Electrical computers and digital processing systems: processing – Processing control – Branching
Reexamination Certificate
2008-04-29
2008-04-29
Kindred, Alford (Department: 2181)
Electrical computers and digital processing systems: processing
Processing control
Branching
C711S125000
Reexamination Certificate
active
10858791
ABSTRACT:
A method for optimizing loop control of microcoded instructions includes identifying an instruction as a repetitive microcode instruction such as a move string instruction, for example, having a repeat prefix. The repetitive microcode instruction may include a loop of microcode instructions forming a microcode sequence. The microcode sequence is stored within a storage of a microcode unit. The method also includes storing a loop count value associated with the repetitive microcode instruction to a sequence control unit of the microcode unit. The method further includes determining a number of iterations to issue the microcode sequence for execution by an instruction pipeline based upon the loop count value. In response to receiving the repetitive microcode instruction, the method includes continuously issuing the microcode sequence for the number of iterations.
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Muthusamy Karthikeyan
Radhakrishnan Arun
Advanced Micro Devices , Inc.
Curran Stephen J.
Geib Benjamin P.
Kindred Alford
Meyertons Hood Kivlin Kowert & Goetzel P.C.
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