mirror of
https://github.com/pound-emu/ballistic.git
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114 lines
4.2 KiB
XML
114 lines
4.2 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<?xml-stylesheet type="text/xsl" encoding="UTF-8" href="iform.xsl" version="1.0"?>
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<!DOCTYPE instructionsection PUBLIC "-//ARM//DTD instructionsection //EN" "iform-p.dtd">
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<!-- Copyright (c) 2010-2022 Arm Limited or its affiliates. All rights reserved. -->
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<!-- This document is Non-Confidential. This document may only be used and distributed in accordance with the terms of the agreement entered into by Arm and the party that Arm delivered this document to. -->
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<instructionsection id="AXFLAG" title="AXFLAG -- A64" type="instruction">
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<docvars>
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<docvar key="instr-class" value="system" />
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<docvar key="isa" value="A64" />
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<docvar key="mnemonic" value="AXFLAG" />
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</docvars>
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<heading>AXFLAG</heading>
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<desc>
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<brief>
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<para>Convert floating-point condition flags from Arm to external format</para>
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</brief>
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<authored>
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<para>Convert floating-point condition flags from Arm to external format. This instruction converts the state of the PSTATE.{N,Z,C,V} flags from a form representing the result of an Arm floating-point scalar compare instruction to an alternative representation required by some software.</para>
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</authored>
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</desc>
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<alias_list howmany="0"></alias_list>
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<classes>
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<iclass name="System" oneof="1" id="iclass_system" no_encodings="1" isa="A64">
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<docvars>
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<docvar key="instr-class" value="system" />
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<docvar key="isa" value="A64" />
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<docvar key="mnemonic" value="AXFLAG" />
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</docvars>
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<iclassintro count="1"></iclassintro>
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<arch_variants>
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<arch_variant name="ARMv8.5" feature="FEAT_FlagM2" />
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</arch_variants>
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<regdiagram form="32" psname="aarch64/instrs/integer/flags/axflag" tworows="1">
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<box hibit="31" width="10" settings="10">
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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>1</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>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="21" name="L" settings="1">
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<c>0</c>
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</box>
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<box hibit="20" width="2" name="op0" 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="18" width="3" name="op1" settings="3">
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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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</box>
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<box hibit="15" width="4" name="CRn" settings="4">
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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="11" width="4" name="CRm" usename="1" settings="4" psbits="xxxx">
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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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</box>
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<box hibit="7" width="3" name="op2" settings="3">
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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="4" width="5" name="Rt" settings="5">
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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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</regdiagram>
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<encoding name="AXFLAG_M_pstate" oneofinclass="1" oneof="1" label="">
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<docvars>
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<docvar key="instr-class" value="system" />
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<docvar key="isa" value="A64" />
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<docvar key="mnemonic" value="AXFLAG" />
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</docvars>
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<asmtemplate><text>AXFLAG</text></asmtemplate>
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</encoding>
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<ps_section howmany="1">
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<ps name="aarch64/instrs/integer/flags/axflag" mylink="aarch64.instrs.integer.flags.axflag" enclabels="" sections="1" secttype="noheading">
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<pstext mayhavelinks="1" section="Decode" rep_section="decode">if !<a link="impl-shared.HaveFlagFormatExt.0" file="shared_pseudocode.xml" hover="function: boolean HaveFlagFormatExt()">HaveFlagFormatExt</a>() then UNDEFINED;</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"></explanations>
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<ps_section howmany="1">
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<ps name="aarch64/instrs/integer/flags/axflag" mylink="execute" enclabels="" sections="1" secttype="Operation">
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<pstext mayhavelinks="1" section="Execute" rep_section="execute">bit n = '0';
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bit z = PSTATE.Z OR PSTATE.V;
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bit c = PSTATE.C AND NOT(PSTATE.V);
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bit v = '0';
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PSTATE.N = n;
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PSTATE.Z = z;
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PSTATE.C = c;
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PSTATE.V = v;</pstext>
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</ps>
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</ps_section>
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</instructionsection>
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