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mfw overflowing_add

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This commit is contained in:
Lea 2023-01-25 19:12:14 +01:00
parent 5be0da1a90
commit 1398de8181
Signed by: Lea
GPG key ID: 1BAFFE8347019C42
1 changed files with 2 additions and 2 deletions
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4
src/emulator/instructions/arithmetic.rs
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@ -48,8 +48,8 @@ pub fn dad(register: Register, state: &mut EmulatorState) {
_ => panic!("Cannot perform DAD on register {:?}", register),
};
let result = num as u32 + u16::from_le_bytes([state.l, state.h]) as u32;
state.cc.c = result > 0xffff;
let (result, overflow) = num.overflowing_add(u16::from_le_bytes([state.l, state.h]));
state.cc.c = overflow;
state.h = (result >> 8) as u8;
state.l = result as u8;
}