Apparatus for executing instruction regardless of data types and

Details Apparatus for executing instruction regardless of data types and Apparatus for executing instruction regardless of data types and

1988-10-19

1991-09-03

Lee, Thomas C.

Boots, shoes, and leggings

364258, 3642598, 3642613, 3642624, 3642628, 3649371, 364938, 3649475, 3649515, G06F 738, G06F 9302, G06F 9305, G06F 9308

Patent

active

050459929

ABSTRACT:
A method and apparatus for improving the efficiency of executing arithmetic and logical operations performed on arguments provided during the execution of computer instructions in which operands include a variable type argument or data portion accompanied by a tag identifier which defines the data type. The processing of the data is enhanced by the addition of two condition codes derived from the values of the pre-ALU tag identifiers and the post-ALU results. The condition codes allow rapid determination of data types without additional execution cycles or hardware overhead, resulting in enhanced execution of the instructions.

REFERENCES:
patent: 4068299 (1978-01-01), Backman
patent: 4241397 (1980-12-01), Strecker et al.
patent: 4445177 (1984-04-01), Bratt et al.
patent: 4467409 (1984-08-01), Potash et al.
patent: 4491908 (1985-01-01), Woods et al.
patent: 4757445 (1988-07-01), Zolnowsky et al.
patent: 4785393 (1988-11-01), Chu et al.
patent: 4797808 (1989-01-01), Bellay et al.

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