Branch control circuit

Details Branch control circuit Branch control circuit

1990-10-15

1994-03-15

Eng, David Y.

Boots, shoes, and leggings

364380, 3642613, 364DIG1, 364DIG2, G06F 922, G06F 942

Patent

active

052952487

ABSTRACT:
A branch prediction control circuit has a register. A main memory provides a machine language instruction to the register and an instruction buffer. The prediction control circuit decodes the instruction held in the register and predicts whether or not the branch is taken. If the instruction is a relative branch instruction, a sum of the address of the instruction and a displacement included in the instruction is computed to provide a branch address. At the same time, a branch address valid signal is provided. With this arrangement, reliable branch prediction of the relative branch instruction is realized with a small amount of hardware.

REFERENCES:
patent: 3764988 (1973-10-01), Onishi
Rodnay Zaks, "Programming the Z80" 1982 Sybex Inc. p. 290.
Branch-Processing Instruction Cache, IBM Technical Disclosure Bulletin, vol. 29, No. 1, Jun. 1986, New York US pp. 357-359.
A Study of Branch Prediction Strategies, J. Smith, The 8th Annual Symposium On Computer Architecture, Minnesota US, pp. 135-148.

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