Method xneg32

pulley/src/interp.rs:1903–1907

(&mut self, dst: XReg, src: XReg)

    }

    fn xneg32(&mut self, dst: XReg, src: XReg) -> ControlFlow<Done> {
        let a = self.state[src].get_i32();
        self.state[dst].set_i32(a.wrapping_neg());
        ControlFlow::Continue(())
    }

    fn xneg64(&mut self, dst: XReg, src: XReg) -> ControlFlow<Done> {
        let a = self.state[src].get_i64();