Electrical computers and digital processing systems: processing – Instruction decoding
Reexamination Certificate
2006-06-06
2006-06-06
Kim, Kenneth S. (Department: 2111)
Electrical computers and digital processing systems: processing
Instruction decoding
C713S320000
Reexamination Certificate
active
07058792
ABSTRACT:
An information processing device for sequentially reading and executing programs stored in memory means, including: a program counter for outputting an address for reading a program to the memory means; an instruction decoder for decoding instructions read from the memory means in response to a control signal indicating a period in which the types of codes used in at least a field among fields constituting an instruction in the program are limited to a predetermined number or less; and controlled means for performing processing corresponding to the decoded results output from the instruction decoder. The instruction decoder has a reconfigurable circuit for changing the circuit configuration in response to the control signal so that the decoding is performed based on a relationship between codes in a field in which the types of codes used are limited and decoded results, the relationship being set so that the number of times of change of bit values in the field is reduced.
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“Full 24-bit Digital Signal Processor”, MN 1920 Series LSI Manual, Matsushita Electronics Corporation 3 pages.
Okamoto Minoru
Ueda Katsuhiko
Kim Kenneth S.
McDermott Will & Emery LLP
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