BRB

Branch Record Buffer. For more information, see op0==0b01, cache maintenance, TLB maintenance, and address translation instructions.

This is an alias of SYS. This means:

System
(FEAT_BRBE)

313029282726252423222120191817161514131211109876543210
110101010000100101110010op2Rt
Lop1CRnCRm

BRB <brb_op>{, <Xt>}

is equivalent to

SYS #1, C7, C2, #<op2>{, <Xt>}

and is the preferred disassembly when SysOp('001','0111','0010',op2) == Sys_BRB.

Assembler Symbols

<brb_op>

Is a BRB instruction name, as listed for the BRB system instruction group, encoded in op2:

op2 <brb_op> Architectural Feature
100 IALL FEAT_BRBE
101 INJ FEAT_BRBE
<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 optional general-purpose source register, defaulting to '11111', encoded in the "Rt" field.

Operation

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


Internal version only: isa v33.64, AdvSIMD v29.12, pseudocode v2023-06_rel, sve v2023-06_rel ; Build timestamp: 2023-07-04T19:42

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