Method for instructing a data processor to process data

A method for instructing a data processor to process data comprising:

• a step for providing the data processor with an instruction having a first instruction structure including a predetermined number of instruction fields and including a register-addressing field of a predetermined size;
• and
• a step for providing the data processor with an instruction having a second instruction structure including instruction fields, the number of which is larger than that of the instruction fields of the first instruction structure,
• wherein the second instruction structure includes a register addressing field of a size larger than the size of the resister-addressing field of the first instruction structure,
• each of the instructions having the first and second instruction structures, which are structures different from each other, is directly decoded by the data processor, respectively, and
• when an instruction is provided, the data processor is activated to directly decode the instruction.

A method for instructing a data processor to process data comprising:

• a step for providing the data processor with an instruction having a first instruction structure including a predetermined number of instruction fields and including a register-addressing field of a predetermined size;
• and
• a step for providing the data processor with an instruction having a second instruction structure including instruction fields, the number of which is larger than that of the instruction fields of the first instruction structure,
• wherein the second instruction structure includes a register addressing field of a size larger than the size of the resister-addressing field of the first instruction structure,
• each of the instructions having the first and second instruction structures, which are structures different from each other, is directly decoded by the data processor, respectively,
• the data processor includes a first register file and a second register file,
• the number of registers included in the second register file is larger than the number of registers included in the first register file, and
• the register-addressing field in the first and second instruction structures designates one of the registers in the first and second register files, respectively.

A method for instructing a data processor to process data comprising:

• a step for providing the data processor with an instruction having a first instruction structure including a predetermined number of instruction fields and including a register-addressing field of a predetermined size;
• and
• a step for providing the data processor with an instruction having a second instruction structure including instruction fields, the number of which is larger than that of the instruction fields of the first instruction structure,
• wherein the second instruction structure includes a register addressing field of a size larger than the size of the resister-addressing field of the first instruction structure,
• each of the instructions having the first and second instruction structures, which are structures different from each other, is directly decoded by the data processor, respectively,
• the data processor includes an instruction register to hold an instruction provided, and
• each of the instructions having the first and second instruction structures is decoded directly from the instruction register.