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/* { dg-do compile } */
#include <altivec.h>
extern vector signed short image[];
extern vector signed short band[];
#define load(a,b) vec_ld((b)*16, a)
#define store(v,a,b) vec_st(v,(b)*16,a)
void
haar (vector signed char a, vector signed char b, vector signed char c,
vector signed char d, unsigned int N, int XX)
{
unsigned int i;
vector unsigned char high, low;
vector signed int zero = ((vector signed int){0,0,0,0});
for (i = 0; i < N; i++) {
high = (vector unsigned char) (vec_vmrghh (load(image, i+XX),
load(image, i)));
low = (vector unsigned char) (vec_vmrglh (load(image, i+XX),
load(image, i)));
store (vec_vpkswss (vec_vmsummbm (a, high, zero),
vec_vmsummbm (a, low, zero)),
band, i);
store (vec_vpkswss (vec_vmsummbm (b, high, zero),
vec_vmsummbm (b, low, zero)),
band, i+1);
store(vec_vpkswss (vec_vmsummbm (c, high, zero),
vec_vmsummbm (c, low, zero)),
band, i+2);
store(vec_vpkswss (vec_vmsummbm (d, high, zero),
vec_vmsummbm (d, low, zero)),
band, i+3);
}
}
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