Method of speculatively executing store instructions prior to pe

Details Method of speculatively executing store instructions prior to pe Method of speculatively executing store instructions prior to pe

1995-09-29

1998-06-09

Swann, Tod R.

Electrical computers and digital processing systems: memory

Address formation

Address mapping

711146, 711213, 711145, 711144, 395584, 395586, G06F 938

Patent

active

057652082

ABSTRACT:
A data processor (10) has a load/store unit (28) that executes store-to-shared-data instructions before it exclusively owns the data designated by the instruction. Later, a bus interface unit (12) performs a snoop transaction to obtain exclusive ownership of the data. If data processor successfully obtains such ownership, then the data processor correctly and quickly executed the instruction with no further action required. If the data processor can not obtain ownership of the data, then data processor re-executes the instruction in the same time as if it had not acted speculatively.

REFERENCES:
patent: 5237694 (1993-08-01), Horne
patent: 5394555 (1995-02-01), Hunter et al.
patent: 5404489 (1995-04-01), Woods et al.
patent: 5437031 (1995-07-01), Kitami
patent: 5522057 (1996-05-01), Lichy
patent: 5551005 (1996-08-01), Sarangdhar et al.
patent: 5553255 (1996-09-01), Jain et al.
patent: 5598550 (1997-01-01), Shen et al.
patent: 5710906 (1998-01-01), Ghosh et al.
patent: 5713004 (1998-01-01), Kimmel et al.

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