gcc/testsuite/gcc.target/powerpc/swaps-p8-22.c

   1 /* { dg-do compile } */
   2 /* { dg-require-effective-target powerpc_p8vector_ok } */
   3 /* { dg-options "-O2 -mdejagnu-cpu=power8 -maltivec -mcmodel=large" } */
   4
   5 /* The expansion for vector character multiply introduces a vperm operation.
   6    This tests that changing the vperm mask allows us to remove all swaps
   7    from the generated code.  It is a duplicate of swaps-p8-21.c, except
   8    that it applies the large code model, which requires an extra indirection
   9    in the load of the constant mask.  */
  10
  11 #include <altivec.h>
  12
  13 void abort ();
  14
  15 vector unsigned char r;
  16 vector unsigned char v =
  17   { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 };
  18 vector unsigned char i =
  19   { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 };
  20
  21 int main ()
  22 {
  23   int j;
  24   r = v * i;
  25   return 0;
  26 }
  27
  28 /* { dg-final { scan-assembler-times "vperm" 1 } } */
  29 /* { dg-final { scan-assembler-not "xxpermdi" } } */