Invention Grant
- Patent Title: Accelerated reversal of speculative state changes and resource recovery
- Patent Title (中): 加速逆转投机状态变化和资源回收
-
Application No.: US13918863Application Date: 2013-06-14
-
Publication No.: US09575763B2Publication Date: 2017-02-21
- Inventor: Jay Fleischman , Michael Estlick
- Applicant: Advanced Micro Devices, Inc.
- Applicant Address: US CA Sunnyvale
- Assignee: Advanced Micro Devices, Inc.
- Current Assignee: Advanced Micro Devices, Inc.
- Current Assignee Address: US CA Sunnyvale
- Main IPC: G06F9/32
- IPC: G06F9/32 ; G06F9/38
Abstract:
A method includes undoing, in reverse program order, changes in a state of a processing device caused by speculative instructions previously dispatched for execution in the processing device and concurrently deallocating resources previously allocated to the speculative instructions in response to interruption of dispatch of instructions due to a flush of the speculative instructions. A processor device comprises a retire queue to store entries for instructions that are awaiting retirement and a finite state machine. The finite state machine is to interrupt dispatch of instructions in response to a flush of speculative instructions previously dispatched for execution in the processing device and to undo, in reverse program order, changes in a state of the processing device caused by the speculative instructions while concurrently deallocating resources previously allocated to the speculative instructions.
Public/Granted literature
- US20140372732A1 ACCELERATED REVERSAL OF SPECULATIVE STATE CHANGES AND RESOURCE RECOVERY Public/Granted day:2014-12-18
Information query
