gcc/testsuite/gcc.dg/vmx/7-01a.c

   1 /* { dg-do compile } */
   2 #include <altivec.h>
   3 extern vector signed short image[];
   4 extern vector signed short band[];
   5
   6 #define load(a,b) vec_ld((b)*16, a)
   7 #define store(v,a,b) vec_st(v,(b)*16,a)
   8
   9 void
  10 haar (vector signed char a, vector signed char b, vector signed char c,
  11       vector signed char d, unsigned int N, int XX)
  12 {
  13   unsigned int i;
  14   vector unsigned char high, low;
  15   vector signed int zero = ((vector signed int){0,0,0,0});
  16
  17   for (i = 0; i < N; i++) {
  18     high = (vector unsigned char) (vec_vmrghh (load(image, i+XX),
  19                                                load(image, i)));
  20     low = (vector unsigned char) (vec_vmrglh (load(image, i+XX),
  21                                               load(image, i)));
  22
  23     store (vec_vpkswss (vec_vmsummbm (a, high, zero),
  24                         vec_vmsummbm (a, low, zero)),
  25            band, i);
  26     store (vec_vpkswss (vec_vmsummbm (b, high, zero),
  27                         vec_vmsummbm (b, low, zero)),
  28            band, i+1);
  29     store(vec_vpkswss (vec_vmsummbm (c, high, zero),
  30                        vec_vmsummbm (c, low, zero)),
  31           band, i+2);
  32     store(vec_vpkswss (vec_vmsummbm (d, high, zero),
  33                        vec_vmsummbm (d, low, zero)),
  34           band, i+3);
  35   }
  36 }