Add conditional call instructions

vm/ophandler.go

@@ -4,7 +4,6 @@ type opHandler func(*State, *Instruction)
 
 var opHandlers = map[OpCodeType]opHandler{
 	OpNoOp:   (*State).handleNoOp,
-	OpCall:   (*State).handleCall,
 	OpReturn: (*State).handleReturn,
 
 	OpMove: (*State).handleMove,
@@ -28,16 +27,15 @@ var opHandlers = map[OpCodeType]opHandler{
 	OpJump:        (*State).handleJump,
 	OpJumpIfTrue:  (*State).handleJumpIfTrue,
 	OpJumpIfFalse: (*State).handleJumpIfFalse,
+
+	OpCall:        (*State).handleCall,
+	OpCallIfTrue:  (*State).handleCallIfTrue,
+	OpCallIfFalse: (*State).handleCallIfFalse,
 }
 
 func (state *State) handleNoOp(instr *Instruction) {
 }
 
-func (state *State) handleCall(instr *Instruction) {
-	in := state.readSigned(&instr.Operand1)
-	state.call(in)
-}
-
 func (state *State) handleReturn(instr *Instruction) {
 	state.ret()
 }
@@ -147,3 +145,20 @@ func (state *State) handleJumpIfFalse(instr *Instruction) {
 		state.handleJump(instr)
 	}
 }
+
+func (state *State) handleCall(instr *Instruction) {
+	in := state.readSigned(&instr.Operand1)
+	state.call(in)
+}
+
+func (state *State) handleCallIfTrue(instr *Instruction) {
+	if state.comparisonResult == true {
+		state.handleCall(instr)
+	}
+}
+
+func (state *State) handleCallIfFalse(instr *Instruction) {
+	if state.comparisonResult == false {
+		state.handleCall(instr)
+	}
+}