公开(公告)号：US20200065109A1

公开(公告)日：2020-02-27

申请号：US16524667

申请日：2019-07-29

Applicant: Arm Limited

Inventor： Xiaoyang SHEN ,  Damien Robin MARTIN ,  Cédric Denis Robert AIRAUD ,  Luca NASSI ,  François DONATI

IPC: G06F9/38 ,  G06F9/30 ,  G06F9/355 ,  G06F9/22

Abstract: An apparatus has a processing pipeline, and first and second register files. A temporary-register-using instruction is supported which controls the pipeline to perform an operation using a temporary variable derived from an operand stored in the first register file. In response to the instruction, when a predetermined condition is not satisfied, the pipeline processes at least one register move micro-operation to transfer data from the at least one source register of the first register file to at least one newly allocated temporary register of the second register file. When the condition is satisfied, the operation can be performed using a temporary variable already stored in the temporary register of the second register file used by an earlier temporary-register-using instruction specifying the same source register for determining the temporary variable, in the absence of an intervening instruction for rewriting the source register.