International Business Machines Corporation
Dynamic fusion based on operand size

Abstract:

Aspects of the invention include receiving, by a processor, a plurality of instructions at an instruction pipeline. The processor can further determine an operand bit field size for each of the received plurality of instructions. The processor can further compare the operand bit field size of at least a subset of the received instructions to a predetermined threshold. The processor can further fuse at least two of the received instructions that have an operand bit field size that meets the predetermined threshold. The processor can further perform an execution stage within the instruction pipeline to execute the received instructions, including the fused instructions.