gcc/testsuite/gcc.misc-tests/i386-pf-athlon-1.c

   1 /* Test that the correct data prefetch instructions are generated for i386
   2    variants that use 3DNow! prefetchw or SSE prefetch instructions with
   3    locality hints.  */
   4
   5 /* { dg-do compile { target i?86-*-* x86_64-*-* } } */
   6 /* { dg-require-effective-target ilp32 } */
   7
   8 extern void exit (int);
   9
  10 char *msg = "howdy there";
  11
  12 void foo (char *p)
  13 {
  14   __builtin_prefetch (p, 0, 0);
  15   __builtin_prefetch (p, 0, 1);
  16   __builtin_prefetch (p, 0, 2);
  17   __builtin_prefetch (p, 0, 3);
  18   __builtin_prefetch (p, 1, 0);
  19   __builtin_prefetch (p, 1, 1);
  20   __builtin_prefetch (p, 1, 2);
  21   __builtin_prefetch (p, 1, 3);
  22 }
  23
  24 int main ()
  25 {
  26   foo (msg);
  27   exit (0);
  28 }
  29
  30 /* { dg-final { scan-assembler "prefetchw" } } */
  31 /* { dg-final { scan-assembler "prefetchnta" } } */
  32 /* { dg-final { scan-assembler "prefetcht" } } */