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ad8ec8a | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 | from runtime.types import Integer, IntegerOverflow, InvalidArgument, DivisionByZero
def add_checked(a: Integer, b: Integer, width: int = None, signed: bool = True) -> Integer:
res = a.value + b.value
if width is not None:
_check_range(res, width, signed, "add")
return Integer(res)
def add_unchecked(a: Integer, b: Integer) -> Integer:
return Integer(a.value + b.value)
def sub_checked(a: Integer, b: Integer, width: int = None, signed: bool = True) -> Integer:
res = a.value - b.value
if width is not None:
_check_range(res, width, signed, "sub")
return Integer(res)
def mul_checked(a: Integer, b: Integer, width: int = None, signed: bool = True) -> Integer:
res = a.value * b.value
if width is not None:
_check_range(res, width, signed, "mul")
return Integer(res)
def div(a: Integer, b: Integer) -> Integer:
if b.value == 0:
raise DivisionByZero("division by zero")
return Integer(a.value // b.value)
def mod(a: Integer, b: Integer) -> Integer:
if b.value == 0:
raise DivisionByZero("mod by zero")
return Integer(a.value % b.value)
def powi(a: Integer, b: Integer) -> Integer:
if b.value < 0:
raise InvalidArgument("negative exponent for integer pow")
return Integer(pow(a.value, b.value))
def _check_range(val, width, signed, op):
if signed:
lo, hi = -(1 << (width - 1)), (1 << (width - 1)) - 1
else:
lo, hi = 0, (1 << width) - 1
if not (lo <= val <= hi):
raise IntegerOverflow(f"{op} overflow: {val} not in [{lo},{hi}]")
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