Completing coalesced global completion table entries in an out-of-order processor

A system comprising:

• a memory having computer readable instructions;
• and
• one or more processors for executing the computer readable instructions, the computer readable instructions controlling the one or more processors to perform operations comprising:
• detecting, in an instruction sequencing unit (ISU) of an out-of-order (OoO) processor, that all instructions in a first group of in-flight instructions have a status of finished, the first group associated with an entry in a global completion table (GCT) that tracks a dispatch order and a status of groups of in-flight instructions, wherein the dispatch order indicates that the first group of in-flight instructions is the oldest group associated with the GCT;
• determining that the entry in the GCT is a merged entry that is associated with both the first group of in-flight instructions and a second group of in-flight instructions dispatched immediately subsequent to the first group of in-flight instructions;
• completing, in a single processor cycle, the first group of in-flight instructions and the second group of in-flight instructions, the completing based at least in part on detecting that all instructions in the first group of in-flight instructions have a status of finished, the completing comprising requesting release of resources utilized by both the first and second groups of in-flight instructions.