SIMD俗称单指令流,多数据流,就是同一条指令被多个数据流的多处理器执行。SIMD通过将相同的操作以并行的方式应用在数据的各个项来实现数据级的并行。我们在选购处理器的时候,经常会关注指令集。我们以SSE为例,SSE俗称Streaming SIMD Extensions 的缩写,思想就是每个16字节的XMM寄存器可以存放多个值。可以存放4个int和float 或者两个double 。SSE指令可以使用这些xmm寄存器执行向量操作。 » Read more: CPU指令并行化(读书笔记)
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