摘要:
An apparatus and method are described for detecting and correcting data fetch errors within a processor core. For example, one embodiment of an instruction processing apparatus for detecting and recovering from data fetch errors comprises: at least one processor core having a plurality of instruction processing stages including a data fetch stage and a retirement stage; and error processing logic in communication with the processing stages to perform the operations of: detecting an error associated with data in response to a data fetch operation performed by the data fetch stage; and responsively performing one or more operations to ensure that the error does not corrupt an architectural state of the processor core within the retirement stage.
摘要:
In one embodiment, logic is provided to receive and execute a mask move instruction to transfer a vector data element including a plurality of packed data elements from a source location to a destination location, subject to mask information for the instruction, such that only portions of the plurality of packed data elements are transferred to the destination location. Other embodiments are described and claimed.
摘要:
A processor includes a core, a memory subsystem, a predictor module, and a memory rename module. The predictor module may include a first logic to identify a dependency between a store instruction and a load instruction, and a second logic to assign a memory renaming (MRN) register to the store instruction and the load instruction based on the identified dependency. Further, the memory rename module may include a third logic to copy, based on the assigned MRN register, information in a first logical register associated with the store instruction directly to a second logical register associated with the load instruction.
摘要:
In an embodiment, the present invention includes an execution unit to execute instructions of a first type, a local power gate circuit coupled to the execution unit to power gate the execution unit while a second execution unit is to execute instructions of a second type, and a controller coupled to the local power gate circuit to cause it to power gate the execution unit when an instruction stream does not include the first type of instructions. Other embodiments are described and claimed.
摘要:
A method and apparatus for including in a processor instructions for performing logical-comparison and branch support operations on packed or unpacked data. In one embodiment, instruction decode logic decodes instructions for an execution unit to operate on packed data elements including logical comparisons. A register file including 128-bit packed data registers stores packed single-precision floating point (SPFP) and packed integer data elements. The logical comparisons may include comparison of SPFP data elements and comparison of integer data elements and setting at least one bit to indicate the results. Based on these comparisons, branch support actions are taken. Such branch support actions may include setting the at least one bit, which in turn may be utilized by a branching unit in response to a branch instruction. Alternatively, the branch support actions may include branching to an indicated target code location.
摘要:
A method and apparatus for including in a processor instructions for performing logical-comparison and branch support operations on packed or unpacked data. In one embodiment, instruction decode logic decodes instructions for an execution unit to operate on packed data elements including logical comparisons. A register file including 128-bit packed data registers stores packed single-precision floating point (SPFP) and packed integer data elements. The logical comparisons may include comparison of SPFP data elements and comparison of integer data elements and setting at least one bit to indicate the results. Based on these comparisons, branch support actions are taken. Such branch support actions may include setting the at least one bit, which in turn may be utilized by a branching unit in response to a branch instruction. Alternatively, the branch support actions may include branching to an indicated target code location.
摘要:
Methods and apparatus relating to a hardware move elimination and/or next page prefetching are described. In some embodiments, a logic may provide hardware move eliminations based on stored data. In an embodiment, a next page prefetcher is disclosed. Other embodiments are also described and claimed.
摘要:
A device and method may fetch an instruction or micro-operation for execution. An indication may be made as to whether the instruction is dependent upon any source values corresponding to a set of previously fetched instructions. A value may be stored corresponding to each source value from which the first instruction depends. An indication may be made for each of the set of sources of the instruction, whether the source depends on a previously loaded value or source, where indicating may include storing a value corresponding to the indication. The instruction may be executed after the stored values associated with the instruction indicate the dependencies are satisfied.
摘要:
A partial execution unit of a splittable execution unit performs an operation on a portion of one or more arguments of a micro-operation to generate a first partial execution result of the micro-operation. A complementary portion of one of the arguments is passed through a bypass execution unit instead of through the splittable execution unit to generate a second partial execution result of the micro-operation. The first partial execution result and second partial execution result are concatenated into a full execution result.
摘要:
Embodiments of the present invention provide an apparatus, system, and method of routing a source operand. Some demonstrative embodiments my include replacing a source operand of a micro operation to be executed by an execution unit with a value type representing a source value, e.g., if the source operand corresponds to the source value. Other embodiments are described and claimed.