Files
archived-ballistic/spec/arm64_xml/addp_z_p_zz.xml
Ronald Caesar 26a677f8b4 decoder: Add ARM specification docs
Signed-off-by: Ronald Caesar <github43132@proton.me>
2025-12-12 18:11:36 -04:00

185 lines
11 KiB
XML

<?xml version="1.0" encoding="utf-8"?>
<?xml-stylesheet type="text/xsl" encoding="UTF-8" href="iform.xsl" version="1.0"?>
<!DOCTYPE instructionsection PUBLIC "-//ARM//DTD instructionsection //EN" "iform-p.dtd">
<!-- Copyright (c) 2010-2022 Arm Limited or its affiliates. All rights reserved. -->
<!-- This document is Non-Confidential. This document may only be used and distributed in accordance with the terms of the agreement entered into by Arm and the party that Arm delivered this document to. -->
<instructionsection id="addp_z_p_zz" title="ADDP" type="instruction">
<docvars>
<docvar key="instr-class" value="sve2" />
<docvar key="isa" value="A64" />
<docvar key="mnemonic" value="ADDP" />
</docvars>
<heading>ADDP</heading>
<desc>
<brief>Add pairwise</brief>
<description>
<para>Add pairs of adjacent elements within each source vector, and interleave the results from corresponding lanes. The interleaved result values are destructively placed in the first source vector.</para>
</description>
<status>Green</status>
<predicated>True</predicated>
<uses_dit condition="FEAT_SVE2 is implemented or FEAT_SME is implemented">True</uses_dit>
<takes_movprfx>True</takes_movprfx>
</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="ADDP" />
</docvars>
<iclassintro count="1"></iclassintro>
<regdiagram form="32" psname="ADDP-Z.P.ZZ-_" tworows="1">
<box hibit="31" width="8" settings="8">
<c>0</c>
<c>1</c>
<c>0</c>
<c>0</c>
<c>0</c>
<c>1</c>
<c>0</c>
<c>0</c>
</box>
<box hibit="23" width="2" name="size" usename="1">
<c colspan="2"></c>
</box>
<box hibit="21" width="3" settings="3">
<c>0</c>
<c>1</c>
<c>0</c>
</box>
<box hibit="18" name="opc&lt;1&gt;" settings="1">
<c>0</c>
</box>
<box hibit="17" name="opc&lt;0&gt;" settings="1">
<c>0</c>
</box>
<box hibit="16" name="U" usename="1" settings="1">
<c>1</c>
</box>
<box hibit="15" width="3" settings="3">
<c>1</c>
<c>0</c>
<c>1</c>
</box>
<box hibit="12" width="3" name="Pg" usename="1">
<c colspan="3"></c>
</box>
<box hibit="9" width="5" name="Zm" usename="1">
<c colspan="5"></c>
</box>
<box hibit="4" width="5" name="Zdn" usename="1">
<c colspan="5"></c>
</box>
</regdiagram>
<encoding name="addp_z_p_zz_" oneofinclass="1" oneof="1" label="">
<docvars>
<docvar key="instr-class" value="sve2" />
<docvar key="isa" value="A64" />
<docvar key="mnemonic" value="ADDP" />
</docvars>
<asmtemplate><text>ADDP </text><a link="sa_zdn" hover="First source and destination scalable vector register (field &quot;Zdn&quot;)">&lt;Zdn&gt;</a><text>.</text><a link="sa_t" hover="Size specifier (field &quot;size&quot;) [B,D,H,S]">&lt;T&gt;</a><text>, </text><a link="sa_pg" hover="Governing scalable predicate register P0-P7 (field &quot;Pg&quot;)">&lt;Pg&gt;</a><text>/M, </text><a link="sa_zdn" hover="First source and destination scalable vector register (field &quot;Zdn&quot;)">&lt;Zdn&gt;</a><text>.</text><a link="sa_t" hover="Size specifier (field &quot;size&quot;) [B,D,H,S]">&lt;T&gt;</a><text>, </text><a link="sa_zm" hover="Second source scalable vector register (field &quot;Zm&quot;)">&lt;Zm&gt;</a><text>.</text><a link="sa_t" hover="Size specifier (field &quot;size&quot;) [B,D,H,S]">&lt;T&gt;</a></asmtemplate>
</encoding>
<ps_section howmany="1">
<ps name="ADDP-Z.P.ZZ-_" mylink="ADDP-Z.P.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;
constant integer esize = 8 &lt;&lt; <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(size);
integer g = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(Pg);
integer m = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(Zm);
integer dn = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(Zdn);</pstext>
</ps>
</ps_section>
</iclass>
</classes>
<explanations scope="all">
<explanation enclist="addp_z_p_zz_" symboldefcount="1">
<symbol link="sa_zdn">&lt;Zdn&gt;</symbol>
<account encodedin="Zdn">
<intro>
<para>Is the name of the first source and destination scalable vector register, encoded in the "Zdn" field.</para>
</intro>
</account>
</explanation>
<explanation enclist="addp_z_p_zz_" symboldefcount="1">
<symbol link="sa_t">&lt;T&gt;</symbol>
<definition encodedin="size">
<intro>Is the size specifier, </intro>
<table class="valuetable">
<tgroup cols="2">
<thead>
<row>
<entry class="bitfield">size</entry>
<entry class="symbol">&lt;T&gt;</entry>
</row>
</thead>
<tbody>
<row>
<entry class="bitfield">00</entry>
<entry class="symbol">B</entry>
</row>
<row>
<entry class="bitfield">01</entry>
<entry class="symbol">H</entry>
</row>
<row>
<entry class="bitfield">10</entry>
<entry class="symbol">S</entry>
</row>
<row>
<entry class="bitfield">11</entry>
<entry class="symbol">D</entry>
</row>
</tbody>
</tgroup>
</table>
</definition>
</explanation>
<explanation enclist="addp_z_p_zz_" symboldefcount="1">
<symbol link="sa_pg">&lt;Pg&gt;</symbol>
<account encodedin="Pg">
<intro>
<para>Is the name of the governing scalable predicate register P0-P7, encoded in the "Pg" field.</para>
</intro>
</account>
</explanation>
<explanation enclist="addp_z_p_zz_" 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, encoded in the "Zm" field.</para>
</intro>
</account>
</explanation>
</explanations>
<ps_section howmany="1">
<ps name="ADDP-Z.P.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(PL) mask = <a link="impl-aarch64.P.read.2" file="shared_pseudocode.xml" hover="accessor: bits(width) P[integer n, integer width]">P</a>[g, PL];
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>[dn, VL];
bits(VL) operand2 = if <a link="impl-aarch64.AnyActiveElement.2" file="shared_pseudocode.xml" hover="function: boolean AnyActiveElement(bits(N) mask, integer esize)">AnyActiveElement</a>(mask, esize) then <a link="impl-aarch64.Z.read.2" file="shared_pseudocode.xml" hover="accessor: bits(width) Z[integer n, integer width]">Z</a>[m, VL] else <a link="impl-shared.Zeros.1" file="shared_pseudocode.xml" hover="function: bits(N) Zeros(integer N)">Zeros</a>(VL);
bits(VL) result;
integer element1;
integer element2;
for e = 0 to elements-1
if !<a link="impl-aarch64.ActivePredicateElement.3" file="shared_pseudocode.xml" hover="function: boolean ActivePredicateElement(bits(N) pred, integer e, integer esize)">ActivePredicateElement</a>(mask, e, esize) then
<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.Elem.read.3" file="shared_pseudocode.xml" hover="accessor: bits(size) Elem[bits(N) vector, integer e, integer size]">Elem</a>[operand1, e, esize];
else
if <a link="impl-aarch64.IsEven.1" file="shared_pseudocode.xml" hover="function: boolean IsEven(integer val)">IsEven</a>(e) then
element1 = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</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 + 0, esize]);
element2 = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</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 + 1, esize]);
else
element1 = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</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>[operand2, e - 1, esize]);
element2 = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</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>[operand2, e + 0, esize]);
integer res = element1 + element2;
<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] = res&lt;esize-1:0&gt;;
<a link="impl-aarch64.Z.write.2" file="shared_pseudocode.xml" hover="accessor: Z[integer n, integer width] = bits(width) value">Z</a>[dn, VL] = result;</pstext>
</ps>
</ps_section>
</instructionsection>