Invention Grant
- Patent Title: Zero cycle move
- Patent Title (中): 零循环移动
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Application No.: US13447651Application Date: 2012-04-16
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Publication No.: US09575754B2Publication Date: 2017-02-21
- Inventor: James B. Keller , John H. Mylius , Conrado Blasco-Allue , Gerard R. Williams, III , Suparn Vats
- Applicant: James B. Keller , John H. Mylius , Conrado Blasco-Allue , Gerard R. Williams, III , Suparn Vats
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Meyertons, Hood, Kivlin, Kowert & Goetzel, P.C.
- Agent Rory D. Rankin
- Main IPC: G06F15/00
- IPC: G06F15/00 ; G06F9/30 ; G06F9/40 ; G06F9/38

Abstract:
A system and method for reducing the latency of data move operations. A register rename unit within a processor determines whether a decoded move instruction is eligible for a zero cycle move operation. If so, control logic assigns a physical register identifier associated with a source operand of the move instruction to the destination operand of the move instruction. Additionally, the register rename unit marks the given move instruction to prevent it from proceeding in the processor pipeline. Further maintenance of the particular physical register identifier may be done by the register rename unit during commit of the given move instruction.
Public/Granted literature
- US20130275720A1 ZERO CYCLE MOVE Public/Granted day:2013-10-17
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