An approach to adapting x86 built-in functions for RISC-V development
The construction of the ecosystem for the emerging RISC-V architecture requires the adaptation and migration of functions or software packages from other architectures to RISC-V.In the study of migrating GCC-specific built-in functions to the RISC-V architecture,a method for converting x86 built-in functions to RISC-V was proposed.For non-extension instruction set built-in functions(which belong to non-vector types),functions with the same functionality in the RISC-V architecture or standard library functions were used as replacements.Concerning SSE extension instruction set built-in functions,the migration involves establishing data type mappings and vector function operation mappings to achieve the transition to RISC-V architecture's vector extension functions or standard library functions.Notably,the migration via RVV functions constitutes 67％of the overall approach.Experimental results demonstrate the correctness of program functionality and the efficacy of the proposed method.Additionally,this method provides guidance for the migration of built-in functions from other extension instruction sets,offering broader coverage and enhanced scalability compared to existing approaches.
function migrationbuilt-in functioninstruction set extensionRISC-V migra-tion
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