gcc-4_9-branch/gcc/testsuite/gcc.target/powerpc/swaps-p8-18.c

   1 /* { dg-do compile { target { powerpc64le-*-* } } } */
   2 /* { dg-skip-if "do not override -mcpu" { powerpc*-*-* } { "-mcpu=*" } { "-mcpu=power8" } } */
   3 /* { dg-options "-mcpu=power8 -O3" } */
   4 /* { dg-final { scan-assembler-not "xxpermdi" } } */
   5
   6 /* This is a test for a specific convert-splat permute removal.  */
   7
   8 void compute (float*, float*, float*, int, int);
   9 double test (void);
  10 double gorp;
  11
  12 int main (void)
  13 {
  14   float X[10000], Y[256], Z[2000];
  15   int i;
  16   for (i = 0; i < 2500; i++)
  17     compute (X, Y, Z, 256, 2000);
  18   gorp = test ();
  19 }
  20
  21 void compute(float *X, float *Y, float *Z, int m, int n)
  22 {
  23   int i, j;
  24   float w, *x, *y;
  25
  26   for (i = 0; i < n; i++)
  27     {
  28       w = 0.0;
  29       x = X++;
  30       y = Y;
  31       for (j = 0; j < m; j++)
  32         w += (*x++) * (*y++);
  33       Z[i] = w;
  34     }
  35 }