公开(公告)号：WO2017112361A3

公开(公告)日：2017-07-27

申请号：PCT/US2016063890

申请日：2016-11-28

Applicant: INTEL CORP

Inventor： MEKKAT VINEETH ,  MARGULIS OLEG ,  AGRON JASON M ,  SCHUCHMAN ETHAN ,  WINKEL SEBASTIAN ,  WU YOUFENG ,  DANKEL GISLE

IPC: G06F9/30 ,  G06F9/38 ,  G06F11/00 ,  G06F11/07

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

Abstract: Embodiments of apparatus and methods 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.

Abstract translation: 这里描述了用于在无序处理器中检测并从不正确的存储器依赖性推测中恢复的设备和方法的实施例。 例如，方法的一个实施例包括：执行第一加载指令; 检测何时第一加载指令在执行期间经历了不良的存储 - 加载转发事件; 跟踪在执行期间由第一加载指令经历的不良存储 - 加载转发事件的发生; 基于所跟踪的事件来控制所述第一加载指令中的S位的启用; 响应于第一加载指令中的启用的S位产生多个加载操作，其中所述多个加载操作的执行产生与来自所述第一加载指令的执行的结果相等的结果。