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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
(Armv8.3)

313029282726252423222120191817161514131211109876543210
110110101100000101000D11111Rd
Rn

XPACD (D == 1)

XPACD <Xd>

XPACI (D == 0)

XPACI <Xd>

boolean data = (D == '1');
integer d = UInt(Rd);

if !HavePACExt() then
    UNDEFINED;

System
(Armv8.3)

313029282726252423222120191817161514131211109876543210
11010101000000110010000011111111

System

XPACLRI

integer d = 30;
boolean data = FALSE;

Assembler Symbols

<Xd>

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

Operation

if HavePACExt() then
    X[d] = Strip(X[d], data);
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