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Refactor check_interrupts

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This commit is contained in:
Franco Colmenarez 2021-11-11 09:24:09 -05:00
parent 66182da336
commit c68f24ea05
2 changed files with 7 additions and 16 deletions
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10
src/bus.rs
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@ -184,18 +184,8 @@ impl Bus {
self.write(address.wrapping_add(1), bytes[1]); self.write(address.wrapping_add(1), bytes[1]);
} }
pub fn set_interrupt_enable(&mut self, interrupt: Interrupt, val: bool) {
let byte = self.read(INTERRUPT_ENABLE_ADDRESS);
self.write(INTERRUPT_ENABLE_ADDRESS, interrupt.set(byte, val));
}
pub fn set_interrupt_flag(&mut self, interrupt: Interrupt, val: bool) { pub fn set_interrupt_flag(&mut self, interrupt: Interrupt, val: bool) {
let byte = self.read(INTERRUPT_FLAG_ADDRESS); let byte = self.read(INTERRUPT_FLAG_ADDRESS);
self.write(INTERRUPT_FLAG_ADDRESS, interrupt.set(byte, val)); self.write(INTERRUPT_FLAG_ADDRESS, interrupt.set(byte, val));
} }
pub fn get_interrupt(&mut self, interrupt: Interrupt) -> bool {
let byte = self.read(INTERRUPT_ENABLE_ADDRESS) & self.read(INTERRUPT_FLAG_ADDRESS);
interrupt.get(byte)
}
} }

13
src/cpu.rs
View File

@ -917,22 +917,23 @@ impl CPU {
} }
pub fn check_interrupts(&mut self, bus: &mut Bus) -> Option<Interrupt> { pub fn check_interrupts(&mut self, bus: &mut Bus) -> Option<Interrupt> {
if (bus.read(INTERRUPT_ENABLE_ADDRESS) & 0b00011111) & (bus.read(INTERRUPT_FLAG_ADDRESS) & 0b00011111) != 0 { let interrupts = (bus.read(INTERRUPT_ENABLE_ADDRESS) & 0b00011111) & (bus.read(INTERRUPT_FLAG_ADDRESS) & 0b00011111);
if interrupts != 0 {
self.is_halted = false; self.is_halted = false;
} }
if !self.ime { if !self.ime {
return None; return None;
} }
if bus.get_interrupt(Interrupt::VBlank) { if Interrupt::VBlank.get(interrupts) {
return Some(Interrupt::VBlank); return Some(Interrupt::VBlank);
} else if bus.get_interrupt(Interrupt::LCDSTAT) { } else if Interrupt::LCDSTAT.get(interrupts) {
return Some(Interrupt::LCDSTAT); return Some(Interrupt::LCDSTAT);
} else if bus.get_interrupt(Interrupt::Timer) { } else if Interrupt::Timer.get(interrupts) {
return Some(Interrupt::Timer); return Some(Interrupt::Timer);
} else if bus.get_interrupt(Interrupt::Serial) { } else if Interrupt::Serial.get(interrupts) {
return Some(Interrupt::Serial); return Some(Interrupt::Serial);
} else if bus.get_interrupt(Interrupt::Joypad) { } else if Interrupt::Joypad.get(interrupts) {
return Some(Interrupt::Joypad); return Some(Interrupt::Joypad);
} }
None None