Skip to content

Latest commit

 

History

History
111 lines (106 loc) · 1.43 KB

README.md

File metadata and controls

111 lines (106 loc) · 1.43 KB
Raw

hack-vm-translator

Translates Hack VM code into Hack assembly.

Features:

  • Stack arithmetic
  • Function call and return
  • Branching
  • Static variables

Usage

Run with cargo:

cargo run -- <file_name>.vm
# or
cargo run -- <dir> # translates <dir>/*.vm to a single <dir>.asm

See the test directory for some sample .vm code.

Examples

cargo run -- test/FunctionCalls/SimpleFunction/SimpleFunction.vm

SimpleFunction.vm

// Performs a simple calculation and returns the result.
// argument[0] and argument[1] must be set by the caller of this code.
function SimpleFunction.test 2
  push local 0
  push local 1
  add
  not
  push argument 0
  add
  push argument 1
  sub
  return

SimpleFunction.asm

(SimpleFunction.test)
D=0
@SP
A=M
M=D
@SP
M=M+1
D=0
@SP
A=M
M=D
@SP
M=M+1
// push local 0
@0
D=A
@LCL
A=M+D
D=M
@SP
A=M
M=D
@SP
M=M+1
// push local 1
@1
D=A
@LCL
A=M+D
D=M
@SP
A=M
M=D
@SP
M=M+1
// add
@SP
M=M-1
A=M
D=M
@R13
M=D
@SP
M=M-1
A=M
D=M
@R13
D=D+M
@SP
A=M
M=D
@SP
M=M+1
// not
@SP
M=M-1
A=M
D=M
D=!D
@SP
A=M
M=D
@SP
M=M+1
...

Simulator

A CPU simulator for the Hack Computer is available here.

Documentation

See Chapter 7-8 of The Elements of Computing Systems: Building a Modern Computer from First Principles for the full specification of the Hack Virtual Machine.