Predicting a Vector Length Associated with a Configuration Instruction

Prediction circuitry may generate a vector length prediction associated with a configuration instruction prior to completion of execution of the configuration instruction. The vector length prediction may indicate a number of data elements on which a vector instruction will operate. In some implementations, the prediction circuitry can generate the vector length prediction by detecting a repeating pattern of vector lengths associated with earlier executions of the configuration instruction. In some implementations, the prediction circuitry can generate the vector length prediction by detecting decrements of an application vector length by a constant value.