mirror of
https://github.com/pound-emu/ballistic.git
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137 lines
6.1 KiB
XML
137 lines
6.1 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="ptest_p_p" title="PTEST" 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="PTEST" />
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</docvars>
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<heading>PTEST</heading>
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<desc>
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<brief>Set condition flags for predicate</brief>
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<description>
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<para>Sets the <arm-defined-word>First</arm-defined-word> (N), <arm-defined-word>None</arm-defined-word> (Z), <arm-defined-word>!Last</arm-defined-word> (C) condition flags based on the predicate source register, and the V flag to zero.</para>
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</description>
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<status>Green</status>
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<predicated>True</predicated>
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<uses_dit condition="FEAT_SVE2 is implemented or FEAT_SME is implemented">True</uses_dit>
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<affected_by_sme output="predicate register" />
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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="PTEST" />
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</docvars>
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<iclassintro count="1"></iclassintro>
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<regdiagram form="32" psname="PTEST-.P.P-_" tworows="1">
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<box hibit="31" width="2" settings="2">
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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="29" width="6" settings="6">
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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>0</c>
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<c>1</c>
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</box>
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<box hibit="23" name="op" settings="1">
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<c>0</c>
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</box>
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<box hibit="22" name="S" usename="1" settings="1">
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<c>1</c>
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</box>
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<box hibit="21" width="2" settings="2">
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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="19" width="6" settings="6">
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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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</box>
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<box hibit="13" width="4" name="Pg" usename="1">
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<c colspan="4"></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" name="opc2<3>" settings="1">
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<c>0</c>
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</box>
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<box hibit="2" name="opc2<2>" settings="1">
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<c>0</c>
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</box>
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<box hibit="1" name="opc2<1>" settings="1">
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<c>0</c>
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</box>
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<box hibit="0" name="opc2<0>" settings="1">
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<c>0</c>
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</box>
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</regdiagram>
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<encoding name="ptest_p_p_" 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="PTEST" />
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</docvars>
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<asmtemplate><text>PTEST </text><a link="sa_pg" hover="Governing scalable predicate register (field "Pg")"><Pg></a><text>, </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="PTEST-.P.P-_" mylink="PTEST-.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 = 8;
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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>(Pn);</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="ptest_p_p_" 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, 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="ptest_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="PTEST-.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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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(PL) result = <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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PSTATE.<N,Z,C,V> = <a link="impl-aarch64.PredTest.3" file="shared_pseudocode.xml" hover="function: bits(4) PredTest(bits(N) mask, bits(N) result, integer esize)">PredTest</a>(mask, result, esize);</pstext>
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</ps>
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</ps_section>
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</instructionsection>
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