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DC

Data Cache operation. For more information, see op0==0b01, cache maintenance, TLB maintenance, and address translation instructions.

This is an alias of SYS. This means:

313029282726252423222120191817161514131211109876543210
1101010100001op10111CRmop2Rt
LCRn

System

DC <dc_op>, <Xt>

is equivalent to

SYS #<op1>, C7, <Cm>, #<op2>, <Xt>

and is the preferred disassembly when SysOp(op1,'0111',CRm,op2) == Sys_DC.

Assembler Symbols

<dc_op> Is a DC instruction name, as listed for the DC system instruction group, encoded in op1:CRm:op2:
op1CRmop2<dc_op>Architectural Feature
0000110001IVAC -
0000110010ISW -
0000110011IGVAC ARMv8.5-MemTag
0000110100IGSW ARMv8.5-MemTag
0000110101IGDVAC ARMv8.5-MemTag
0000110110IGDSW ARMv8.5-MemTag
0001010010CSW -
0001010100CGSW ARMv8.5-MemTag
0001010110CGDSW ARMv8.5-MemTag
0001110010CISW -
0001110100CIGSW ARMv8.5-MemTag
0001110110CIGDSW ARMv8.5-MemTag
0110100001ZVA -
0110100011GVA ARMv8.5-MemTag
0110100100GZVA ARMv8.5-MemTag
0111010001CVAC -
0111010011CGVAC ARMv8.5-MemTag
0111010101CGDVAC ARMv8.5-MemTag
0111011001CVAU -
0111100001CVAP ARMv8.2-DCPoP
0111100011CGVAP ARMv8.5-MemTag
0111100101CGDVAP ARMv8.5-MemTag
0111101001CVADP ARMv8.2-DCCVADP
0111101011CGVADP ARMv8.5-MemTag
0111101101CGDVADP ARMv8.5-MemTag
0111110001CIVAC -
0111110011CIGVAC ARMv8.5-MemTag
0111110101CIGDVAC ARMv8.5-MemTag
<op1>

Is a 3-bit unsigned immediate, in the range 0 to 7, encoded in the "op1" field.

<Cm>

Is a name 'Cm', with 'm' in the range 0 to 15, encoded in the "CRm" field.

<op2>

Is a 3-bit unsigned immediate, in the range 0 to 7, encoded in the "op2" field.

<Xt>

Is the 64-bit name of the general-purpose source register, encoded in the "Rt" field.

Operation

The description of SYS gives the operational pseudocode for this instruction.


Internal version only: isa v30.44v30.42, AdvSIMD v27.08, pseudocode v8.5-2019-06_rc2-5-g22901f2future-20190403, sve v2019-06_rc4v8.5-00bet10_rc5 ; Build timestamp: 2019-06-26T222019-04-17T09:0458

Copyright © 2010-2019 Arm Limited or its affiliates. All rights reserved. This document is Non-Confidential.

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