AFENCE

Operation

Order prior memory operations before later memory operations.

Assembler Syntax

AFENCE

Privilege

Unprivileged

Acts as a full cumulative fence. Every earlier memory read and write is ordered before every later memory read and write on the same logical processor, and memory effects observed before the fence are propagated before effects ordered after it. Every AFENCE participates in the single global sequentially consistent order. It performs no memory access and changes no register or flag.

2.75in

Encodings

AFENCE

Format: Instruction format for AFENCE