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: machine_timer.rs
    path of file: ./repos/tock/arch/rv32i/src
    
    the code of the file until where you have to start completion: // Licensed under the Apache License, Version 2.0 or the MIT Li
    
    pub fn set_alarm(&self, reference: Ticks64, dt: Ticks64) {
        // This does not handle the 64-bit wraparound case.
        // Because mtimer fires if the counter is >= the compare,
        // handling wraparound requires setting compare to the
        // maximum value, issuing a callback on the overflow client
        // if there is one, spinning until it wraps around to 0, then
        // setting the compare to the correct value.
        let regs = self;
        let now = self.now();
        let mut expire = reference.wrapping_add(dt);

        if !now.within_range(reference, expire) {
            expire = now;
        }

        let val = expire.into_u64();

        let high = (val >> 32) as u32;
        let low = (val & 0xffffffff) as u32;

        // Recommended approach for setting the two compare registers
        // (RISC-V Privileged Architectures 3.1.15) -pal 8/6/20
        regs.compare_low.set(0xFFFF_FFFF);
        regs.compare_high.set(high);
        regs.compare_low.set(low);
    }