Function decode_illegal

crates/virtual-machine/tests/vm_decoder.rs:161–168

()

#[test]
fn decode_illegal() {
    // Opcode 0 is not a valid RISC-V opcode
    let result = decode(0x0000_0000);
    assert!(
        matches!(result, Err(VmError::IllegalInstruction(0))),
        "opcode 0 should be illegal, got {result:?}"
    );
}