Program translating apparatus and a processor which achieve high

Details Program translating apparatus and a processor which achieve high Program translating apparatus and a processor which achieve high

1996-01-22

1998-05-26

Treat, William M.

395580, G06F 945

Patent

active

057581622

ABSTRACT:
A program translating apparatus is composed of a translation unit 103 and a link unit 108. The translation unit 103 includes a determination unit 105 which detects the stack size to be needed for each subroutine included in a source program to be translated into a machine instruction sequence and the name of a register to be retrieved in the process of each subroutine. The determination unit 105 then stores the stack size and the name detected into a file together with the machine instruction sequence. The link unit 108 includes the following units: A branch instruction detection unit 109 detects a branch instruction from the machine instruction sequence when machine instruction sequences stored in different files are linked each other. A file detection unit 110 and an acquisition unit 111 retrieve the stack size and the register name from the file which has the branch target subroutine. A subroutine call instruction generation unit 112 replaces the branch instruction with an instruction which consequently executes a branch operation, a stack reservation, and register retrieval.

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Srivastava et al.; "Prophetic Branches: A Branch Architecture for Code Compaction and Efficient Execution"; Microarchitecture, 1993 International Symposium; pp. 94-99, 1993.
"A Survey of Branch Techniques in Pipelined Processors", by A.M. Gonzales, 8205 Microprocessing and Microprogramming 36(1993) Oct., No. 5.
"Inside Intel's i960CA Superscalar Processor", by S. McGeady, 2407 Microprocessoers and Microsystems, 14 (1990) Jul./Aug., No. 6

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