mirror of
https://github.com/pound-emu/ballistic.git
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177 lines
9.2 KiB
XML
177 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="sqneg_z_p_z" title="SQNEG" type="instruction">
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<docvars>
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<docvar key="instr-class" value="sve2" />
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<docvar key="isa" value="A64" />
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<docvar key="mnemonic" value="SQNEG" />
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</docvars>
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<heading>SQNEG</heading>
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<desc>
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<brief>Signed saturating negate</brief>
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<description>
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<para>Negate the signed integer value in each active element of the source vector, and place the results in the corresponding elements of the destination vector. Each result element is saturated to the N-bit element's signed integer range -2<sup>(N-1) </sup> to (2<sup>(N-1) </sup>)-1. Inactive elements in the destination vector register remain unmodified.</para>
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</description>
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<status>Green</status>
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<predicated>True</predicated>
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<takes_movprfx>True</takes_movprfx>
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<takes_pred_movprfx>True</takes_pred_movprfx>
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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="SVE2" oneof="1" id="iclass_sve2" no_encodings="1" isa="A64">
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<docvars>
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<docvar key="instr-class" value="sve2" />
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<docvar key="isa" value="A64" />
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<docvar key="mnemonic" value="SQNEG" />
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</docvars>
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<iclassintro count="1"></iclassintro>
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<regdiagram form="32" psname="SQNEG-Z.P.Z-_" tworows="1">
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<box hibit="31" width="8" settings="8">
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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>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="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="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="19" name="Q" usename="1" settings="1">
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<c>1</c>
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</box>
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<box hibit="18" settings="1">
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<c>0</c>
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</box>
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<box hibit="17" name="opc<1>" settings="1">
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<c>0</c>
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</box>
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<box hibit="16" name="opc<0>" settings="1">
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<c>1</c>
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</box>
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<box hibit="15" width="3" settings="3">
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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="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="sqneg_z_p_z_" oneofinclass="1" oneof="1" label="">
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<docvars>
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<docvar key="instr-class" value="sve2" />
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<docvar key="isa" value="A64" />
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<docvar key="mnemonic" value="SQNEG" />
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</docvars>
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<asmtemplate><text>SQNEG </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") [B,D,H,S]"><T></a><text>, </text><a link="sa_pg" hover="Governing scalable predicate register P0-P7 (field "Pg")"><Pg></a><text>/M, </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") [B,D,H,S]"><T></a></asmtemplate>
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</encoding>
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<ps_section howmany="1">
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<ps name="SQNEG-Z.P.Z-_" mylink="SQNEG-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.HaveSVE2.0" file="shared_pseudocode.xml" hover="function: boolean HaveSVE2()">HaveSVE2</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 << <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="sqneg_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="sqneg_z_p_z_" symboldefcount="1">
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<symbol link="sa_t"><T></symbol>
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<definition encodedin="size">
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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</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">00</entry>
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<entry class="symbol">B</entry>
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</row>
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<row>
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<entry class="bitfield">01</entry>
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<entry class="symbol">H</entry>
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</row>
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<row>
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<entry class="bitfield">10</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">11</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="sqneg_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="sqneg_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="SQNEG-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.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) 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) operand = 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-aarch64.Z.read.2" file="shared_pseudocode.xml" hover="accessor: bits(width) Z[integer n, integer width]">Z</a>[d, VL];
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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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integer element = <a link="impl-shared.SInt.1" file="shared_pseudocode.xml" hover="function: integer SInt(bits(N) x)">SInt</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>[operand, e, esize]);
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element = -element;
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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, esize] = <a link="impl-aarch32.SignedSat.2" file="shared_pseudocode.xml" hover="function: bits(N) SignedSat(integer i, integer N)">SignedSat</a>(element, esize);
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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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