GCC Toolchain Design Scheme Supporting PSPCore Coprocessor Instruction

Based on the GNU Compiler Collection (GCC) toolchain, this paper analyzes the working principle, compilation process and source code of the compiler, studies the format of the RISC-V extension instructions, and realizes the compilation support of GCC for the Power Special Processor Core (PSPCore) coprocessor instructions in this project. In the design, the assembler of the GCC toolchain is mainly extended, and it is realized by adding the extension instructions code structure of PSPCore to the assembler. When developing an embedded application, we use the mnemonic of the PSPCore extension instructions and call it by inline assembly; when compiling with GCC, the conversion of the assembly instructions to the machine code is completed in the assembly stage, and finally the machine code of the extension instructions are generated.