Instruction Set Architecture¶

Section	Subsection	Specified instruction
Data processing - immediate	Arithmetic (immediate)	12
	Logical (immediate)	10
	Move (wide immediate)	6
	Move (immediate)	6
	PC-relative address calculation	2
	Extract register	2
Total:		38
Data processing - register	Arithmetic (shifted register)	12
	Arithmetic (extending register)	12
	Logical (shifted register)	20
	Move (register)	4
	Multiply and divide	18
	Divide	4
Total:		70
Branches, Exception generation, and System instructions	Conditional branch	7
	Unconditional branch (immediate)	2
	Unconditional branch (register)	3
	Exception generation and return	10
	System register instructions	6
	System instructions	8
	Hint instructions	7
	Barriers and CLREX instructions	4
Total:		47
Loads and stores	Load/store register	2
	Load-Exclusive/Store-Exclusive	12
	Load-Acquire/Store-Release	20
Total:		34

Data processing - immediate¶

Arithmetic (immediate)¶

1. ADD (immediate). Add.
   Specification: add, add_32
2. SUB (immediate). Subtract.
   Specification: sub, sub_32
3. ADDS (immediate). Add and set flags.
   Specification: adds, adds_32
4. SUBS (immediate). Subtract and set flags.
   Specification: subs, subs_32
5. CMP (immediate). Compare.
   Specification: cmp, cmp_32
6. CMN (immediate). Compare negative.
   Specification: cmn, cmn_32

Total: 12.

Logical (immediate)¶

1. AND (immediate). Bitwise AND
   Specification: and_bitmask, and_bitmask_32
2. ANDS (immediate). Bitwise AND and set flags
   Specification: ands_bitmask, ands_bitmask_32
3. EOR (immediate). Bitwise exclusive OR
   Specification: eor_bitmask, eor_bitmask_32
4. ORR (immediate). Bitwise inclusive OR
   Specification: orr_bitmask, orr_bitmask_32
5. TST (immediate). TST Test bits
   Specification: tst_bitmask, tst_bitmask_32

Total: 10.

Move (wide immediate)¶

1. MOVZ. Move wide with zero
   Specification: movz, movz_32
2. MOVN. Move wide with NOT
   Specification: movn, movn_32
3. MOVK. Move wide with keep
   Specification: movk, movk_32

Total: 6.

Move (immediate)¶

1. MOV (wide immediate). Move (wide immediate)
   Specification: mov_wide_imm, mov_wide_imm_32
2. MOV (inverted wide immediate). Move (inverted wide immediate)
   Specification: mov_inv_wide_imm, mov_inv_wide_imm_32
3. MOV (bitmask immediate). Move (bitmask immediate)
   Specification: mov_bitmask, mov_bitmask_32

Total: 6.

PC-relative address calculation¶

1. ADRP. Compute address of 4KB page at a PC-relative offset
   Specification: adrp
2. ADR. Compute address of label at a PC-relative offset.
   Specification: adr

Total: 2.

Extract register¶

1. EXTR. Extract register from pair
   Specification: extr, extr_32

Total: 2.

Data processing - register¶

Arithmetic (shifted register)¶

1. ADD (shifted register). Add
   Specification: add_sh_reg, add_sh_reg_32
2. ADDS (shifted register). Add and set flags
   Specification: adds_sh_reg, adds_sh_reg_32
3. SUB (shifted register). Subtract
   Specification: sub_sh_reg, sub_sh_reg_32
4. SUBS (shifted register). Subtract and set flags
   Specification: subs_sh_reg, subs_sh_reg_32
5. CMN (shifted register). Compare negative
   Specification: cmn_sh_reg, cmn_sh_reg_32
6. CMP (shifted register). Compare
   Specification: cmp_sh_reg, cmp_sh_reg_32

Total: 12.

Arithmetic (extending register)¶

1. ADD (extended register). Add
   Specification: add_ex_reg, add_ex_reg_32
2. ADDS (extended register). Add and set flags
   Specification: adds_ex_reg, adds_ex_reg_32
3. SUB (extended register). Subtract
   Specification: sub_ex_reg, sub_ex_reg_32
4. SUBS (extended register). Subtract and set flags
   Specification: subs_ex_reg, subs_ex_reg_32
5. CMN (extended register). Compare negative
   Specification: cmn_ex_reg, cmn_ex_reg_32
6. CMP (extended register). Compare
   Specification: cmp_ex_reg, cmp_ex_reg_32

Total: 12.

Logical (shifted register)¶

1. AND (shifted register). Bitwise AND
   Specification: and_bitwise, and_bitwise_32
2. ANDS (shifted register). Bitwise AND and set flags
   Specification: ands_bitwise, ands_bitwise_32
3. BIC (shifted register). Bitwise bit clear
   Specification: bic_bitwise, bic_bitwise_32
4. BICS (shifted register). Bitwise bit clear and set flags
   Specification: bics_bitwise, bics_bitwise_32
5. EON (shifted register). Bitwise exclusive OR NOT
   Specification: eon_bitwise, eon_bitwise_32
6. EOR (shifted register). Bitwise exclusive OR
   Specification: eor_bitwise, eor_bitwise_32
7. ORR (shifted register). Bitwise inclusive OR
   Specification: orr_bitwise, orr_bitwise_32
8. MVN. Bitwise NOT
   Specification: mvn_bitwise, mvn_bitwise_32
9. ORN (shifted register). Bitwise inclusive OR NOT
   Specification: orn_bitwise, orn_bitwise_32
10. TST (shifted register). Test bits
    Specification: tst_bitwise, tst_bitwise_32

Total: 20.

Move (register)¶

1. MOV (register). Move register
   Specification: mov_reg, mov_reg_32
2. MOV (to/from SP). Move register to SP or move SP to register
   Specification: mov_sp, mov_sp_32

Total: 4.

Multiply and divide¶

1. MADD. Multiply-add
   Specification: madd, madd_32
2. MSUB. Multiply-subtract
   Specification: msub, msub_32
3. MNEG. Multiply-negate
   Specification: mneg, mneg_32
4. MUL. Multiply
   Specification: mul, mul_32
5. SMADDL. Signed multiply-add long
   Specification: smaddl
6. SMSUBL. Signed multiply-subtract long
   Specification: smsubl
7. SMNEGL. Signed multiply-negate long
   Specification: smnegl
8. SMULL. Signed multiply long
   Specification: smull
9. SMULH. Signed multiply high
   Specification: smulh
10. UMADDL. Unsigned multiply-add long
    Specification: umaddl
11. UMSUBL. Unsigned multiply-subtract long
    Specification: umsubl
12. UMNEGL. Unsigned multiply-negate long
    Specification: umnegl
13. UMULL. Unsigned multiply long
    Specification: umull
14. UMULH. Unsigned multiply high
    Specification: umulh

Total: 18.

Divide¶

1. SDIV. Signed divide
   Specification: sdiv, sdiv_32
2. UDIV. Unsigned divide
   Specification: udiv, udiv_32

Total: 4.

Branches, Exception generation, and System instructions¶

Conditional Branch¶

1. B.cond. Branch conditionally
   Specification: b
2. CBNZ. Compare and branch if nonzero
   Specification: cbnz, cbnz_32
3. CBZ. Compare and branch if zero
   Specification: cbz, cbz_32
4. TBNZ. Test bit and branch if nonzero
   Specification: tbnz
5. TBZ. Test bit and branch if zero
   Specification: tbz

Total: 7.

Unconditional branch (immediate)¶

1. B. Branch unconditionally
   Specification: b_imm
2. BL. Branch with link
   Specification: bl

Total: 2.

Unconditional branch (register)¶

1. BLR. Branch with link to register
   Specification: blr
2. BR. Branch to register
   Specification: br
3. RET. Return from subroutine
   Specification: ret

Total: 3.

Exception generation and return¶

Exception generation

1. BRK. Breakpoint Instruction
   Specification: brk
2. HLT. Halt Instruction HLT
   Specification: hlt
3. HVC. Generate exception targeting Exception level 2 HVC
   Specification: hvc
4. SMC. Generate exception targeting Exception level 3 SMC
   Specification: smc
5. SVC. Generate exception targeting Exception level 1
   Specification: svc

Total: 5.

Exception return

1. ERET. Exception return using current ELR and SPSR
   Specification: eret

Total: 1.

Debug state

1. DCPS1. Debug switch to Exception level 1 DCPS1
   Specification: dcps1
2. DCPS2. Debug switch to Exception level 2 DCPS2
   Specification: dcps2
3. DCPS3. Debug switch to Exception level 3 DCPS3
   Specification: dcps3
4. DRPS. Debug restore PE state
   Specification: drps

Total: 4.

System register instructions¶

1. MRS. Move System register to general-purpose register MRS
   Specification: msr
2. MSR. Move general-purpose register to System register MSR (register)
   Specification: mrs
3. MSR. Move immediate to PE state field MSR (immediate)
   Specification: msr_dc, msr_ds, msr_ss, msr_uao

Total: 6.

System instructions¶

1. SYS. System instruction
   Specification: sys
2. SYSL. System instruction with result
   Specification: sysl
3. IC. Instruction cache maintenance
   Specification: ic, ic_reg
4. DC. Data cache maintenance
   Specification: dc
5. AT. Address translation
   Specification: at
6. TLBI. TLB Invalidate
   Specification: tlbi, tlbi_reg

Total: 8.

Hint instructions¶

1. NOP. No operation
   Specification: nop
2. YIELD. Yield hint
   Specification: yield_op
3. WFE. Wait for event
   Specification: wfe
4. WFI. Wait for interrupt
   Specification: wfi
5. SEV. Send event
   Specification: sev
6. SEVL. Send event local
   Specification: sevl
7. HINT. Unallocated hint
   Specification: hint

Total: 7.

Barriers and CLREX instructions¶

1. CLREX. Clear Exclusives monitor
   Specification: clrex
2. DMB. Data memory barrier
   Specification: dmb
3. DSB. Data synchronization barrier
   Specification: dsb
4. ISB. Instruction synchronization barrier
   Specification: isb

Total: 4.

Loads and stores¶

Load/store register¶

1. LDR. Load register (immediate offset)
   Specification: ldr_postindex
2. STR. Store register (immediate offset)
   Specification: str_postindex

Total: 2.

Load-Exclusive/Store-Exclusive¶

1. LDXR. Load Exclusive register
   Specification: ldxr, ldxr_32
2. LDXRB. Load Exclusive byte
   Specification: ldxrb_32
3. LDXRH. Load Exclusive halfword
   Specification: ldxrh_32
4. LDXP. Load Exclusive pair
   Specification: ldxp, ldxp_32
5. STXR. Store Exclusive register
   Specification: stxr, stxr_32
6. STXRB. Store Exclusive byte
   Specification: stxrb_32
7. STXRH. Store Exclusive halfword
   Specification: stxrh_32
8. STXP. Store Exclusive pair
   Specification: stxp, stxp_32

Total: 12.

Load-Acquire/Store-Release¶

Non-exclusive Load-Acquire and Store-Release instructions

1. LDAR. Load-Acquire Register
   Specification: ldar, ldar_32
2. LDARB. Load-Acquire Byte
   Specification: ldarb
3. LDARH. Load-Acquire Halfword
   Specification: ldarh
4. STLR. Store-Release Register
   Specification: stlr, stlr_32
5. STLRB. Store-Release Byte
   Specification: stlrb
6. STLRH. Store-Release Halfword
   Specification: stlrh

Total: 8.

Exclusive Load-Acquire and Store-Release instructions

1. LDAXR. Load-Acquire Exclusive register
   Specification: ldaxr, ldaxr_32
2. LDAXRB. Load-Acquire Exclusive byte
   Specification: ldaxrb_32
3. LDAXRH. Load-Acquire Exclusive halfword
   Specification: ldaxrh_32
4. LDAXP. Load-Acquire Exclusive pair
   Specification: ldaxp, ldaxp_32
5. STLXR. Store-Release Exclusive register
   Specification: stlxr, stlxr_32
6. STLXRB. Store-Release Exclusive byte
   Specification: stlxrb_32
7. STLXRH. Store-Release Exclusive halfword
   Specification: stlxrh_32
8. STLXP. Store-Release Exclusive pair
   Specification: stlxp, stlxp_32

Total: 12.

Pseudo instructions¶

psldr, psldr32

Total: 2.