diff --git a/src/codegen.c b/src/codegen.c
index 88a2ab1..acbf76d 100644
--- a/src/codegen.c
+++ b/src/codegen.c
@@ -535,11 +535,39 @@ int generateCondGoto(Instruction *inst) {
 }
 
 int generateIfTrue(Instruction *inst) {
-    return -1;
+    TNodeOrConst *op1 = getOperand1(inst);
+    
+    if (op1 == NULL) {
+        printdebug("%sgenerateIfTrue failed, NULL operand", COLOR_RED);
+        return -1;
+    }
+
+    CGNode *cg = findCG(getTN(op1));
+    if (cg == NULL) {
+        printdebug("generateIfTrue failed, operand not on stack");
+        return -1;
+    }
+
+    fprintf(cg_flag, "\tcmpl\t$0, %d(%%rbp)\t#if true start\n", getAddress(cg));
+    fprintf(cg_flag, "\tjne\t.L%d\t\t#if true end\n", getLabel(inst));
 }
 
 int generateIfFalse(Instruction *inst) {
-    return -1;
+    TNodeOrConst *op1 = getOperand1(inst);
+    
+    if (op1 == NULL) {
+        printdebug("%sgenerateIfFalse failed, NULL operand", COLOR_RED);
+        return -1;
+    }
+
+    CGNode *cg = findCG(getTN(op1));
+    if (cg == NULL) {
+        printdebug("generateIfFalse failed, operand not on stack");
+        return -1;
+    }
+
+    fprintf(cg_flag, "\tcmpl\t$0, %d(%%rbp)\t#if false start\n", getAddress(cg));
+    fprintf(cg_flag, "\tje\t.L%d\t\t#if false end\n", getLabel(inst));
 }
 
 int generateLessThan(Instruction *inst) {
diff --git a/tests/programs/fib.alpha b/tests/programs/fib.alpha
index 9ebef58..37a86c8 100644
--- a/tests/programs/fib.alpha
+++ b/tests/programs/fib.alpha
@@ -12,9 +12,10 @@ Fib(i) := {
         } else {
                 i := i;
         }
-        b := b | (a & c);
-        b := 2 < 3;
+        (*b := b | (a & c);
+        b := 2 < 3;*)
         if(i = 1) then {
+	     i := printCharacter('a');
                 return 1;
         } else {
                 return i + Fib(i - 1);