mirror of
https://github.com/pound-emu/ballistic.git
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271 lines
15 KiB
XML
271 lines
15 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="sqdmlalb_z_zzzi" title="SQDMLALB (indexed)" 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="SQDMLALB" />
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</docvars>
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<heading>SQDMLALB (indexed)</heading>
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<desc>
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<brief>Signed saturating doubling multiply-add long to accumulator (bottom, indexed)</brief>
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<description>
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<para>Multiply then double the even-numbered signed elements within each 128-bit segment of the first source vector and specified signed element in the corresponding second source vector segment. Each intermediate value is saturated to the double-width N-bit value's signed integer range -2<sup>(N-1) </sup> to (2<sup>(N-1) </sup>)-1. Then destructively add to the overlapping double-width elements of the addend and destination vector. Each destination element is saturated to the double-width N-bit element's signed integer range -2<sup>(N-1) </sup> to (2<sup>(N-1) </sup>)-1.</para>
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<para>The elements within the second source vector are specified using an immediate index which selects the same element position within each 128-bit vector segment. The index range is from 0 to one less than the number of elements per 128-bit segment, encoded in 2 or 3 bits depending on the size of the element.</para>
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</description>
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<status>Green</status>
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<predicated>False</predicated>
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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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<classesintro count="2">
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<txt>It has encodings from 2 classes:</txt>
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<a href="#iclass_of_words">32-bit</a>
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<txt> and </txt>
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<a href="#iclass_of_doublewords">64-bit</a>
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</classesintro>
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<iclass name="32-bit" oneof="2" id="iclass_of_words" no_encodings="1" isa="A64">
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<docvars>
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<docvar key="as-structure-org" value="of-words" />
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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="SQDMLALB" />
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</docvars>
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<iclassintro count="1"></iclassintro>
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<regdiagram form="32" psname="SQDMLALB-Z.ZZZi-S" 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" name="size<1>" usename="1" settings="1">
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<c>1</c>
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</box>
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<box hibit="22" name="size<0>" usename="1" settings="1">
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<c>0</c>
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</box>
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<box hibit="21" settings="1">
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<c>1</c>
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</box>
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<box hibit="20" width="2" name="i3h" usename="1">
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<c colspan="2"></c>
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</box>
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<box hibit="18" width="3" name="Zm" usename="1">
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<c colspan="3"></c>
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</box>
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<box hibit="15" width="3" settings="3">
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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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</box>
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<box hibit="12" name="S" usename="1" settings="1">
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<c>0</c>
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</box>
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<box hibit="11" name="i3l" usename="1">
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<c></c>
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</box>
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<box hibit="10" name="T" 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="sqdmlalb_z_zzzi_s" oneofinclass="1" oneof="2" label="">
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<docvars>
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<docvar key="as-structure-org" value="of-words" />
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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="SQDMLALB" />
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</docvars>
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<asmtemplate><text>SQDMLALB </text><a link="sa_zda" hover="Third source and destination scalable vector register (field "Zda")"><Zda></a><text>.S, </text><a link="sa_zn" hover="First source scalable vector register (field "Zn")"><Zn></a><text>.H, </text><a link="sa_zm_1" hover="Second source scalable vector register Z0-Z7 (field "Zm")"><Zm></a><text>.H[</text><a link="sa_imm_1" hover="Element index [0-7] (field "i3h:i3l")"><imm></a><text>]</text></asmtemplate>
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</encoding>
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<ps_section howmany="1">
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<ps name="SQDMLALB-Z.ZZZi-S" mylink="SQDMLALB-Z.ZZZi-S" 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 = 16;
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integer index = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(i3h:i3l);
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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);
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integer sel = 0;</pstext>
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</ps>
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</ps_section>
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</iclass>
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<iclass name="64-bit" oneof="2" id="iclass_of_doublewords" no_encodings="1" isa="A64">
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<docvars>
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<docvar key="as-structure-org" value="of-doublewords" />
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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="SQDMLALB" />
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</docvars>
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<iclassintro count="1"></iclassintro>
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<regdiagram form="32" psname="SQDMLALB-Z.ZZZi-D" 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" name="size<1>" usename="1" settings="1">
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<c>1</c>
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</box>
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<box hibit="22" name="size<0>" usename="1" settings="1">
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<c>1</c>
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</box>
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<box hibit="21" settings="1">
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<c>1</c>
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</box>
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<box hibit="20" name="i2h" usename="1">
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<c></c>
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</box>
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<box hibit="19" width="4" name="Zm" usename="1">
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<c colspan="4"></c>
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</box>
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<box hibit="15" width="3" settings="3">
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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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</box>
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<box hibit="12" name="S" usename="1" settings="1">
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<c>0</c>
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</box>
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<box hibit="11" name="i2l" usename="1">
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<c></c>
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</box>
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<box hibit="10" name="T" 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="sqdmlalb_z_zzzi_d" oneofinclass="1" oneof="2" label="">
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<docvars>
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<docvar key="as-structure-org" value="of-doublewords" />
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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="SQDMLALB" />
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</docvars>
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<asmtemplate><text>SQDMLALB </text><a link="sa_zda" hover="Third source and destination scalable vector register (field "Zda")"><Zda></a><text>.D, </text><a link="sa_zn" hover="First source scalable vector register (field "Zn")"><Zn></a><text>.S, </text><a link="sa_zm" hover="Second source scalable vector register Z0-Z15 (field "Zm")"><Zm></a><text>.S[</text><a link="sa_imm" hover="Element index [0-3] (field "i2h:i2l")"><imm></a><text>]</text></asmtemplate>
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</encoding>
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<ps_section howmany="1">
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<ps name="SQDMLALB-Z.ZZZi-D" mylink="SQDMLALB-Z.ZZZi-D" 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 = 32;
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integer index = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(i2h:i2l);
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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);
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integer sel = 0;</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="sqdmlalb_z_zzzi_d, sqdmlalb_z_zzzi_s" 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="sqdmlalb_z_zzzi_d, sqdmlalb_z_zzzi_s" 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="sqdmlalb_z_zzzi_s" symboldefcount="1">
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<symbol link="sa_zm_1"><Zm></symbol>
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<account encodedin="Zm">
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<docvars>
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<docvar key="as-structure-org" value="of-words" />
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</docvars>
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<intro>
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<para>For the 32-bit variant: is the name of the second source scalable vector register Z0-Z7, 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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<explanation enclist="sqdmlalb_z_zzzi_d" symboldefcount="2">
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<symbol link="sa_zm"><Zm></symbol>
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<account encodedin="Zm">
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<docvars>
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<docvar key="as-structure-org" value="of-doublewords" />
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</docvars>
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<intro>
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<para>For the 64-bit variant: is the name of the second source scalable vector register Z0-Z15, 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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<explanation enclist="sqdmlalb_z_zzzi_s" symboldefcount="1">
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<symbol link="sa_imm_1"><imm></symbol>
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<account encodedin="i3h:i3l">
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<docvars>
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<docvar key="as-structure-org" value="of-words" />
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</docvars>
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<intro>
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<para>For the 32-bit variant: is the element index, in the range 0 to 7, encoded in the "i3h:i3l" fields.</para>
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</intro>
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</account>
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</explanation>
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<explanation enclist="sqdmlalb_z_zzzi_d" symboldefcount="2">
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<symbol link="sa_imm"><imm></symbol>
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<account encodedin="i2h:i2l">
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<docvars>
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<docvar key="as-structure-org" value="of-doublewords" />
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</docvars>
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<intro>
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<para>For the 64-bit variant: is the element index, in the range 0 to 3, encoded in the "i2h:i2l" fields.</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="SQDMLALB-Z.ZZZi-S" 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 (2 * esize);
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constant integer eltspersegment = 128 DIV (2 * 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) result = <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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for e = 0 to elements-1
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integer s = e - (e MOD eltspersegment);
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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, 2 * e + sel, 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, 2 * s + index, 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>[result, e, 2*esize]);
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integer product = <a link="impl-shared.SInt.1" file="shared_pseudocode.xml" hover="function: integer SInt(bits(N) x)">SInt</a>(<a link="impl-aarch32.SignedSat.2" file="shared_pseudocode.xml" hover="function: bits(N) SignedSat(integer i, integer N)">SignedSat</a>(2 * element1 * element2, 2*esize));
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integer res = element3 + product;
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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, 2*esize] = <a link="impl-aarch32.SignedSat.2" file="shared_pseudocode.xml" hover="function: bits(N) SignedSat(integer i, integer N)">SignedSat</a>(res, 2*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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