Method and apparatus for identifying the precision of an operand

Details Method and apparatus for identifying the precision of an operand Method and apparatus for identifying the precision of an operand

1986-06-12

1989-07-11

Harkcom, Gary V.

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364745, G06F 738

Patent

active

048478024

ABSTRACT:
An arithmetic logic unit (ALU) and a plurality of operand registers wherein each of the operand registers includes a tag cell for storing a bit identifying the precision of the operand stored therewith. In operation operands are transferred to and from the ALU together with their precision tag to facilitate processing of the operands in the ALU without the need for special software to keep track of the precision of the individual operands.

REFERENCES:
patent: 3742198 (1973-06-01), Morris
patent: 3930232 (1975-12-01), Wallach et al.
patent: 4258429 (1981-03-01), Raymond, Jr.
patent: 4338675 (1982-07-01), Palmer et al.
patent: 4449196 (1984-05-01), Pritchard
patent: 4603323 (1986-07-01), Hassitt et al.
Introducing the SP50 Family, Philips Electronics, Jan. 1986.
Fujitsu General Purpose Digital Signal Processor MB8764, Fujitsu, Dec. 1985, Santa Clara, Calif.
.mu.PD7281 Image Pipelined Processor, NEC Electronics pp. 1-12, May 1985 Mountain View, Calif.

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