squash all the thingsHEADmain

1 files changed, 15 insertions, 1 deletions

diff --git a/submit/ast/Mutable.java b/submit/ast/Mutable.java
index d549371..ac9b7ff 100644
--- a/submit/ast/Mutable.java
+++ b/submit/ast/Mutable.java
@@ -4,11 +4,15 @@
  */
 package submit.ast;
 
+import submit.MIPSResult;
+import submit.RegisterAllocator;
+import submit.SymbolTable;
+
 /**
  *
  * @author edwajohn
  */
-public class Mutable extends AbstractNode implements Expression {
+public class Mutable implements Expression {
 
   private final String id;
   private final Expression index;
@@ -28,4 +32,14 @@ public class Mutable extends AbstractNode implements Expression {
     }
   }
 
+  public MIPSResult toMIPS(StringBuilder code, StringBuilder data,
+                           SymbolTable symbolTable,
+                           RegisterAllocator regAllocator) {
+    String stackReg = regAllocator.getAny();
+
+    code.append(String.format("li %s %d\n", stackReg, symbolTable.offsetOf(id)))
+        .append(String.format("add %s %s $sp\n", stackReg, stackReg));
+
+    return MIPSResult.createAddressResult(stackReg, VarType.INT);
+  }
 }