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+

mod add;
+mod dec;
+mod jmp;
+mod jnz;
+mod jz;
+mod mov;
+mod ret;
+mod test;
+
+pub trait Add<T, U> {
+    /// Emit an add instruction.
+    fn add(&mut self, op1: T, op2: U);
+}
+
+pub trait Dec<T> {
+    /// Emit a decrement instruction.
+    fn dec(&mut self, op1: T);
+}
+
+pub trait Jmp<T> {
+    /// Emit an unconditional jump instruction.
+    fn jmp(&mut self, op1: T);
+}
+
+pub trait Jnz<T> {
+    /// Emit a conditional jump if not zero instruction (`ZF = 0`).
+    fn jnz(&mut self, op1: T);
+}
+
+pub trait Jz<T> {
+    /// Emit a conditional jump if zero instruction (`ZF = 1`).
+    fn jz(&mut self, op1: T);
+}
+
+pub trait Mov<T, U> {
+    /// Emit an move instruction.
+    fn mov(&mut self, op1: T, op2: U);
+}
+
+pub trait Test<T, U> {
+    /// Emit a logical compare instruction.
+    ///
+    /// Computes the bit-wise logical AND of first operand and the second operand and sets the
+    /// `SF`, `ZF`, and `PF` status flags, the result is discarded.
+    fn test(&mut self, op1: T, op2: U);
+}
+

+