Electrical computers and digital processing systems: processing – Instruction issuing
Reexamination Certificate
2009-03-24
2011-12-27
Pan, Daniel (Department: 2183)
Electrical computers and digital processing systems: processing
Instruction issuing
C712S219000
Reexamination Certificate
active
08086826
ABSTRACT:
An information handling system includes a processor with an issue unit (IU) that may perform instruction dependency tracking for successive instruction issue operations. The IU maintains non-shifting issue queue (NSIQ) and shifting issue queue (SIQ) instructions along with relative instruction to instruction dependency information. A mapper maps queue position data for instructions that dispatch to issue queue locations within the IU. The IU may test an issuing producer instruction against consumer instructions in the IU for queue position (QPOS) and register tag (RTAG) matches. A matching consumer instruction may issue in a successive manner in the case of a queue position match or in a next processor cycle in the case of a register tag match.
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Brown Mary Douglass
Burky William Elton
Nguyen Dung Quoc
Sinharoy Balaram
Gerhardt Diana R.
International Business Machines - Corporation
Pan Daniel
Tkacs Stephen R.
Walder, Jr. Stephen J.
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