mirror of
https://github.com/FranLMSP/snes.git
synced 2026-08-03 08:30:01 -04:00
13 lines
433 B
Rust
13 lines
433 B
Rust
use crate::{cpu::registers::Registers, utils::{num_trait::SnesNum, alu}, common::flags::Flags};
|
|
|
|
pub fn do_dec<T: SnesNum>(registers: &mut Registers, target: T) -> T {
|
|
let (result, affected_flags) = alu::sbc_bin(target, T::from_u32(1), false);
|
|
for flag in affected_flags {
|
|
match flag {
|
|
Flags::Negative(_) | Flags::Zero(_) => registers.set_flags(&[flag]),
|
|
_ => {},
|
|
}
|
|
}
|
|
result
|
|
}
|