void VU_vfreqswapIP_d(vsip_vview_d* b)
{ vsip_length N = vsip_vgetlength_d(b);
if(N%2){/* odd */
vsip_vview_d *a1 = vsip_vsubview_d(b,
(vsip_index)(N/2)+1,
(vsip_length)(N/2));
vsip_vview_d *a2 = vsip_vsubview_d(b,
(vsip_index)0,
(vsip_length)(N/2)+1);
vsip_vview_d *a3 = vsip_vcreate_d((vsip_length)(N/2)+1,
VSIP_MEM_NONE);
vsip_vcopy_d_d(a2,a3);
vsip_vputlength_d(a2,(vsip_length)(N/2));
vsip_vcopy_d_d(a1,a2);
vsip_vputlength_d(a2,(vsip_length)(N/2) + 1);
vsip_vputoffset_d(a2,(vsip_offset)(N/2));
vsip_vcopy_d_d(a3,a2);
vsip_vdestroy_d(a1); vsip_vdestroy_d(a2);
vsip_valldestroy_d(a3);
}else{ /* even */
vsip_vview_d *a1 = vsip_vsubview_d(b,
(vsip_index)(N/2),
(vsip_length)(N/2));
vsip_vputlength_d(b,(vsip_length)(N/2));
vsip_vswap_d(b,a1);
vsip_vdestroy_d(a1);
vsip_vputlength_d(b,N);
}
return;
}
vsip_mview_d* VU_I_d(vsip_length M)
{
vsip_mview_d *I = vsip_mcreate_d(M,M,VSIP_ROW,VSIP_MEM_NONE);
if(I != NULL){
vsip_vview_d *row = vsip_mrowview_d(I,0);
if(row != NULL){
vsip_vputlength_d(row,(vsip_length)(M * M));
vsip_vfill_d((vsip_scalar_d)0.0,row);
vsip_vputlength_d(row,M);
vsip_vputstride_d(row,(vsip_stride) (M + 1));
vsip_vfill_d((vsip_scalar_d)1.0,row);
vsip_vdestroy_d(row);
} else {
vsip_mdestroy_d(I);
return (vsip_mview_d*) NULL;
}
} else {
return (vsip_mview_d*) NULL;
}
return I;
}
int main()
{
vsip_vview_d *dataA;
vsip_vview_d *dataB;
vsip_vview_vi *Index;
vsip_vview_bl *dataBl;
int i;
vsip_length N;
vsip_init((void *)0);
dataA = vsip_vcreate_d(L, VSIP_MEM_NONE);
dataB = vsip_vcreate_d(L, VSIP_MEM_NONE);
Index = vsip_vcreate_vi(L, VSIP_MEM_NONE);
dataBl= vsip_vcreate_bl(L, VSIP_MEM_NONE);
/* make up some data */
vsip_vramp_d(0,2 * PI/(L-1),dataA);
vsip_vcos_d(dataA,dataB);
/* find out where dataB is greater than zero */
vsip_vfill_d(0,dataA);
vsip_vlgt_d(dataB,dataA,dataBl);
/* find the index where dataB is greater than zero */
if((N = vsip_vindexbool(dataBl,Index)))
{
/* make a vector of those points where dataB is greater than zero*/
vsip_vgather_d(dataB,Index,vsip_vputlength_d(dataA,N));
/*print out the results */
printf("Index Value\n");
for(i=0; i<N; i++)
printf("%li %6.3f\n",
vsip_vget_vi(Index,i),
vsip_vget_d(dataA,i));
}
else
{
printf("Zero Length Index");
exit(0);
}
vsip_vfill_d(0,dataB);
vsip_vscatter_d(dataA,dataB,Index);
for(i=0; i<L; i++)
printf("%6.3f\n",vsip_vget_d(dataB,i));
/*recover the data space*/
vsip_blockdestroy_d(vsip_vdestroy_d(dataA));
vsip_blockdestroy_d(vsip_vdestroy_d(dataB));
vsip_blockdestroy_vi(vsip_vdestroy_vi(Index));
vsip_blockdestroy_bl(vsip_vdestroy_bl(dataBl));
vsip_finalize((void *)0);
return 0;
}
