Index

AT

Address Translate. For more information, see op0==0b01, cache maintenance, TLB maintenance, and address translation instructions.

This is an alias of SYS. This means:

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

AT <at_op>, <Xt>

is equivalent to

SYS #<op1>, C7, <Cm>, #<op2>, <Xt>

and is the preferred disassembly when SysOp(op1,'0111',CRm,op2) == Sys_AT.

Assembler Symbols

<at_op>

Is an AT instruction name, as listed for the AT system instruction group, encoded in op1:CRm<0>:op2:

op1 CRm<0> op2 <at_op> Architectural Feature
000 0 000 S1E1R -
000 0 001 S1E1W -
000 0 010 S1E0R -
000 0 011 S1E0W -
000 1 000 S1E1RP FEAT_PAN2
000 1 001 S1E1WP FEAT_PAN2
000 1 010 S1E1A FEAT_ATS1A
100 0 000 S1E2R -
100 0 001 S1E2W -
100 0 100 S12E1R -
100 0 101 S12E1W -
100 0 110 S12E0R -
100 0 111 S12E0W -
100 1 010 S1E2A FEAT_ATS1A
110 0 000 S1E3R -
110 0 001 S1E3W -
110 1 010 S1E3A FEAT_ATS1A
<op1>

Is a 3-bit unsigned immediate, in the range 0 to 7, encoded in the "op1" 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.
<Xt>

Is the 64-bit name of the general-purpose source register, encoded in the "Rt" field.

Operation

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