MRRS
Move System register to two adjacent general-purpose registers
This instruction
allows the PE to read an AArch64 128-bit System register into
two adjacent 64-bit general-purpose registers.
1
1
0
1
0
1
0
1
0
1
1
1
MRRS <Xt>, <Xt+1>, (<systemreg>|S<op0>_<op1>_<Cn>_<Cm>_<op2>)
if !IsFeatureImplemented(FEAT_SYSREG128) then EndOfDecode(Decode_UNDEF); end;
if Rt[0] == '1' then EndOfDecode(Decode_UNDEF); end;
let t : integer = UInt(Rt);
let t2 : integer = UInt(Rt+1);
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 first general-purpose destination register, encoded in the "Rt" field.
<Xt+1>
Is the 64-bit name of the second general-purpose destination register, encoded as "Rt" +1.
<systemreg>
Is a System register name, encoded in "o0:op1:CRn:CRm:op2".
<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_SysRegRead128(sys_op0, sys_op1, sys_crn, sys_crm, sys_op2, t, t2);
2026-03-26 20:27:25
2026-03_rel