Apparatus and method for re-execution of faulting operations

A method comprising:

• scheduling and dispatching operations to an execution unit at least some of the operations comprising load operations to load data from a system memory and store operations to store data to the system memory;
• determining whether a current load/store operation has faulted and, if not, then continuing execution of the load/store operation;
• determining whether the current load/store operation is at retirement if the current load/store operation has faulted;
• if the current load/store operation which has faulted is not at retirement, then scheduling the uop to be re-dispatched only when it is the next uop to retire;
• causing logging circuitry and/or fault registers to be active when a load/store operation has been dispatched at retirement and causing the logging circuitry and/or fault registers to be inactive if the load/store operation has not been dispatched at retirement.

A system comprising:

• a memory to store instructions and data;
• a processor to execute the instructions and process the data;
• a graphics processor to perform graphics operations in response to graphics instructions;
• a network interface to receive and transmit data over a network;
• an interface for receiving user input from a mouse or cursor control device, the plurality of cores executing the instructions and processing the data responsive to the user input;
• the processor comprising:
• an out-of-order engine to schedule and dispatch operations to an execution unit at least some of the operations comprising load operations to load data from a system memory and store operations to store data to the system memory;
• a first circuit to determine whether a current load/store operation is at retirement;
• a second circuit to cause logging circuitry and/or fault registers to be active when a load/store operation has been dispatched at retirement, wherein upon detection of a fault condition associated with the load/store operation, data associated with the fault is to be written to the logging circuitry and/or fault registers, the second circuit to cause the logging circuitry and/or fault registers to be inactive if the load/store operation has not been dispatched at retirement.