Digital Arithmetic

Exercises

45

1.18

1.19

1.20

1.21

1.22

1.23

1.24

1.25

smaller). Indicate whether the same instructions can be used if the comparison

was done on unsigned integers or on signed integers. If not, determine how the

flags would be used by the branch instructions in each case.

Algorithms for Range Extension and Arithmetic Shifts

Given the digit-vectors A = (7, 3, 6, 2) and B = (3, 2, 1, 6):

(a) Determine the integers represented in a range complement decimal system

and in a digit complement decimal system.

(b) Extend the vectors to six digits; that is, represent the same numbers using

six digits.

(c) Obtain the representation for ...