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https://github.com/pound-emu/ballistic.git
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173 lines
9.3 KiB
XML
173 lines
9.3 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="ftsmul_z_zz" title="FTSMUL" type="instruction">
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<docvars>
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<docvar key="instr-class" value="sve" />
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<docvar key="isa" value="A64" />
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<docvar key="mnemonic" value="FTSMUL" />
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</docvars>
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<heading>FTSMUL</heading>
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<desc>
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<brief>Floating-point trigonometric starting value</brief>
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<description>
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<para>The <instruction>FTSMUL</instruction> instruction calculates the initial value for the <instruction>FTMAD</instruction> instruction. The instruction squares each element in the first source vector and then sets the sign bit to a copy of bit 0 of the corresponding element in the second source register, and places the results in the destination vector. This instruction is unpredicated.</para>
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<para>To compute <arm-defined-word>sin(x)</arm-defined-word> or <arm-defined-word>cos(x)</arm-defined-word> the instruction is executed with elements of the first source vector set to <arm-defined-word>x</arm-defined-word>, adjusted to be in the range -π/4 < <arm-defined-word>x</arm-defined-word> ≤ π/4.</para>
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<para>The elements of the second source vector hold the corresponding value of the quadrant <arm-defined-word>q</arm-defined-word> number as an integer not a floating-point value. The value <arm-defined-word>q</arm-defined-word> satisfies the relationship (2q-1) × π/4 < <arm-defined-word>x</arm-defined-word> ≤ (2q+1) × π/4.</para>
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<para>This instruction is illegal when executed in Streaming SVE mode, unless FEAT_SME_FA64 is implemented and enabled.</para>
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</description>
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<status>Green</status>
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<predicated>False</predicated>
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<sm_policy>SM_0_only</sm_policy>
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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="SVE" oneof="1" id="iclass_sve" no_encodings="1" isa="A64">
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<docvars>
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<docvar key="instr-class" value="sve" />
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<docvar key="isa" value="A64" />
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<docvar key="mnemonic" value="FTSMUL" />
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</docvars>
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<iclassintro count="1"></iclassintro>
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<regdiagram form="32" psname="FTSMUL-Z.ZZ-_">
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<box hibit="31" width="8" settings="8">
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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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<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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</box>
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<box hibit="23" 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="21" settings="1">
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<c>0</c>
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</box>
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<box hibit="20" width="5" name="Zm" usename="1">
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<c colspan="5"></c>
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</box>
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<box hibit="15" width="3" 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="12" width="2" name="opc<2:1>" settings="2">
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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="10" name="opc<0>" settings="1">
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<c>1</c>
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</box>
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<box hibit="9" width="5" name="Zn" 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="Zd" 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="ftsmul_z_zz_" oneofinclass="1" oneof="1" label="">
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<docvars>
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<docvar key="instr-class" value="sve" />
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<docvar key="isa" value="A64" />
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<docvar key="mnemonic" value="FTSMUL" />
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</docvars>
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<asmtemplate><text>FTSMUL </text><a link="sa_zd" hover="Destination scalable vector register (field "Zd")"><Zd></a><text>.</text><a link="sa_t" hover="Size specifier (field "size") [D,H,S]"><T></a><text>, </text><a link="sa_zn" hover="First source scalable vector register (field "Zn")"><Zn></a><text>.</text><a link="sa_t" hover="Size specifier (field "size") [D,H,S]"><T></a><text>, </text><a link="sa_zm" hover="Second source scalable vector register (field "Zm")"><Zm></a><text>.</text><a link="sa_t" hover="Size specifier (field "size") [D,H,S]"><T></a></asmtemplate>
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</encoding>
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<ps_section howmany="1">
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<ps name="FTSMUL-Z.ZZ-_" mylink="FTSMUL-Z.ZZ-_" enclabels="" sections="1" secttype="noheading">
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<pstext mayhavelinks="1" section="Decode" rep_section="decode">if !<a link="impl-aarch64.HaveSVE.0" file="shared_pseudocode.xml" hover="function: boolean HaveSVE()">HaveSVE</a>() then UNDEFINED;
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if size == '00' then UNDEFINED;
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constant integer esize = 8 << <a link="impl-shared.UInt.1" file="shared_pseudocode.xml" hover="function: integer UInt(bits(N) x)">UInt</a>(size);
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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>(Zn);
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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>(Zm);
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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>(Zd);</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="ftsmul_z_zz_" symboldefcount="1">
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<symbol link="sa_zd"><Zd></symbol>
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<account encodedin="Zd">
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<intro>
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<para>Is the name of the destination scalable vector register, encoded in the "Zd" field.</para>
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</intro>
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</account>
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</explanation>
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<explanation enclist="ftsmul_z_zz_" symboldefcount="1">
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<symbol link="sa_t"><T></symbol>
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<definition encodedin="size">
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<intro>Is the size specifier, </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"><T></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">00</entry>
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<entry class="symbol">RESERVED</entry>
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</row>
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<row>
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<entry class="bitfield">01</entry>
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<entry class="symbol">H</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">S</entry>
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</row>
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<row>
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<entry class="bitfield">11</entry>
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<entry class="symbol">D</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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</explanation>
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<explanation enclist="ftsmul_z_zz_" symboldefcount="1">
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<symbol link="sa_zn"><Zn></symbol>
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<account encodedin="Zn">
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<intro>
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<para>Is the name of the first source scalable vector register, encoded in the "Zn" field.</para>
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</intro>
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</account>
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</explanation>
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<explanation enclist="ftsmul_z_zz_" symboldefcount="1">
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<symbol link="sa_zm"><Zm></symbol>
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<account encodedin="Zm">
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<intro>
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<para>Is the name of the second source scalable vector register, encoded in the "Zm" 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="FTSMUL-Z.ZZ-_" mylink="execute" enclabels="" sections="1" secttype="Operation">
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<pstext mayhavelinks="1" section="Execute" rep_section="execute"><a link="impl-aarch64.CheckNonStreamingSVEEnabled.0" file="shared_pseudocode.xml" hover="function: CheckNonStreamingSVEEnabled()">CheckNonStreamingSVEEnabled</a>();
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constant integer VL = <a link="impl-aarch64.CurrentVL.read.none" file="shared_pseudocode.xml" hover="accessor: integer CurrentVL">CurrentVL</a>;
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constant integer PL = VL DIV 8;
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constant integer elements = VL DIV esize;
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bits(VL) operand1 = <a link="impl-aarch64.Z.read.2" file="shared_pseudocode.xml" hover="accessor: bits(width) Z[integer n, integer width]">Z</a>[n, VL];
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bits(VL) operand2 = <a link="impl-aarch64.Z.read.2" file="shared_pseudocode.xml" hover="accessor: bits(width) Z[integer n, integer width]">Z</a>[m, VL];
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bits(VL) result;
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for e = 0 to elements-1
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bits(esize) element1 = <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>[operand1, e, esize];
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bits(esize) element2 = <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>[operand2, e, esize];
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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>[result, e, esize] = <a link="impl-aarch64.FPTrigSMul.3" file="shared_pseudocode.xml" hover="function: bits(N) FPTrigSMul(bits(N) op1, bits(N) op2, FPCRType fpcr)">FPTrigSMul</a>(element1, element2, FPCR[]);
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<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>
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</ps>
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</ps_section>
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</instructionsection>
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