Mercurial > ljs / file diff

--- a/lvm.js	Tue Oct 26 10:43:56 2010 +0100
+++ b/lvm.js	Fri Nov 19 03:37:51 2010 +0000
@@ -11,7 +11,10 @@
 var OP_SETTABLE = 9;
 var OP_NEWTABLE = 10;
 var OP_SELF = 11;
+var OP_ADD = 12;
+var OP_SUB = 13;
 var OP_JMP = 22;
+var OP_LT = 24;
 var OP_TEST = 26;
 var OP_CALL = 28;
 var OP_RETURN = 30;
@@ -481,6 +484,22 @@
 			case OP_JMP:
 				frame.pc+=INS_sBx(instruction);
 				break;
+			case OP_ADD:
+				var RB = frame.reg[INS_B(instruction)];
+				var RC = frame.reg[INS_C(instruction)];
+				frame.reg[INS_A(instruction)] = new LValue("number", RB.value + RC.value);
+				break;
+			case OP_SUB:
+				var RB = frame.reg[INS_B(instruction)];
+				var RC = frame.reg[INS_C(instruction)];
+				frame.reg[INS_A(instruction)] = new LValue("number", RB.value - RC.value);
+				break;
+			case OP_LT:
+				var RB = frame.reg[INS_B(instruction)];
+				var RC = frame.reg[INS_C(instruction)];
+				if(RB.value < RC.value)
+					frame.pc++;
+				break;
 			default:
 				throw "Unhandled opcode: "+INS_OPCODE(instruction);
 			}