use crate::processor::{get_bit, Direction, CPU};

impl CPU {
    pub(crate) fn rlc(&mut self, byte: u8) -> u8 {
        self.rotate_c(byte, Direction::Left)
    }

    pub(crate) fn rrc(&mut self, byte: u8) -> u8 {
        self.rotate_c(byte, Direction::Right)
    }

    pub(crate) fn rl(&mut self, byte: u8) -> u8 {
        self.rotate(byte, Direction::Left)
    }

    pub(crate) fn rr(&mut self, byte: u8) -> u8 {
        self.rotate(byte, Direction::Right)
    }

    pub(crate) fn sla(&mut self, byte: u8) -> u8 {
        self.shift(byte, Direction::Left)
    }

    pub(crate) fn sra(&mut self, byte: u8) -> u8 {
        let b = get_bit(byte, 7);
        let val = self.shift(byte, Direction::Right);
        if b {
            val + 0b10000000
        } else {
            val
        }
    }

    pub(crate) fn srl(&mut self, byte: u8) -> u8 {
        self.shift(byte, Direction::Right)
    }

    pub(crate) fn rst(&mut self, address: u16) {
        self.push(self.state.pc);
        self.state.pc.as_u8s.left = 0x0;
        self.state.pc.as_u8s.right = self.memory.get(address);
    }
}