From b714827f244cfbf1670e46cfca0a3fc2381fa147 Mon Sep 17 00:00:00 2001
From: Shautvast <sander.hautvast@top-squad.nl>
Date: Thu, 7 Dec 2023 15:27:30 +0100
Subject: [PATCH] bugfix increment needs to be i16 not u16

---
 src/vm/runtime.rs | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/vm/runtime.rs b/src/vm/runtime.rs
index 0dcb819..2772557 100644
--- a/src/vm/runtime.rs
+++ b/src/vm/runtime.rs
@@ -427,7 +427,7 @@ impl Stackframe {
                     self.push(I32(compare(value1, value2)));
                 }
                 IINC(index8, const8) => {
-                    self.increment(*index8 as usize, *const8 as u16);
+                    self.increment(*index8 as usize, (*const8 as i8) as i16);
                 }
                 I2L => {
                     let value = self.pop().into_i32() as i64;
@@ -454,7 +454,7 @@ impl Stackframe {
                     self.push(F64(value));
                 }
                 WIDE_IINC(index16, const16) => {
-                    self.increment(*index16 as usize, *const16);
+                    self.increment(*index16 as usize, *const16 as i16);
                 }
                 F2I => {
                     let value = self.pop().into_f32() as i32;
@@ -878,7 +878,7 @@ impl Stackframe {
         Void
     }
 
-    fn increment(&mut self, index: usize, inc: u16) {
+    fn increment(&mut self, index: usize, inc: i16) {
         match &mut self.locals[index] {
             I32(l) => *l += (inc as i32),
             I64(l) => *l += (inc as i64),