Stream-interleaved pipelined RISC processor design for SIMD and MIMD system development

Architectures exploiting time and space parallelism can be used to increase performance. Reduced instruction set computers (RISC) enhance performance of a single instruction stream through a simple load/store architecture. Data dependencies are eliminated by introducing NOP instructions in the stream. A longer pipeline increases the proportion of NOPs. These gaps may be used to interleave multiple instruction streams. A typical parallel organization based on message passing via main memory undermines the efficiency of a load/store architecture. The authors propose a method of sharing internal registers between instruction streams, forming a building block for efficient SIMD and MIMD systems.