Method and means for block floating point arithmetic

Details Method and means for block floating point arithmetic Method and means for block floating point arithmetic

1987-03-13

1989-10-03

Harkcom, Gary V.

Boots, shoes, and leggings

G06F 738

Patent

active

048721328

ABSTRACT:
Circuitry for use in operating on block floating-point data where all data in a block has a scale factor associated therewith including a maximum scale register for storing the maximum scale factor of the data in a block, a subtractor for obtaining a difference value between the maximum scale factor and a data scale factor as the data is retrieved for operation, and a computer for adjusting the scale of retireved data by the difference prior to operation on the data. As the data in a block is operated on scale overflow is stored and used to adjust subsequent data as read from memory prior to operation thereon. A counter is provided for counting all scale overflow as a result of operations on all data in a block with the maximum scale register being updated based on the total count following operations on all data in the block.

REFERENCES:
patent: 4041461 (1977-08-01), Kratz et al.
patent: 4107773 (1978-08-01), Gilbreath et al.
patent: 4241411 (1980-12-01), Krasner et al.
patent: 4450525 (1984-05-01), Demuth et al.
patent: 4501149 (1985-02-01), Konno et al.
L. Rabiner et al., "Theory and Application of Digital Signal Processing", Prentice-Hall, Inc., 1975, pp. 361-363; 573-579.

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