example files

Test-Files/BasicLoop.vm

@@ -0,0 +1,22 @@
+// This file is part of www.nand2tetris.org
+// and the book "The Elements of Computing Systems"
+// by Nisan and Schocken, MIT Press.
+// File name: projects/08/ProgramFlow/BasicLoop/BasicLoop.vm
+
+// Computes the sum 1 + 2 + ... + argument[0] and pushes the 
+// result onto the stack. Argument[0] is initialized by the test 
+// script before this code starts running.
+push constant 0    
+pop local 0         // initializes sum = 0
+label LOOP_START
+push argument 0    
+push local 0
+add
+pop local 0	        // sum = sum + counter
+push argument 0
+push constant 1
+sub
+pop argument 0      // counter--
+push argument 0
+if-goto LOOP_START  // If counter > 0, goto LOOP_START
+push local 0