def write_greater_then_command(line_def):
if line_def['arg'][0] != 'gt':
return
primitive_ml.read_stack_to('D')
# a > b => a - b > 0 => m=a d=b
primitive_ml.read_stack_and_write('D', 'M-D')
primitive_ml.write_bool_jumps('JGT')
def write_or_command(line_def):
if line_def['arg'][0] != 'or':
return
primitive_ml.read_stack_to('D')
primitive_ml.read_stack_and_write('M', 'D|M')
def write_neg_command(line_def):
if line_def['arg'][0] != 'neg':
return
primitive_ml.read_stack_and_write('M', '-M')
def write_and_command(line_def):
if line_def['arg'][0] != 'and':
return
primitive_ml.read_stack_to('D')
primitive_ml.read_stack_and_write('M', 'M&D')
def write_add_command(line_def):
if line_def['arg'][0] == 'add':
primitive_ml.read_stack_to('D')
primitive_ml.read_stack_and_write('M', 'M+D')
def write_eq_command(line_def):
if line_def['arg'][0] != 'eq':
return
primitive_ml.read_stack_to('D')
primitive_ml.read_stack_and_write('D', 'D-M')
primitive_ml.write_bool_jumps('JEQ')
def write_less_then_command(line_def):
if line_def['arg'][0] != 'lt':
return
primitive_ml.read_stack_to('D')
primitive_ml.read_stack_and_write('D', 'M-D')
primitive_ml.write_bool_jumps('JLT')