Sep 2, 2015in computing, sisd is a computer architecture in which a single uni-core processor, executes a single instruction stream, to operate on data stored in a single memory. Sisd:单指令单数据,低端mcu的处理器基本都是这种,比如cortex-m0/3; simd:单条指令操纵多个数据元素,包括array processor和vector processor; misd:多条指令控制单一数据,实际上非常. In computing, sisd (single instruction stream, single data stream) is a computer architecture in which a single uni-core processor, executes a single instruction stream, to.