Abstract: A communication system is described providing for access to registers over a control register access bus. The system includes one or more core units including one or more addressable core registers, wherein the units are coupled to the communication bus. The system also includes one or more core clusters (CCLUSTERs) coupled to the one or more core units through the communication bus. The CCLUSTERs provide one or more gateways for transactions to and from the one or more core units. The system also includes a request ordering and coherency (ROC) unit coupled to the CCLUSTERs through the communication bus that is configured for scheduling transactions relating to the registers onto the communication bus. The system also includes the one or more addressable registers that are located in the ROC unit, the CCLUSTERs, and the one or more core units.

Abstract: A platform and method for secure handling of events in an isolated environment. A processor executing in isolated execution “IsoX” mode may leak data when an event occurs as a result of the event being handled in a traditional manner based on the exception vector. By defining a class of events to be handled in IsoX mode, and switching between a normal memory map and an IsoX memory map dynamically in response to receipt of an event of the class, data security may be maintained in the face of such events.

Abstract: A platform and method for secure handling of events in an isolated environment. A processor executing in isolated execution “IsoX” mode may leak data when an event occurs as a result of the event being handled in a traditional manner based on the exception vector. By defining a class of events to be handled in IsoX mode, and switching between a normal memory map and an IsoX memory map dynamically in response to receipt of an event of the class, data security may be maintained in the face of such events.

Abstract: A platform and method for secure handling of events in an isolated environment. A processor executing in isolated execution “IsoX” mode may leak data when an event occurs as a result of the event being handled in a traditional manner based on the exception vector. By defining a class of events to be handled in IsoX mode, and switching between a normal memory map and an IsoX memory map dynamically in response to receipt of an event of the class, data security may be maintained in the face of such events.

Abstract: A platform and method for secure handling of events in an isolated environment. A processor executing in isolated execution “IsoX” mode may leak data when an event occurs as a result of the event being handled in a traditional manner based on the exception vector. By defining a class of events to be handled in IsoX mode, and switching between a normal memory map and an IsoX memory map dynamically in response to receipt of an event of the class, data security may be maintained in the face of such events.

Abstract: A platform and method for secure handling of events in an isolated environment. A processor executing in isolated execution “IsoX” mode may leak data when an event occurs as a result of the event being handled in a traditional manner based on the exception vector. By defining a class of events to be handled in IsoX mode, and switching between a normal memory map and an IsoX memory map dynamically in response to receipt of an event of the class, data security may be maintained in the face of such events.

Abstract: A platform and method for secure handling of events in an isolated environment. A processor executing in isolated execution “IsoX” mode may leak data when an event occurs as a result of the event being handled in a traditional manner based on the exception vector. By defining a class of events to be handled in IsoX mode, and switching between a normal memory map and an IsoX memory map dynamically in response to receipt of an event of the class, data security may be maintained in the face of such events.

Abstract: A platform and method for secure handling of events in an isolated environment. A processor executing in isolated execution “IsoX” mode may leak data when an event occurs as a result of the event being handled in a traditional manner based on the exception vector. By defining a class of events to be handled in IsoX mode, and switching between a normal memory map and an IsoX memory map dynamically in response to receipt of an event of the class, data security may be maintained in the face of such events.

Abstract: In one embodiment, a method for flow optimization and prediction for vector streaming single instruction, multiple data (SIMD) extension (VSSE) memory operations is disclosed. The method comprises generating an optimized micro-operation (?op) flow for an instruction to operate on a vector if the instruction is predicted to be unmasked and unit-stride, the instruction to access elements in memory, and accessing via the optimized ?op flow two or more of the elements at the same time without determining masks of the two or more elements. Other embodiments are also described.

Abstract: Methods and apparatus, including computer program products, for a microinstruction pointer stack in a processor. A method executed in a processor includes executing microcode (?code) addressed by pointers stored in an out-of-order microinstruction pointer (?IP) stack, and manipulating the ?IP stack with a set of microinstructions.

Abstract: A microprocessor uses broadcast state renaming to reduce processing delays and microcode overhead which would otherwise result from rebroadcasts of state due to register renaming. The microprocessor comprises a memory execution unit, a microcode sequencer, and various functional units. The memory execution unit includes a segment register, content of which represents state of the processor. The microcode sequencer sets an identifier field in at least some microinstructions, indicating which of multiple copies of broadcast state are to be used in processing each such microinstruction. Each functional unit receives and internally stores multiple copies of broadcast state, each of which may correspond to a different renamed version of the segment register. Each functional unit selects, based on the identifier field of a microinstruction, one of its internally stored copies of broadcast state for use in processing the microinstruction.

Abstract: A method executed in a processor includes executing microcode (&mgr;code) stored in an out-of-order microinstruction pointer (&mgr;IP) stack and manipulating the &mgr;IP stack with a set of microinstructions.

Abstract: A microprocessor uses broadcast state renaming to reduce processing delays and microcode overhead which would otherwise result from rebroadcasts of state due to register renaming. The microprocessor comprises a memory execution unit, a microcode sequencer, and various functional units. The memory execution unit includes a segment register, content of which represents state of the processor. The microcode sequencer sets an identifier field in at least some microinstructions, indicating which of multiple copies of broadcast state are to be used in processing each such microinstruction. Each functional unit receives and internally stores multiple copies of broadcast state, each of which may correspond to a different renamed version of the segment register. Each functional unit selects, based on the identifier field of a microinstruction, one of its internally stored copies of broadcast state for use in processing the microinstruction.