mirror of
https://github.com/pound-emu/ballistic.git
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171 lines
9.5 KiB
XML
171 lines
9.5 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="sqrdmlah_z_zzz" title="SQRDMLAH (vectors)" 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="SQRDMLAH" />
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</docvars>
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<heading>SQRDMLAH (vectors)</heading>
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<desc>
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<brief>Signed saturating rounding doubling multiply-add high to accumulator (unpredicated)</brief>
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<description>
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<para>Multiply then double the corresponding signed elements of the first and second source vectors, and destructively add the rounded high half of each result to the corresponding elements of the addend and destination vector. Each destination element is saturated to the N-bit element's signed integer range -2<sup>(N-1) </sup> to (2<sup>(N-1) </sup>)-1. 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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<takes_movprfx>True</takes_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="SQRDMLAH" />
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</docvars>
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<iclassintro count="1"></iclassintro>
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<regdiagram form="32" psname="SQRDMLAH-Z.ZZZ-_" 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" settings="1">
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<c>0</c>
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</box>
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<box hibit="20" width="5" name="Zm" usename="1">
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<c colspan="5"></c>
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</box>
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<box hibit="15" width="5" settings="5">
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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>1</c>
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<c>0</c>
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</box>
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<box hibit="10" name="S" usename="1" settings="1">
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<c>0</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="Zda" 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="sqrdmlah_z_zzz_" 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="SQRDMLAH" />
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</docvars>
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<asmtemplate><text>SQRDMLAH </text><a link="sa_zda" hover="Third source and destination scalable vector register (field "Zda")"><Zda></a><text>.</text><a link="sa_t" hover="Size specifier (field "size") [B,D,H,S]"><T></a><text>, </text><a link="sa_zn" hover="First 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><text>, </text><a link="sa_zm" hover="Second source scalable vector register (field "Zm")"><Zm></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="SQRDMLAH-Z.ZZZ-_" mylink="SQRDMLAH-Z.ZZZ-_" 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 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 m = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(Zm);
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integer da = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(Zda);</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="sqrdmlah_z_zzz_" symboldefcount="1">
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<symbol link="sa_zda"><Zda></symbol>
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<account encodedin="Zda">
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<intro>
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<para>Is the name of the third source and destination scalable vector register, encoded in the "Zda" field.</para>
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</intro>
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</account>
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</explanation>
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<explanation enclist="sqrdmlah_z_zzz_" 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="sqrdmlah_z_zzz_" 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 first 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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<explanation enclist="sqrdmlah_z_zzz_" symboldefcount="1">
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<symbol link="sa_zm"><Zm></symbol>
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<account encodedin="Zm">
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<intro>
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<para>Is the name of the second source scalable vector register, encoded in the "Zm" 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="SQRDMLAH-Z.ZZZ-_" 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 elements = VL DIV esize;
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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>[n, VL];
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bits(VL) operand2 = <a link="impl-aarch64.Z.read.2" file="shared_pseudocode.xml" hover="accessor: bits(width) Z[integer n, integer width]">Z</a>[m, VL];
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bits(VL) operand3 = <a link="impl-aarch64.Z.read.2" file="shared_pseudocode.xml" hover="accessor: bits(width) Z[integer n, integer width]">Z</a>[da, VL];
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bits(VL) result;
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constant integer round_const = 1 << (esize - 1);
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for e = 0 to elements-1
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integer element1 = <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>[operand1, e, esize]);
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integer element2 = <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>[operand2, e, esize]);
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integer element3 = <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>[operand3, e, esize]);
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integer res = (element3 << esize) + (2 * element1 * element2);
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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>((res + round_const) >> esize, 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>[da, VL] = result;</pstext>
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</ps>
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</ps_section>
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</instructionsection>
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