Pointer Authentication Code for return address, using key B. This instruction computes and inserts a pointer authentication code for an instruction address, using two modifiers and key B.
The address is in X30.
The first modifier is in SP.
The second modifier is the 64-bit value of PC.
A PACIBSPPC instruction has an implicit BTI instruction. The implicit BTI instruction of a PACIBSPPC instruction is always compatible with PSTATE.BTYPE == 0b01 and PSTATE.BTYPE == 0b10. Controls in SCTLR_ELx configure whether the implicit BTI instruction of a PACIBSPPC instruction is compatible with PSTATE.BTYPE == 0b11. For more information, see PSTATE.BTYPE.
| 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 | 1 | 0 | 1 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 |
| sf | S | opcode2 | opcode | Rn | Rd | ||||||||||||||||||||||||||
if !IsFeatureImplemented(FEAT_PAuth_LR) then UNDEFINED; if IsFeatureImplemented(FEAT_BTI) then // Check for branch target compatibility between PSTATE.BTYPE // and implicit branch target of PACIxSPPC instruction. SetBTypeCompatible(BTypeCompatible_PACIXSP());
Internal version only: aarchmrs v2023-12_rel, pseudocode v2023-12_rel, sve v2023-12_rel ; Build timestamp: 2023-12-15T16:46
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