diff options
| author | Frederick Yin <fkfd@fkfd.me> | 2022-08-16 11:54:23 +0800 |
|---|---|---|
| committer | Frederick Yin <fkfd@fkfd.me> | 2022-08-16 11:54:23 +0800 |
| commit | 9542deeb483a00b6fabed7574720926ce97d7511 (patch) | |
| tree | 0f2c1f72c03dd4693fd59df67544d2a4dddc5494 /projects/08/ProgramFlow/BasicLoop/BasicLoop.vm | |
| parent | 9c0cb1d1c32724fc95ac9548e4f8d873d3adaccc (diff) | |
Projects, 01-06 completed
Diffstat (limited to 'projects/08/ProgramFlow/BasicLoop/BasicLoop.vm')
| -rw-r--r-- | projects/08/ProgramFlow/BasicLoop/BasicLoop.vm | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/projects/08/ProgramFlow/BasicLoop/BasicLoop.vm b/projects/08/ProgramFlow/BasicLoop/BasicLoop.vm new file mode 100644 index 0000000..dc5a92f --- /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
|