公开(公告)号：US09996356B2

公开(公告)日：2018-06-12

申请号：US14998299

申请日：2015-12-26

Applicant: Intel Corporation

Inventor： Vineeth Mekkat ,  Oleg Margulis ,  Jason M. Agron ,  Ethan Schuchman ,  Sebastian Winkel ,  Youfeng Wu ,  Gisle Dankel

IPC: G06F9/30 ,  G06F9/38

CPC classification number: G06F9/30185 ,  G06F9/3826 ,  G06F9/3834 ,  G06F9/3838 ,  G06F9/3865

Abstract: Apparatus and method for detecting and recovering from incorrect memory dependence speculation in an out-of-order processor are described herein. For example, one embodiment of a method comprises: executing a first load instruction; detecting when the first load instruction experiences a bad store-to-load forwarding event during execution; tracking the occurrences of bad store-to-load forwarding event experienced by the first load instruction during execution; controlling enablement of an S-bit in the first load instruction based on the tracked occurrences; generating a plurality of load operations responsive to an enabled S-bit in first load instruction, wherein execution of the plurality of load operations produces a result equivalent to that from the execution of the first load instruction.