mirror of
https://github.com/pound-emu/ballistic.git
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205 lines
9.2 KiB
XML
205 lines
9.2 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="punpkhi_p_p" title="PUNPKHI, PUNPKLO" 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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</docvars>
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<heading>PUNPKHI, PUNPKLO</heading>
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<desc>
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<brief>Unpack and widen half of predicate</brief>
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<description>
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<para>Unpack elements from the lowest or highest half of the source predicate and place in elements of twice their size within the destination predicate. This instruction is unpredicated.</para>
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</description>
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<status>Green</status>
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<predicated>False</predicated>
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<uses_dit condition="FEAT_SVE2 is implemented or FEAT_SME is implemented">True</uses_dit>
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</desc>
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<alias_list howmany="0"></alias_list>
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<classes>
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<classesintro count="2">
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<txt>It has encodings from 2 classes:</txt>
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<a href="#iclass_sve_high_half">High half</a>
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<txt> and </txt>
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<a href="#iclass_sve_low_half">Low half</a>
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</classesintro>
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<iclass name="High half" oneof="2" id="iclass_sve_high_half" 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="PUNPKHI" />
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<docvar key="sve-half" value="sve-high-half" />
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</docvars>
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<iclassintro count="1"></iclassintro>
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<regdiagram form="32" psname="PUNPKHI-P.P-_" tworows="1">
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<box hibit="31" width="15" settings="15">
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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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<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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<c>0</c>
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</box>
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<box hibit="16" name="H" usename="1" settings="1">
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<c>1</c>
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</box>
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<box hibit="15" width="6" settings="6">
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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>0</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="9" settings="1">
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<c>0</c>
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</box>
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<box hibit="8" width="4" name="Pn" usename="1">
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<c colspan="4"></c>
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</box>
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<box hibit="4" settings="1">
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<c>0</c>
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</box>
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<box hibit="3" width="4" name="Pd" usename="1">
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<c colspan="4"></c>
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</box>
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</regdiagram>
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<encoding name="punpkhi_p_p_" oneofinclass="1" oneof="2" 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="PUNPKHI" />
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<docvar key="sve-half" value="sve-high-half" />
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</docvars>
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<asmtemplate><text>PUNPKHI </text><a link="sa_pd" hover="Destination scalable predicate register (field "Pd")"><Pd></a><text>.H, </text><a link="sa_pn" hover="Source scalable predicate register (field "Pn")"><Pn></a><text>.B</text></asmtemplate>
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</encoding>
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<ps_section howmany="1">
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<ps name="PUNPKHI-P.P-_" mylink="PUNPKHI-P.P-_" 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>() && !<a link="impl-aarch64.HaveSME.0" file="shared_pseudocode.xml" hover="function: boolean HaveSME()">HaveSME</a>() then UNDEFINED;
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constant integer esize = 16;
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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>(Pn);
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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>(Pd);
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boolean hi = TRUE;</pstext>
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</ps>
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</ps_section>
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</iclass>
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<iclass name="Low half" oneof="2" id="iclass_sve_low_half" 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="PUNPKLO" />
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<docvar key="sve-half" value="sve-low-half" />
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</docvars>
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<iclassintro count="1"></iclassintro>
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<regdiagram form="32" psname="PUNPKLO-P.P-_" tworows="1">
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<box hibit="31" width="15" settings="15">
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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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<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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<c>0</c>
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</box>
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<box hibit="16" name="H" usename="1" settings="1">
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<c>0</c>
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</box>
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<box hibit="15" width="6" settings="6">
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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>0</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="9" settings="1">
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<c>0</c>
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</box>
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<box hibit="8" width="4" name="Pn" usename="1">
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<c colspan="4"></c>
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</box>
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<box hibit="4" settings="1">
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<c>0</c>
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</box>
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<box hibit="3" width="4" name="Pd" usename="1">
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<c colspan="4"></c>
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</box>
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</regdiagram>
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<encoding name="punpklo_p_p_" oneofinclass="1" oneof="2" 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="PUNPKLO" />
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<docvar key="sve-half" value="sve-low-half" />
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</docvars>
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<asmtemplate><text>PUNPKLO </text><a link="sa_pd" hover="Destination scalable predicate register (field "Pd")"><Pd></a><text>.H, </text><a link="sa_pn" hover="Source scalable predicate register (field "Pn")"><Pn></a><text>.B</text></asmtemplate>
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</encoding>
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<ps_section howmany="1">
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<ps name="PUNPKLO-P.P-_" mylink="PUNPKLO-P.P-_" 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>() && !<a link="impl-aarch64.HaveSME.0" file="shared_pseudocode.xml" hover="function: boolean HaveSME()">HaveSME</a>() then UNDEFINED;
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constant integer esize = 16;
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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>(Pn);
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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>(Pd);
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boolean hi = FALSE;</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="punpkhi_p_p_, punpklo_p_p_" symboldefcount="1">
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<symbol link="sa_pd"><Pd></symbol>
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<account encodedin="Pd">
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<intro>
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<para>Is the name of the destination scalable predicate register, encoded in the "Pd" field.</para>
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</intro>
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</account>
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</explanation>
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<explanation enclist="punpkhi_p_p_, punpklo_p_p_" symboldefcount="1">
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<symbol link="sa_pn"><Pn></symbol>
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<account encodedin="Pn">
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<intro>
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<para>Is the name of the source scalable predicate register, encoded in the "Pn" 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="PUNPKHI-P.P-_" mylink="execute" enclabels="" sections="1" secttype="Operation">
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<pstext mayhavelinks="1" section="Execute" rep_section="execute"><a link="impl-aarch64.CheckSVEEnabled.0" file="shared_pseudocode.xml" hover="function: CheckSVEEnabled()">CheckSVEEnabled</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) operand = <a link="impl-aarch64.P.read.2" file="shared_pseudocode.xml" hover="accessor: bits(width) P[integer n, integer width]">P</a>[n, PL];
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bits(PL) result;
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constant integer psize = esize DIV 8;
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for e = 0 to elements-1
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bit pbit = <a link="impl-aarch64.PredicateElement.3" file="shared_pseudocode.xml" hover="function: bit PredicateElement(bits(N) pred, integer e, integer esize)">PredicateElement</a>(operand, if hi then e + elements else e, esize DIV 2);
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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, e, psize] = <a link="impl-shared.ZeroExtend.2" file="shared_pseudocode.xml" hover="function: bits(N) ZeroExtend(bits(M) x, integer N)">ZeroExtend</a>(pbit, psize);
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<a link="impl-aarch64.P.write.2" file="shared_pseudocode.xml" hover="accessor: P[integer n, integer width] = bits(width) value">P</a>[d, PL] = result;</pstext>
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</ps>
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</ps_section>
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</instructionsection>
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