If r2 < 4 don't overwrite all memory (#475)

Rare case, but we probably shouldn't break everything if it happens :) - [x] Changelog updated / no changelog update needed
agbrs · Aug 26, 2023 · dd11960 · dd11960
2 parents 9a6f96b + dc46cfe
commit dd11960
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/agb/src/sound/mixer/mixer.s b/agb/src/sound/mixer/mixer.s
@@ -64,6 +64,9 @@ agb_arm_func \fn_name
     bne 4b
 
 5:
+    cmp r2, #0
+    beq 3f
+
 .irp reg, r7,r8,r9,r10
     mov \reg, #0
 .endr