Prefetching Examples?

Question

Can anyone give an example or a link to an example which uses __builtin_prefetch in GCC (or just the asm instruction prefetcht0 in general) to gain a substantia

Answer 1

From the documentation:

      for (i = 0; i < n; i++)
        {
          a[i] = a[i] + b[i];
          __builtin_prefetch (&a[i+j], 1, 1);
          __builtin_prefetch (&b[i+j], 0, 1);
          /* ... */
        }