Specifies the prefetch distance to be used for compiler-generated prefetches inside loops.
- n1, n2
- Is the prefetch distance in terms of the number of (possibly-vectorized) iterations. Possible values are non-negative numbers >=0.n2is optional.n1= 0 turns off all compiler issued prefetches from memory to L2.n2= 0 turns off all compiler issued prefetches from L2 to L1. Ifn2is specified andn1> 0,n1should be >=