Just in time compiler technique

A method for converting a byte code sequence into an intermediate code sequence, comprising the steps of:

• reading a byte code sequence;
• determining whether the read byte code sequence is identical to one of a plurality of predetermined rule sequences, each of the said predetermined rule sequences comprising a byte code sequence which may be contained in the read byte code sequence;
• and
• if the read byte code sequence is identical to one of the rule sequences, converting a first code portion of said read byte code sequence to intermediate code which corresponds to the one of the rule sequences.

Computer readable code stored on media and comprising a plurality of execution routines executable by a processor that can execute two or more instructions in one cycle, each of said plurality of execution routines including:

• instructions originally required for an execution routine;
• part of instructions for jumping to a second execution routine that is executed following the execution routine;
• and
• part of instructions for jumping to a third execution routine that is executed following the second execution routine,
• wherein each of said execution routines corresponds to each code in a code sequence that regulates the processing flow;
• wherein said part of instructions for jumping to said second execution routine includes an operand generation instruction for said second execution routine and a jump instruction for jumping to said second execution routine;
• and wherein said part of instructions for jumping to said third execution routine includes an instruction for fetching a code corresponding to said third execution routine, and an instruction for calculating an address of said third execution routine.

In a computing environment, a system for generating from a first kind of data sequence, a second kind of data sequence, comprising:

• a module for reading a first kind of data sequence;
• a module for determining whether the read first kind of data sequence is identical to one of predetermined idiom rules, each said predetermined idiom rules comprising a set of the first kind of data;
• and
• a conversion module for converting the first data in said first kind of read data sequence to a second kind of data corresponding to said one of the idiom rules, if said first kind of read data sequence is identical to said one of the idiom rules,
• wherein said conversion module includes a module for calculating an address of an execution routine that corresponds to said first kind of data.

A system for converting a byte code sequence into an intermediate code sequence, comprising:

• a processor;
• a memory;
• a program to be executed by a processor, said program including:
• a module for reading a byte code sequence;
• a module for determining whether the read byte code sequence is identical to one of a plurality of rule code sequences each of the plurality of rule code sequences comprising a set of byte codes;
• and
• a conversion module for converting a first code portion of said read byte code sequence to an intermediate code corresponding to the identical rule code sequence, if said determining module determines the read byte code sequence is identical to one of the rule code sequences.

A computer program stored on storage medium for causing a computer to generate from a first kind of data sequence, a second kind of data sequence, said program comprising the steps of:

• reading a first kind of data;
• determining whether the first kind of read data sequence is identical to one of a plurality of predetermined rule data, each said predetermined rule data comprising a set of said first kind of data;
• converting the first data in said first kind of read data sequence to a second kind of data corresponding to said predetermined rule data, if said first kind of read data sequence is identical to said one of the predetermined rule data;
• and
• calculating an address of an execution routine that corresponds to said first kind of data.

A computer program for causing a computer to convert a byte code sequence into an intermediate code sequence, said program comprising the steps of:

• reading a byte code sequence;
• determining whether the read byte code sequence is identical to one of a plurality of predetermined idiom code sequences, each said predetermined idiom code sequence comprising a set of said byte codes;
• and
• converting the first byte code of said read byte code sequence to an intermediate code associated with an identical one of the idiom code sequences, if said read byte code sequence is identical to one of the idiom code sequences.