US 2020/0026521 A1 · INSTRUCTION COMPLETION TABLE CONTAINING ENTRIES THAT SHARE INSTRUCTION TAGS

Abstract

Systems, methods, and computer-readable media are described for performing instruction execution using an instruction completion table (ICT) that is configured to accommodate shared ICT entries. A shared ICT entry maps to multiple instructions such as, for example, two instructions. Each shared ICT entry may be referenced by an even instruction tag (ITAG) and an odd ITAG that correspond to respective instructions that have been grouped together in the shared ICT entry. The instructions corresponding to a given shared ICT entry can be executed and finished independently of one another. A shared ICT entry is completed when each execution of each instruction corresponding to the shared ICT entry has finished and when all prior ICT entries have completed. Also described herein are system, methods, and computer-readable media for flushing instructions in shared ICT entries in response to execution of a branch instruction.

Claims20

Dependent claims

A computer-implemented method for instruction execution utilizing an instruction completion table (ICT) containing entries that share instruction tags, the method comprising:

fetching a first instruction;
fetching a second instruction;
and
dispatching the first instruction and the second instruction at least in part by generating a single entry in the ICT for the first instruction and the second instruction, the ICT entry representing the first instruction using a corresponding even instruction tag (ITAG) and representing the second instruction using a corresponding odd ITAG.

1 more element

A system for instruction execution utilizing an instruction completion table (ICT) containing entries that share instruction tags, the system comprising:

at least one memory storing computer-executable instructions;
and
at least one processor, wherein the at least one processor is configured to access the at least one memory and execute the computer-executable instructions to:
fetch a first instruction;
fetch a second instruction;
and
dispatch the first instruction and the second instruction at least in part by generating a single entry in the ICT for the first instruction and the second instruction, the ICT entry representing the first instruction using a corresponding even instruction tag (ITAG) and representing the second instruction using a corresponding odd ITAG.

4 more elements

A computer program product for instruction execution utilizing an instruction completion table (ICT) containing entries that share instruction tags, the computer program product comprising a storage medium readable by a processing circuit, the storage medium storing instructions executable by the processing circuit to cause a method to be performed, the method comprising:

fetching a first instruction;
fetching a second instruction;
and
dispatching the first instruction and the second instruction at least in part by generating a single entry in the ICT for the first instruction and the second instruction, the ICT entry representing the first instruction using a corresponding even instruction tag (ITAG) and representing the second instruction using a corresponding odd ITAG.

1 more element

Dependencies are inferred from the claim text.

Instruction completion table containing entries that share instruction tags

Life of this patent

Instruction completion table containing entries that share instruction tags

Life of this patent

Abstract

Claims20