Apparatus, method and system for operation in configurable spatial accelerator

The invention relates to an apparatus, method and system for operation in a configurable space accelerator. A space accelerator (CSA) includes a plurality of processing elements; a circuit switched interconnect network between the plurality of processing elements; and a configuration register within each processing element for storing a configuration value. The configuration value has a first portion which is configured to indicate a first value of a first mode when set to indicate a second mode, cause the processing element to pass the input value to an arithmetic circuit of the processing element without modifying the input value, and cause the processing element to perform a blending operation on the input value to form a blended input value when set to a second value indicating a second mode, and then transmit the blended input value to the arithmetic circuit of the processing element; and a second portion that causes the processing element to perform an operation indicated by thesecond portion of the con