mirror of
https://github.com/pound-emu/ballistic.git
synced 2026-01-31 01:15:21 +01:00
199 lines
11 KiB
XML
199 lines
11 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="SBFX_SBFM" title="SBFX -- A64" type="alias">
|
|
<docvars>
|
|
<docvar key="alias_mnemonic" value="SBFX" />
|
|
<docvar key="bitfield-fill" value="signed-fill" />
|
|
<docvar key="instr-class" value="general" />
|
|
<docvar key="isa" value="A64" />
|
|
<docvar key="mnemonic" value="SBFM" />
|
|
<docvar key="source-type" value="src-is-immediate" />
|
|
</docvars>
|
|
<heading>SBFX</heading>
|
|
<desc>
|
|
<brief>
|
|
<para>Signed Bitfield Extract</para>
|
|
</brief>
|
|
<authored>
|
|
<para>Signed Bitfield Extract copies a bitfield of <syntax><width></syntax> bits starting from bit position <syntax><lsb></syntax> in the source register to the least significant bits of the destination register, and sets destination bits above the bitfield to a copy of the most significant bit of the bitfield.</para>
|
|
</authored>
|
|
</desc>
|
|
<operationalnotes>
|
|
<para>If PSTATE.DIT is 1:</para>
|
|
<list type="unordered">
|
|
<listitem><content>The execution time of this instruction is independent of:<list type="unordered"><listitem><content>The values of the data supplied in any of its registers.</content></listitem><listitem><content>The values of the NZCV flags.</content></listitem></list></content></listitem>
|
|
<listitem><content>The response of this instruction to asynchronous exceptions does not vary based on:<list type="unordered"><listitem><content>The values of the data supplied in any of its registers.</content></listitem><listitem><content>The values of the NZCV flags.</content></listitem></list></content></listitem>
|
|
</list>
|
|
</operationalnotes>
|
|
<aliasto refiform="sbfm.xml" iformid="SBFM">SBFM</aliasto>
|
|
<classes>
|
|
<iclass name="With sign replication to left and zeros to right" oneof="1" id="iclass_signed_fill" no_encodings="2" isa="A64">
|
|
<docvars>
|
|
<docvar key="bitfield-fill" value="signed-fill" />
|
|
<docvar key="instr-class" value="general" />
|
|
<docvar key="isa" value="A64" />
|
|
<docvar key="mnemonic" value="SBFM" />
|
|
</docvars>
|
|
<iclassintro count="2"></iclassintro>
|
|
<regdiagram form="32" psname="aarch64/instrs/integer/bitfield" tworows="1">
|
|
<box hibit="31" name="sf" usename="1">
|
|
<c></c>
|
|
</box>
|
|
<box hibit="30" width="2" name="opc" usename="1" settings="2" psbits="xx">
|
|
<c>0</c>
|
|
<c>0</c>
|
|
</box>
|
|
<box hibit="28" width="6" settings="6">
|
|
<c>1</c>
|
|
<c>0</c>
|
|
<c>0</c>
|
|
<c>1</c>
|
|
<c>1</c>
|
|
<c>0</c>
|
|
</box>
|
|
<box hibit="22" name="N" usename="1">
|
|
<c></c>
|
|
</box>
|
|
<box hibit="21" width="6" name="immr" usename="1">
|
|
<c colspan="6"></c>
|
|
</box>
|
|
<box hibit="15" width="6" name="imms" usename="1">
|
|
<c colspan="6"></c>
|
|
</box>
|
|
<box hibit="9" width="5" name="Rn" usename="1">
|
|
<c colspan="5"></c>
|
|
</box>
|
|
<box hibit="4" width="5" name="Rd" usename="1">
|
|
<c colspan="5"></c>
|
|
</box>
|
|
</regdiagram>
|
|
<encoding name="SBFX_SBFM_32M_bitfield" oneofinclass="2" oneof="2" label="32-bit" bitdiffs="sf == 0 && N == 0">
|
|
<docvars>
|
|
<docvar key="alias_mnemonic" value="SBFX" />
|
|
<docvar key="bitfield-fill" value="signed-fill" />
|
|
<docvar key="datatype" value="32" />
|
|
<docvar key="instr-class" value="general" />
|
|
<docvar key="isa" value="A64" />
|
|
<docvar key="mnemonic" value="SBFM" />
|
|
<docvar key="source-type" value="src-is-immediate" />
|
|
</docvars>
|
|
<box hibit="31" width="1" name="sf">
|
|
<c>0</c>
|
|
</box>
|
|
<box hibit="22" width="1" name="N">
|
|
<c>0</c>
|
|
</box>
|
|
<asmtemplate><text>SBFX </text><a link="sa_wd" hover="32-bit general-purpose destination register (field "Rd")"><Wd></a><text>, </text><a link="sa_wn" hover="32-bit general-purpose source register (field "Rn")"><Wn></a><text>, #</text><a link="sa_lsb_1" hover="Bit number of lsb of the source bitfield [0-31]"><lsb></a><text>, #</text><a link="sa_width" hover="Width of bitfield [1-32-<lsb>]"><width></a></asmtemplate>
|
|
<equivalent_to>
|
|
<asmtemplate><a href="sbfm.xml#SBFM_32M_bitfield">SBFM</a><text> </text><a link="sa_wd" hover="32-bit general-purpose destination register (field "Rd")"><Wd></a><text>, </text><a link="sa_wn" hover="32-bit general-purpose source register (field "Rn")"><Wn></a><text>, #</text><a link="sa_lsb_1" hover="Bit number of lsb of the source bitfield [0-31]"><lsb></a><text>, #(</text><a link="sa_lsb_1" hover="Bit number of lsb of the source bitfield [0-31]"><lsb></a><text>+</text><a link="sa_width" hover="Width of bitfield [1-32-<lsb>]"><width></a><text>-1)</text></asmtemplate>
|
|
<aliascond><a link="impl-aarch64.BFXPreferred.4" file="shared_pseudocode.xml" hover="function: boolean BFXPreferred(bit sf, bit uns, bits(6) imms, bits(6) immr)">BFXPreferred</a>(sf, opc<1>, imms, immr)</aliascond>
|
|
</equivalent_to>
|
|
</encoding>
|
|
<encoding name="SBFX_SBFM_64M_bitfield" oneofinclass="2" oneof="2" label="64-bit" bitdiffs="sf == 1 && N == 1">
|
|
<docvars>
|
|
<docvar key="alias_mnemonic" value="SBFX" />
|
|
<docvar key="bitfield-fill" value="signed-fill" />
|
|
<docvar key="datatype" value="64" />
|
|
<docvar key="instr-class" value="general" />
|
|
<docvar key="isa" value="A64" />
|
|
<docvar key="mnemonic" value="SBFM" />
|
|
<docvar key="source-type" value="src-is-immediate" />
|
|
</docvars>
|
|
<box hibit="31" width="1" name="sf">
|
|
<c>1</c>
|
|
</box>
|
|
<box hibit="22" width="1" name="N">
|
|
<c>1</c>
|
|
</box>
|
|
<asmtemplate><text>SBFX </text><a link="sa_xd" hover="64-bit general-purpose destination register (field "Rd")"><Xd></a><text>, </text><a link="sa_xn" hover="64-bit general-purpose source register (field "Rn")"><Xn></a><text>, #</text><a link="sa_lsb_3" hover="Bit number of lsb of the source bitfield [0-63]"><lsb></a><text>, #</text><a link="sa_width_1" hover="Width of bitfield [1-64-<lsb>]"><width></a></asmtemplate>
|
|
<equivalent_to>
|
|
<asmtemplate><a href="sbfm.xml#SBFM_64M_bitfield">SBFM</a><text> </text><a link="sa_xd" hover="64-bit general-purpose destination register (field "Rd")"><Xd></a><text>, </text><a link="sa_xn" hover="64-bit general-purpose source register (field "Rn")"><Xn></a><text>, #</text><a link="sa_lsb_3" hover="Bit number of lsb of the source bitfield [0-63]"><lsb></a><text>, #(</text><a link="sa_lsb_3" hover="Bit number of lsb of the source bitfield [0-63]"><lsb></a><text>+</text><a link="sa_width_1" hover="Width of bitfield [1-64-<lsb>]"><width></a><text>-1)</text></asmtemplate>
|
|
<aliascond><a link="impl-aarch64.BFXPreferred.4" file="shared_pseudocode.xml" hover="function: boolean BFXPreferred(bit sf, bit uns, bits(6) imms, bits(6) immr)">BFXPreferred</a>(sf, opc<1>, imms, immr)</aliascond>
|
|
</equivalent_to>
|
|
</encoding>
|
|
</iclass>
|
|
</classes>
|
|
<explanations scope="all">
|
|
<explanation enclist="SBFX_SBFM_32M_bitfield" symboldefcount="1">
|
|
<symbol link="sa_wd"><Wd></symbol>
|
|
<account encodedin="Rd">
|
|
<intro>
|
|
<para>Is the 32-bit name of the general-purpose destination register, encoded in the "Rd" field.</para>
|
|
</intro>
|
|
</account>
|
|
</explanation>
|
|
<explanation enclist="SBFX_SBFM_32M_bitfield" symboldefcount="1">
|
|
<symbol link="sa_wn"><Wn></symbol>
|
|
<account encodedin="Rn">
|
|
<intro>
|
|
<para>Is the 32-bit name of the general-purpose source register, encoded in the "Rn" field.</para>
|
|
</intro>
|
|
</account>
|
|
</explanation>
|
|
<explanation enclist="SBFX_SBFM_64M_bitfield" symboldefcount="1">
|
|
<symbol link="sa_xd"><Xd></symbol>
|
|
<account encodedin="Rd">
|
|
<intro>
|
|
<para>Is the 64-bit name of the general-purpose destination register, encoded in the "Rd" field.</para>
|
|
</intro>
|
|
</account>
|
|
</explanation>
|
|
<explanation enclist="SBFX_SBFM_64M_bitfield" symboldefcount="1">
|
|
<symbol link="sa_xn"><Xn></symbol>
|
|
<account encodedin="Rn">
|
|
<intro>
|
|
<para>Is the 64-bit name of the general-purpose source register, encoded in the "Rn" field.</para>
|
|
</intro>
|
|
</account>
|
|
</explanation>
|
|
<explanation enclist="SBFX_SBFM_32M_bitfield" symboldefcount="1">
|
|
<symbol link="sa_lsb_1"><lsb></symbol>
|
|
<account encodedin="">
|
|
<docvars>
|
|
<docvar key="datatype" value="32" />
|
|
</docvars>
|
|
<intro>
|
|
<para>For the 32-bit variant: is the bit number of the lsb of the source bitfield, in the range 0 to 31.</para>
|
|
</intro>
|
|
</account>
|
|
</explanation>
|
|
<explanation enclist="SBFX_SBFM_64M_bitfield" symboldefcount="2">
|
|
<symbol link="sa_lsb_3"><lsb></symbol>
|
|
<account encodedin="">
|
|
<docvars>
|
|
<docvar key="datatype" value="64" />
|
|
</docvars>
|
|
<intro>
|
|
<para>For the 64-bit variant: is the bit number of the lsb of the source bitfield, in the range 0 to 63.</para>
|
|
</intro>
|
|
</account>
|
|
</explanation>
|
|
<explanation enclist="SBFX_SBFM_32M_bitfield" symboldefcount="1">
|
|
<symbol link="sa_width"><width></symbol>
|
|
<account encodedin="">
|
|
<docvars>
|
|
<docvar key="datatype" value="32" />
|
|
</docvars>
|
|
<intro>
|
|
<para>For the 32-bit variant: is the width of the bitfield, in the range 1 to 32-<lsb>.</para>
|
|
</intro>
|
|
</account>
|
|
</explanation>
|
|
<explanation enclist="SBFX_SBFM_64M_bitfield" symboldefcount="2">
|
|
<symbol link="sa_width_1"><width></symbol>
|
|
<account encodedin="">
|
|
<docvars>
|
|
<docvar key="datatype" value="64" />
|
|
</docvars>
|
|
<intro>
|
|
<para>For the 64-bit variant: is the width of the bitfield, in the range 1 to 64-<lsb>.</para>
|
|
</intro>
|
|
</account>
|
|
</explanation>
|
|
</explanations>
|
|
</instructionsection>
|