Invention Grant
- Patent Title: Dynamic selection of OSC hazard avoidance mechanism
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Application No.: US16359380Application Date: 2019-03-20
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Publication No.: US11243774B2Publication Date: 2022-02-08
- Inventor: James Raymond Cuffney , Adam Collura , James Bonanno , Edward Malley , Anthony Saporito , Jang-Soo Lee , Michael Cadigan, Jr. , Jonathan Hsieh
- Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
- Applicant Address: US NY Armonk
- Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
- Current Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
- Current Assignee Address: US NY Armonk
- Agency: Cantor Colburn LLP
- Agent Margaret McNamara
- Main IPC: G06F9/30
- IPC: G06F9/30 ; G06F9/38

Abstract:
Methods, systems and computer program products for dynamically selecting an OSC hazard avoidance mechanism are provided. Aspects include receiving a load instruction that is associated with an operand store compare (OSC) prediction. The OSC prediction is stored in an entry of an OSC history table (OHT) and includes a multiple dependencies indicator (MDI). Responsive to determining the MDI is in a first state, aspects include applying a first OSC hazard avoidance mechanism in relation to the load instruction. Responsive to determining that the load instruction is dependent on more than one store instruction, aspects include placing the MDI in a second state. The MDI being in the second state provides an indication to apply a second OSC hazard avoidance mechanism in relation to the load instruction.
Public/Granted literature
- US20200301711A1 DYNAMIC SELECTION OF OSC HAZARD AVOIDANCE MECHANISM Public/Granted day:2020-09-24
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