Introduction to Computer Data Representation


Peter Fenwick

eISBN: 978-1-60805-882-2, 2014
ISBN: 978-1-60805-883-9

Indexed in: EBSCO.

Introduction to Computer Data Representation introduces readers to the representation of data within computers. Starting from basic pr...[view complete introduction]
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Basic Arithmetic and Logic

- Pp. 45-75 (31)

Peter Fenwick


Given that quantities may be represented as bit patterns within the computer, how may these patterns be manipulated to achieve useful results? We look first at the "basic" operations of addition and subtraction in the various binary number representations, extending to addition of multiple-precision values and decimal addition. Then we examine the logical operations, where the bits are "bits", with no numerical significance. Operations here include AND, OR, NOT, XOR, shifting of various types, bit-field operations and, finally, parity.

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