Tagging target branch predictors with context with index modification and late stop fetch on tag mismatch

Abstract

A processor-implemented method is provided. The processor-implemented includes reading, by a processor, an instruction stream by fetching instructions from an instruction cache of the processor. The processor then executes a branch prediction operation based on a context of the instruction stream and an index when one of the instructions includes a branch instruction. The branch prediction operation output a prediction and a context. The processor then compares the context of the instruction stream and the context from the branch prediction operation to determine whether to execute a stop fetch.