44 lines
1.1 KiB
Rust
44 lines
1.1 KiB
Rust
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use crate::processor::{get_bit, Direction, CPU};
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impl CPU {
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pub(crate) fn rlc(&mut self, byte: u8) -> u8 {
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self.rotate_c(byte, Direction::Left)
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}
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pub(crate) fn rrc(&mut self, byte: u8) -> u8 {
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self.rotate_c(byte, Direction::Right)
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}
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pub(crate) fn rl(&mut self, byte: u8) -> u8 {
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self.rotate(byte, Direction::Left)
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}
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pub(crate) fn rr(&mut self, byte: u8) -> u8 {
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self.rotate(byte, Direction::Right)
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}
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pub(crate) fn sla(&mut self, byte: u8) -> u8 {
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self.shift(byte, Direction::Left)
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}
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pub(crate) fn sra(&mut self, byte: u8) -> u8 {
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let b = get_bit(byte, 7);
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let val = self.shift(byte, Direction::Right);
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if b {
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val + 0b10000000
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} else {
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val
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}
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}
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pub(crate) fn srl(&mut self, byte: u8) -> u8 {
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self.shift(byte, Direction::Right)
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}
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pub(crate) fn rst(&mut self, address: u16) {
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self.push(self.state.pc);
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self.state.pc.as_u8s.left = 0x0;
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self.state.pc.as_u8s.right = self.memory.get(address);
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}
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}
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