Instruction classified multi-emitting method based on SPRAC V8 instruction set

The invention provides an instruction classified multi-emitting method based on an SPRAC V8 (Scalable Processor Architecture V8) instruction set. According to the method, SPARC V8 instructions are divided into four classes; an SPRAC V8 processor is divided into five flow stages including an instruction fetching stage, a decoding stage, an execution stage, a memory accessing stage and a writing-back stage; the five flow stages are connected through a common data bus; (n-1) instruction fetching paths are added at the instruction fetching stage; (n-1) decoding units are added at the decoding stage; n groups of reservation stations are added between the decoding stage and the execution stage; reordering buffer regions are added between the execution stage and the memory accessing stage; corresponding execution units are added in the execution stage; a multi-emitting five-stage flow line structure is built for the SPRAC V8 processor; the conflict among parallel instructions is detected through the reservation stations; different instructions are processed through different execution units; finally, the instruction execution results are sequentially submitted by the reordering buffer regions; the parallel execution of the instructions is realized; and the processing performance of the SPRAC V8 processor is improved.