mrrs

Move to Two Registers from System Register (128-bit)

MRRS <Xt>, <Xt+1>, <sysreg>

Reads a 128-bit system register into two general-purpose registers.

Pseudocode Operation

Xt ← SYSREG[sysreg][63:0]
Xt+1 ← SYSREG[sysreg][127:64]

Example

MRRS x3, Xt+1, sysreg

Encoding

Binary Layout

1101010101

31:22

op1

18:16

CRn

15:12

CRm

11:8

op2

7:5

4:0

Format System

Opcode 0xD5700000

Extension FEAT_SYSREG128

Operands

Xt
Lo
Xt+1
Hi
sysreg
Reg

Reference

View in Arm A64 ISA Reference ↗ Arm A64 ISA

Instruction Forms

Encoding	Instruction		ISA		Bit pattern
0xD5700000	MRRS <Xt>, <Xt+1>, (<systemreg>\|S<op0>_<op1>_<Cn>_<Cm>_<op2>)		A64		1101010101 \| 1 \| 1 \| o0 \| op1 \| CRn \| CRm \| op2 \| Rt

Description

Move System Register to two adjacent general-purpose registers allows the PE to read an AArch64 128-bit System register into two adjacent 64-bit general-purpose registers.

Operation

AArch64.SysRegRead128(sys_op0, sys_op1, sys_crn, sys_crm, sys_op2, t, t2);