364 lines
20 KiB
XML
364 lines
20 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="VRINTR_vfp" title="VRINTR -- AArch32" type="instruction">
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<docvars>
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<docvar key="instr-class" value="fpsimd" />
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<docvar key="mnemonic" value="VRINTR" />
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</docvars>
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<heading>VRINTR</heading>
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<desc>
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<brief>
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<para>Round floating-point to integer</para>
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</brief>
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<authored>
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<para>Round floating-point to integer rounds a floating-point value to an integral floating-point value of the same size using the rounding mode specified in the FPSCR. A zero input gives a zero result with the same sign, an infinite input gives an infinite result with the same sign, and a NaN is propagated as for normal arithmetic.</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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<classesintro count="2">
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<txt>It has encodings from the following instruction sets:</txt>
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<txt> A32 (</txt>
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<a href="#iclass_a1">A1</a>
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<txt>)</txt>
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<txt> and </txt>
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<txt> T32 (</txt>
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<a href="#iclass_t1">T1</a>
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<txt>)</txt>
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<txt>.</txt>
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</classesintro>
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<iclass name="A1" oneof="2" id="iclass_a1" no_encodings="3" isa="A32">
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<docvars>
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<docvar key="armarmheading" value="A1" />
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<docvar key="instr-class" value="fpsimd" />
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<docvar key="isa" value="A32" />
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<docvar key="mnemonic" value="VRINTR" />
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</docvars>
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<iclassintro count="3"></iclassintro>
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<regdiagram form="32" psname="aarch32/instrs/VRINTZ_vfp/A1_A.txt" tworows="1">
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<box hibit="31" width="4" name="cond" usename="1" settings="4" constraint="!= 1111">
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<c colspan="4">!= 1111</c>
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</box>
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<box hibit="27" width="5" 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>0</c>
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<c>1</c>
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</box>
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<box hibit="22" name="D" usename="1">
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<c></c>
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</box>
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<box hibit="21" width="2" settings="2">
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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="19" name="o1" settings="1">
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<c>0</c>
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</box>
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<box hibit="18" width="3" name="opc2" settings="3">
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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="15" width="4" name="Vd" usename="1">
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<c colspan="4"></c>
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</box>
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<box hibit="11" width="2" settings="2">
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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="2" name="size" usename="1">
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<c colspan="2"></c>
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</box>
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<box hibit="7" name="op" usename="1" settings="1">
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<c>0</c>
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</box>
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<box hibit="6" settings="1">
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<c>1</c>
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</box>
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<box hibit="5" name="M" usename="1">
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<c></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="Vm" 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="VRINTR_vfp_A1_H" oneofinclass="3" oneof="6" label="Half-precision scalar" bitdiffs="size == 01">
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<docvars>
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<docvar key="armarmheading" value="A1" />
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<docvar key="fpdatasize" value="halfprec" />
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<docvar key="instr-class" value="fpsimd" />
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<docvar key="isa" value="A32" />
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<docvar key="mnemonic" value="VRINTR" />
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<docvar key="mnemonic-fpdatasize" value="VRINTR-halfprec" />
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</docvars>
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<arch_variants>
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<arch_variant name="ARMv8.2" feature="FEAT_FP16" />
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</arch_variants>
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<box hibit="9" width="2" name="size">
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<c>0</c>
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<c>1</c>
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</box>
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<asmtemplate><text>VRINTR</text><text>{</text><a link="sa_c" hover="See {xref{ARMARM_Babbefhf}{Standard assembler syntax fields}}"><c></a><text>}</text><text>{</text><a link="sa_q" hover="See {xref{ARMARM_Babbefhf}{Standard assembler syntax fields}}"><q></a><text>}</text><text>.F16 </text><a link="sa_sd" hover="32-bit SIMD&FP destination register (field "Vd:D")"><Sd></a><text>, </text><a link="sa_sm" hover="32-bit SIMD&FP source register (field "Vm:M")"><Sm></a></asmtemplate>
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</encoding>
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<encoding name="VRINTR_vfp_A1_S" oneofinclass="3" oneof="6" label="Single-precision scalar" bitdiffs="size == 10">
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<docvars>
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<docvar key="armarmheading" value="A1" />
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<docvar key="fpdatasize" value="singleprec" />
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<docvar key="instr-class" value="fpsimd" />
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<docvar key="isa" value="A32" />
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<docvar key="mnemonic" value="VRINTR" />
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<docvar key="mnemonic-fpdatasize" value="VRINTR-singleprec" />
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</docvars>
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<box hibit="9" width="2" name="size">
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<c>1</c>
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<c>0</c>
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</box>
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<asmtemplate><text>VRINTR</text><text>{</text><a link="sa_c" hover="See {xref{ARMARM_Babbefhf}{Standard assembler syntax fields}}"><c></a><text>}</text><text>{</text><a link="sa_q" hover="See {xref{ARMARM_Babbefhf}{Standard assembler syntax fields}}"><q></a><text>}</text><text>.F32 </text><a link="sa_sd" hover="32-bit SIMD&FP destination register (field "Vd:D")"><Sd></a><text>, </text><a link="sa_sm" hover="32-bit SIMD&FP source register (field "Vm:M")"><Sm></a></asmtemplate>
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</encoding>
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<encoding name="VRINTR_vfp_A1_D" oneofinclass="3" oneof="6" label="Double-precision scalar" bitdiffs="size == 11">
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<docvars>
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<docvar key="armarmheading" value="A1" />
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<docvar key="fpdatasize" value="doubleprec" />
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<docvar key="instr-class" value="fpsimd" />
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<docvar key="isa" value="A32" />
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<docvar key="mnemonic" value="VRINTR" />
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<docvar key="mnemonic-fpdatasize" value="VRINTR-doubleprec" />
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</docvars>
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<box hibit="9" width="2" name="size">
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<c>1</c>
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<c>1</c>
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</box>
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<asmtemplate><text>VRINTR</text><text>{</text><a link="sa_c" hover="See {xref{ARMARM_Babbefhf}{Standard assembler syntax fields}}"><c></a><text>}</text><text>{</text><a link="sa_q" hover="See {xref{ARMARM_Babbefhf}{Standard assembler syntax fields}}"><q></a><text>}</text><text>.F64 </text><a link="sa_dd" hover="64-bit SIMD&FP destination register (field "D:Vd")"><Dd></a><text>, </text><a link="sa_dm" hover="64-bit SIMD&FP source register (field "M:Vm")"><Dm></a></asmtemplate>
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</encoding>
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<ps_section howmany="1">
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<ps name="aarch32/instrs/VRINTZ_vfp/A1_A.txt" mylink="aarch32.instrs.VRINTZ_vfp.A1_A.txt" enclabels="" sections="1" secttype="noheading">
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<pstext mayhavelinks="1" section="Decode" rep_section="decode">if size == '00' || (size == '01' && !<a link="impl-shared.HaveFP16Ext.0" file="shared_pseudocode.xml" hover="function: boolean HaveFP16Ext()">HaveFP16Ext</a>()) then UNDEFINED;
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if size == '01' && cond != '1110' then UNPREDICTABLE;
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rounding = if op == '1' then <a link="FPRounding_ZERO" file="shared_pseudocode.xml" hover="enumeration FPRounding {FPRounding_TIEEVEN, FPRounding_POSINF, FPRounding_NEGINF, FPRounding_ZERO, FPRounding_TIEAWAY, FPRounding_ODD}">FPRounding_ZERO</a> else <a link="impl-shared.FPRoundingMode.1" file="shared_pseudocode.xml" hover="function: FPRounding FPRoundingMode(FPCRType fpcr)">FPRoundingMode</a>(FPSCR[]);
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exact = FALSE;
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integer esize;
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integer d;
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integer m;
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case size of
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when '01' esize = 16; d = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(Vd:D); m = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(Vm:M);
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when '10' esize = 32; d = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(Vd:D); m = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(Vm:M);
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when '11' esize = 64; d = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(D:Vd); m = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(M:Vm);</pstext>
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</ps>
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</ps_section>
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</iclass>
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<iclass name="T1" oneof="2" id="iclass_t1" no_encodings="3" isa="T32">
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<docvars>
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<docvar key="armarmheading" value="T1" />
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<docvar key="instr-class" value="fpsimd" />
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<docvar key="isa" value="T32" />
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<docvar key="mnemonic" value="VRINTR" />
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</docvars>
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<iclassintro count="3"></iclassintro>
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<regdiagram form="16x2" psname="aarch32/instrs/VRINTZ_vfp/T1_A.txt" tworows="1">
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<box hibit="31" width="9" settings="9">
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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>0</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>0</c>
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<c>1</c>
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</box>
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<box hibit="22" name="D" usename="1">
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<c></c>
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</box>
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<box hibit="21" width="2" settings="2">
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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="19" name="o1" settings="1">
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<c>0</c>
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</box>
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<box hibit="18" width="3" name="opc2" settings="3">
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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="15" width="4" name="Vd" usename="1">
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<c colspan="4"></c>
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</box>
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<box hibit="11" width="2" settings="2">
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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="2" name="size" usename="1">
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<c colspan="2"></c>
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</box>
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<box hibit="7" name="op" usename="1" settings="1">
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<c>0</c>
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</box>
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<box hibit="6" settings="1">
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<c>1</c>
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</box>
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<box hibit="5" name="M" usename="1">
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<c></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="Vm" 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="VRINTR_vfp_T1_H" oneofinclass="3" oneof="6" label="Half-precision scalar" bitdiffs="size == 01">
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<docvars>
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<docvar key="armarmheading" value="T1" />
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<docvar key="fpdatasize" value="halfprec" />
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<docvar key="instr-class" value="fpsimd" />
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<docvar key="isa" value="T32" />
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<docvar key="mnemonic" value="VRINTR" />
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<docvar key="mnemonic-fpdatasize" value="VRINTR-halfprec" />
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</docvars>
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<arch_variants>
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<arch_variant name="ARMv8.2" feature="FEAT_FP16" />
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</arch_variants>
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<box hibit="9" width="2" name="size">
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<c>0</c>
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<c>1</c>
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</box>
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<asmtemplate><text>VRINTR</text><text>{</text><a link="sa_c" hover="See {xref{ARMARM_Babbefhf}{Standard assembler syntax fields}}"><c></a><text>}</text><text>{</text><a link="sa_q" hover="See {xref{ARMARM_Babbefhf}{Standard assembler syntax fields}}"><q></a><text>}</text><text>.F16 </text><a link="sa_sd" hover="32-bit SIMD&FP destination register (field "Vd:D")"><Sd></a><text>, </text><a link="sa_sm" hover="32-bit SIMD&FP source register (field "Vm:M")"><Sm></a></asmtemplate>
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</encoding>
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<encoding name="VRINTR_vfp_T1_S" oneofinclass="3" oneof="6" label="Single-precision scalar" bitdiffs="size == 10">
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<docvars>
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<docvar key="armarmheading" value="T1" />
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<docvar key="fpdatasize" value="singleprec" />
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<docvar key="instr-class" value="fpsimd" />
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<docvar key="isa" value="T32" />
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<docvar key="mnemonic" value="VRINTR" />
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<docvar key="mnemonic-fpdatasize" value="VRINTR-singleprec" />
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</docvars>
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<box hibit="9" width="2" name="size">
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<c>1</c>
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<c>0</c>
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</box>
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<asmtemplate><text>VRINTR</text><text>{</text><a link="sa_c" hover="See {xref{ARMARM_Babbefhf}{Standard assembler syntax fields}}"><c></a><text>}</text><text>{</text><a link="sa_q" hover="See {xref{ARMARM_Babbefhf}{Standard assembler syntax fields}}"><q></a><text>}</text><text>.F32 </text><a link="sa_sd" hover="32-bit SIMD&FP destination register (field "Vd:D")"><Sd></a><text>, </text><a link="sa_sm" hover="32-bit SIMD&FP source register (field "Vm:M")"><Sm></a></asmtemplate>
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</encoding>
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<encoding name="VRINTR_vfp_T1_D" oneofinclass="3" oneof="6" label="Double-precision scalar" bitdiffs="size == 11">
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<docvars>
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<docvar key="armarmheading" value="T1" />
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<docvar key="fpdatasize" value="doubleprec" />
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<docvar key="instr-class" value="fpsimd" />
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<docvar key="isa" value="T32" />
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<docvar key="mnemonic" value="VRINTR" />
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<docvar key="mnemonic-fpdatasize" value="VRINTR-doubleprec" />
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</docvars>
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<box hibit="9" width="2" name="size">
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<c>1</c>
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<c>1</c>
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</box>
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<asmtemplate><text>VRINTR</text><text>{</text><a link="sa_c" hover="See {xref{ARMARM_Babbefhf}{Standard assembler syntax fields}}"><c></a><text>}</text><text>{</text><a link="sa_q" hover="See {xref{ARMARM_Babbefhf}{Standard assembler syntax fields}}"><q></a><text>}</text><text>.F64 </text><a link="sa_dd" hover="64-bit SIMD&FP destination register (field "D:Vd")"><Dd></a><text>, </text><a link="sa_dm" hover="64-bit SIMD&FP source register (field "M:Vm")"><Dm></a></asmtemplate>
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</encoding>
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<ps_section howmany="1">
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<ps name="aarch32/instrs/VRINTZ_vfp/T1_A.txt" mylink="aarch32.instrs.VRINTZ_vfp.T1_A.txt" enclabels="" sections="1" secttype="noheading">
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<pstext mayhavelinks="1" section="Decode" rep_section="decode">if size == '00' || (size == '01' && !<a link="impl-shared.HaveFP16Ext.0" file="shared_pseudocode.xml" hover="function: boolean HaveFP16Ext()">HaveFP16Ext</a>()) then UNDEFINED;
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if size == '01' && <a link="impl-aarch32.InITBlock.0" file="shared_pseudocode.xml" hover="function: boolean InITBlock()">InITBlock</a>() then UNPREDICTABLE;
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rounding = if op == '1' then <a link="FPRounding_ZERO" file="shared_pseudocode.xml" hover="enumeration FPRounding {FPRounding_TIEEVEN, FPRounding_POSINF, FPRounding_NEGINF, FPRounding_ZERO, FPRounding_TIEAWAY, FPRounding_ODD}">FPRounding_ZERO</a> else <a link="impl-shared.FPRoundingMode.1" file="shared_pseudocode.xml" hover="function: FPRounding FPRoundingMode(FPCRType fpcr)">FPRoundingMode</a>(FPSCR[]);
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exact = FALSE;
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integer esize;
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integer d;
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integer m;
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case size of
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when '01' esize = 16; d = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(Vd:D); m = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(Vm:M);
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when '10' esize = 32; d = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(Vd:D); m = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(Vm:M);
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when '11' esize = 64; d = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(D:Vd); m = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(M:Vm);</pstext>
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</ps>
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</ps_section>
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<constrained_unpredictables encoding="T1" ps_block="Decode">
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<cu_case>
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<cu_cause>
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<pstext mayhavelinks="1">InITBlock()</pstext>
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</cu_cause>
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<cu_type constraint="Constraint_UNDEF" />
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<cu_type>
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<cu_type_text>The instruction executes as if it passes the Condition code check.</cu_type_text>
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</cu_type>
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<cu_type>
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<cu_type_text>The instruction executes as NOP. This means it behaves as if it fails the Condition code check.</cu_type_text>
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</cu_type>
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<arch_variants>
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<arch_variant name="ARMv8.2-A" />
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</arch_variants>
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</cu_case>
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</constrained_unpredictables>
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</iclass>
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</classes>
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<explanations scope="all">
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<explanation enclist="VRINTR_vfp_A1_H, VRINTR_vfp_T1_H" symboldefcount="1">
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<symbol link="sa_c"><c></symbol>
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<account encodedin="">
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<intro>
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<para>See <xref linkend="Babbefhf">Standard assembler syntax fields</xref>.</para>
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</intro>
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</account>
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</explanation>
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<explanation enclist="VRINTR_vfp_A1_H, VRINTR_vfp_T1_H" symboldefcount="1">
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<symbol link="sa_q"><q></symbol>
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<account encodedin="">
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<intro>
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<para>See <xref linkend="Babbefhf">Standard assembler syntax fields</xref>.</para>
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</intro>
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</account>
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</explanation>
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<explanation enclist="VRINTR_vfp_A1_H, VRINTR_vfp_T1_H" symboldefcount="1">
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<symbol link="sa_sd"><Sd></symbol>
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<account encodedin="Vd:D">
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<intro>
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<para>Is the 32-bit name of the SIMD&FP destination register, encoded in the "Vd:D" field.</para>
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</intro>
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|
</account>
|
|
</explanation>
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|
<explanation enclist="VRINTR_vfp_A1_H, VRINTR_vfp_T1_H" symboldefcount="1">
|
|
<symbol link="sa_sm"><Sm></symbol>
|
|
<account encodedin="Vm:M">
|
|
<intro>
|
|
<para>Is the 32-bit name of the SIMD&FP source register, encoded in the "Vm:M" field.</para>
|
|
</intro>
|
|
</account>
|
|
</explanation>
|
|
<explanation enclist="VRINTR_vfp_A1_D, VRINTR_vfp_T1_D" symboldefcount="1">
|
|
<symbol link="sa_dd"><Dd></symbol>
|
|
<account encodedin="D:Vd">
|
|
<intro>
|
|
<para>Is the 64-bit name of the SIMD&FP destination register, encoded in the "D:Vd" field.</para>
|
|
</intro>
|
|
</account>
|
|
</explanation>
|
|
<explanation enclist="VRINTR_vfp_A1_D, VRINTR_vfp_T1_D" symboldefcount="1">
|
|
<symbol link="sa_dm"><Dm></symbol>
|
|
<account encodedin="M:Vm">
|
|
<intro>
|
|
<para>Is the 64-bit name of the SIMD&FP source register, encoded in the "M:Vm" field.</para>
|
|
</intro>
|
|
</account>
|
|
</explanation>
|
|
</explanations>
|
|
<ps_section howmany="1">
|
|
<ps name="aarch32/instrs/VRINTZ_vfp/Op_A.txt" mylink="execute" enclabels="" sections="1" secttype="Operation">
|
|
<pstext mayhavelinks="1" section="Execute" rep_section="execute">if <a link="impl-aarch32.ConditionPassed.0" file="shared_pseudocode.xml" hover="function: boolean ConditionPassed()">ConditionPassed</a>() then
|
|
EncodingSpecificOperations(); <a link="impl-aarch32.CheckVFPEnabled.1" file="shared_pseudocode.xml" hover="function: CheckVFPEnabled(boolean include_fpexc_check)">CheckVFPEnabled</a>(TRUE);
|
|
case esize of
|
|
when 16
|
|
<a link="impl-aarch32.S.write.1" file="shared_pseudocode.xml" hover="accessor: S[integer n] = bits(32) value">S</a>[d] = <a link="impl-shared.Zeros.1" file="shared_pseudocode.xml" hover="function: bits(N) Zeros(integer N)">Zeros</a>(16) : <a link="impl-shared.FPRoundInt.4" file="shared_pseudocode.xml" hover="function: bits(N) FPRoundInt(bits(N) op, FPCRType fpcr, FPRounding rounding, boolean exact)">FPRoundInt</a>(<a link="impl-aarch32.S.read.1" file="shared_pseudocode.xml" hover="accessor: bits(32) S[integer n]">S</a>[m]<15:0>, FPSCR[], rounding, exact);
|
|
when 32
|
|
<a link="impl-aarch32.S.write.1" file="shared_pseudocode.xml" hover="accessor: S[integer n] = bits(32) value">S</a>[d] = <a link="impl-shared.FPRoundInt.4" file="shared_pseudocode.xml" hover="function: bits(N) FPRoundInt(bits(N) op, FPCRType fpcr, FPRounding rounding, boolean exact)">FPRoundInt</a>(<a link="impl-aarch32.S.read.1" file="shared_pseudocode.xml" hover="accessor: bits(32) S[integer n]">S</a>[m], FPSCR[], rounding, exact);
|
|
when 64
|
|
<a link="impl-aarch32.D.write.1" file="shared_pseudocode.xml" hover="accessor: D[integer n] = bits(64) value">D</a>[d] = <a link="impl-shared.FPRoundInt.4" file="shared_pseudocode.xml" hover="function: bits(N) FPRoundInt(bits(N) op, FPCRType fpcr, FPRounding rounding, boolean exact)">FPRoundInt</a>(<a link="impl-aarch32.D.read.1" file="shared_pseudocode.xml" hover="accessor: bits(64) D[integer n]">D</a>[m], FPSCR[], rounding, exact);</pstext>
|
|
</ps>
|
|
</ps_section>
|
|
</instructionsection>
|