公开(公告)号：GB2581945A

公开(公告)日：2020-09-02

申请号：GB202009499

申请日：2018-11-09

Applicant: IBM

Inventor： JOEL SILBERMAN ,  BALARAM SINHAROY

IPC: G06F9/38

Abstract: Aspects of the invention include tracking dependencies between instructions in an issue queue. The tracking includes, for each instruction in the issue queue, identifying whether the instruction is dependent on each of a threshold number of instructions added to the issue queue prior to the instruction. The tracking also includes identifying whether the instruction is dependent on one or more other instructions added to the issue queue prior to the instruction that are not included in the each of the threshold number of instructions. A dependency between the instruction and each of the other instructions is tracked. Instructions are issued from the issue queue based at least in part on the tracking.

公开(公告)号：GB2581460B

公开(公告)日：2021-01-06

申请号：GB202009111

申请日：2018-11-09

Applicant: IBM

Inventor： JOEL SILBERMAN ,  BALARAM SINHAROY

IPC: G06F9/38

Abstract: Aspects of the invention include detecting that all instructions in a first group of in-flight instructions have a status of finished. The first group of in-flight instructions is associated with a first allocated entry in a global completion table (GCT) which tracks a dispatch order and status of groups of in-flight instructions. The GCT includes a plurality of allocated entries including the first allocated entry and a second allocated entry. A second group of in-flight instructions dispatched immediately prior to the first group is associated with the second allocated entry in the GCT. Based at least in part on the detecting, the first allocated entry is merged into the second allocated entry to create a single merged second allocated entry in the GCT that includes completion information for both the first group of in-flight instructions and the second group of in-flight instructions. The first allocated entry is then deallocated.

公开(公告)号：GB2581460A

公开(公告)日：2020-08-19

申请号：GB202009111

申请日：2018-11-09

Applicant: IBM

Inventor： JOEL SILBERMAN ,  BALARAM SINHAROY

IPC: G06F9/38

Abstract: Aspects of the invention include detecting that all instructions in a first group of in-flight instructions have a status of finished. The first group of in-flight instructions is associated with a first allocated entry in a global completion table (GCT) which tracks a dispatch order and status of groups of in-flight instructions. The GCT includes a plurality of allocated entries including the first allocated entry and a second allocated entry. A second group of in-flight instructions dispatched immediately prior to the first group is associated with the second allocated entry in the GCT. Based at least in part on the detecting, the first allocated entry is merged into the second allocated entry to create a single merged second allocated entry in the GCT that includes completion information for both the first group of in flight instructions and the second group of in-flight instructions. The first allocated entry is then deallocated.

公开(公告)号：GB2581945B

公开(公告)日：2021-01-20

申请号：GB202009499

申请日：2018-11-09

Applicant: IBM

Inventor： JOEL SILBERMAN ,  BALARAM SINHAROY

IPC: G06F9/38

Abstract: Aspects of the invention include tracking dependencies between instructions in an issue queue. The tracking includes, for each instruction in the issue queue, identifying whether the instruction is dependent on each of a threshold number of instructions added to the issue queue prior to the instruction. The tracking also includes identifying whether the instruction is dependent on one or more other instructions added to the issue queue prior to the instruction that are not included in the each of the threshold number of instructions. A dependency between the instruction and each of the other instructions is tracked. Instructions are issued from the issue queue based at least in part on the tracking.

公开(公告)号：GB2581759B

公开(公告)日：2021-01-20

申请号：GB202009231

申请日：2018-11-09

Applicant: IBM

Inventor： JOEL SILBERMAN ,  BALARAM SINHAROY

IPC: G06F9/38

Abstract: Aspects of the invention include detecting, in 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 of in-flight instructions is the oldest group in an entry of a global completion table (GCT). It is determined 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. The first group of in-flight instructions and the second group of in-flight instructions are completed in a single processor cycle. The completing is 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 includes requesting release of resources utilized by both the first and second groups of in-flight instructions.

公开(公告)号：GB2581759A

公开(公告)日：2020-08-26

申请号：GB202009231

申请日：2018-11-09

Applicant: IBM

Inventor： JOEL SILBERMAN ,  BALARAM SINHAROY

IPC: G06F9/38

Abstract: Aspects of the invention include detecting, in 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 of in-flight instructions is the oldest group in an entry of a global completion table (GOT). It is determined that the entry in the GOT 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. The first group of in-flight instructions and the second group of in-flight instructions are completed in a single processor cycle. The completing is 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 includes requesting release of resources utilized by both the first and second groups of in-flight instructions.