Method for reducing the number of bits needed for the representa

Details Method for reducing the number of bits needed for the representa Method for reducing the number of bits needed for the representa

1997-11-07

1999-12-21

Tokar, Michael

Coded data generation or conversion

Digital code to digital code converters

To or from number of pulses

341 50, 341 67, H03M 740

Patent

active

060055022

ABSTRACT:
A method for reducing the number of bits needed to represent constant values in a data processing device. A group of constant values is defined by selecting them as a function of their statistical frequency of use. Each constant value of this group in the instructions is represented by means of a shorter coded operand field and a current instruction is loaded from a bus in an instruction register. A corresponding operand field is derived from the coded operand field of the current instruction by expansion means, and a bus and an output of the expansion means are selectively connected as input to an arithmetic logic unit.

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"Padding a Microcode Control Word," IBM Technical Disclosure Bulletin, vol. 30, No. 5, Oct. 1987, pp. 79-80.

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