Multiple instruction issuance with parallel inter-group and intra-group picking

摘要

A scheduler with a picker block capable of dispatching multiple instructions per cycle is disclosed. The picker block may comprise an inter-group picker and an intra-group picker. The inter-group picker may be configured to pick multiple ready groups when there are two or more ready groups among a plurality of groups of instructions, and pick a single ready group when the single ready group is the only ready group among the plurality of groups. The intra-group picker may be configured to pick one ready instruction from each of the multiple ready groups when the inter-group picker picks the multiple ready groups, and to pick multiple ready instructions from the single ready group when the inter-group picker picks the single ready group.