公开(公告)号：DE69831282D1

公开(公告)日：2005-09-29

申请号：DE69831282

申请日：1998-02-05

Applicant: IBM

Inventor： GAERTNER UTE ,  GETZLAFF DIPL-ING ,  KOEHLER DIPL-ING ,  PFEFFER DIPL-ING

IPC: G06F9/30 ,  G06F9/38

Abstract: The invention relates to the area of register renaming and allocation in superscalar computer systems. When a multitude of instructions in the instruction stream reads from or writes to a certain logical register, said logical register will have to be represented by a multitude of physical registers. Therefore, there have to exist several physical rename registers per logical register. The oldest one of said rename registers defines the architected state of the computer system, the in-order state. The invention provides a method for administration of the various register instances. Both the registers representing the in-order state and the various rename instances are kept in one common circular buffer. There exist two pointers per logical register: The first one, the in-order pointer, points to the register that represents the in-order state, the second one, the rename pointer, points to the most recent rename instance.