Abstract: In the domestically-produced Sunway high-performance systems,the Sunway GCC compiler finds it is challenging to vectorize complex programs using methods such as automatic vectorization and inline assembly during the compliation process,impeding the performance of domestically-produced Sunway processors.To address the issue of non-vectorizable programs,research and design of SIMD programming interfaces have been conducted within the Sunway compiler.By adding vector machine modes and vector data types in the Sunway GCC compiler based on Sunway vector instructions,the compiler can recognize vector parameter types.Depending on the type and complexity of the vector instruction,different vector instructions are expanded using intrinsic functions,operator expansion,and advanced language expansion,thereby implementing SIMD programming interface functions.Adding different instruction templates to the backend,so that the appropriate instruction templates can be matched,generating assembly code for the corresponding vector instructions.By testing and analyzing the FFTW library and Hyperscan library,it finds that after vectorizing the programs using SIMD programming interfaces,the average acceleration ratios for the FFTW library are 1.97 for the Double class and 2.13 for the Float type,while the average acceleration ratio for Hyperscan is 2.94.

Key words: Vectorization, SIMD programming interface, Vector instruction, Instrinsic function, Instruction template