Method xneg64

pulley/src/interp.rs:1909–1913

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

    }

    fn xneg64(&mut self, dst: XReg, src: XReg) -> ControlFlow<Done> {
        let a = self.state[src].get_i64();
        self.state[dst].set_i64(a.wrapping_neg());
        ControlFlow::Continue(())
    }

    fn xeq64(&mut self, operands: BinaryOperands<XReg>) -> ControlFlow<Done> {
        let a = self.state[operands.src1].get_u64();