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Overflow bug

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This commit is contained in:
Franco Colmenarez 2021-10-19 14:34:23 -05:00
parent 3b81d34d71
commit fade566d12
1 changed files with 1 additions and 2 deletions
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3
src/cpu.rs
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@ -546,7 +546,6 @@ impl CPU {
let res = (val1 as usize) + (val2 as usize); let res = (val1 as usize) + (val2 as usize);
let carry = ((val1 & 0x00FF) + (val2 & 0x00FF) > 0x00FF) || (res > 0xFFFF); let carry = ((val1 & 0x00FF) + (val2 & 0x00FF) > 0x00FF) || (res > 0xFFFF);
self.registers.set_flag(FlagRegister::Carry, carry); self.registers.set_flag(FlagRegister::Carry, carry);
println!("Carry: {}", carry);
} else if reg1.is_8bit() && reg2.is_16bit() { } else if reg1.is_8bit() && reg2.is_16bit() {
let val1 = self.registers.get(reg1); let val1 = self.registers.get(reg1);
let val2 = bus.read(self.registers.get(reg2)) as u16; let val2 = bus.read(self.registers.get(reg2)) as u16;
@ -569,7 +568,7 @@ impl CPU {
self.registers.increment(Register::PC, 1); self.registers.increment(Register::PC, 1);
let val1 = self.registers.get(reg1) as i16; let val1 = self.registers.get(reg1) as i16;
let val2 = value as i16; let val2 = value as i16;
let res = (val1) + (val2); let res = (val1 as isize) + (val2 as isize);
self.registers.increment(reg1, val2 as u16); self.registers.increment(reg1, val2 as u16);
self.registers.set_flag(FlagRegister::HalfCarry, add_half_carry(val1.to_be_bytes()[1], val2.to_be_bytes()[1])); self.registers.set_flag(FlagRegister::HalfCarry, add_half_carry(val1.to_be_bytes()[1], val2.to_be_bytes()[1]));
self.registers.set_flag(FlagRegister::Zero, self.registers.get(reg1) == 0); self.registers.set_flag(FlagRegister::Zero, self.registers.get(reg1) == 0);