From dc46cfef45a8c692d05de364dc5fbbfd88bac699 Mon Sep 17 00:00:00 2001
From: Gwilym Inzani <email@gwilym.dev>
Date: Tue, 22 Aug 2023 20:15:26 +0100
Subject: [PATCH] If r2 < 4 don't overwrite all memory

---
 agb/src/sound/mixer/mixer.s | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/agb/src/sound/mixer/mixer.s b/agb/src/sound/mixer/mixer.s
index fa59156f..9fafa4fc 100644
--- 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