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Binary translation acts as a main method used to solve software compatibility among different instruction set architectures (ISAs), yet the main objects that the binary translator deals with are serial programs but not parallel programs. We propose a hybrid method combining local library replacement and instruction translation based on a formal model built to describe the equivalent when migrating MPI programs between different clusters. The shared codes in a MPI program (MPI library function call) are treated by executing local libraries, and the other parts are done by dynamic binary translation. Also, during the course of dealing with local library functions, we propose a method of program flow redirection by designing two algorithms along with hierarchically encapsulating local libraries. A framework called MPI-QEMU is designed to implement migrating MPI program of 64 bits from X86-64/Linux platform to the domestic SW platform which is verified by experiment.

A Migration Method of MPI Program Combining Local Library Replacement and Instruction Translation