Data processing system having an apparatus for out-of-order regi

Details Data processing system having an apparatus for out-of-order regi Data processing system having an apparatus for out-of-order regi

1998-02-17

2000-05-09

Donaghue, Larry D.

Electrical computers and digital processing systems: processing

Processing control

Branching

712 23, 712218, G06F 1500

Patent

active

060617853

ABSTRACT:
An apparatus for condition register (CR) renaming and methods of using the same are implemented. In a central processing unit (CPU) having a pipelined architecture, logical operations on CR operands may be executed out-of-order using the CR renaming mechanism. Any instruction that updates the CR data has an associated instruction identifier (IID) stored in a register. Subsequent condition register logical (LCR) instructions that use data in the CR use the stored IID to determine when the CR data has been updated by the execution of the instruction corresponding to the stored IID. When an instruction causing a CR data value update finishes executing, the updated data is obtained by snooping the finish bus of the corresponding execution unit. In this way, these instructions can obtain CR data prior to completion of the preceding instructions. Because the updated CR data is available to the LCR next to execute before the updating instruction completes, deserialized execution of LCR instructions is thereby realized.

REFERENCES:
patent: 5560032 (1996-09-01), Nguyen et al.
patent: 5805876 (1998-09-01), Bose et al.
patent: 5826070 (1998-10-01), Olson et al.
patent: 5828895 (1998-10-01), Chan et al.
patent: 5838988 (1998-11-01), Panwar et al.
patent: 5850542 (1998-12-01), Schroter et al.
patent: 5898853 (1999-04-01), Panwar et al.

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