Data processing: software development – installation – and managem – Software program development tool – Translation of code
Reexamination Certificate
2005-03-22
2010-02-02
Deng, Anna (Department: 2191)
Data processing: software development, installation, and managem
Software program development tool
Translation of code
C712S203000, C712S205000, C712S207000
Reexamination Certificate
active
07657883
ABSTRACT:
A dispatch scheduler in a multithreading microprocessor is disclosed. Each of N concurrently executing threads has one of P priorities. P N-bit round-robin vectors are generated, each being a 1-bit left-rotated and subsequently sign-extended version of an N-bit 1-hot input vector indicating the last thread selected for dispatching at the priority. N P-input muxes each receive a corresponding one of the N bits of each of the P round-robin vectors and selects the input specified by the thread priority. Selection logic selects an instruction for dispatching from the thread having a dispatch value greater than or equal to any of the threads left thereof in the N-bit input vectors. The dispatch value of each of the threads comprises a least-significant bit equal to the corresponding P-input mux output, a most-significant bit that is true if the instruction is dispatchable, and middle bits comprising the priority of the thread.
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Deng Anna
MIPS Technologies Inc.
Sterne Kessler Goldstein & Fox PLLC
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