SSE2 prefetch example (M. Lüscher)

Using inlining assembler in GCC:

#define _prefetch_su3(addr) \

__asm__ __volatile__ ("prefetcht0 %0 \n\t" \

"prefetcht0 %1" \

: \

"m" (*(((char*)((unsigned int)(addr))))), \

"m" (*(((char*)((unsigned int)(addr)))+128)))

...

su3 *um;

....

um=&gauge_field[iy][0];

_prefetch_su3(um);