From de085fc1ff3d0ac242002a225adb26fc11df98ab Mon Sep 17 00:00:00 2001
From: Gwilym Inzani <email@gwilym.dev>
Date: Tue, 18 Jul 2023 20:23:11 +0100
Subject: [PATCH] Use wrapping add and mul

---
 agb/src/sound/mixer/sw_mixer.rs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/agb/src/sound/mixer/sw_mixer.rs b/agb/src/sound/mixer/sw_mixer.rs
index 0e71faeb..f7f64d39 100644
--- a/agb/src/sound/mixer/sw_mixer.rs
+++ b/agb/src/sound/mixer/sw_mixer.rs
@@ -496,7 +496,10 @@ impl MixerBuffer {
                 unsafe { *channel.data.get_unchecked(channel.pos.floor() as usize) } as i8 as i32;
 
             // SAFETY: working buffer length = self.frequency.buffer_size()
-            unsafe { *working_buffer_i32.get_unchecked_mut(i) += value * mul_amount };
+            unsafe {
+                let value_ref = working_buffer_i32.get_unchecked_mut(i);
+                *value_ref = value_ref.wrapping_add(value.wrapping_mul(mul_amount));
+            };
             channel.pos += playback_speed;
         }
     }