# Function core::arch::x86::_mm_lfence

1.27.0 · source · [−]

    pub unsafe fn _mm_lfence()

Available on (x86 or x86-64) and target feature `sse2` and x86 only.
Expand description

Performs a serializing operation on all load-from-memory instructions that were issued prior to this instruction.

Guarantees that every load instruction that precedes, in program order, is globally visible before any load instruction which follows the fence in program order.

Intel’s documentation