mirror of
https://github.com/pound-emu/ballistic.git
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158 lines
7.9 KiB
XML
158 lines
7.9 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="SUBPS" title="SUBPS -- 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="SUBPS" />
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</docvars>
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<heading>SUBPS</heading>
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<desc>
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<brief>
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<para>Subtract Pointer, setting Flags</para>
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</brief>
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<authored>
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<para>Subtract Pointer, setting Flags subtracts the 56-bit address held in the second source register from the 56-bit address held in the first source register, sign-extends the result to 64-bits, and writes the result to the destination register. It updates the condition flags based on the result of the subtraction.</para>
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</authored>
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</desc>
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<alias_list howmany="1">
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<alias_list_intro>This instruction is used by the alias </alias_list_intro>
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<aliasref aliaspageid="CMPP_SUBPS" aliasfile="cmpp_subps.xml" hover="Compare with Tag" punct=".">
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<text>CMPP</text>
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<aliaspref>S == '1' && Xd == '11111'</aliaspref>
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</aliasref>
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<alias_list_outro>
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<text> See </text>
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<aliastablelink />
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<text> below for details of when the alias is preferred.</text>
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</alias_list_outro>
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</alias_list>
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<classes>
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<iclass name="Integer" oneof="1" id="iclass_general" no_encodings="1" isa="A64">
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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="SUBPS" />
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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_MTE" />
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</arch_variants>
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<regdiagram form="32" psname="aarch64/instrs/integer/arithmetic/pointer/mcsubtracttaggedaddresssetflags">
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<box hibit="31" name="sf" settings="1">
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<c>1</c>
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</box>
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<box hibit="30" settings="1">
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<c>0</c>
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</box>
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<box hibit="29" name="S" settings="1">
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<c>1</c>
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</box>
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<box hibit="28" width="8" settings="8">
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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>1</c>
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<c>0</c>
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</box>
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<box hibit="20" width="5" name="Xm" usename="1">
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<c colspan="5"></c>
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</box>
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<box hibit="15" name="opcode<5>" settings="1">
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<c>0</c>
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</box>
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<box hibit="14" name="opcode<4>" settings="1">
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<c>0</c>
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</box>
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<box hibit="13" name="opcode<3>" settings="1">
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<c>0</c>
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</box>
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<box hibit="12" name="opcode<2>" settings="1">
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<c>0</c>
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</box>
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<box hibit="11" name="opcode<1>" settings="1">
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<c>0</c>
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</box>
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<box hibit="10" name="opcode<0>" settings="1">
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<c>0</c>
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</box>
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<box hibit="9" width="5" name="Xn" 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="Xd" 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="SUBPS_64S_dp_2src" oneofinclass="1" oneof="1" label="">
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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="SUBPS" />
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</docvars>
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<asmtemplate><text>SUBPS </text><a link="sa_xd" hover="64-bit general-purpose destination register (field "Xd")"><Xd></a><text>, </text><a link="sa_xn_sp" hover="First 64-bit source general-purpose register or SP (field "Xn")"><Xn|SP></a><text>, </text><a link="sa_xm_sp" hover="Second 64-bit general-purpose source register or SP (field "Xm")"><Xm|SP></a></asmtemplate>
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</encoding>
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<ps_section howmany="1">
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<ps name="aarch64/instrs/integer/arithmetic/pointer/mcsubtracttaggedaddresssetflags" mylink="aarch64.instrs.integer.arithmetic.pointer.mcsubtracttaggedaddresssetflags" enclabels="" sections="1" secttype="noheading">
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<pstext mayhavelinks="1" section="Decode" rep_section="decode">if !<a link="impl-shared.HaveMTEExt.0" file="shared_pseudocode.xml" hover="function: boolean HaveMTEExt()">HaveMTEExt</a>() then UNDEFINED;
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integer d = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(Xd);
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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>(Xn);
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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>(Xm);
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boolean setflags = TRUE;</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="SUBPS_64S_dp_2src" symboldefcount="1">
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<symbol link="sa_xd"><Xd></symbol>
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<account encodedin="Xd">
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<intro>
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<para>Is the 64-bit name of the general-purpose destination register, encoded in the "Xd" field.</para>
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</intro>
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</account>
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</explanation>
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<explanation enclist="SUBPS_64S_dp_2src" symboldefcount="1">
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<symbol link="sa_xn_sp"><Xn|SP></symbol>
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<account encodedin="Xn">
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<intro>
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<para>Is the 64-bit name of the first source general-purpose register or stack pointer, encoded in the "Xn" field.</para>
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</intro>
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</account>
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</explanation>
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<explanation enclist="SUBPS_64S_dp_2src" symboldefcount="1">
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<symbol link="sa_xm_sp"><Xm|SP></symbol>
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<account encodedin="Xm">
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<intro>
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<para>Is the 64-bit name of the second general-purpose source register or stack pointer, encoded in the "Xm" 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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<aliastablehook anchor="aliasconditions">Alias Conditions</aliastablehook>
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<ps_section howmany="1">
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<ps name="aarch64/instrs/integer/arithmetic/pointer/mcsubtracttaggedaddresssetflags" mylink="execute" enclabels="" sections="1" secttype="Operation">
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<pstext mayhavelinks="1" section="Execute" rep_section="execute">bits(64) operand1 = if n == 31 then <a link="impl-aarch64.SP.read.0" file="shared_pseudocode.xml" hover="accessor: bits(64) SP[]">SP</a>[] else <a link="impl-aarch64.X.read.2" file="shared_pseudocode.xml" hover="accessor: bits(width) X[integer n, integer width]">X</a>[n, 64];
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bits(64) operand2 = if m == 31 then <a link="impl-aarch64.SP.read.0" file="shared_pseudocode.xml" hover="accessor: bits(64) SP[]">SP</a>[] else <a link="impl-aarch64.X.read.2" file="shared_pseudocode.xml" hover="accessor: bits(width) X[integer n, integer width]">X</a>[m, 64];
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operand1 = <a link="impl-shared.SignExtend.2" file="shared_pseudocode.xml" hover="function: bits(N) SignExtend(bits(M) x, integer N)">SignExtend</a>(operand1<55:0>, 64);
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operand2 = <a link="impl-shared.SignExtend.2" file="shared_pseudocode.xml" hover="function: bits(N) SignExtend(bits(M) x, integer N)">SignExtend</a>(operand2<55:0>, 64);
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bits(64) result;
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bits(4) nzcv;
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operand2 = NOT(operand2);
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(result, nzcv) = <a link="impl-shared.AddWithCarry.3" file="shared_pseudocode.xml" hover="function: (bits(N), bits(4)) AddWithCarry(bits(N) x, bits(N) y, bit carry_in)">AddWithCarry</a>(operand1, operand2, '1');
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if setflags then
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PSTATE.<N,Z,C,V> = nzcv;
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<a link="impl-aarch64.X.write.2" file="shared_pseudocode.xml" hover="accessor: X[integer n, integer width] = bits(width) value">X</a>[d, 64] = result;</pstext>
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</ps>
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</ps_section>
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</instructionsection>
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