Computer Science – Data Structures and Algorithms
Scientific paper
2012-04-01
Computer Science
Data Structures and Algorithms
Global Journal of Computer Science and Technology, Vol. 9, Issue 5, January 2010
Scientific paper
Many emerging computer applications require the processing of large numbers, larger than what a CPU can handle. In fact, the top of the line PCs can only manipulate numbers not longer than 32 bits or 64 bits. This is due to the size of the registers and the data-path inside the CPU. As a result, performing arithmetic operations such as subtraction on big-integer numbers is to some extend limited. Different algorithms were designed in an attempt to solve this problem; they all operate on big-integer numbers by first converting them into a binary representation then performing bitwise operations on single bits. Such algorithms are of complexity O(n) where n is the total number of bits in each operand. This paper proposes two new algorithms for performing arithmetic subtraction on big-integer numbers. The two algorithms are different in that one is sequential while the other is parallel. The similarity between them is that both follow the same concept of dividing the big-integer inputs into several blocks or tokens of 60 bits (18 digits) each; thus reducing the input size n in O(n) by a factor of 60. Subtraction of corresponding tokens, one from each operand, is performed as humans perform subtraction, using a pencil and a paper in the decimal system. Both algorithms are to be implemented using MS C#.NET 2005 and tested over a multiple processor system. Further studies can be done on other arithmetic operations such as addition and multiplication.
Barbar Aziz
Bassil Youssef
No associations
LandOfFree
Sequential & Parallel Algorithms for Big-Integer Numbers Subtraction does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Sequential & Parallel Algorithms for Big-Integer Numbers Subtraction, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sequential & Parallel Algorithms for Big-Integer Numbers Subtraction will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-552562