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Pointer Authentication Code for Instruction address, using key A. This instruction computes and inserts a pointer authentication code for an instruction address, using a modifier and key A.
The address is:
The modifier is:
It has encodings from 2 classes: Integer and System
31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
1 | 1 | 0 | 1 | 1 | 0 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | Z | 0 | 0 | 0 | Rn | Rd |
PACIZA <Xd>
boolean source_is_sp = FALSE; integer d = UInt(Rd); integer n = UInt(Rn); if !HavePACExt() then UNDEFINED; if Z == '0' then // PACIA if n == 31 then source_is_sp = TRUE; else // PACIZA if n != 31 then UNDEFINED;
31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
1 | 1 | 0 | 1 | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | x | 1 | 0 | 0 | x | 1 | 1 | 1 | 1 | 1 |
CRm | op2 |
integer d;
integer n;
boolean source_is_sp = FALSE;
case CRm:op2 of
when '0011 000' // PACIAZ
d = 30;
n = 31;
when '0011 001' // PACIASP
d = 30;
source_is_sp = TRUE;
if HaveBTIExt() then
// Check for branch target compatibility between PSTATE.BTYPE
// and implicit branch target of PACIASP instruction.
- = BTypeCompatible = BTypeCompatible_PACIXSP();
when '0001 000' // PACIA1716
d = 17;
n = 16;
when '0001 010' SEE "PACIB";
when '0001 100' SEE "AUTIA";
when '0001 110' SEE "AUTIB";
when '0011 01x' SEE "PACIB";
when '0011 10x' SEE "AUTIA";
when '0011 11x' SEE "AUTIB";
when '0000 111' SEE "XPACLRI";
<Xd> | Is the 64-bit name of the general-purpose destination register, encoded in the "Rd" field. |
<Xn|SP> | Is the 64-bit name of the general-purpose source register or stack pointer, encoded in the "Rn" field. |
if HavePACExt() then if source_is_sp then X[d] = AddPACIA(X[d], SP[]); else X[d] = AddPACIA(X[d], X[n]);
Internal version only: isa v30.44, AdvSIMD v27.08, pseudocode v8.5-2019-06_rc2-5-g22901f2, sve v2019-06_rc4
; Build timestamp: 2019-06-26T22:3004
Copyright © 2010-2019 Arm Limited or its affiliates. All rights reserved. This document is Non-Confidential.
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