fix: byte、short 运算后会变为 int 的问题

src/main/java/org/jcnc/snow/vm/commands/arithmetic/byte8/BAddCommand.java

@@ -50,7 +50,7 @@ public class BAddCommand implements Command {
         byte a = (byte) operandStack.pop();
 
         // Perform the addition and push the result back onto the stack
-        operandStack.push(a + b);
+        operandStack.push((byte)(a + b));
 
         // Return the updated program counter (next instruction)
         return currentPC + 1;

src/main/java/org/jcnc/snow/vm/commands/arithmetic/byte8/BDivCommand.java

@@ -56,7 +56,7 @@ public class BDivCommand implements Command {
         }
 
         // Perform the division and push the result back onto the stack
-        operandStack.push(a / b);
+        operandStack.push((byte)(a / b));
 
         // Return the updated program counter (next instruction)
         return currentPC + 1;

src/main/java/org/jcnc/snow/vm/commands/arithmetic/byte8/BModCommand.java

@@ -50,7 +50,7 @@ public class BModCommand implements Command {
         byte a = (byte) operandStack.pop();
 
         // Perform the modulus operation and push the result back onto the stack
-        operandStack.push(a % b);
+        operandStack.push((byte)(a % b));
 
         // Return the updated program counter (next instruction)
         return currentPC + 1;

src/main/java/org/jcnc/snow/vm/commands/arithmetic/byte8/BMulCommand.java

@@ -50,7 +50,7 @@ public class BMulCommand implements Command {
         byte a = (byte) operandStack.pop();
 
         // Perform the multiplication and push the result back onto the stack
-        operandStack.push(a * b);
+        operandStack.push((byte)(a * b));
 
         // Return the updated program counter (next instruction)
         return currentPC + 1;

src/main/java/org/jcnc/snow/vm/commands/arithmetic/byte8/BSubCommand.java

@@ -50,7 +50,7 @@ public class BSubCommand implements Command {
         byte a = (byte) operandStack.pop();
 
         // Perform the subtraction and push the result back onto the stack
-        operandStack.push(a - b);
+        operandStack.push((byte)(a - b));
 
         // Return the updated program counter (next instruction)
         return currentPC + 1;

src/main/java/org/jcnc/snow/vm/commands/arithmetic/short16/SAddCommand.java

@@ -46,11 +46,11 @@ public class SAddCommand implements Command {
     @Override
     public int execute(String[] parts, int currentPC, OperandStack operandStack, LocalVariableStore localVariableStore, CallStack callStack) {
         // Pop the top two operands from the stack
-        Short b = (Short) operandStack.pop();
+        short b = (short) operandStack.pop();
-        Short a = (Short) operandStack.pop();
+        short a = (short) operandStack.pop();
 
         // Perform the addition and push the result back onto the stack
-        operandStack.push(a + b);
+        operandStack.push((short)(a + b));
 
         // Return the updated program counter (next instruction)
         return currentPC + 1;

src/main/java/org/jcnc/snow/vm/commands/arithmetic/short16/SDivCommand.java

@@ -56,7 +56,7 @@ public class SDivCommand implements Command {
         }
 
         // Perform the division and push the result back onto the stack
-        operandStack.push(a / b);
+        operandStack.push((short)(a / b));
 
         // Return the updated program counter (next instruction)
         return currentPC + 1;

src/main/java/org/jcnc/snow/vm/commands/arithmetic/short16/SModCommand.java

@@ -50,7 +50,7 @@ public class SModCommand implements Command {
         short a = (short) operandStack.pop();
 
         // Perform the modulus operation and push the result back onto the stack
-        operandStack.push(a % b);
+        operandStack.push((short)(a % b));
 
         // Return the updated program counter (next instruction)
         return currentPC + 1;

src/main/java/org/jcnc/snow/vm/commands/arithmetic/short16/SMulCommand.java

@@ -50,7 +50,7 @@ public class SMulCommand implements Command {
         short a = (short) operandStack.pop();
 
         // Perform the multiplication and push the result back onto the stack
-        operandStack.push(a * b);
+        operandStack.push((short)(a * b));
 
         // Return the updated program counter (next instruction)
         return currentPC + 1;

src/main/java/org/jcnc/snow/vm/commands/arithmetic/short16/SSubCommand.java

@@ -50,7 +50,7 @@ public class SSubCommand implements Command {
         short a = (short) operandStack.pop();
 
         // Perform the subtraction and push the result back onto the stack
-        operandStack.push(a - b);
+        operandStack.push((short)(a - b));
 
         // Return the updated program counter (next instruction)
         return currentPC + 1;