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AssigneesKen Sakamura, Hitachi, Ltd., Hitachi Microcomputer Engineering Ltd.
InventorsKen Sakamura, Takuichiro Nakazawa, Atsushi Hasegawa, Ikuya Kawasaki, Kazuhiko Iwasaki
Estimating the term…
In addition to an ordinary bit field instruction without limitation which makes use of an offset value and a field width, a bit field instruction with limitation which does not calculate the spread of the bit field is separately installed. In the present invention the calculation for determination of the spread of the bit field is not performed when the bit field instruction with limitation is executed. In addition, when executing a bit field instruction with limitation, the offset value and the field width can be obtained directly as immediate values thereby decreasing the execution time of the instruction.
A data processing system comprising:
A method for processing a field within a memory of a microprocessor having execution means for executing instructions and calculating a bit width of each field to be processed by said instructions, each instruction including operation codes for indicating whether said each instruction is an instruction for causing said execution means to perform a bit processing operation on a field which contains two or more words or an instruction for causing said execution means to perform a bit processing operation on a field which is contained within one word, said method comprising the steps of:
A microprocessor comprising:
Dependencies are inferred from the claim text.