Method xpopcnt32

pulley/src/interp.rs:2459–2463

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

    }

    fn xpopcnt32(&mut self, dst: XReg, src: XReg) -> ControlFlow<Done> {
        let a = self.state[src].get_u32();
        self.state[dst].set_u32(a.count_ones());
        ControlFlow::Continue(())
    }

    fn xpopcnt64(&mut self, dst: XReg, src: XReg) -> ControlFlow<Done> {
        let a = self.state[src].get_u64();