Perform a serializing operation on all load-from-memory and store-to-memory instructions that were issued prior to
this instruction. Guarantees that every memory access that precedes, in program order, the memory fence instruction
is globally visible before any memory instruction which follows the fence in program order.
Perform a serializing operation on all load-from-memory and store-to-memory instructions that were issued prior to this instruction. Guarantees that every memory access that precedes, in program order, the memory fence instruction is globally visible before any memory instruction which follows the fence in program order.