Research and implementation of C compiler for 32-bit MIPS processor based on LCC

摘要

Based on LCC compiler and 32-bit MIPS processor, this paper implements the successful LCC transplantation on the target machine MIPS processor. In order to quickly and effectively generate code generator, according to the new target machine feature, we modify the original macro assembly instructions through splitting instructions and transforming between instructions, and then rewrite the machine description file. So the generated object code has smaller instruction sets, more compact structure, and its opcode reduces about 50%. Through the above technology, this paper implements translating from C code to assembly code and successfully passes the validation of MIPS simulator PCSPIM, while the performance has been greatly improved. Finally, we generate machine code using the assembler, and successfully verify the machine code on the built-in simulator (ISim) of Xilinx ISE tool.