Function fence_i 

pub unsafe fn fence_i()

🔬This is a nightly-only experimental API. (riscv_ext_intrinsics #114544)

Available on (RISC-V RV32 or RISC-V RV64) and (RISC-V RV64) only.

Generates the FENCE.I instruction

A FENCE.I instruction ensures that a subsequent instruction fetch on a RISC-V hart will see any previous data stores already visible to the same RISC-V hart.

FENCE.I does not ensure that other RISC-V harts’ instruction fetches will observe the local hart’s stores in a multiprocessor system.