MRS
Move System register to general-purpose register
This instruction allows the PE to read
an AArch64 System register into a general-purpose register.
1
1
0
1
0
1
0
1
0
0
1
1
MRS <Xt>, (<systemreg>|S<op0>_<op1>_<Cn>_<Cm>_<op2>)
let t : integer = UInt(Rt);
let sys_L : bits(1) = L;
let sys_op0 : bits(2) = '1' :: o0;
let sys_op1 : bits(3) = op1;
let sys_op2 : bits(3) = op2;
let sys_crn : bits(4) = CRn;
let sys_crm : bits(4) = CRm;
<Xt>
Is the 64-bit name of the general-purpose destination register, encoded in the "Rt" field.
<systemreg>
Is a System register name, encoded in "o0:op1:CRn:CRm:op2".
The System register names are defined in AArch64 System Register Descriptions.
<op0>
Is an unsigned immediate,
<op1>
Is a 3-bit unsigned immediate, in the range 0 to 7, encoded in the "op1" field.
<Cn>
Is a name 'Cn', with 'n' in the range 0 to 15, encoded in the "CRn" field.
<Cm>
Is a name 'Cm', with 'm' in the range 0 to 15, encoded in the "CRm" field.
<op2>
Is a 3-bit unsigned immediate, in the range 0 to 7, encoded in the "op2" field.
AArch64_SysRegRead(sys_op0, sys_op1, sys_crn, sys_crm, sys_op2, t);
2026-03-12 12:23:09
2025-09_rel_asl1