mirror of
https://github.com/pound-emu/ballistic.git
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298 lines
16 KiB
XML
298 lines
16 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="prfd_i_p_ai" title="PRFD (vector plus immediate)" 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="PRFD" />
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<docvar key="sve-esize" value="esize-doubleword" />
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</docvars>
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<heading>PRFD (vector plus immediate)</heading>
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<desc>
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<brief>Gather prefetch doublewords (vector plus immediate)</brief>
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<description>
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<para>Gather prefetch of doublewords from the active memory addresses generated by a vector base plus immediate index. The index is a multiple of 8 in the range 0 to 248. Inactive addresses are not prefetched from memory.</para>
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<para>The <syntax><prfop></syntax> symbol specifies the prefetch hint as a combination of three options: access type <value>PLD</value> for load or <value>PST</value> for store; target cache level <value>L1</value>, <value>L2</value> or <value>L3</value>; temporality (<value>KEEP</value> for temporal or <value>STRM</value> for non-temporal).</para>
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<para>This instruction is illegal when executed in Streaming SVE mode, unless FEAT_SME_FA64 is implemented and enabled.</para>
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</description>
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<status>Green</status>
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<predicated>True</predicated>
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<sm_policy>SM_0_only</sm_policy>
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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_32_elem">32-bit element</a>
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<txt> and </txt>
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<a href="#iclass_64_elem">64-bit element</a>
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</classesintro>
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<iclass name="32-bit element" oneof="2" id="iclass_32_elem" 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="PRFD" />
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<docvar key="sve-elem-type" value="32-elem" />
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<docvar key="sve-esize" value="esize-doubleword" />
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</docvars>
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<iclassintro count="1"></iclassintro>
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<regdiagram form="32" psname="PRFD-I.P.AI-S" tworows="1">
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<box hibit="31" width="7" settings="7">
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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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<c>1</c>
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<c>0</c>
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</box>
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<box hibit="24" name="msz<1>" usename="1" settings="1">
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<c>1</c>
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</box>
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<box hibit="23" name="msz<0>" usename="1" settings="1">
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<c>1</c>
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</box>
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<box hibit="22" 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="20" width="5" name="imm5" usename="1">
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<c colspan="5"></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>1</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" settings="1">
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<c>0</c>
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</box>
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<box hibit="3" width="4" name="prfop" 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="prfd_i_p_ai_s" 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="PRFD" />
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<docvar key="sve-elem-type" value="32-elem" />
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<docvar key="sve-esize" value="esize-doubleword" />
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</docvars>
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<asmtemplate><text>PRFD </text><a link="sa_prfop" hover="Prefetch operation specifier (field "prfop") [#uimm4,PLDL1KEEP,PLDL1STRM,PLDL2KEEP,PLDL2STRM,PLDL3KEEP,PLDL3STRM,PSTL1KEEP,PSTL1STRM,PSTL2KEEP,PSTL2STRM,PSTL3KEEP,PSTL3STRM]"><prfop></a><text>, </text><a link="sa_pg" hover="Governing scalable predicate register P0-P7 (field "Pg")"><Pg></a><text>, [</text><a link="sa_zn" hover="Base scalable vector register (field "Zn")"><Zn></a><text>.S</text><text>{</text><text>, #</text><a link="sa_imm" hover="Optional unsigned immediate byte offset, multiple of 8 [0-248], default 0 (field "imm5")"><imm></a><text>}</text><text>]</text></asmtemplate>
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</encoding>
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<ps_section howmany="1">
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<ps name="PRFD-I.P.AI-S" mylink="PRFD-I.P.AI-S" 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>() then UNDEFINED;
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constant integer esize = 32;
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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 level = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(prfop<2:1>);
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boolean stream = (prfop<0> == '1');
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pref_hint = if prfop<3> == '0' then <a link="Prefetch_READ" file="shared_pseudocode.xml" hover="enumeration PrefetchHint {Prefetch_READ, Prefetch_WRITE, Prefetch_EXEC}">Prefetch_READ</a> else <a link="Prefetch_WRITE" file="shared_pseudocode.xml" hover="enumeration PrefetchHint {Prefetch_READ, Prefetch_WRITE, Prefetch_EXEC}">Prefetch_WRITE</a>;
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integer scale = 3;
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integer offset = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(imm5);</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 element" oneof="2" id="iclass_64_elem" 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="PRFD" />
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<docvar key="sve-elem-type" value="64-elem" />
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<docvar key="sve-esize" value="esize-doubleword" />
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</docvars>
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<iclassintro count="1"></iclassintro>
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<regdiagram form="32" psname="PRFD-I.P.AI-D" tworows="1">
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<box hibit="31" width="7" settings="7">
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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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<c>1</c>
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<c>0</c>
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</box>
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<box hibit="24" name="msz<1>" usename="1" settings="1">
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<c>1</c>
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</box>
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<box hibit="23" name="msz<0>" usename="1" settings="1">
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<c>1</c>
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</box>
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<box hibit="22" 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="20" width="5" name="imm5" usename="1">
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<c colspan="5"></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>1</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" settings="1">
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<c>0</c>
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</box>
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<box hibit="3" width="4" name="prfop" 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="prfd_i_p_ai_d" 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="PRFD" />
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<docvar key="sve-elem-type" value="64-elem" />
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<docvar key="sve-esize" value="esize-doubleword" />
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</docvars>
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<asmtemplate><text>PRFD </text><a link="sa_prfop" hover="Prefetch operation specifier (field "prfop") [#uimm4,PLDL1KEEP,PLDL1STRM,PLDL2KEEP,PLDL2STRM,PLDL3KEEP,PLDL3STRM,PSTL1KEEP,PSTL1STRM,PSTL2KEEP,PSTL2STRM,PSTL3KEEP,PSTL3STRM]"><prfop></a><text>, </text><a link="sa_pg" hover="Governing scalable predicate register P0-P7 (field "Pg")"><Pg></a><text>, [</text><a link="sa_zn" hover="Base scalable vector register (field "Zn")"><Zn></a><text>.D</text><text>{</text><text>, #</text><a link="sa_imm" hover="Optional unsigned immediate byte offset, multiple of 8 [0-248], default 0 (field "imm5")"><imm></a><text>}</text><text>]</text></asmtemplate>
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</encoding>
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<ps_section howmany="1">
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<ps name="PRFD-I.P.AI-D" mylink="PRFD-I.P.AI-D" 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>() then UNDEFINED;
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constant integer esize = 64;
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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 level = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(prfop<2:1>);
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boolean stream = (prfop<0> == '1');
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pref_hint = if prfop<3> == '0' then <a link="Prefetch_READ" file="shared_pseudocode.xml" hover="enumeration PrefetchHint {Prefetch_READ, Prefetch_WRITE, Prefetch_EXEC}">Prefetch_READ</a> else <a link="Prefetch_WRITE" file="shared_pseudocode.xml" hover="enumeration PrefetchHint {Prefetch_READ, Prefetch_WRITE, Prefetch_EXEC}">Prefetch_WRITE</a>;
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integer scale = 3;
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integer offset = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(imm5);</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="prfd_i_p_ai_d, prfd_i_p_ai_s" symboldefcount="1">
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<symbol link="sa_prfop"><prfop></symbol>
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<definition encodedin="prfop">
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<intro>Is the prefetch operation 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">prfop</entry>
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<entry class="symbol"><prfop></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">0000</entry>
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<entry class="symbol">PLDL1KEEP</entry>
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</row>
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<row>
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<entry class="bitfield">0001</entry>
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<entry class="symbol">PLDL1STRM</entry>
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</row>
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<row>
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<entry class="bitfield">0010</entry>
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<entry class="symbol">PLDL2KEEP</entry>
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</row>
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<row>
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<entry class="bitfield">0011</entry>
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<entry class="symbol">PLDL2STRM</entry>
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</row>
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<row>
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<entry class="bitfield">0100</entry>
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<entry class="symbol">PLDL3KEEP</entry>
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</row>
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<row>
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<entry class="bitfield">0101</entry>
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<entry class="symbol">PLDL3STRM</entry>
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</row>
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<row>
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<entry class="bitfield">x11x</entry>
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<entry class="symbol">#uimm4</entry>
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</row>
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<row>
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<entry class="bitfield">1000</entry>
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<entry class="symbol">PSTL1KEEP</entry>
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</row>
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<row>
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<entry class="bitfield">1001</entry>
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<entry class="symbol">PSTL1STRM</entry>
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</row>
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<row>
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<entry class="bitfield">1010</entry>
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<entry class="symbol">PSTL2KEEP</entry>
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</row>
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<row>
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<entry class="bitfield">1011</entry>
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<entry class="symbol">PSTL2STRM</entry>
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</row>
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<row>
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<entry class="bitfield">1100</entry>
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<entry class="symbol">PSTL3KEEP</entry>
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</row>
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<row>
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<entry class="bitfield">1101</entry>
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<entry class="symbol">PSTL3STRM</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="prfd_i_p_ai_d, prfd_i_p_ai_s" 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="prfd_i_p_ai_d, prfd_i_p_ai_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 base 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="prfd_i_p_ai_d, prfd_i_p_ai_s" symboldefcount="1">
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<symbol link="sa_imm"><imm></symbol>
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<account encodedin="imm5">
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<intro>
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<para>Is the optional unsigned immediate byte offset, a multiple of 8 in the range 0 to 248, defaulting to 0, encoded in the "imm5" 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="PRFD-I.P.AI-S" mylink="execute" enclabels="" sections="1" secttype="Operation">
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<pstext mayhavelinks="1" section="Execute" rep_section="execute"><a link="impl-aarch64.CheckNonStreamingSVEEnabled.0" file="shared_pseudocode.xml" hover="function: CheckNonStreamingSVEEnabled()">CheckNonStreamingSVEEnabled</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) base;
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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
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base = <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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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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bits(64) addr = <a link="impl-shared.ZeroExtend.2" file="shared_pseudocode.xml" hover="function: bits(N) ZeroExtend(bits(M) x, integer N)">ZeroExtend</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>[base, e, esize], 64) + (offset << scale);
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<a link="impl-shared.Hint_Prefetch.4" file="shared_pseudocode.xml" hover="function: Hint_Prefetch(bits(64) address, PrefetchHint hint, integer target, boolean stream)">Hint_Prefetch</a>(addr, pref_hint, level, stream);</pstext>
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</ps>
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</ps_section>
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</instructionsection>
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