def modulo(c, m):
"""Modulo statement. For instance:
al %= 6
"""
dst = Operand(c, m.group(1))
src = Operand(c, m.group(2))
if src.value == 0:
raise ValueError('Cannot perform modulo 0')
if src.value < 0:
raise ValueError('Negative modulo not implemented')
if src.value is not None and is_power_of_2(src.value):
# AND optimization: modulo is a power of 2
# We only need to mask with 111… until its power.
# For instance:
# 1000 (8) - 1 = 111 (7)
#
# So n % 8, e.g., 100101, is as simple as masking with 111 -> 101
mask = src.value - 1
c.add_code(f'and {dst}, {mask}')
return
perform_divide(c, dst, src, result_in8='ah', result_in16='dx')
def if_(c, m):
"""If control flow statement. For instance:
if ax < 5 {
; code
}
if cx is even {
; code
}
"""
a = Operand(c, m.group(1))
comparision = m.group(2)
b = Operand(c, m.group(3))
even_odd = m.group(4)
label = c.get_uid(m.group(5))
if even_odd is None:
c.add_code([f'cmp {a}, {b}', f'{ctoi[comparision]} {label}'])
else:
# If even, then bit is 0, then jump to skip if not zero
# If odd, then bit is 1, then jump to skip if zero
jump = 'jnz' if even_odd == 'even' else 'jz'
c.add_code([f'test {a}, 1', f'{jump} {label}'])
c.add_pending_code(f'{label}:')
def while_(c, m):
"""While control flow statement. For instance:
while bx < 4 {
; code
}
To force at least one iteration
while dx > 7 or once {
; code
}
"""
a = Operand(c, m.group(1))
comparision = m.group(2)
b = Operand(c, m.group(3))
label = c.get_uid(m.group(5))
labelstart = label + '_s'
labelend = label + '_e'
if m.group(4) is None:
# 'or once' is not present, we might not need to enter the loop
c.add_code([f'cmp {a}, {b}', f'{ctoi[comparision]} {labelend}'])
c.add_code(f'{labelstart}:')
# Reenter the loop if condition is met
c.add_pending_code(
[f'cmp {a}, {b}', f'{cti[comparision]} {labelstart}', f'{labelend}:'])
def setcursor(c, m):
"""Sets the cursor on screen. For instance:
setcursor(8, 20)
"""
# TODO Possibly add support for inlining
setc = define_set_cursor(c)
row, col = Operand.parseint(m.group(1)), Operand.parseint(m.group(2))
# Assertion
if row is not None and not 0 <= row < 256:
raise ValueError('The row for setcursor must be between 0 and 255')
if col is not None and not 0 <= col < 256:
raise ValueError('The column for setcursor must be between 0 and 255')
# Assertion passed, save the previous value
c.add_code(f'push dx')
# Special case: both integer values known
if row is not None and col is not None:
c.add_code(f'mov dx, {(row << 8) | col}')
else:
# Need to move manually
helperassign(c, 'dh', m.group(1))
helperassign(c, 'dl', m.group(2))
c.add_code([
f'call {setc.name}',
f'pop dx'
])
def check_for_arrows(image, equation, ncp, ind):
x0, y0, h0, w0, x, y, w, h, x1, y1, w1, h1 = get_coords_of_adjacent(
ncp, ind)
if math.fabs(x - x0) < 0.4 * w and math.fabs((x0 + w0) -
(x + w)) < 0.4 * w and y0 < y:
obj = Operand(x=x,
y=y,
top=Operand(x=x0,
y=y0,
image=image[y0:y0 + h0, x0:x0 + w0]),
image=image[y:y + h, x:x + w])
equation.add_operand(obj)
return True
elif math.fabs(x - x1) < 0.4 * w and math.fabs(
(x1 + w1) - (x + w)) < 0.4 * w and y1 < y:
obj = Operand(x=x,
y=y,
top=Operand(x=x1,
y=y1,
image=image[y1:y1 + h0, x1:x1 + w1]),
image=image[y:y + h, x:x + w])
equation.add_operand(obj)
return True
else:
equation.add_operand(Operand(x=x, y=y, image=image[y:y + h, x:x + w]))
return False
def divide(c, m):
"""Division statement. For instance:
al /= 4
"""
dst = Operand(c, m.group(1))
src = Operand(c, m.group(2))
if src.value == 0:
raise ValueError('Cannot divide by 0')
if src.value and abs(src.value) == 1:
# One optimization: do nothing or negate
if src.value < 0:
c.add_code(f'neg {dst}')
return
if src.value is not None:
# Bit shift optimization: divisor is a small multiple of 2
# http://zsmith.co/intel_d.html#div or
# http://zsmith.co/intel_n.html#neg and http://zsmith.co/intel_s.html#sar
if dst.is_reg or dst.size == 8:
limit = 80
else:
limit = 150
if dst.is_reg:
if src.value < 0:
cost = 3 + 8 + 4 * (-src.value)
else:
cost = 8 + 4 * src.value
if dst.is_mem:
if src.value < 0:
cost = 16 + 20 + 4 * (-src.value)
else:
cost = 20 + 4 * src.value
# Now we know our limit, beyond which division is easier
# and the cost per shift, so we know which values we can use
if cost < limit:
# The cost of negating and shifting is less, so we'll do that
amount = limit // cost
powers = [2**i for i in range(1, amount + 1)]
if abs(src.value) in powers:
# We have a power of two, so perform we can use bit shift
if src.value < 0:
c.add_code(f'neg {dst}')
src.value = -src.value
count = int(src.value ** 0.5)
c.add_code(f'sar {dst}, {count}')
return
perform_divide(c, dst, src,
result_in8='al',
result_in16='ax')
def __init__(self,
inputPipe=None,
config={},
simulation=False,
dataManager=None):
self.traders = []
self.config = config
self.input = inputPipe
self.simulation = simulation
self.zero = Operand(d=0)
self.one = Operand(d=1)
self.dataManager = dataManager
self.initialize()
def get_operands(self, csv):
"""Converts the possibly comma separated values to a
list of operands (inmediate, registers and variables
"""
if isinstance(csv, list):
return [
v if isinstance(v, Operand) else Operand(self, v) for v in csv
]
if isinstance(csv, Operand):
return [csv]
return [Operand(self, v) for v in Operand.get_csv(csv)]
def get_operation(self, arg):
if (type(arg) is str):
#it is an operation
operation = create_operation(data=json.loads(arg),
dataline=self.dataManager)
return operation
elif (type(arg) is float or type(arg) is int):
#return the integer or float as it is
return Operand(d=arg)
elif (type(arg) is list):
return Operand(d=0)
elif (arg is None):
#return 0
return Operand(d=0)
def run(self, data):
d = {
'price': data['lastPrice'],
'time': data['time'],
'token': data['token'],
'lastPrice': data['lastPrice'] # TODO change to common as price
}
if (data.get('isCandle')):
d.update({
'open': data['open'],
'high': data['high'],
'low': data['low'],
'close': data['close'],
'interval': data['interval'],
'isCandle': data['isCandle']
})
#TODO change this as soon as you can !important
true = Operand(d=True)
begin = (self.begin_on.update(d) == true).d
end = (self.end_on.update(d) == true).d
r = self.update(d)
if (begin and not end):
if (self.phase == 'sleeping'):
self.begin(d)
self.phase = 'running'
if (data.get('noTrade')):
return None
return r
if (begin and end and self.phase == 'running'):
self.end(d)
self.phase = 'sleeping'
return None
def dualoperands(c, m):
"""Operations with two operands statement. For instance:
ax |= bx ; Bitwise OR
dx ^= cx ; Bitwise XOR
ax &= bx ; Bitwise AND
dx += cx ; Integer addition
ax -= bx ; Integer subtraction
"""
op = m.group(2)
dst = Operand(c, m.group(1))
src = Operand(c, m.group(3))
if src.value == 1 and op in translation1:
c.add_code(f'{translation1[op]} {dst}')
else:
helperoperate(c, translation[op], dst, src)
def __init__(self, name, vartype, value, vector_size=None):
self.name = name
# Variable offset in memory, set by the compiler state
self.offset = None
self.length = 1
# 'vector_size' should be None for non-vector types
self.is_vector = vector_size is not None
if self.is_vector:
if vector_size < 1:
raise ValueError('Vector size must be ≥ 1')
self.value = Operand.get_csv(value)
self.length = vector_size
# One value is OK with any vector size, 'dup()' is assumed
if len(self.value) != 1 and self.length != len(self.value):
raise ValueError(
f'Specified vector length ({self.length}) and supplied '
f'values count ({len(self.value)}) do not match')
else:
# Not a vector, so save its single value
self.value = value.strip()
# Name and vector handled, now define the type
self.type = vartype
# Type defined, now determine its code
self.is_constant = vartype == 'const'
if self.is_constant:
if self.is_vector:
raise ValueError('Cannot define a constant vector')
self.typecode = None
else:
if vartype == 'byte':
self.typecode = 'DB'
self.size = 8
elif vartype == 'short':
self.typecode = 'DW'
self.size = 16
elif vartype == 'string':
if self.is_vector:
raise ValueError('Cannot define a vector of strings')
self.typecode = 'DB'
self.size = 8
self.value, self.length = self.escape_string(value)
else:
raise ValueError(f'Unknown variable type "{vartype}"')
def repeat(c, m):
"""Repeat control flow statement. For instance:
repeat 10 with cx {
; code
}
"""
count = Operand(c, m.group(1))
used = Operand(c, m.group(2))
label = c.get_uid(m.group(3))
labelstart = label + '_s'
labelend = label + '_e'
# Initialize our loop counter
helperassign(c, used, count)
# Sanity check, if 0 don't enter the loop unless we know it's not 0
# This won't optimize away the case where the value is 0
if count.value is None or count.value <= 0: # count unknown or zero
c.add_code([
f'test {used}, {used}',
f'jz {labelend}'
])
# Add the start label so we can jump here
c.add_code(f'{labelstart}:')
if used.code == 'cx':
# We can use 'loop' if using 'cx'
c.add_pending_code([
f'loop {labelstart}',
f'{labelend}:'
])
else:
c.add_pending_code([
f'dec {used}',
f'jnz {labelstart}',
f'{labelend}:'
])
def __init__(self, name, params, returns=None, mangle=True):
# Convert a comma separated list to normal parameters if required
self.params = Operand.get_csv(params)
# Name mangling, add as many underscores as parameter count
if mangle:
self.name = self.mangle(name, len(self.params))
else:
self.name = name
# Where the value is returned
self.returns = returns
# Used to store the code of the function
self.code = []
def putchar(c, m):
"""Puts a character on the screen. For instance:
put char 'L'
put digit cx
"""
# TODO Possibly add support for not inlining
src = Operand(c, m.group(2))
c.add_code('push ax')
helperassign(c, 'al' if src.size == 8 else 'ax', src)
if m.group(1) == 'digit':
c.add_code("add al, '0'")
c.add_code([
'mov ah, 14',
'int 10h',
'pop ax'
])
def variable(c, m):
"""Variable or constant definition. For instance:
byte little = 42
short big = 1234
byte[5] vector1
byte[] vector2 = 1, 2, 3, 4, 5
const VALUE = 7
"""
# TODO Perform more checks to ensure the value is correct
vartype = m.group(1)
vector_size = m.group(2)
name = m.group(3)
value = m.group(4)
if not value:
value = '?'
if vector_size is None:
# Single item variable
c.add_variable(Variable(name=name, vartype=vartype, value=value))
else:
# We have a vector, get the comma-separated values
values = Operand.get_csv(value)
# Determine its size (remove '[]' by slicing) if given
vector_size = vector_size[1:-1].strip()
if vector_size:
vector_size = int(vector_size)
else:
if value == '?':
raise ValueError('A list of values must be supplied when '
'no vector size is specified')
vector_size = len(values)
c.add_variable(
Variable(name=name,
vartype=vartype,
value=values,
vector_size=vector_size))
def multiply(c, m):
"""Multiplication statement. For instance:
al *= 7
"""
dst = Operand(c, m.group(1))
src = Operand(c, m.group(2))
if src.value == 0:
# Zero optimization: second product is 0
if dst.is_mem:
c.add_code(f'and {dst}, 0')
else:
c.add_code(f'xor {dst}, {dst}')
return
if src.value and abs(src.value) == 1:
# One optimization: do nothing or negate
if src.value < 0:
c.add_code(f'neg {dst}')
return
if src.value is not None:
# Bit shift optimization: second product is a small multiple of 2
# http://zsmith.co/intel_m.html#mul or
# http://zsmith.co/intel_n.html#neg and http://zsmith.co/intel_s.html#sal
if dst.is_reg or dst.size == 8:
limit = 70
else:
limit = 124
if dst.is_reg:
if src.value < 0:
cost = 3 + 8 + 4 * (-src.value)
else:
cost = 8 + 4 * src.value
if dst.is_mem:
if src.value < 0:
cost = 16 + 20 + 4 * (-src.value)
else:
cost = 20 + 4 * src.value
# Now we know our limit, beyond which multiplication is easier
# and the cost per shift, so we know which values we can use
if cost < limit:
# The cost of negating and shifting is less, so we'll do that
amount = limit // cost
powers = [2**i for i in range(1, amount + 1)]
if abs(src.value) in powers:
# We have a power of two, so perform we can use bit shift
if src.value < 0:
c.add_code(f'neg {dst}')
src.value = -src.value
count = int(src.value**0.5)
c.add_code(f'sal {dst}, {count}')
return
# We're likely going to need to save some temporary variables
# No 'push' or 'pop' are used because 'ah *= 3', for instance, destroys 'al'
# 'al' itself can be pushed to the stack, but a temporary variable can hold
tmps = TmpVariables(c)
# We will define 'dst, src, fa1, fa2' as:
# dst *= src
# fa1 *= fa2
large_multiply = max(dst.size, src.size) > 8
if large_multiply:
# 16-bits mode, so we use 'ax' as the first factor
fa1 = 'ax'
# The second factor cannot be an inmediate value neither 'ax'
if src.code[0] == 'a' and src.code[-1] in 'xhl' \
or src.value is not None:
fa2 = 'dx'
else:
fa2 = src.code
# Determine which registers we need to save
saves = []
# al *= 260
# ^ dst
#
# ax *= 260
# ^ used
#
# dst ≠ used, used gets saved
# Special case where we want to use al/ah as destination
# We're using ax for multiplication, so we can't save the whole
if dst[0] == 'a' and dst[-1] in 'hl':
saves.append('al' if dst.code == 'ah' else 'ah')
elif dst.code != fa1:
# Save fa1 unless it's the destination
saves.append(fa1)
# Save fa2 unless it's the destination
if dst.code != fa2:
saves.append(fa2)
# Save the used registers
tmps.save_all(saves)
# Load the factors into their correct location
helperassign(c, [fa1, fa2], [dst, src])
# Perform the multiplication
c.add_code(f'mul {fa2}')
# Move the result, 'ax', to wherever it should be
helperassign(c, dst, 'ax')
# Restore the used registers
tmps.restore_all()
else:
# 8-bits mode, so we use 'al' as the first factor
fa1 = 'al'
# The second factor cannot be an inmediate value neither 'al'
fa2 = src.code if src.value is None and src.code != 'al' else 'ah'
# Determine which registers we need to save
saves = []
# Save fa1 unless it's the destination
if dst.code != fa1:
saves.append(fa1)
# Save fa2 if we moved it (thus it's not the same)
# unless it's be overrode if it is the destination
if src.code != fa2 and dst.code != fa2:
saves.append(fa2)
# Save the used registers
tmps.save_all(saves)
# Load the factors into their correct location
helperassign(c, [fa1, fa2], [dst, src])
# Perform the multiplication
c.add_code(f'mul {fa2}')
# Move the result, 'al', to wherever it should be
helperassign(c, dst, 'al')
# Restore the used registers
tmps.restore_all()
def printf(c, m):
"""Prints a string with optional formatted values. For instance:
printf "I'm %d years old, you %d" % ax, bx
printf stringVariable
"""
# TODO Possibly add support for not inlining
# Inlining really shines when there are actually formatted values:
#
# If inlining:
# 5 instructions; push/pop ax/dx, mov ah 9
# + 2n (where n is the number of strings, lea + int)
#
# If not inlining (the first 7 are only written once, ran many times):
# 7n instructions; function definition, push/pop ax, mov ah 9, int
# + 2 instructions; push/pop dx
# + 2n (where n is the number of strings, lea + int)
#
# Retrieve the captured values
string = m.group(1)
args = c.get_operands(m.group(2))
var = m.group(3)
# Save the registers used for calling the print interruption
c.add_code(['push ax', 'push dx'])
# string/args and var are mutually exclusive
if var:
op = Operand(c, var, assert_vector_access=False)
if op.is_mem:
# Using a variable, load and call the interruption
if op.type == 'string':
c.add_code(f'lea dx, {op}')
else:
load_integer(c, op.code)
c.add_code([f'mov ah, 9', f'int 21h'])
elif op.is_reg:
# Using a register, which means we need to load an integer
load_integer(c, op)
c.add_code([f'mov ah, 9', f'int 21h'])
else:
# Assume inmediate integer value
c.add_code(f'mov ah, 9')
define_and_print(c, f'"{op.name}"')
else:
# Captured a string, with possibly formatted arguments
#
# Since 'ax' and 'dx' are needed for printing, we need to save them.
# We could use the stack, however, we would need to push as many times
# as we encountered one of the offending registers. Also, the stack
# doesn't support the 8-bit versions of these registers, so we simply
# use a temporary variable.
tmps = TmpVariables(c)
for a in args:
if is_ax_or_dx_variant(a):
tmps.save(a)
# After we saved the values we may later need, set up the print function
c.add_code('mov ah, 9')
# Now, we have the right string and the arguments used
if args:
# 1. Find %X's
substrings = re.split(r'%[sd]', string)
arg_types = re.findall(r'%[sd]', string)
# 2. Print: substring, formatted, substring, formatted, etc.
for i in range(len(substrings)):
if i > 0:
# Format the arguments, skipping 1 normal string (thus -1)
op = args[i - 1]
format_type = arg_types[i - 1]
# Load the argument into 'dx' depending on its type
#
# This assumes that the user entered the right type
# TODO Don't assume that the user entered the right type
if format_type == '%s':
c.add_code(f'lea dx, {op}')
elif format_type == '%d':
if op in tmps:
# Special, this was saved previously
load_integer(c, tmps[op])
c.add_code('mov ah, 9')
else:
load_integer(c, op)
else:
raise ValueError(
f'Regex should not have allowed {format_type}')
# Call the interruption to print the argument
c.add_code(f'int 21h')
# Argument formatted, print the next part of the string
define_and_print(c, substrings[i])
else:
# No arguments at all, a define and load will do
define_and_print(c, string)
# All done, restore the original dx/ax values
c.add_code(['pop dx', 'pop ax'])
def divmod_(c, m):
"""Division & Modulo statement. For instance:
ax, dx = divmod bx, 7
After this operation takes place, the values will be:
ax = bx / 7 ; (integer division)
dx = bx % 7 ; (bx modulo 7)
"""
a = Operand.parseint(m.group(3))
b = Operand.parseint(m.group(4))
if a is not None and b is not None:
# Both are integers, we can optimize this away
# and just plug the right values in
a, b = divmod(a, b)
helperassign(c, m.group(1), a)
helperassign(c, m.group(2), b)
else:
# Need to perform the operation
quotient = m.group(1)
remainder = m.group(2)
dividend = m.group(3)
divisor = m.group(4)
# TODO Support for AH/AL (8 bits division mode)
# Only AX and DX will be affected, so unless we're
# assigning a result to them, they need to be pushed
push_ax = quotient != 'ax' and remainder != 'ax'
push_dx = quotient != 'dx' and remainder != 'dx'
if push_ax:
c.add_code('push ax')
if push_dx:
c.add_code('push dx')
push_divisor = False
# Determine the divisor to be used, it cannot be 'dx' since
# it has to be zero because it's taken into account when dividing,
# and it cannot be 'ax' because it's where the dividend is
#
# The divisor cannot be an inmediate value either ('b' not None)
if divisor in ['ax', 'dx'] or b is not None:
# Pick either the quotient or remainder (will be overwritten later)
if quotient not in ['ax', 'dx']:
used_divisor = quotient
elif remainder not in ['ax', 'dx']:
used_divisor = remainder
else:
# No luck, use 'bx' for instance (we need to save it)
used_divisor = 'bx'
push_divisor = True
c.add_code('push bx')
# Update whatever register we used
helperassign(c, used_divisor, divisor)
else:
# We have the right value for the divisor, no move required
used_divisor = divisor
# Divisor set up, neither in 'ax' nor 'dx' so it's OK
# Now set up the dividend, which must always be in 'ax'
helperassign(c, 'ax', dividend)
# Everything set, perform the division
c.add_code([
f'xor dx, dx', # Upper bits are considered!
f'div {used_divisor}'
])
if push_divisor:
# Division done, restore our temporary register
c.add_code('pop bx')
# Now move the result if required
# Special case, 'ax' and 'dx are swapped
if quotient == 'dx' and remainder == 'ax':
c.add_code(['push ax', 'mov ax, dx', 'pop dx'])
else:
# Although helperassign would take care of these, we can
# slightly optimize away the otherwise involved push/pop
#
# TODO Actually, perhaps helper assign could note this and
# swap the order of assignment
if quotient == 'dx':
# Special case, we need to move remainder, in 'dx', first
helperassign(c, [remainder, quotient], ['dx', 'ax'])
else:
# Normal case, first 'ax', then 'dx'
helperassign(c, [quotient, remainder], ['ax', 'dx'])
if push_dx:
c.add_code('pop dx')
if push_ax:
c.add_code('pop ax')
def helperoperate(c, op, dst, src):
"""Helper operation with support to operate on any value
(memory or not) of the form 'instruction dst, src'
"""
if not isinstance(dst, Operand):
dst = Operand(c, dst)
if not isinstance(src, Operand):
src = Operand(c, src)
# Sanity check: destination cannot be an inmediate value
if dst.value is not None:
raise ValueError(
f'Cannot {op} "{src.name}" to the inmediate value "{dst.name}"')
# If the source has an integer value, make sure it fits on destination
if src.value is not None:
if src.size > dst.size:
raise ValueError(f'"{src.name}" is too big to fit in "{dst.name}"')
# It's an okay inmediate value, simply operate and early exit
c.add_code(f'{op} {dst}, {src}')
return
# Special case where both are memory, we need to use a temporary
# register ('ax' for instance); recursive calls to helperoperate()
# will then take care of the cases where operating with memory + 'ax'
if dst.is_mem and src.is_mem:
# # # [Case memory to memory]
# TODO Perhaps we could use a temporary variable instead of the
# stack to pick either AL or AX (which is better suited)
c.add_code('push ax')
helperassign(c, 'ax', src)
helperoperate(c, op, dst, 'ax')
c.add_code('pop ax')
return
# Now that we know the size, and that not both are memory,
# we can get our hands dirty
if dst.size == src.size:
# # # [Case same size]
# Both sizes are the same, we can directly operate (unless 'mov')
if op != 'mov' or dst != src:
c.add_code(f'{op} {dst}, {src}')
elif dst.size < src.size:
# The destination is smaller, we have to ignore the high part
if src.is_mem or src.low is None:
# # # [Case large memory/register to small register]
# The source is memory, then the destination is a register
#
# We need an auxiliary register because we don't want to
# touch the other part (either of r'[HL]'), and we can't
# pop a masked value not to lose the rest
#
# This is also the case when the source is not memory, but
# the register doesn't support accessing r'[HL]'
#
# Use either 'dx' or 'ax' as auxiliar register (arbitrary
# as long as it doesn't match the one we want to move to)
aux = 'dx' if dst[0] == 'a' else 'ax'
c.add_code(f'push {aux}')
helperassign(c, aux, src)
helperoperate(c, op, dst, f'{aux[0]}l')
c.add_code(f'pop {aux}')
else:
# # # [Case large register to small register/memory]
# We know that we have acces to the low part since it was
# checked above, otherwise we would have needed that
# auxiliary to be able to pick only the low part
helperoperate(c, op, dst, src.low)
else:
# The destination is larger, we need to mask the high part.
# The only case where this is possible is on r'[ABCD][HL]',
# so we already know that we have access to the 'X' version
# unless the source is memory
if src.is_mem:
# # # [Case small memory to large register]
# Check if the register supports accessing to the r'[HL]'
# Otherwise we need to use a temporary register such as 'ax'
if dst.low is None:
c.add_code(f'push ax')
c.add_code(f'xor ah, ah')
helperassign(c, 'al', src)
helperoperate(c, op, dst, 'ax')
c.add_code(f'pop ax')
else:
c.add_code(f'xor {dst.high}, {dst.high}')
helperoperate(c, op, dst.low, src)
elif dst.is_mem:
# # # [Case small register to large memory]
# All the 8 bit registers support accessing to 'X', so we
# can just mask away the high part, move it and restore
c.add_code(f'push {src.full}')
# We might need to move the high to the low part before masking
if src[-1] == 'h':
helperassign(c, src.low, src.high)
c.add_code(f'xor {src.high}, {src.high}')
helperoperate(c, op, dst, src.full)
c.add_code(f'pop {src.full}')
else:
# # # [Case small register to large register]
if src[-1] == 'l':
# We're using the low part, we can directly copy
# and then mask the high part with AND or XOR
helperoperate(c, op, dst, src.full)
if dst.high is None:
c.add_code(f'and {dst}, 0xff')
else:
c.add_code(f'xor {dst.high}, {dst.high}')
else:
# We want to assign the src = YH, but it's 8-bits
if dst.low is None:
# No support to move the 8-bits directly, we need
# to save the value, move it, mask it, and move it
c.add_code(f'push {src.full}')
helperassign(c, src.low, src)
c.add_code(f'xor {src}, {src}')
helperoperate(c, op, dst, src.full)
c.add_code(f'pop {src.full}')
else:
# Destination supports 8-bits access so we can
# directly move those and mask away the high part
helperoperate(c, op, dst.low, src)
c.add_code(f'xor {dst.high}, {dst.high}')
