You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: emulate_rdtime.rs
    path of file: ./repos/oreboot/src/arch/src/riscv64/sbi/feature
    
    the code of the file until where you have to start completion: use super::super::runtime::SupervisorContext;
use core::arch::asm;
use log::println;
use riscv::register::cycle;

const DEBUG_THIS: bool = false;

// 0x4102573

#[inline]
pub fn emulate_rdtime(ctx: &mut 
    
fn set_register_xi(ctx: &mut SupervisorContext, i: u8, data: usize) {
    let registers = unsafe { &mut *(ctx as *mut _ as *mut [usize; 31]) };
    assert!(i <= 31, "i should be valid register target");
    if i == 0 {
        // x0, don't modify
        return;
    }
    registers[(i - 1) as usize] = data;
}