343 lines
17 KiB
XML
343 lines
17 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="VRINTP_asimd" title="VRINTP (Advanced SIMD) -- 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="VRINTP" />
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</docvars>
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<heading>VRINTP (Advanced SIMD)</heading>
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<desc>
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<brief>
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<para>Vector Round floating-point to integer towards +Infinity</para>
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</brief>
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<authored>
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<para>Vector Round floating-point to integer towards +Infinity rounds a vector of floating-point values to integral floating-point values of the same size using the Round towards +Infinity rounding mode. 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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<encodingnotes>
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<para>Related encodings: See <xref linkend="T32.encoding_index.simd_2r_misc">Advanced SIMD two registers misc</xref> for the T32 instruction set, or <xref linkend="A32.encoding_index.simd2reg_misc">Advanced SIMD two registers misc</xref> for the A32 instruction set.</para>
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</encodingnotes>
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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="2" 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="VRINTP" />
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</docvars>
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<iclassintro count="2"></iclassintro>
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<regdiagram form="32" psname="aarch32/instrs/VRINTA_asimd/A1_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>1</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>1</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" 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="17" width="2" name="opc1" 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="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" settings="1">
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<c>0</c>
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</box>
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<box hibit="10" settings="1">
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<c>1</c>
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</box>
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<box hibit="9" width="3" name="op" usename="1" 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="6" name="Q" usename="1">
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<c></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="VRINTP_asimd_A1_D" oneofinclass="2" oneof="4" label="64-bit SIMD vector" bitdiffs="Q == 0">
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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="VRINTP" />
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<docvar key="simdvectorsize" value="double" />
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</docvars>
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<box hibit="6" width="1" name="Q">
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<c>0</c>
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</box>
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<asmtemplate><text>VRINTP</text><text>{</text><a link="sa_q" hover="See {xref{ARMARM_Babbefhf}{Standard assembler syntax fields}}"><q></a><text>}</text><text>.</text><a link="sa_dt" hover="Data type for elements of vectors (field "size")"><dt></a><text> </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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<encoding name="VRINTP_asimd_A1_Q" oneofinclass="2" oneof="4" label="128-bit SIMD vector" bitdiffs="Q == 1">
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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="VRINTP" />
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<docvar key="simdvectorsize" value="quad" />
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</docvars>
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<box hibit="6" width="1" name="Q">
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<c>1</c>
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</box>
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<asmtemplate><text>VRINTP</text><text>{</text><a link="sa_q" hover="See {xref{ARMARM_Babbefhf}{Standard assembler syntax fields}}"><q></a><text>}</text><text>.</text><a link="sa_dt" hover="Data type for elements of vectors (field "size")"><dt></a><text> </text><a link="sa_qd" hover="128-bit SIMD&FP destination register (field "D:Vd")"><Qd></a><text>, </text><a link="sa_qm" hover="128-bit SIMD&FP source register (field "M:Vm")"><Qm></a></asmtemplate>
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</encoding>
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<ps_section howmany="1">
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<ps name="aarch32/instrs/VRINTA_asimd/A1_A.txt" mylink="aarch32.instrs.VRINTA_asimd.A1_A.txt" enclabels="" sections="1" secttype="noheading">
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<pstext mayhavelinks="1" section="Decode" rep_section="decode">if op<2> != op<0> then SEE "Related encodings";
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if Q == '1' && (Vd<0> == '1' || Vm<0> == '1') then UNDEFINED;
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if (size == '01' && !<a link="impl-shared.HaveFP16Ext.0" file="shared_pseudocode.xml" hover="function: boolean HaveFP16Ext()">HaveFP16Ext</a>()) || size IN {'00', '11'} then UNDEFINED;
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// Rounding encoded differently from other VCVT and VRINT instructions
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rounding = <a link="impl-shared.FPDecodeRM.1" file="shared_pseudocode.xml" hover="function: FPRounding FPDecodeRM(bits(2) rm)">FPDecodeRM</a>(op<2>:NOT(op<1>)); exact = FALSE;
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integer esize;
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integer elements;
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case size of
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when '01' esize = 16; elements = 4;
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when '10' esize = 32; elements = 2;
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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); regs = if Q == '0' then 1 else 2;</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="2" 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="VRINTP" />
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</docvars>
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<iclassintro count="2"></iclassintro>
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<regdiagram form="16x2" psname="aarch32/instrs/VRINTA_asimd/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>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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<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" 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="17" width="2" name="opc1" 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="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" settings="1">
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<c>0</c>
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</box>
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<box hibit="10" settings="1">
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<c>1</c>
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</box>
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<box hibit="9" width="3" name="op" usename="1" 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="6" name="Q" usename="1">
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<c></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="VRINTP_asimd_T1_D" oneofinclass="2" oneof="4" label="64-bit SIMD vector" bitdiffs="Q == 0">
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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="VRINTP" />
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<docvar key="simdvectorsize" value="double" />
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</docvars>
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<box hibit="6" width="1" name="Q">
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<c>0</c>
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</box>
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<asmtemplate><text>VRINTP</text><text>{</text><a link="sa_q" hover="See {xref{ARMARM_Babbefhf}{Standard assembler syntax fields}}"><q></a><text>}</text><text>.</text><a link="sa_dt" hover="Data type for elements of vectors (field "size")"><dt></a><text> </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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<encoding name="VRINTP_asimd_T1_Q" oneofinclass="2" oneof="4" label="128-bit SIMD vector" bitdiffs="Q == 1">
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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="VRINTP" />
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<docvar key="simdvectorsize" value="quad" />
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</docvars>
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<box hibit="6" width="1" name="Q">
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<c>1</c>
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</box>
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<asmtemplate><text>VRINTP</text><text>{</text><a link="sa_q" hover="See {xref{ARMARM_Babbefhf}{Standard assembler syntax fields}}"><q></a><text>}</text><text>.</text><a link="sa_dt" hover="Data type for elements of vectors (field "size")"><dt></a><text> </text><a link="sa_qd" hover="128-bit SIMD&FP destination register (field "D:Vd")"><Qd></a><text>, </text><a link="sa_qm" hover="128-bit SIMD&FP source register (field "M:Vm")"><Qm></a></asmtemplate>
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</encoding>
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<ps_section howmany="1">
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<ps name="aarch32/instrs/VRINTA_asimd/T1_A.txt" mylink="aarch32.instrs.VRINTA_asimd.T1_A.txt" enclabels="" sections="1" secttype="noheading">
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<pstext mayhavelinks="1" section="Decode" rep_section="decode">if op<2> != op<0> then SEE "Related encodings";
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if <a link="impl-aarch32.InITBlock.0" file="shared_pseudocode.xml" hover="function: boolean InITBlock()">InITBlock</a>() then UNPREDICTABLE;
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if Q == '1' && (Vd<0> == '1' || Vm<0> == '1') then UNDEFINED;
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if (size == '01' && !<a link="impl-shared.HaveFP16Ext.0" file="shared_pseudocode.xml" hover="function: boolean HaveFP16Ext()">HaveFP16Ext</a>()) || size IN {'00', '11'} then UNDEFINED;
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// Rounding encoded differently from other VCVT and VRINT instructions
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rounding = <a link="impl-shared.FPDecodeRM.1" file="shared_pseudocode.xml" hover="function: FPRounding FPDecodeRM(bits(2) rm)">FPDecodeRM</a>(op<2>:NOT(op<1>)); exact = FALSE;
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integer esize;
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integer elements;
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case size of
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when '01' esize = 16; elements = 4;
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when '10' esize = 32; elements = 2;
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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); regs = if Q == '0' then 1 else 2;</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="VRINTP_asimd_A1_Q, VRINTP_asimd_T1_Q" 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="VRINTP_asimd_A1_Q, VRINTP_asimd_T1_Q" symboldefcount="1">
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<symbol link="sa_dt"><dt></symbol>
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<definition encodedin="size">
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<intro>Is the data type for the elements of the vectors, </intro>
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<table class="valuetable">
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<tgroup cols="2">
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<thead>
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<row>
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<entry class="bitfield">size</entry>
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<entry class="symbol"><dt></entry>
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</row>
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</thead>
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<tbody>
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<row>
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<entry class="bitfield">01</entry>
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<entry class="symbol">F16</entry>
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</row>
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<row>
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<entry class="bitfield">10</entry>
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<entry class="symbol">F32</entry>
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</row>
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</tbody>
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</tgroup>
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</table>
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</definition>
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<arch_variants>
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<arch_variant name="ARMv8.2-A" />
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</arch_variants>
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</explanation>
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<explanation enclist="VRINTP_asimd_A1_Q, VRINTP_asimd_T1_Q" symboldefcount="1">
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<symbol link="sa_qd"><Qd></symbol>
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<account encodedin="D:Vd">
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<intro>
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<para>Is the 128-bit name of the SIMD&FP destination register, encoded in the "D:Vd" field as <Qd>*2.</para>
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</intro>
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</account>
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</explanation>
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<explanation enclist="VRINTP_asimd_A1_Q, VRINTP_asimd_T1_Q" symboldefcount="1">
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<symbol link="sa_qm"><Qm></symbol>
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<account encodedin="M:Vm">
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<intro>
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<para>Is the 128-bit name of the SIMD&FP source register, encoded in the "M:Vm" field as <Qm>*2.</para>
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</intro>
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</account>
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</explanation>
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<explanation enclist="VRINTP_asimd_A1_D, VRINTP_asimd_T1_D" symboldefcount="1">
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<symbol link="sa_dd"><Dd></symbol>
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<account encodedin="D:Vd">
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<intro>
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<para>Is the 64-bit name of the SIMD&FP destination register, encoded in the "D:Vd" field.</para>
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</intro>
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</account>
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</explanation>
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<explanation enclist="VRINTP_asimd_A1_D, VRINTP_asimd_T1_D" symboldefcount="1">
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<symbol link="sa_dm"><Dm></symbol>
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<account encodedin="M:Vm">
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<intro>
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<para>Is the 64-bit name of the SIMD&FP source register, encoded in the "M:Vm" field.</para>
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</intro>
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</account>
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</explanation>
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</explanations>
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<ps_section howmany="1">
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<ps name="aarch32/instrs/VRINTA_asimd/Op_A.txt" mylink="execute" enclabels="" sections="1" secttype="Operation">
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<pstext mayhavelinks="1" section="Execute" rep_section="execute">EncodingSpecificOperations(); <a link="impl-aarch32.CheckAdvSIMDEnabled.0" file="shared_pseudocode.xml" hover="function: CheckAdvSIMDEnabled()">CheckAdvSIMDEnabled</a>();
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for r = 0 to regs-1
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for e = 0 to elements-1
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op1 = <a link="impl-shared.Elem.read.3" file="shared_pseudocode.xml" hover="accessor: bits(size) Elem[bits(N) vector, integer e, integer size]">Elem</a>[<a link="impl-aarch32.D.read.1" file="shared_pseudocode.xml" hover="accessor: bits(64) D[integer n]">D</a>[m+r],e,esize];
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result = <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>(op1, <a link="impl-aarch32.StandardFPSCRValue.0" file="shared_pseudocode.xml" hover="function: FPCRType StandardFPSCRValue()">StandardFPSCRValue</a>(), rounding, exact);
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<a link="impl-shared.Elem.write.3" file="shared_pseudocode.xml" hover="accessor: Elem[bits(N) &vector, integer e, integer size] = bits(size) value">Elem</a>[<a link="impl-aarch32.D.write.1" file="shared_pseudocode.xml" hover="accessor: D[integer n] = bits(64) value">D</a>[d+r],e,esize] = result;</pstext>
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</ps>
|
|
</ps_section>
|
|
</instructionsection>
|