Apparatus to perform source operand dependency analysis perform

Details Apparatus to perform source operand dependency analysis perform Apparatus to perform source operand dependency analysis perform

1995-05-01

1999-03-16

Lee, Thomas C.

G06F 934

Patent

active

058840613

ABSTRACT:
An apparatus performs source operand dependency analysis, perform register renaming and provide rapid pipeline recovery for a microprocessor capable of issuing and executing multiple instructions out-of-order in a single machine cycle. The apparatus first provides an enhanced means for rapid pipeline recovery due to a mispredicted branch or other store/load conflict or unsupported store/load forward circumstances. Second, the apparatus provides an improved instruction scheduling means wherein the oldest instructions that have all of their dependencies resolved are executed first. Third, the apparatus provides a means for enabling any execution or memory access instruction to execute out-of-order. Fourth, the apparatus provides a means for handling precise recovery of interrupts when processing instructions in out-of-order sequence.

REFERENCES:
patent: 4722049 (1988-01-01), Lahti
patent: 4992938 (1991-02-01), Cocke et al.
patent: 5446912 (1995-08-01), Colwell et al.
patent: 5481683 (1996-01-01), Karim
patent: 5499352 (1996-03-01), Clift et al.

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