Loop control circuit and loop control method

Details Loop control circuit and loop control method Loop control circuit and loop control method

2006-07-18

2006-07-18

Pan, Daniel H. (Department: 2183)

Electrical computers and digital processing systems: processing

Processing control

Branching

C712S202000

Reexamination Certificate

active

07080239

ABSTRACT:
A loop control circuit and a loop control method that allow control on multiplexed loop operations to be executed with less overhead are provided. A loop control circuit comprises a means for address storage that stores in memory the address of a loop instruction at a second or subsequent stage in multiplexed loops or the address of the instruction immediately preceding the loop instruction when the loop instruction is executed for the first time, a means for loop instruction recurrence prediction that predicts a recurrence of the loop instruction at the second or subsequent stage by comparing the address of the loop instruction or the address of the instruction immediately preceding the loop instruction stored in memory with a value at a program counter and a means for loop instruction skipping that skips the loop instruction if it is predicted that the loop instruction is to occur next.

REFERENCES:
patent: 4652997 (1987-03-01), Kloker
patent: 5375238 (1994-12-01), Ooi
patent: 6671799 (2003-12-01), Parthasarathy
patent: 6687813 (2004-02-01), Norman et al.
patent: 06-348491 (1994-12-01), None
patent: 09-069046 (1997-03-01), None

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