Any instruction placed inside this construct is equivalent to writing that instruction count number of times, each on a separate line. 这个结构中的任何指令都相当于编写这个指令count次,每次重复占据单独的一行。
The SPU instruction clz ( count leading zeroes, called spu_cntlz in the C language intrinsics ) is perfect for this. SPU指令clz(countleadingzeroes,计算前导零;在C语言intrinsic中称为spucntlz)很适合进行这样的转换。