GCSPOPM

Guarded Control Stack pop

This instruction loads the 64-bit doubleword that is pointed to by the current GCS pointer register, writes it to the destination register, and increments the current GCS pointer register by the size of a GCS procedure return record.

For more information, see GCSPOPM, Guarded Control Stack Pop.

This is an alias of SYSL. This means:

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

System class

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

Encoding

GCSPOPM {<Xt>}

is equivalent to

SYSL <Xt>, #3, C7, C7, #1

and is always the preferred disassembly.

Assembler Symbols

<Xt>	Is the 64-bit name of the optional general-purpose destination register, encoded in the "Rt" field. Defaults to XZR if absent.

Operation

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

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

GCSPOPM

System class (FEAT_GCS)

Encoding

Assembler Symbols

Operation

System class

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