Arm Limited

Scott Ryan Tancock

Xiaoyang Shen

Zichao Xie

Shun Wan

Cédric Denis Robert Airaud

There is provided an apparatus, a system, a chip containing product, a method, and a medium. The apparatus comprises: a plurality of registers comprising at least one array register having a plurality of array regions. The apparatus comprises processing circuitry to receive issued instructions and to process those instructions. The apparatus is also provided with control circuitry responsive to receipt of an instruction requiring access to two or more array regions: to decompose the instruction into two or more execution parts, each corresponding to one of the two or more array regions; and for each execution part, to delay issuing the execution part until it is predicted that the execution part can be processed hazard free. The control circuitry is capable of issuing the two or more execution parts in different cycles based on when it is predicted that each execution part can be processed hazard free.

Execution of instructions requiring access to an array register

Issue group allocation circuitry controls allocation of each micro-operation to one of a plurality of issue groups, depending on detection of register conflicts between micro-operations, the register conflicts concerning access to registers of a first register set. A given micro-operation is allocated to a selected issue group for which no micro-operation already allocated to the selected issue group has a register conflict with the given micro-operation and the selected issue group is a younger issue group than any issue group already allocated an older micro-operation than the given micro-operation for which a register conflict is detected between the given micro-operation and the older micro-operation. Issue circuitry controls issue of the micro-operations based on the issue groups, to prevent any instruction in a given issue group being issued until all micro-operations in any older issue group than the given issue group have been issued.

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Haverhill, United Kingdom

Scott Ryan Tancock