1</c>
          <c>0</c>
          <c>1</c>
        </box>
        <box hibit="19" width="4" name="Zm" usename="1">
          <c colspan="4"></c>
        </box>
        <box hibit="15" settings="1">
          <c>1</c>
        </box>
        <box hibit="14" width="2" name="Rv" usename="1">
          <c colspan="2"></c>
        </box>
        <box hibit="12" name="op" settings="1">
          <c>0</c>
        </box>
        <box hibit="11" width="2" name="i2" usename="1">
          <c colspan="2"></c>
        </box>
        <box hibit="9" width="3" name="Zn" usename="1">
          <c colspan="3"></c>
        </box>
        <box hibit="6" settings="1">
          <c>0</c>
        </box>
        <box hibit="5" settings="1">
          <c>0</c>
        </box>
        <box hibit="4" name="S" usename="1" settings="1">
          <c>1</c>
        </box>
        <box hibit="3" settings="1">
          <c>0</c>
        </box>
        <box hibit="2" width="3" name="off3" usename="1">
          <c colspan="3"></c>
        </box>
      </regdiagram>
      <encoding name="fmls_za_zzi_s4xi" oneofinclass="1" oneof="6" label="">
        <docvars>
          <docvar key="instr-class" value="mortlach2" />
          <docvar key="isa" value="A64" />
          <docvar key="mnemonic" value="FMLS" />
          <docvar key="sme-multireg" value="sme-vgx4sp-single" />
        </docvars>
        <asmtemplate><text>FMLS    ZA.S[</text><a link="sa_wv" hover="32-bit vector select register W8-W11 (field &quot;Rv&quot;)">&lt;Wv&gt;</a><text>, </text><a link="sa_offs" hover="Vector select offset [0-7] (field &quot;off3&quot;)">&lt;offs&gt;</a><a>{, VGx4}</a><text>], </text><text>{</text><text> </text><a link="sa_zn1_1" hover="First scalable vector register of a multi-vector sequence (field Zn)">&lt;Zn1&gt;</a><text>.S-</text><a link="sa_zn4" hover="Fourth scalable vector register of a multi-vector sequence (field Zn)">&lt;Zn4&gt;</a><text>.S </text><text>}</text><text>, </text><a link="sa_zm" hover="Second source scalable vector register Z0-Z15 (field &quot;Zm&quot;)">&lt;Zm&gt;</a><text>.S[</text><a link="sa_index_2" hover="Element index [0-3] (field &quot;i2&quot;)">&lt;index&gt;</a><text>]</text></asmtemplate>
      </encoding>
      <ps_section howmany="1">
        <ps name="FMLS-ZA.ZZi-S4xi" mylink="FMLS-ZA.ZZi-S4xi" enclabels="" sections="1" secttype="noheading">
          <pstext mayhavelinks="1" section="Decode" rep_section="decode">if !<a link="impl-aarch64.HaveSME2.0" file="shared_pseudocode.xml" hover="function: boolean HaveSME2()">HaveSME2</a>() then UNDEFINED;
integer v = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>('010':Rv);
constant integer esize = 32;
integer n = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(Zn:'00');
integer m = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>('0':Zm);
integer offset = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(off3);
integer index = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(i2);
boolean sub_op = TRUE;
constant integer nreg = 4;</pstext>
        </ps>
      </ps_section>
    </iclass>
    <iclass name="Four ZA single-vectors of double precision elements" oneof="6" id="iclass_sme_vgx4dp_single" no_encodings="1" isa="A64">
      <docvars>
        <docvar key="instr-class" value="mortlach2" />
        <docvar key="isa" value="A64" />
        <docvar key="mnemonic" value="FMLS" />
        <docvar key="sme-multireg" value="sme-vgx4dp-single" />
      </docvars>
      <iclassintro count="1"></iclassintro>
      <arch_variants>
        <arch_variant name="FEAT_SME_F64F64" feature="FEAT_SME_F64F64" />
      </arch_variants>
      <regdiagram form="32" psname="FMLS-ZA.ZZi-D4xi" tworows="1">
        <box hibit="31" width="12" settings="12">
          <c>1</c>
          <c>1</c>
          <c>0</c>
          <c>0</c>
          <c>0</c>
          <c>0</c>
          <c>0</c>
          <c>1</c>
          <c>1</c>
          <c>1</c>
          <c>0</c>
          <c>1</c>
        </box>
        <box hibit="19" width="4" name="Zm" usename="1">
          <c colspan="4"></c>
        </box>
        <box hibit="15" settings="1">
          <c>1</c>
        </box>
        <box hibit="14" width="2" name="Rv" usename="1">
          <c colspan="2"></c>
        </box>
        <box hibit="12" settings="1">
          <c>0</c>
        </box>
        <box hibit="11" name="op" settings="1">
          <c>0</c>
        </box>
        <box hibit="10" name="i1" usename="1">
          <c></c>
        </box>
        <box hibit="9" width="3" name="Zn" usename="1">
          <c colspan="3"></c>
        </box>
        <box hibit="6" width="2" settings="2">
          <c>0</c>
          <c>0</c>
        </box>
        <box hibit="4" name="S" usename="1" settings="1">
          <c>1</c>
        </box>
        <box hibit="3" settings="1">
          <c>0</c>
        </box>
        <box hibit="2" width="3" name="off3" usename="1">
          <c colspan="3"></c>
        </box>
      </regdiagram>
      <encoding name="fmls_za_zzi_d4xi" oneofinclass="1" oneof="6" label="">
        <docvars>
          <docvar key="instr-class" value="mortlach2" />
          <docvar key="isa" value="A64" />
          <docvar key="mnemonic" value="FMLS" />
          <docvar key="sme-multireg" value="sme-vgx4dp-single" />
        </docvars>
        <asmtemplate><text>FMLS    ZA.D[</text><a link="sa_wv" hover="32-bit vector select register W8-W11 (field &quot;Rv&quot;)">&lt;Wv&gt;</a><text>, </text><a link="sa_offs" hover="Vector select offset [0-7] (field &quot;off3&quot;)">&lt;offs&gt;</a><a>{, VGx4}</a><text>], </text><text>{</text><text> </text><a link="sa_zn1_1" hover="First scalable vector register of a multi-vector sequence (field Zn)">&lt;Zn1&gt;</a><text>.D-</text><a link="sa_zn4" hover="Fourth scalable vector register of a multi-vector sequence (field Zn)">&lt;Zn4&gt;</a><text>.D </text><text>}</text><text>, </text><a link="sa_zm" hover="Second source scalable vector register Z0-Z15 (field &quot;Zm&quot;)">&lt;Zm&gt;</a><text>.D[</text><a link="sa_index" hover="Element index [0-1] (field &quot;i1&quot;)">&lt;index&gt;</a><text>]</text></asmtemplate>
      </encoding>
      <ps_section howmany="1">
        <ps name="FMLS-ZA.ZZi-D4xi" mylink="FMLS-ZA.ZZi-D4xi" enclabels="" sections="1" secttype="noheading">
          <pstext mayhavelinks="1" section="Decode" rep_section="decode">if !(<a link="impl-aarch64.HaveSME2.0" file="shared_pseudocode.xml" hover="function: boolean HaveSME2()">HaveSME2</a>() &amp;&amp; <a link="impl-aarch64.HaveSMEF64F64.0" file="shared_pseudocode.xml" hover="function: boolean HaveSMEF64F64()">HaveSMEF64F64</a>()) then UNDEFINED;
integer v = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>('010':Rv);
constant integer esize = 64;
integer n = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(Zn:'00');
integer m = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>('0':Zm);
integer offset = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(off3);
integer index = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(i1);
boolean sub_op = TRUE;
constant integer nreg = 4;</pstext>
        </ps>
      </ps_section>
    </iclass>
  </classes>
  <explanations scope="all">
    <explanation enclist="fmls_za_zzi_d2xi, fmls_za_zzi_d4xi, fmls_za_zzi_h2xi, fmls_za_zzi_h4xi, fmls_za_zzi_s2xi, fmls_za_zzi_s4xi" symboldefcount="1">
      <symbol link="sa_wv">&lt;Wv&gt;</symbol>
      <account encodedin="Rv">
        <intro>
          <para>Is the 32-bit name of the vector select register W8-W11, encoded in the "Rv" field.</para>
        </intro>
      </account>
    </explanation>
    <explanation enclist="fmls_za_zzi_d2xi, fmls_za_zzi_d4xi, fmls_za_zzi_h2xi, fmls_za_zzi_h4xi, fmls_za_zzi_s2xi, fmls_za_zzi_s4xi" symboldefcount="1">
      <symbol link="sa_offs">&lt;offs&gt;</symbol>
      <account encodedin="off3">
        <intro>
          <para>Is the vector select offset, in the range 0 to 7, encoded in the "off3" field.</para>
        </intro>
      </account>
    </explanation>
    <explanation enclist="fmls_za_zzi_d2xi, fmls_za_zzi_h2xi, fmls_za_zzi_s2xi" symboldefcount="1">
      <symbol link="sa_zn1">&lt;Zn1&gt;</symbol>
      <account encodedin="Zn">
        <intro>
          <para>For the two ZA single-vectors of double precision elements, two ZA single-vectors of half precision elements and two ZA single-vectors of single precision elements variant: is the name of the first scalable vector register of a multi-vector sequence, encoded as "Zn" times 2.</para>
        </intro>
      </account>
    </explanation>
    <explanation enclist="fmls_za_zzi_d4xi, fmls_za_zzi_h4xi, fmls_za_zzi_s4xi" symboldefcount="2">
      <symbol link="sa_zn1_1">&lt;Zn1&gt;</symbol>
      <account encodedin="Zn">
        <intro>
          <para>For the four ZA single-vectors of double precision elements, four ZA single-vectors of half precision elements and four ZA single-vectors of single precision elements variant: is the name of the first scalable vector register of a multi-vector sequence, encoded as "Zn" times 4.</para>
        </intro>
      </account>
    </explanation>
    <explanation enclist="fmls_za_zzi_d4xi, fmls_za_zzi_h4xi, fmls_za_zzi_s4xi" symboldefcount="1">
      <symbol link="sa_zn4">&lt;Zn4&gt;</symbol>
      <account encodedin="Zn">
        <intro>
          <para>Is the name of the fourth scalable vector register of a multi-vector sequence, encoded as "Zn" times 4 plus 3.</para>
        </intro>
      </account>
    </explanation>
    <explanation enclist="fmls_za_zzi_d2xi, fmls_za_zzi_h2xi, fmls_za_zzi_s2xi" symboldefcount="1">
      <symbol link="sa_zn2">&lt;Zn2&gt;</symbol>
      <account encodedin="Zn">
        <intro>
          <para>Is the name of the second scalable vector register of a multi-vector sequence, encoded as "Zn" times 2 plus 1.</para>
        </intro>
      </account>
    </explanation>
    <explanation enclist="fmls_za_zzi_d2xi, fmls_za_zzi_d4xi, fmls_za_zzi_h2xi, fmls_za_zzi_h4xi, fmls_za_zzi_s2xi, fmls_za_zzi_s4xi" symboldefcount="1">
      <symbol link="sa_zm">&lt;Zm&gt;</symbol>
      <account encodedin="Zm">
        <intro>
          <para>Is the name of the second source scalable vector register Z0-Z15, encoded in the "Zm" field.</para>
        </intro>
      </account>
    </explanation>
    <explanation enclist="fmls_za_zzi_h2xi, fmls_za_zzi_h4xi" symboldefcount="1">
      <symbol link="sa_index_1">&lt;index&gt;</symbol>
      <account encodedin="i3h:i3l">
        <intro>
          <para>For the four ZA single-vectors of half precision elements and two ZA single-vectors of half precision elements variant: is the element index, in the range 0 to 7, encoded in the "i3h:i3l" fields.</para>
        </intro>
      </account>
    </explanation>
    <explanation enclist="fmls_za_zzi_s2xi, fmls_za_zzi_s4xi" symboldefcount="2">
      <symbol link="sa_index_2">&lt;index&gt;</symbol>
      <account encodedin="i2">
        <intro>
          <para>For the four ZA single-vectors of single precision elements and two ZA single-vectors of single precision elements variant: is the element index, in the range 0 to 3, encoded in the "i2" field.</para>
        </intro>
      </account>
    </explanation>
    <explanation enclist="fmls_za_zzi_d2xi, fmls_za_zzi_d4xi" symboldefcount="3">
      <symbol link="sa_index">&lt;index&gt;</symbol>
      <account encodedin="i1">
        <intro>
          <para>For the four ZA single-vectors of double precision elements and two ZA single-vectors of double precision elements variant: is the element index, in the range 0 to 1, encoded in the "i1" field.</para>
        </intro>
      </account>
    </explanation>
  </explanations>
  <ps_section howmany="1">
    <ps name="FMLS-ZA.ZZi-H2xi" mylink="execute" enclabels="" sections="1" secttype="Operation">
      <pstext mayhavelinks="1" section="Execute" rep_section="execute"><a link="impl-aarch64.CheckStreamingSVEAndZAEnabled.0" file="shared_pseudocode.xml" hover="function: CheckStreamingSVEAndZAEnabled()">CheckStreamingSVEAndZAEnabled</a>();
constant integer VL = <a link="impl-aarch64.CurrentVL.read.none" file="shared_pseudocode.xml" hover="accessor: integer CurrentVL">CurrentVL</a>;
constant integer elements = VL DIV esize;
integer vectors = VL DIV 8;
integer vstride = vectors DIV nreg;
integer eltspersegment = 128 DIV esize;
bits(32) vbase = <a link="impl-aarch64.X.read.2" file="shared_pseudocode.xml" hover="accessor: bits(width) X[integer n, integer width]">X</a>[v, 32];
integer vec = (<a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(vbase) + offset) MOD vstride;
bits(VL) result;

for r = 0 to nreg-1
    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+r, VL];
    bits(VL) operand2 = <a link="impl-aarch64.Z.read.2" file="shared_pseudocode.xml" hover="accessor: bits(width) Z[integer n, integer width]">Z</a>[m, VL];
    bits(VL) operand3 = <a link="impl-aarch64.ZAvector.read.2" file="shared_pseudocode.xml" hover="accessor: bits(width) ZAvector[integer index, integer width]">ZAvector</a>[vec, VL];
    for e = 0 to elements-1
        bits(esize) element1 = <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];
        integer segmentbase = e - (e MOD eltspersegment);
        integer s = segmentbase + index;
        bits(esize) element2 = <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>[operand2, s, esize];
        bits(esize) element3 = <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>[operand3, e, esize];
        if sub_op then element1 = <a link="impl-shared.FPNeg.1" file="shared_pseudocode.xml" hover="function: bits(N) FPNeg(bits(N) op)">FPNeg</a>(element1);
        <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, e, esize] = <a link="impl-shared.FPMulAdd_ZA.4" file="shared_pseudocode.xml" hover="function: bits(N) FPMulAdd_ZA(bits(N) addend, bits(N) op1, bits(N) op2, FPCRType fpcr_in)">FPMulAdd_ZA</a>(element3, element1, element2, FPCR[]);
    <a link="impl-aarch64.ZAvector.write.2" file="shared_pseudocode.xml" hover="accessor: ZAvector[integer index, integer width] = bits(width) value">ZAvector</a>[vec, VL] = result;
    vec = vec + vstride;</pstext>
    </ps>
  </ps_section>
</instructionsection>
