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AT

Address Translate.

This instruction is an alias of SYS.

The equivalent instruction is SYS #op1, C7, Cm, #op2, Xt.

Syntax

AT at_op, Xt

Where:

at_op
Is an AT instruction name, as listed for the AT system instruction group, and can be one of the values shown in Usage.
op1
Is a 3-bit unsigned immediate, in the range 0 to 7.
Cm
Is a name Cm, with m in the range 0 to 15.
op2
Is a 3-bit unsigned immediate, in the range 0 to 7.
Xt
Is the 64-bit name of the general-purpose source register.

Usage

Address Translate. For more information, see A64 system instructions for address translation in the ARMv8-A Architecture Reference Manual.

The following table shows the valid specifier combinations:

Table 16-4 SYS parameter values corresponding to AT operations

at_op op1 op2
000 0  
000 4  
000 6  
001 0  
001 4  
001 6  
010 0  
011 0  
100 4  
101 4  
110 4  
111 4