Method and apparatus for instruction and data serialization in a

Details Method and apparatus for instruction and data serialization in a Method and apparatus for instruction and data serialization in a

1996-12-19

1999-12-21

Vu, Viet D.

Electrical computers and digital processing systems: processing

Instruction issuing

712216, G06F 938

Patent

active

060063254

ABSTRACT:
A new instruction that ensures that the effects of a control register write will be observed at a well defined time is introduced. Specifically, the present invention introduces the concept of a serialization fence instruction. The serialization fence instruction ensures that after a control register in a computer has been modified, all subsequent instructions will observe the effects of the control register modification. Two different serialization fence instructions are illustrated: a data memory reference serialization fence instruction (SRLZ.d) and an instruction fetch serialization fence instruction (SRLZ.i). The data memory reference serialization fence instruction ensures that subsequent instruction executions and data memory references will observe the effects of the control register write. The instruction fetch serialization fence instruction ensures that the entire machine pipeline, starting at the initial instruction fetch stage, will observe the effects of the control register write.

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