cpu: arm: Fix alu_add_update_carry function

Woopsie Former-commit-id: 2da74e4bfd4b59a2885519a99f4b2c3d83031ee2
2019-07-01 19:25:42 +03:00 · 2019-07-01 19:25:42 +03:00 · 70179984d0
parent 2081b70ee2
commit 70179984d0
1 changed files with 1 additions and 1 deletions
--- a/src/arm7tdmi/arm/exec.rs
+++ b/src/arm7tdmi/arm/exec.rs
@ -131,7 +131,7 @@ impl Core {
    }

    fn alu_add_update_carry(a: i32, b: i32, carry: &mut bool) -> i32 {
-        let res = a.wrapping_sub(b);
+        let res = a.wrapping_add(b);
        *carry = res < a;
        res
    }