This is an automatically generated file.

Part 1

Part 2

def how_does_add_sub_round():
    """Check rounding on add/subtract.

    Returns:
        "rounded", "chopped", "other"
    """

Part 3

    round_add_sub = "other"
    x = ONE - ULP_OF_ONE_MINUS * ULP_OF_ONE_MINUS
    y = ONE + ULP_OF_ONE_PLUS * (ONE - ULP_OF_ONE_PLUS)
    z = ONE_MINUS_ULP - ONE_HALF
    x = (x - ONE_HALF) - z
    y = y - ONE

Part 4

    if (x == ZERO) and (y == ZERO):
        round_add_sub = "chopped"
        print("Add/Subtract appears to be chopped. ")

Part 5

    while flags["add_sub_guard_digit"]:  # JTC TODO jibe with Basic
        x = (ONE_HALF + ULP_OF_ONE_PLUS) * ULP_OF_ONE_PLUS
        y = (ONE_HALF - ULP_OF_ONE_PLUS) * ULP_OF_ONE_PLUS
        x = ONE + x
        y = ONE + y
        x = (ONE + ULP_OF_ONE_PLUS) - x
        y = ONE - y
        if x != ZERO or y != ZERO: break

Part 6

        x = (ONE_HALF + ULP_OF_ONE_PLUS) * ULP_OF_ONE_MINUS
        y = (ONE_HALF - ULP_OF_ONE_PLUS) * ULP_OF_ONE_MINUS
        x = ONE - x
        y = ONE - y
        x = ONE_MINUS_ULP - x
        y = ONE - y
        if x != ZERO or y != ZERO: break

Part 7

        if round_add_sub == "chopped":
            # ***JTC: BASIC 2690 sets R3 = F1 - O2*R3 triggering 3
            # messages when boch chopped and rounded are detected.
            round_add_sub = "other"
        else:
            round_add_sub = "rounded"
        print("Addition/Subtraction appears to round correctly. ")

Part 8

        if not flags["add_sub_guard_digit"]:
            # ***JTC: BUG, annot happen, guard digit is checked above.
            notify("Add/Subtract")
        break  # Execute this block just once, with early exit possible.

Part 9

    if round_add_sub == "other":  # pick up all the odd cases
        print("Addition/Subtraction neither rounds nor chops.")
    return round_add_sub

Part 10