Dynamic optimizing object code translator for architecture emulation and dynamic optimizing object code translation method

A computer architecture emulation system which emulates a source computer architecture on a destination computer architecture, comprising:

• an interpreter individually translating original object code into corresponding translated object code, determining a number of executions of branch instructions in the original object code, and comparing the number of executions of branch instructions with a threshold number;
• a compiler grouping instructions of the original object code into a segment when a number of executions of a corresponding branch instruction exceeds the threshold number, and dynamically compiling the segment;
• and
• a branch logger to store branch profile information of the branch instructions determined by said interpreter, wherein
• said branch profile information includes a branch address, a branch successor, a non-branch successor, a branch execution count, and a branch taken count, and
• said branch profile information is logged by said interpreter during branch instruction emulation.

A computer architecture emulation system which emulates a source computer architecture on a destination computer architecture, comprising:

• an interpreter individually translating original object code into corresponding translated object code, determining a number of executions of branch instructions in the original object code, and comparing the number of executions of branch instructions with a threshold number;
• and
• a compiler grouping instructions of the original object code into a segment when a number of executions of a corresponding branch instruction exceeds the threshold number, and dynamically compiling the segment,
• wherein each branch instruction is a seed, said compiler further comprising:
• a block picker selecting a segment of the original object code to compile based upon the seed and the profile information of the branch,
• a block layout unit flattening the segment into a linear list of instructions, and
• an optimizing code generation unit performing the actual compilation of original instructions into tanslated code segment instructions.

A computer architecture emulation system which emulates a source computer architecture on a destination computer architecture, comprising:

• a plurality of interpreters individually translating original object code into corresponding translated object code, wherein each of said plurality of interpreters profiles original object code branch information in real time while executing translated object code instructions, the profile information comprising a number of executions of branch instructions, and each of said interpreters comparing the number of executions of branch instructions with a threshold number;
• and
• a compiler grouping original object code instructions from any of said plurality of interpreters into segments based upon corresponding branch instructions in the original object code and dynamically compiling the segments of the original object code when the corresponding branch instruction is greater than the threshold number,
• wherein a rate of compilation of segments to be compiled is controlled by raising the threshold number when a queue to store the segments to be translated reaches a predetermined capacity.

A computer architecture emulation system which emulates a source computer architecture on a destination computer architecture, comprising:

• an interpreter individually translating original object code into corresponding translated object code, wherein said interpreter profiles-branch instructions of the original object code by storing a number of executions for each branch instruction and comparing the number of executions with a threshold number, such that branch instructions which exceed the threshold number are designated as seeds;
• and
• a compiler grouping instructions of the original object code into segments based upon the seeds and dynamically compiling the segments of the original object code during translation and profiling by said interpreter,
• wherein a rate of compilation of segments to be compiled is controlled by raising the threshold number when a queue to store the segments to be translated reaches a predetermined capacity.

A multi-tasking computer architecture emulation system which emulates a source computer architecture on a multi-tasking destination computer architecture, comprising:

• an interpreter task individually translating original object code into corresponding translated object code and determining a number of executions of branch instructions in the original object code, and comparing the number of executions of branch instructions with a threshold number;
• and
• a compiler task, operating with said interpreter task on the multi-tasking destination computer architecture, to group instructions of the original object code into a segment when a number of executions of a corresponding branch instruction exceeds the threshold number, and dynamically compiling the segment,
• wherein said multi-tasking computer architecture emulation system is a dynamic translation system, said multi-tasking computer architecture system further comprising software feedback equalizing a rate of compilation requests sent by said interpreter task and the rate of compilations completed by said compiler task, without allowing the compiler task to become idle by varying the threshold number.