More bytecode ops

src/stackframe.rs

@@ -1,5 +1,5 @@
 use crate::classfile::{ JavaClassFile, AttributeData };
-use crate::heap_area::ObjectReference;
+use crate::heap_area::{ ObjectReference, FieldValue };
 
 #[derive(Copy, Clone, Debug)]
 pub enum StackValue {
@@ -48,6 +48,27 @@ impl OperandStack {
 
         Ok(())
     }
+
+    pub fn push_field_value(&mut self, value: FieldValue) -> Result<(), Error> {
+        match value {
+            FieldValue::Reference(r) => {
+                self.push(StackValue::Reference(r))
+            }
+
+            FieldValue::Boolean(b) => {
+                self.push(StackValue::Int(if b { 1 } else { 0 }))
+            }
+
+            FieldValue::Byte(b) => {
+                self.push(StackValue::Int(b as i32))
+            }
+
+            _ => {
+                println!("{value:?}");
+                todo!();
+            }
+        }
+    }
     
     pub fn pop_computational_1(&mut self, index: usize) -> Result<StackValue, Error> {
         let absolute_index = self.depth as usize - 1 - index;