From a000308104aab27c2dde9a306f1bc654b2db4806 Mon Sep 17 00:00:00 2001 From: Yuchen Pei Date: Wed, 29 Nov 2017 12:30:41 +0100 Subject: first commit --- projects/08/ProgramFlow/BasicLoop/BasicLoop.vm | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) create mode 100644 projects/08/ProgramFlow/BasicLoop/BasicLoop.vm (limited to 'projects/08/ProgramFlow/BasicLoop/BasicLoop.vm') diff --git a/projects/08/ProgramFlow/BasicLoop/BasicLoop.vm b/projects/08/ProgramFlow/BasicLoop/BasicLoop.vm new file mode 100644 index 0000000..2d63f13 --- /dev/null +++ b/projects/08/ProgramFlow/BasicLoop/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 -- cgit v1.2.3