Chaining and hazard apparatus and method

Details Chaining and hazard apparatus and method Chaining and hazard apparatus and method

1988-05-16

1990-06-19

Smith, Jerry

Boots, shoes, and leggings

364736, 364200, 371 691, G06F 1128

Patent

active

049358499

ABSTRACT:
An apparatus and method for detecting data conflicts in a computer system and for throttling execution of instructions where data conflicts exist. The present invention comprises circuitry for detecting data conflict problems in a computer system. The circuit of the present invention comprises a plurality of registers associated with each processor in the system. The registers are used to store a range of elements to be written by the associated processor and a plurality of ranges of elements to be read by the associated processor. These ranges are then compared against data accesses by other processors in the computer system and where a data conflict exists, a circuit is provided for determining which processor will be allowed to continue processing and which processor will be prevented from continuing processing. The circuitry ensures the processor completes processing of instructions in a logical manner giving expected results.

REFERENCES:
patent: 4339808 (1982-07-01), North
patent: 4532589 (1985-07-01), Shintani
patent: 4594655 (1986-06-01), Hao
patent: 4768148 (1988-08-01), Keeley
patent: 4777592 (1988-10-01), Yano
patent: 4777593 (1988-10-01), Yoshida
patent: 4789925 (1988-12-01), Lahti

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