International Business Machines Corporation
Instruction selection mechanism with class-dependent age-array

Abstract:

Methods and systems for implementing an instruction selection mechanism with class-dependent age-array are described. In an example, a system can include a processor that may sequence instructions. The system can further include a memory operatively coupled to the processor. The system can further include an array allocated on the memory. The array can be operable to store instruction age designations associated with a plurality of instructions sequenced by the processor. The array can be further operable to store the instruction age designations based on instruction classes. The processor can be operable to fetch an instruction from the memory. The processor can be operable to dispatch the instruction to a queue. The processor can be operable to store the instruction age designations associated with the instruction, in the array, based on an instruction class of the instruction.