Function load_int

crates/virtual-machine/src/cpu/pipeline/memory.rs:239–285

(bus: &mut SystemBus, addr: u64, funct3: u8)

            Ok(dw)
        }
        4 => {
            let byte = bus
                .read_byte(addr)
                .map_err(|_| VmError::LoadAccessFault(addr))?;
            Ok(byte as u64)
        }
        5 => {
            let hw = bus
                .read_halfword(addr)
                .map_err(|_| VmError::LoadAccessFault(addr))?;
            Ok(hw as u64)
        }
        6 => {
            let w = bus
                .read_word(addr)
                .map_err(|_| VmError::LoadAccessFault(addr))?;
            Ok(w as u64)
        }
        _ => Err(VmError::LoadAccessFault(addr)),
    }
}

// --- Integer store ---

fn store_int(bus: &mut SystemBus, addr: u64, val: u64, funct3: u8) -> Result<(), VmError> {
    match funct3 {
        0 => bus
            .write_byte(addr, val as u8)
            .map_err(|_| VmError::StoreAccessFault(addr)),
        1 => bus
            .write_halfword(addr, val as u16)
            .map_err(|_| VmError::StoreAccessFault(addr)),
        2 => bus
            .write_word(addr, val as u32)
            .map_err(|_| VmError::StoreAccessFault(addr)),
        3 => bus
            .write_doubleword(addr, val)
            .map_err(|_| VmError::StoreAccessFault(addr)),
        _ => Err(VmError::StoreAccessFault(addr)),
    }
}

// --- FP load ---

fn load_fp(bus: &mut SystemBus, addr: u64, funct3: u8) -> Result<u64, VmError> {
    match funct3 {
        2 => {
            // FLW: NaN-box
            let word = bus
                .read_word(addr)