Single-Instruction Multiple-Data Execution : Springer International Publishing AG : 9783031006180 : 27 May 2015 : Having hit power limitations to even more aggressive out-of-order execution in processor cores, many architects in the past decade have turned to single-instruction-multiple-data (SIMD) execution to increase single-threaded performance. SIMD execution, or having a single instruction drive execution of an identical operation on multiple data items, was already well established as a technique to efficiently exploit data parallelism. Furthermore, support for it was already included in many commodity processors. However, in the past decade, SIMD execution has seen a dramatic increase in the set of applications using it, which has motivated big improvements in hardware support in mainstream microprocessors.The easiest way to provide a big performance boost to SIMD hardware is to make it wider?i.e., increase the number of data items hardware operates on simultaneously. Indeed, mi