def divide_int():
'''Divides one integer by another and returns the address of a new integer
equal to the result.
2 Params:
1. The address of an integer (left operand - dividend)
2. The address of another integer (right operand - divisor)'''
N_PARAMS = 2
div_not_zero = CodeGenManager.get_label('div_not_zero')
return [
'_divide_int:',
common.function_prologue(),
'; get the value for the left operand and put it in eax',
common.get_param('eax', 0, N_PARAMS),
common.unwrap_primitive('eax', 'eax'),
'; get the value for the right operand and put in in ebx',
common.get_param('ebx', 1, N_PARAMS),
common.unwrap_primitive('ebx', 'ebx'),
'; check for division by zero:',
'cmp ebx, 0',
'jne {0}'.format(div_not_zero),
'call __exception',
'{0}:'.format(div_not_zero),
common.fill_high_order_bit('eax', 'edx'),
'idiv ebx ; sets eax to edx:eax/ebx',
'; create an int with the result',
'push eax ; the result of div has to be in eax',
'call _create_int',
'pop ebx ; pop param',
'; eax is an integer object with the old value of eax',
common.function_epilogue()
]
def mod_int():
'''Computes the modulus of two integers and returns the address of the result
2 Params:
1. The address of an integer (dividend)
2. The address of an integer (dividend)
'''
N_PARAMS = 2
return [
'_mod_int:',
common.function_prologue(),
'; get the value for the left operand and put it in eax',
common.get_param('eax', 0, N_PARAMS),
common.unwrap_primitive('eax', 'eax'),
'; get the value for the right operand and put in in ebx',
common.get_param('ebx', 1, N_PARAMS),
common.unwrap_primitive('ebx', 'ebx'),
common.fill_high_order_bit('eax', 'edx'),
'idiv ebx ; sets edx to edx:eax mod ebx',
'; create an int with the result',
'push edx ; the result of mod is placed in ebx',
'call _create_int',
'pop ebx ; pop param',
'; eax is an integer object with the old value of edx',
common.function_epilogue()
]
