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XPACD, XPACI, XPACLRI -- A64

XPACD, XPACI, XPACLRI

Strip Pointer Authentication Code

This instruction removes the Pointer Authentication Code from an address. The address is in the specified general-purpose register for XPACI and XPACD, and is in LR for XPACLRI.

The XPACD instruction is used for data addresses, and XPACI and XPACLRI are used for instruction addresses.

It has encodings from 2 classes: Integer and System

Integer
(FEAT_PAuth)

313029282726252423222120191817161514131211109876543210
110110101100000101000D11111Rd
sfSopcode2Rn

Encoding for the XPACD variant

Applies when (D == 1)

XPACD <Xd>

Encoding for the XPACI variant

Applies when (D == 0)

XPACI <Xd>

Decode for all variants of this encoding

if !IsFeatureImplemented(FEAT_PAuth) then EndOfDecode(Decode_UNDEF); end; let d : integer{} = UInt(Rd); let data : boolean = (D == '1');

System
(FEAT_PAuth)

313029282726252423222120191817161514131211109876543210
11010101000000110010000011111111
CRmop2

Encoding

XPACLRI

Decode for this encoding

if !IsFeatureImplemented(FEAT_PAuth) then EndOfDecode(Decode_NOP); end; let d : integer = 30; let data : boolean = FALSE;

Assembler Symbols


2025-09_rel_asl1 2026-03-12 12:57:38

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