GCSPOPCX -- A64

GCSPOPCX

Guarded Control Stack Pop and Compare exception return record loads an exception return record from the location indicated by the current Guarded control stack pointer register, compares the loaded values with the current ELR_ELx, SPSR_ELx, and LR, and increments the pointer by the size of a Guarded control stack exception return record.

This is an alias of SYS. This means:

The encodings in this description are named to match the encodings of SYS.
The description of SYS gives the operational pseudocode, any constrained unpredictable behavior, and any operational information for this instruction.

System
(FEAT_GCS)

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	1	0	0	0	0	1	1	1	0	1	1	1	1	0	1	Rt
										L			op1			CRn				CRm				op2

GCSPOPCX
is equivalent to

SYS #0, C7, C7, #5{, <Xt>}

and is always the preferred disassembly.

Operation

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

Internal version only: aarchmrs v2024-03_relA, pseudocode v2024-03_rel, sve v2024-03_rel ; Build timestamp: 2024-03-26T09:45

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	1	0	0	0	0	1	1	1	0	1	1	1	1	0	1	Rt
										L			op1			CRn				CRm				op2

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	1	0	0	0	0	1	1	1	0	1	1	1	1	0	1	Rt
										L			op1			CRn				CRm				op2

GCSPOPCX

System(FEAT_GCS)

GCSPOPCX is equivalent to SYS #0, C7, C7, #5{, <Xt>} and is always the preferred disassembly.

Operation

System
(FEAT_GCS)

GCSPOPCX
is equivalent to

SYS #0, C7, C7, #5{, <Xt>}

and is always the preferred disassembly.

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	1	0	0	0	0	1	1	1	0	1	1	1	1	0	1	Rt
										L			op1			CRn				CRm				op2