gcc/testsuite/gcc.dg/vect/vect-bswap16.c

   1 /* { dg-additional-options "-msse4" { target sse4_runtime } } */
   2
   3 #include "tree-vect.h"
   4
   5 #define N 128
   6
   7 static inline void
   8 vfoo16 (unsigned short int* a)
   9 {
  10   int i = 0;
  11   for (i = 0; i < N; ++i)
  12     a[i] = __builtin_bswap16 (a[i]);
  13 }
  14
  15 int
  16 main (void)
  17 {
  18   unsigned short arr[N];
  19   unsigned short expect[N];
  20   int i;
  21
  22   check_vect ();
  23
  24   for (i = 0; i < N; ++i)
  25     {
  26       arr[i] = i;
  27       expect[i] = __builtin_bswap16 (i);
  28       asm volatile ("" ::: "memory");
  29     }
  30
  31   vfoo16 (arr);
  32
  33 #pragma GCC novector
  34   for (i = 0; i < N; ++i)
  35     {
  36       if (arr[i] != expect[i])
  37         abort ();
  38     }
  39
  40   return 0;
  41 }
  42
  43 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target { vect_bswap || sse4_runtime } } } } */