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319 lines
24 KiB
XML
319 lines
24 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="LDAPR" title="LDAPR -- A64" type="instruction">
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<docvars>
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<docvar key="instr-class" value="general" />
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<docvar key="isa" value="A64" />
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<docvar key="mnemonic" value="LDAPR" />
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</docvars>
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<heading>LDAPR</heading>
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<desc>
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<brief>
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<para>Load-Acquire RCpc Register</para>
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</brief>
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<authored>
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<para>Load-Acquire RCpc Register derives an address from a base register value, loads a 32-bit word or 64-bit doubleword from the derived address in memory, and writes it to a register.</para>
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<para>The instruction has memory ordering semantics as described in <xref linkend="BEIHCHEF">Load-Acquire, Load-AcquirePC, and Store-Release</xref>, except that:</para>
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<list type="unordered">
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<listitem><content>There is no ordering requirement, separate from the requirements of a Load-AcquirePC or a Store-Release, created by having a Store-Release followed by a Load-AcquirePC instruction.</content></listitem>
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<listitem><content>The reading of a value written by a Store-Release by a Load-AcquirePC instruction by the same observer does not make the write of the Store-Release globally observed.</content></listitem>
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</list>
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<para>This difference in memory ordering is not described in the pseudocode.</para>
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<para>For information about memory accesses, see <xref linkend="CHDIIIBB">Load/Store addressing modes</xref>.</para>
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</authored>
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</desc>
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<operationalnotes>
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<para>If PSTATE.DIT is 1, the timing of this instruction is insensitive to the value of the data being loaded or stored.</para>
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</operationalnotes>
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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_base_register">No offset</a>
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<txt> and </txt>
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<a href="#iclass_post_indexed">Post-index</a>
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</classesintro>
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<iclass name="No offset" oneof="2" id="iclass_base_register" no_encodings="2" isa="A64">
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<docvars>
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<docvar key="address-form" value="base-register" />
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<docvar key="instr-class" value="general" />
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<docvar key="isa" value="A64" />
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<docvar key="mnemonic" value="LDAPR" />
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</docvars>
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<iclassintro count="2"></iclassintro>
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<arch_variants>
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<arch_variant name="ARMv8.3" feature="FEAT_LRCPC" />
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</arch_variants>
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<regdiagram form="32" psname="aarch64/instrs/memory/ordered-rcpc" tworows="1">
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<box hibit="31" width="2" name="size" usename="1" settings="1" psbits="xx">
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<c>1</c>
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<c>x</c>
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</box>
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<box hibit="29" 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="26" name="V" settings="1">
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<c>0</c>
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</box>
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<box hibit="25" 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="23" name="A" settings="1">
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<c>1</c>
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</box>
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<box hibit="22" name="R" 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="5" name="Rs" usename="1" settings="5" psbits="xxxxx">
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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>(1)</c>
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<c>(1)</c>
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</box>
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<box hibit="15" name="o3" settings="1">
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<c>1</c>
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</box>
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<box hibit="14" width="3" name="opc" settings="3">
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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="11" 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="9" width="5" name="Rn" 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="Rt" 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="LDAPR_32L_memop" oneofinclass="2" oneof="4" label="32-bit" bitdiffs="size == 10">
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<docvars>
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<docvar key="address-form" value="base-register" />
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<docvar key="address-form-reg-type" value="base-register-32-reg" />
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<docvar key="atomic-ops" value="LDAPR-32-reg" />
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<docvar key="instr-class" value="general" />
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<docvar key="isa" value="A64" />
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<docvar key="mnemonic" value="LDAPR" />
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<docvar key="reg-type" value="32-reg" />
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</docvars>
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<box hibit="31" width="2" name="size">
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<c></c>
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<c>0</c>
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</box>
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<asmtemplate><text>LDAPR </text><a link="sa_wt" hover="32-bit general-purpose register to be loaded (field "Rt")"><Wt></a><text>, [</text><a link="sa_xn_sp" hover="64-bit general-purpose base register or SP (field "Rn")"><Xn|SP></a><text> {,#0}</text><text>]</text></asmtemplate>
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</encoding>
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<encoding name="LDAPR_64L_memop" oneofinclass="2" oneof="4" label="64-bit" bitdiffs="size == 11">
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<docvars>
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<docvar key="address-form" value="base-register" />
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<docvar key="address-form-reg-type" value="base-register-64-reg" />
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<docvar key="atomic-ops" value="LDAPR-64-reg" />
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<docvar key="instr-class" value="general" />
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<docvar key="isa" value="A64" />
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<docvar key="mnemonic" value="LDAPR" />
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<docvar key="reg-type" value="64-reg" />
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</docvars>
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<box hibit="31" width="2" name="size">
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<c></c>
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<c>1</c>
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</box>
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<asmtemplate><text>LDAPR </text><a link="sa_xt" hover="64-bit general-purpose register to be loaded (field "Rt")"><Xt></a><text>, [</text><a link="sa_xn_sp" hover="64-bit general-purpose base register or SP (field "Rn")"><Xn|SP></a><text> {,#0}</text><text>]</text></asmtemplate>
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</encoding>
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<ps_section howmany="1">
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<ps name="aarch64/instrs/memory/ordered-rcpc" mylink="aarch64.instrs.memory.ordered-rcpc" enclabels="" sections="1" secttype="noheading">
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<pstext mayhavelinks="1" section="Decode" rep_section="decode">boolean wback = FALSE;
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integer offset = 0;
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boolean wb_unknown = FALSE;
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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>(Rn);
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integer t = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(Rt);
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integer s = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(Rs); // ignored by all loads and store-release
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integer elsize = 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 regsize = if elsize == 64 then 64 else 32;
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integer datasize = elsize;
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boolean tagchecked = n != 31;</pstext>
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</ps>
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</ps_section>
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</iclass>
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<iclass name="Post-index" oneof="2" id="iclass_post_indexed" no_encodings="2" isa="A64">
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<docvars>
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<docvar key="address-form" value="post-indexed" />
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<docvar key="instr-class" value="general" />
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<docvar key="isa" value="A64" />
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<docvar key="mnemonic" value="LDAPR" />
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</docvars>
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<iclassintro count="2"></iclassintro>
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<arch_variants>
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<arch_variant name="ARMv8.2" feature="FEAT_LRCPC3" />
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</arch_variants>
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<regdiagram form="32" psname="aarch64/instrs/memory/ordered-rcpc/writeback" tworows="1">
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<box hibit="31" width="2" name="size" usename="1" settings="1" psbits="xx">
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<c>1</c>
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<c>x</c>
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</box>
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<box hibit="29" width="3" settings="3">
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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="26" name="V" settings="1">
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<c>0</c>
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</box>
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<box hibit="25" width="3" settings="3">
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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="22" name="L" settings="1">
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<c>1</c>
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</box>
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<box hibit="21" width="12" settings="12">
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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>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>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="9" width="5" name="Rn" 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="Rt" 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="LDAPR_32L_ldapstl_writeback" oneofinclass="2" oneof="4" label="32-bit" bitdiffs="size == 10">
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<docvars>
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<docvar key="address-form" value="post-indexed" />
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<docvar key="address-form-reg-type" value="post-indexed-32-reg" />
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<docvar key="atomic-ops" value="LDAPR-32-reg" />
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<docvar key="instr-class" value="general" />
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<docvar key="isa" value="A64" />
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<docvar key="mnemonic" value="LDAPR" />
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<docvar key="reg-type" value="32-reg" />
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</docvars>
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<box hibit="31" width="2" name="size">
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<c></c>
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<c>0</c>
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</box>
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<asmtemplate><text>LDAPR </text><a link="sa_wt" hover="32-bit general-purpose register to be loaded (field "Rt")"><Wt></a><text>, [</text><a link="sa_xn_sp" hover="64-bit general-purpose base register or SP (field "Rn")"><Xn|SP></a><text>], #4</text></asmtemplate>
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</encoding>
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<encoding name="LDAPR_64L_ldapstl_writeback" oneofinclass="2" oneof="4" label="64-bit" bitdiffs="size == 11">
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<docvars>
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<docvar key="address-form" value="post-indexed" />
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<docvar key="address-form-reg-type" value="post-indexed-64-reg" />
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<docvar key="atomic-ops" value="LDAPR-64-reg" />
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<docvar key="instr-class" value="general" />
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<docvar key="isa" value="A64" />
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<docvar key="mnemonic" value="LDAPR" />
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<docvar key="reg-type" value="64-reg" />
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</docvars>
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<box hibit="31" width="2" name="size">
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<c></c>
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<c>1</c>
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</box>
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<asmtemplate><text>LDAPR </text><a link="sa_xt" hover="64-bit general-purpose register to be loaded (field "Rt")"><Xt></a><text>, [</text><a link="sa_xn_sp" hover="64-bit general-purpose base register or SP (field "Rn")"><Xn|SP></a><text>], #8</text></asmtemplate>
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</encoding>
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<ps_section howmany="1">
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<ps name="aarch64/instrs/memory/ordered-rcpc/writeback" mylink="aarch64.instrs.memory.ordered-rcpc.writeback" enclabels="" sections="1" secttype="noheading">
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<pstext mayhavelinks="1" section="Decode" rep_section="decode">boolean wback = TRUE;
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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>(Rn);
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integer t = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(Rt);
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integer regsize = if size == '11' then 64 else 32;
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integer datasize = 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 offset = 1 << <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(size);
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boolean tagchecked = wback || n != 31;
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boolean wb_unknown = FALSE;
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if wback && n == t && n != 31 then
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<a link="Constraint" file="shared_pseudocode.xml" hover="enumeration Constraint { Constraint_NONE, Constraint_UNKNOWN, Constraint_UNDEF, Constraint_UNDEFEL0, Constraint_NOP, Constraint_TRUE, Constraint_FALSE, Constraint_DISABLED, Constraint_UNCOND, Constraint_COND, Constraint_ADDITIONAL_DECODE, Constraint_WBSUPPRESS, Constraint_FAULT, Constraint_LIMITED_ATOMICITY, Constraint_NVNV1_00, Constraint_NVNV1_01, Constraint_NVNV1_11, Constraint_EL1TIMESTAMP, Constraint_EL2TIMESTAMP, Constraint_OSH, Constraint_ISH, Constraint_NSH, Constraint_NC, Constraint_WT, Constraint_WB, Constraint_FORCE, Constraint_FORCENOSLCHECK, Constraint_MAPTOALLOCATED, Constraint_PMSCR_PCT_VIRT }">Constraint</a> c = <a link="impl-shared.ConstrainUnpredictable.1" file="shared_pseudocode.xml" hover="function: Constraint ConstrainUnpredictable(Unpredictable which)">ConstrainUnpredictable</a>(<a link="Unpredictable_WBOVERLAPLD" file="shared_pseudocode.xml" hover="enumeration Unpredictable { Unpredictable_VMSR, Unpredictable_WBOVERLAPLD, Unpredictable_WBOVERLAPST, Unpredictable_LDPOVERLAP, Unpredictable_BASEOVERLAP, Unpredictable_DATAOVERLAP, Unpredictable_DEVPAGE2, Unpredictable_INSTRDEVICE, Unpredictable_RESCPACR, Unpredictable_RESMAIR, Unpredictable_S1CTAGGED, Unpredictable_S2RESMEMATTR, Unpredictable_RESTEXCB, Unpredictable_RESPRRR, Unpredictable_RESDACR, Unpredictable_RESVTCRS, Unpredictable_RESTnSZ, Unpredictable_RESTCF, Unpredictable_DEVICETAGSTORE, Unpredictable_OORTnSZ, Unpredictable_LARGEIPA, Unpredictable_ESRCONDPASS, Unpredictable_ILZEROIT, Unpredictable_ILZEROT, Unpredictable_BPVECTORCATCHPRI, Unpredictable_VCMATCHHALF, Unpredictable_VCMATCHDAPA, Unpredictable_WPMASKANDBAS, Unpredictable_WPBASCONTIGUOUS, Unpredictable_RESWPMASK, Unpredictable_WPMASKEDBITS, Unpredictable_RESBPWPCTRL, Unpredictable_BPNOTIMPL, Unpredictable_RESBPTYPE, Unpredictable_BPNOTCTXCMP, Unpredictable_BPMATCHHALF, Unpredictable_BPMISMATCHHALF, Unpredictable_RESTARTALIGNPC, Unpredictable_RESTARTZEROUPPERPC, Unpredictable_ZEROUPPER, Unpredictable_ERETZEROUPPERPC, Unpredictable_A32FORCEALIGNPC, Unpredictable_SMD, Unpredictable_NONFAULT, Unpredictable_SVEZEROUPPER, Unpredictable_SVELDNFDATA, Unpredictable_SVELDNFZERO, Unpredictable_CHECKSPNONEACTIVE, Unpredictable_SMEZEROUPPER, Unpredictable_NVNV1, Unpredictable_Shareability, Unpredictable_AFUPDATE, Unpredictable_DBUPDATE, Unpredictable_IESBinDebug, Unpredictable_BADPMSFCR, Unpredictable_ZEROBTYPE, Unpredictable_EL2TIMESTAMP, Unpredictable_EL1TIMESTAMP, Unpredictable_RESERVEDNSxB, Unpredictable_WFxTDEBUG, Unpredictable_LS64UNSUPPORTED, Unpredictable_MISALIGNEDATOMIC, Unpredictable_CLEARERRITEZERO, Unpredictable_ALUEXCEPTIONRETURN, Unpredictable_IGNORETRAPINDEBUG, Unpredictable_DBGxVR_RESS, Unpredictable_PMUEVENTCOUNTER, Unpredictable_PMSCR_PCT, Unpredictable_CounterReservedForEL2, Unpredictable_BRBFILTRATE, Unpredictable_MOPSOVERLAP31, Unpredictable_STOREONLYTAGCHECKEDCAS, Unpredictable_RESTC }">Unpredictable_WBOVERLAPLD</a>);
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assert c IN {<a link="Constraint_WBSUPPRESS" file="shared_pseudocode.xml" hover="enumeration Constraint { Constraint_NONE, Constraint_UNKNOWN, Constraint_UNDEF, Constraint_UNDEFEL0, Constraint_NOP, Constraint_TRUE, Constraint_FALSE, Constraint_DISABLED, Constraint_UNCOND, Constraint_COND, Constraint_ADDITIONAL_DECODE, Constraint_WBSUPPRESS, Constraint_FAULT, Constraint_LIMITED_ATOMICITY, Constraint_NVNV1_00, Constraint_NVNV1_01, Constraint_NVNV1_11, Constraint_EL1TIMESTAMP, Constraint_EL2TIMESTAMP, Constraint_OSH, Constraint_ISH, Constraint_NSH, Constraint_NC, Constraint_WT, Constraint_WB, Constraint_FORCE, Constraint_FORCENOSLCHECK, Constraint_MAPTOALLOCATED, Constraint_PMSCR_PCT_VIRT }">Constraint_WBSUPPRESS</a>, <a link="Constraint_UNKNOWN" file="shared_pseudocode.xml" hover="enumeration Constraint { Constraint_NONE, Constraint_UNKNOWN, Constraint_UNDEF, Constraint_UNDEFEL0, Constraint_NOP, Constraint_TRUE, Constraint_FALSE, Constraint_DISABLED, Constraint_UNCOND, Constraint_COND, Constraint_ADDITIONAL_DECODE, Constraint_WBSUPPRESS, Constraint_FAULT, Constraint_LIMITED_ATOMICITY, Constraint_NVNV1_00, Constraint_NVNV1_01, Constraint_NVNV1_11, Constraint_EL1TIMESTAMP, Constraint_EL2TIMESTAMP, Constraint_OSH, Constraint_ISH, Constraint_NSH, Constraint_NC, Constraint_WT, Constraint_WB, Constraint_FORCE, Constraint_FORCENOSLCHECK, Constraint_MAPTOALLOCATED, Constraint_PMSCR_PCT_VIRT }">Constraint_UNKNOWN</a>, <a link="Constraint_UNDEF" file="shared_pseudocode.xml" hover="enumeration Constraint { Constraint_NONE, Constraint_UNKNOWN, Constraint_UNDEF, Constraint_UNDEFEL0, Constraint_NOP, Constraint_TRUE, Constraint_FALSE, Constraint_DISABLED, Constraint_UNCOND, Constraint_COND, Constraint_ADDITIONAL_DECODE, Constraint_WBSUPPRESS, Constraint_FAULT, Constraint_LIMITED_ATOMICITY, Constraint_NVNV1_00, Constraint_NVNV1_01, Constraint_NVNV1_11, Constraint_EL1TIMESTAMP, Constraint_EL2TIMESTAMP, Constraint_OSH, Constraint_ISH, Constraint_NSH, Constraint_NC, Constraint_WT, Constraint_WB, Constraint_FORCE, Constraint_FORCENOSLCHECK, Constraint_MAPTOALLOCATED, Constraint_PMSCR_PCT_VIRT }">Constraint_UNDEF</a>, <a link="Constraint_NOP" file="shared_pseudocode.xml" hover="enumeration Constraint { Constraint_NONE, Constraint_UNKNOWN, Constraint_UNDEF, Constraint_UNDEFEL0, Constraint_NOP, Constraint_TRUE, Constraint_FALSE, Constraint_DISABLED, Constraint_UNCOND, Constraint_COND, Constraint_ADDITIONAL_DECODE, Constraint_WBSUPPRESS, Constraint_FAULT, Constraint_LIMITED_ATOMICITY, Constraint_NVNV1_00, Constraint_NVNV1_01, Constraint_NVNV1_11, Constraint_EL1TIMESTAMP, Constraint_EL2TIMESTAMP, Constraint_OSH, Constraint_ISH, Constraint_NSH, Constraint_NC, Constraint_WT, Constraint_WB, Constraint_FORCE, Constraint_FORCENOSLCHECK, Constraint_MAPTOALLOCATED, Constraint_PMSCR_PCT_VIRT }">Constraint_NOP</a>};
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case c of
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when <a link="Constraint_WBSUPPRESS" file="shared_pseudocode.xml" hover="enumeration Constraint { Constraint_NONE, Constraint_UNKNOWN, Constraint_UNDEF, Constraint_UNDEFEL0, Constraint_NOP, Constraint_TRUE, Constraint_FALSE, Constraint_DISABLED, Constraint_UNCOND, Constraint_COND, Constraint_ADDITIONAL_DECODE, Constraint_WBSUPPRESS, Constraint_FAULT, Constraint_LIMITED_ATOMICITY, Constraint_NVNV1_00, Constraint_NVNV1_01, Constraint_NVNV1_11, Constraint_EL1TIMESTAMP, Constraint_EL2TIMESTAMP, Constraint_OSH, Constraint_ISH, Constraint_NSH, Constraint_NC, Constraint_WT, Constraint_WB, Constraint_FORCE, Constraint_FORCENOSLCHECK, Constraint_MAPTOALLOCATED, Constraint_PMSCR_PCT_VIRT }">Constraint_WBSUPPRESS</a> wback = FALSE; // writeback is suppressed
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when <a link="Constraint_UNKNOWN" file="shared_pseudocode.xml" hover="enumeration Constraint { Constraint_NONE, Constraint_UNKNOWN, Constraint_UNDEF, Constraint_UNDEFEL0, Constraint_NOP, Constraint_TRUE, Constraint_FALSE, Constraint_DISABLED, Constraint_UNCOND, Constraint_COND, Constraint_ADDITIONAL_DECODE, Constraint_WBSUPPRESS, Constraint_FAULT, Constraint_LIMITED_ATOMICITY, Constraint_NVNV1_00, Constraint_NVNV1_01, Constraint_NVNV1_11, Constraint_EL1TIMESTAMP, Constraint_EL2TIMESTAMP, Constraint_OSH, Constraint_ISH, Constraint_NSH, Constraint_NC, Constraint_WT, Constraint_WB, Constraint_FORCE, Constraint_FORCENOSLCHECK, Constraint_MAPTOALLOCATED, Constraint_PMSCR_PCT_VIRT }">Constraint_UNKNOWN</a> wb_unknown = TRUE; // writeback is UNKNOWN
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when <a link="Constraint_UNDEF" file="shared_pseudocode.xml" hover="enumeration Constraint { Constraint_NONE, Constraint_UNKNOWN, Constraint_UNDEF, Constraint_UNDEFEL0, Constraint_NOP, Constraint_TRUE, Constraint_FALSE, Constraint_DISABLED, Constraint_UNCOND, Constraint_COND, Constraint_ADDITIONAL_DECODE, Constraint_WBSUPPRESS, Constraint_FAULT, Constraint_LIMITED_ATOMICITY, Constraint_NVNV1_00, Constraint_NVNV1_01, Constraint_NVNV1_11, Constraint_EL1TIMESTAMP, Constraint_EL2TIMESTAMP, Constraint_OSH, Constraint_ISH, Constraint_NSH, Constraint_NC, Constraint_WT, Constraint_WB, Constraint_FORCE, Constraint_FORCENOSLCHECK, Constraint_MAPTOALLOCATED, Constraint_PMSCR_PCT_VIRT }">Constraint_UNDEF</a> UNDEFINED;
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when <a link="Constraint_NOP" file="shared_pseudocode.xml" hover="enumeration Constraint { Constraint_NONE, Constraint_UNKNOWN, Constraint_UNDEF, Constraint_UNDEFEL0, Constraint_NOP, Constraint_TRUE, Constraint_FALSE, Constraint_DISABLED, Constraint_UNCOND, Constraint_COND, Constraint_ADDITIONAL_DECODE, Constraint_WBSUPPRESS, Constraint_FAULT, Constraint_LIMITED_ATOMICITY, Constraint_NVNV1_00, Constraint_NVNV1_01, Constraint_NVNV1_11, Constraint_EL1TIMESTAMP, Constraint_EL2TIMESTAMP, Constraint_OSH, Constraint_ISH, Constraint_NSH, Constraint_NC, Constraint_WT, Constraint_WB, Constraint_FORCE, Constraint_FORCENOSLCHECK, Constraint_MAPTOALLOCATED, Constraint_PMSCR_PCT_VIRT }">Constraint_NOP</a> <a link="impl-shared.EndOfInstruction.0" file="shared_pseudocode.xml" hover="function: EndOfInstruction()">EndOfInstruction</a>();</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="LDAPR_32L_memop, LDAPR_32L_ldapstl_writeback" symboldefcount="1">
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<symbol link="sa_wt"><Wt></symbol>
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<account encodedin="Rt">
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<intro>
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<para>Is the 32-bit name of the general-purpose register to be loaded, encoded in the "Rt" field.</para>
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</intro>
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|
</account>
|
|
</explanation>
|
|
<explanation enclist="LDAPR_64L_memop, LDAPR_64L_ldapstl_writeback" symboldefcount="1">
|
|
<symbol link="sa_xt"><Xt></symbol>
|
|
<account encodedin="Rt">
|
|
<intro>
|
|
<para>Is the 64-bit name of the general-purpose register to be loaded, encoded in the "Rt" field.</para>
|
|
</intro>
|
|
</account>
|
|
</explanation>
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|
<explanation enclist="LDAPR_32L_memop, LDAPR_64L_memop, LDAPR_32L_ldapstl_writeback, LDAPR_64L_ldapstl_writeback" symboldefcount="1">
|
|
<symbol link="sa_xn_sp"><Xn|SP></symbol>
|
|
<account encodedin="Rn">
|
|
<intro>
|
|
<para>Is the 64-bit name of the general-purpose base register or stack pointer, encoded in the "Rn" field.</para>
|
|
</intro>
|
|
</account>
|
|
</explanation>
|
|
</explanations>
|
|
<ps_section howmany="1">
|
|
<ps name="aarch64/instrs/memory/ordered-rcpc" mylink="execute" enclabels="" sections="1" secttype="Operation">
|
|
<pstext mayhavelinks="1" section="Execute" rep_section="execute">bits(64) address;
|
|
bits(datasize) data;
|
|
constant integer dbytes = datasize DIV 8;
|
|
|
|
<a link="AccessDescriptor" file="shared_pseudocode.xml" hover="type AccessDescriptor is ( AccessType acctype, bits(2) el, SecurityState ss, boolean acqsc, boolean acqpc, boolean relsc, boolean limitedordered, boolean exclusive, boolean atomicop, MemAtomicOp modop, boolean nontemporal, boolean read, boolean write, CacheOp cacheop, CacheOpScope opscope, CacheType cachetype, boolean pan, boolean transactional, boolean nonfault, boolean firstfault, boolean first, boolean contiguous, boolean streamingsve, boolean ls64, boolean mops, boolean rcw, boolean rcws, boolean toplevel, VARange varange, boolean a32lsmd, boolean tagchecked, boolean tagaccess, MPAMinfo mpam )">AccessDescriptor</a> accdesc = <a link="impl-shared.CreateAccDescLDAcqPC.1" file="shared_pseudocode.xml" hover="function: AccessDescriptor CreateAccDescLDAcqPC(boolean tagchecked)">CreateAccDescLDAcqPC</a>(tagchecked);
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|
|
|
if n == 31 then
|
|
<a link="impl-aarch64.CheckSPAlignment.0" file="shared_pseudocode.xml" hover="function: CheckSPAlignment()">CheckSPAlignment</a>();
|
|
address = <a link="impl-aarch64.SP.read.0" file="shared_pseudocode.xml" hover="accessor: bits(64) SP[]">SP</a>[];
|
|
else
|
|
address = <a link="impl-aarch64.X.read.2" file="shared_pseudocode.xml" hover="accessor: bits(width) X[integer n, integer width]">X</a>[n, 64];
|
|
|
|
data = <a link="impl-aarch64.Mem.read.3" file="shared_pseudocode.xml" hover="accessor: bits(size*8) Mem[bits(64) address, integer size, AccessDescriptor accdesc]">Mem</a>[address, dbytes, accdesc];
|
|
<a link="impl-aarch64.X.write.2" file="shared_pseudocode.xml" hover="accessor: X[integer n, integer width] = bits(width) value">X</a>[t, regsize] = <a link="impl-shared.ZeroExtend.2" file="shared_pseudocode.xml" hover="function: bits(N) ZeroExtend(bits(M) x, integer N)">ZeroExtend</a>(data, regsize);
|
|
|
|
if wback then
|
|
if wb_unknown then
|
|
address = bits(64) UNKNOWN;
|
|
else
|
|
address = address + offset;
|
|
if n == 31 then
|
|
<a link="impl-aarch64.SP.write.0" file="shared_pseudocode.xml" hover="accessor: SP[] = bits(64) value">SP</a>[] = address;
|
|
else
|
|
<a link="impl-aarch64.X.write.2" file="shared_pseudocode.xml" hover="accessor: X[integer n, integer width] = bits(width) value">X</a>[n, 64] = address;</pstext>
|
|
</ps>
|
|
</ps_section>
|
|
</instructionsection>
|