mirror of
https://github.com/pound-emu/ballistic.git
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161 lines
8.3 KiB
XML
161 lines
8.3 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<?xml-stylesheet type="text/xsl" encoding="UTF-8" href="iform.xsl" version="1.0"?>
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<!DOCTYPE instructionsection PUBLIC "-//ARM//DTD instructionsection //EN" "iform-p.dtd">
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<!-- Copyright (c) 2010-2022 Arm Limited or its affiliates. All rights reserved. -->
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<!-- 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. -->
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<instructionsection id="compact_z_p_z" title="COMPACT" type="instruction">
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<docvars>
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<docvar key="instr-class" value="sve" />
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<docvar key="isa" value="A64" />
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<docvar key="mnemonic" value="COMPACT" />
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</docvars>
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<heading>COMPACT</heading>
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<desc>
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<brief>Shuffle active elements of vector to the right and fill with zero</brief>
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<description>
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<para>Read the active elements from the source vector and pack them into the lowest-numbered elements of the destination vector. Then set any remaining elements of the destination vector to zero.</para>
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<para>This instruction is illegal when executed in Streaming SVE mode, unless FEAT_SME_FA64 is implemented and enabled.</para>
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</description>
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<status>Green</status>
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<predicated>True</predicated>
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<sm_policy>SM_0_only</sm_policy>
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</desc>
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<alias_list howmany="0"></alias_list>
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<classes>
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<iclass name="SVE" oneof="1" id="iclass_sve" no_encodings="1" isa="A64">
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<docvars>
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<docvar key="instr-class" value="sve" />
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<docvar key="isa" value="A64" />
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<docvar key="mnemonic" value="COMPACT" />
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</docvars>
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<iclassintro count="1"></iclassintro>
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<regdiagram form="32" psname="COMPACT-Z.P.Z-_">
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<box hibit="31" width="8" settings="8">
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<c>0</c>
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<c>0</c>
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<c>0</c>
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<c>0</c>
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<c>0</c>
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<c>1</c>
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<c>0</c>
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<c>1</c>
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</box>
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<box hibit="23" width="2" name="size" usename="1">
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<c colspan="2"></c>
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</box>
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<box hibit="21" width="9" settings="9">
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<c>1</c>
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<c>0</c>
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<c>0</c>
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<c>0</c>
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<c>0</c>
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<c>1</c>
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<c>1</c>
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<c>0</c>
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<c>0</c>
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</box>
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<box hibit="12" width="3" name="Pg" usename="1">
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<c colspan="3"></c>
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</box>
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<box hibit="9" width="5" name="Zn" usename="1">
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<c colspan="5"></c>
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</box>
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<box hibit="4" width="5" name="Zd" usename="1">
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<c colspan="5"></c>
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</box>
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</regdiagram>
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<encoding name="compact_z_p_z_" oneofinclass="1" oneof="1" label="">
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<docvars>
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<docvar key="instr-class" value="sve" />
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<docvar key="isa" value="A64" />
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<docvar key="mnemonic" value="COMPACT" />
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</docvars>
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<asmtemplate><text>COMPACT </text><a link="sa_zd" hover="Destination scalable vector register (field "Zd")"><Zd></a><text>.</text><a link="sa_t" hover="Size specifier (field "size<0>") [D,S]"><T></a><text>, </text><a link="sa_pg" hover="Governing scalable predicate register P0-P7 (field "Pg")"><Pg></a><text>, </text><a link="sa_zn" hover="Source scalable vector register (field "Zn")"><Zn></a><text>.</text><a link="sa_t" hover="Size specifier (field "size<0>") [D,S]"><T></a></asmtemplate>
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</encoding>
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<ps_section howmany="1">
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<ps name="COMPACT-Z.P.Z-_" mylink="COMPACT-Z.P.Z-_" enclabels="" sections="1" secttype="noheading">
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<pstext mayhavelinks="1" section="Decode" rep_section="decode">if !<a link="impl-aarch64.HaveSVE.0" file="shared_pseudocode.xml" hover="function: boolean HaveSVE()">HaveSVE</a>() then UNDEFINED;
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if size IN {'0x'} then UNDEFINED;
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constant integer esize = 8 << <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(size);
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integer g = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(Pg);
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integer n = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(Zn);
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integer d = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(Zd);</pstext>
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</ps>
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</ps_section>
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</iclass>
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</classes>
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<explanations scope="all">
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<explanation enclist="compact_z_p_z_" symboldefcount="1">
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<symbol link="sa_zd"><Zd></symbol>
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<account encodedin="Zd">
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<intro>
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<para>Is the name of the destination scalable vector register, encoded in the "Zd" field.</para>
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</intro>
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</account>
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</explanation>
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<explanation enclist="compact_z_p_z_" symboldefcount="1">
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<symbol link="sa_t"><T></symbol>
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<definition encodedin="size<0>">
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<intro>Is the size specifier, </intro>
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<table class="valuetable">
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<tgroup cols="2">
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<thead>
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<row>
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<entry class="bitfield">size<0></entry>
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<entry class="symbol"><T></entry>
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</row>
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</thead>
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<tbody>
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<row>
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<entry class="bitfield">0</entry>
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<entry class="symbol">S</entry>
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</row>
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<row>
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<entry class="bitfield">1</entry>
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<entry class="symbol">D</entry>
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</row>
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</tbody>
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</tgroup>
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</table>
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</definition>
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</explanation>
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<explanation enclist="compact_z_p_z_" symboldefcount="1">
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<symbol link="sa_pg"><Pg></symbol>
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<account encodedin="Pg">
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<intro>
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<para>Is the name of the governing scalable predicate register P0-P7, encoded in the "Pg" field.</para>
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</intro>
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</account>
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</explanation>
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<explanation enclist="compact_z_p_z_" symboldefcount="1">
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<symbol link="sa_zn"><Zn></symbol>
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<account encodedin="Zn">
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<intro>
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<para>Is the name of the source scalable vector register, encoded in the "Zn" field.</para>
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</intro>
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</account>
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</explanation>
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</explanations>
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<ps_section howmany="1">
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<ps name="COMPACT-Z.P.Z-_" mylink="execute" enclabels="" sections="1" secttype="Operation">
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<pstext mayhavelinks="1" section="Execute" rep_section="execute"><a link="impl-aarch64.CheckNonStreamingSVEEnabled.0" file="shared_pseudocode.xml" hover="function: CheckNonStreamingSVEEnabled()">CheckNonStreamingSVEEnabled</a>();
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constant integer VL = <a link="impl-aarch64.CurrentVL.read.none" file="shared_pseudocode.xml" hover="accessor: integer CurrentVL">CurrentVL</a>;
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constant integer PL = VL DIV 8;
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constant integer elements = VL DIV esize;
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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];
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bits(VL) operand1 = 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>[n, VL] else <a link="impl-shared.Zeros.1" file="shared_pseudocode.xml" hover="function: bits(N) Zeros(integer N)">Zeros</a>(VL);
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bits(VL) result = <a link="impl-shared.Zeros.1" file="shared_pseudocode.xml" hover="function: bits(N) Zeros(integer N)">Zeros</a>(VL);
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integer x = 0;
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for e = 0 to elements-1
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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
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bits(esize) element = <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];
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<a link="impl-shared.Elem.write.3" file="shared_pseudocode.xml" hover="accessor: Elem[bits(N) &vector, integer e, integer size] = bits(size) value">Elem</a>[result, x, esize] = element;
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x = x + 1;
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<a link="impl-aarch64.Z.write.2" file="shared_pseudocode.xml" hover="accessor: Z[integer n, integer width] = bits(width) value">Z</a>[d, VL] = result;</pstext>
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</ps>
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</ps_section>
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</instructionsection>
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