Arithmetic device, arithmetic method, hard disc controller, hard disc device, program converter, and compiler

An arithmetic method, comprising:

• storing a first program and a second program embedded in processing of the first program and called based on an execution of the first program in a memory;
• reading the first program from the memory and executing the first program;
• reading the second program from the memory and storing the read second program in a cache memory, an access speed of the cache memory being faster than an access speed of the memory, before the second program is called from the memory based on the execution of the first program;
• and
• reading the second program from the cache memory and executing the second program, in accordance with a call of the second program based on the execution of the first program.

A program converter, comprising:

• an analyzer configured to analyze a program source comprising a first instruction code stored in a first memory and a second instruction code stored in a second memory with an access speed slower than an access speed of the first memory, and called from the first instruction and executed in order to extract position information of the first instruction and the second instruction;
• a definition table configured to define a reference in order to set a position for inserting a third instruction code copying the second instruction code from the second memory into a third memory storing data temporarily with an access speed faster than the access speed of the second memory regarding the program source;
• a search module configured to search a position for inserting the third instruction code in the program source based on the reference defined by the definition table and the position information of the first and the second instructions;
• and
• a code insertion module configured to insert the third instruction code in the position searched in the search module.