mirror of
https://github.com/pound-emu/ballistic.git
synced 2026-01-31 01:15:21 +01:00
143 lines
7.7 KiB
XML
143 lines
7.7 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
|
|
<?xml-stylesheet type="text/xsl" encoding="UTF-8" href="iform.xsl" version="1.0"?>
|
|
<!DOCTYPE instructionsection PUBLIC "-//ARM//DTD instructionsection //EN" "iform-p.dtd">
|
|
<!-- Copyright (c) 2010-2022 Arm Limited or its affiliates. All rights reserved. -->
|
|
<!-- 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. -->
|
|
|
|
<instructionsection id="urecpe_z_p_z" title="URECPE" type="instruction">
|
|
<docvars>
|
|
<docvar key="instr-class" value="sve2" />
|
|
<docvar key="isa" value="A64" />
|
|
<docvar key="mnemonic" value="URECPE" />
|
|
</docvars>
|
|
<heading>URECPE</heading>
|
|
<desc>
|
|
<brief>Unsigned reciprocal estimate (predicated)</brief>
|
|
<description>
|
|
<para>Find the approximate reciprocal of each active unsigned element of the source vector, and place the results in the corresponding elements of the destination vector. Inactive elements in the destination vector register remain unmodified.</para>
|
|
</description>
|
|
<status>Green</status>
|
|
<predicated>True</predicated>
|
|
<takes_movprfx>True</takes_movprfx>
|
|
<takes_pred_movprfx>True</takes_pred_movprfx>
|
|
</desc>
|
|
<alias_list howmany="0"></alias_list>
|
|
<classes>
|
|
<iclass name="SVE2" oneof="1" id="iclass_sve2" no_encodings="1" isa="A64">
|
|
<docvars>
|
|
<docvar key="instr-class" value="sve2" />
|
|
<docvar key="isa" value="A64" />
|
|
<docvar key="mnemonic" value="URECPE" />
|
|
</docvars>
|
|
<iclassintro count="1"></iclassintro>
|
|
<regdiagram form="32" psname="URECPE-Z.P.Z-_" tworows="1">
|
|
<box hibit="31" width="8" settings="8">
|
|
<c>0</c>
|
|
<c>1</c>
|
|
<c>0</c>
|
|
<c>0</c>
|
|
<c>0</c>
|
|
<c>1</c>
|
|
<c>0</c>
|
|
<c>0</c>
|
|
</box>
|
|
<box hibit="23" width="2" name="size" usename="1">
|
|
<c colspan="2"></c>
|
|
</box>
|
|
<box hibit="21" width="2" settings="2">
|
|
<c>0</c>
|
|
<c>0</c>
|
|
</box>
|
|
<box hibit="19" name="Q" usename="1" settings="1">
|
|
<c>0</c>
|
|
</box>
|
|
<box hibit="18" settings="1">
|
|
<c>0</c>
|
|
</box>
|
|
<box hibit="17" name="opc<1>" settings="1">
|
|
<c>0</c>
|
|
</box>
|
|
<box hibit="16" name="opc<0>" settings="1">
|
|
<c>0</c>
|
|
</box>
|
|
<box hibit="15" width="3" settings="3">
|
|
<c>1</c>
|
|
<c>0</c>
|
|
<c>1</c>
|
|
</box>
|
|
<box hibit="12" width="3" name="Pg" usename="1">
|
|
<c colspan="3"></c>
|
|
</box>
|
|
<box hibit="9" width="5" name="Zn" usename="1">
|
|
<c colspan="5"></c>
|
|
</box>
|
|
<box hibit="4" width="5" name="Zd" usename="1">
|
|
<c colspan="5"></c>
|
|
</box>
|
|
</regdiagram>
|
|
<encoding name="urecpe_z_p_z_" oneofinclass="1" oneof="1" label="">
|
|
<docvars>
|
|
<docvar key="instr-class" value="sve2" />
|
|
<docvar key="isa" value="A64" />
|
|
<docvar key="mnemonic" value="URECPE" />
|
|
</docvars>
|
|
<asmtemplate><text>URECPE </text><a link="sa_zd" hover="Destination scalable vector register (field "Zd")"><Zd></a><text>.S, </text><a link="sa_pg" hover="Governing scalable predicate register P0-P7 (field "Pg")"><Pg></a><text>/M, </text><a link="sa_zn" hover="Source scalable vector register (field "Zn")"><Zn></a><text>.S</text></asmtemplate>
|
|
</encoding>
|
|
<ps_section howmany="1">
|
|
<ps name="URECPE-Z.P.Z-_" mylink="URECPE-Z.P.Z-_" enclabels="" sections="1" secttype="noheading">
|
|
<pstext mayhavelinks="1" section="Decode" rep_section="decode">if !<a link="impl-aarch64.HaveSVE2.0" file="shared_pseudocode.xml" hover="function: boolean HaveSVE2()">HaveSVE2</a>() && !<a link="impl-aarch64.HaveSME.0" file="shared_pseudocode.xml" hover="function: boolean HaveSME()">HaveSME</a>() then UNDEFINED;
|
|
if size != '10' then UNDEFINED;
|
|
constant integer esize = 32;
|
|
integer g = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(Pg);
|
|
integer n = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(Zn);
|
|
integer d = <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(Zd);</pstext>
|
|
</ps>
|
|
</ps_section>
|
|
</iclass>
|
|
</classes>
|
|
<explanations scope="all">
|
|
<explanation enclist="urecpe_z_p_z_" symboldefcount="1">
|
|
<symbol link="sa_zd"><Zd></symbol>
|
|
<account encodedin="Zd">
|
|
<intro>
|
|
<para>Is the name of the destination scalable vector register, encoded in the "Zd" field.</para>
|
|
</intro>
|
|
</account>
|
|
</explanation>
|
|
<explanation enclist="urecpe_z_p_z_" symboldefcount="1">
|
|
<symbol link="sa_pg"><Pg></symbol>
|
|
<account encodedin="Pg">
|
|
<intro>
|
|
<para>Is the name of the governing scalable predicate register P0-P7, encoded in the "Pg" field.</para>
|
|
</intro>
|
|
</account>
|
|
</explanation>
|
|
<explanation enclist="urecpe_z_p_z_" symboldefcount="1">
|
|
<symbol link="sa_zn"><Zn></symbol>
|
|
<account encodedin="Zn">
|
|
<intro>
|
|
<para>Is the name of the source scalable vector register, encoded in the "Zn" field.</para>
|
|
</intro>
|
|
</account>
|
|
</explanation>
|
|
</explanations>
|
|
<ps_section howmany="1">
|
|
<ps name="URECPE-Z.P.Z-_" mylink="execute" enclabels="" sections="1" secttype="Operation">
|
|
<pstext mayhavelinks="1" section="Execute" rep_section="execute"><a link="impl-aarch64.CheckSVEEnabled.0" file="shared_pseudocode.xml" hover="function: CheckSVEEnabled()">CheckSVEEnabled</a>();
|
|
constant integer VL = <a link="impl-aarch64.CurrentVL.read.none" file="shared_pseudocode.xml" hover="accessor: integer CurrentVL">CurrentVL</a>;
|
|
constant integer PL = VL DIV 8;
|
|
constant integer elements = VL DIV esize;
|
|
bits(PL) mask = <a link="impl-aarch64.P.read.2" file="shared_pseudocode.xml" hover="accessor: bits(width) P[integer n, integer width]">P</a>[g, PL];
|
|
bits(VL) operand = if <a link="impl-aarch64.AnyActiveElement.2" file="shared_pseudocode.xml" hover="function: boolean AnyActiveElement(bits(N) mask, integer esize)">AnyActiveElement</a>(mask, esize) then <a link="impl-aarch64.Z.read.2" file="shared_pseudocode.xml" hover="accessor: bits(width) Z[integer n, integer width]">Z</a>[n, VL] else <a link="impl-shared.Zeros.1" file="shared_pseudocode.xml" hover="function: bits(N) Zeros(integer N)">Zeros</a>(VL);
|
|
bits(VL) result = <a link="impl-aarch64.Z.read.2" file="shared_pseudocode.xml" hover="accessor: bits(width) Z[integer n, integer width]">Z</a>[d, VL];
|
|
|
|
for e = 0 to elements-1
|
|
if <a link="impl-aarch64.ActivePredicateElement.3" file="shared_pseudocode.xml" hover="function: boolean ActivePredicateElement(bits(N) pred, integer e, integer esize)">ActivePredicateElement</a>(mask, e, esize) then
|
|
bits(esize) element = <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>[operand, e, esize];
|
|
<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>[result, e, esize] = <a link="impl-shared.UnsignedRecipEstimate.1" file="shared_pseudocode.xml" hover="function: bits(N) UnsignedRecipEstimate(bits(N) operand)">UnsignedRecipEstimate</a>(element);
|
|
|
|
<a link="impl-aarch64.Z.write.2" file="shared_pseudocode.xml" hover="accessor: Z[integer n, integer width] = bits(width) value">Z</a>[d, VL] = result;</pstext>
|
|
</ps>
|
|
</ps_section>
|
|
</instructionsection>
|