int main()
{
int i;
vsip_randstate *state;
vsip_cmview_d *xy;
vsip_cvview_d *xy_row;
vsip_length stride;
vsip_cvview_d *sum;
vsip_fftm_d *ccfftmip;
vsip_length seed =0, num_procs=1, id=1;
vsip_init((void *)0);
/* Initialize Random Number Generator */
state = vsip_randcreate(seed, num_procs, id, VSIP_PRNG);
/* Row major, 64 (ROWS) of 16 point data vectors */
xy = vsip_cmcreate_d(ROWS, 16, VSIP_ROW, VSIP_MEM_NONE);
/* Bind xy_row view initially to row 0 of xy */
xy_row = vsip_cmrowview_d(xy, 0);
/* Stride between column elements of xy */
stride = vsip_cmgetcolstride_d(xy);
sum = vsip_cvcreate_d(N, VSIP_MEM_NONE);
/* Create an in-place Cmplx->Cmplx Multiple N-pt FFT */
ccfftmip = vsip_ccfftmip_create_d(ROWS, N, 1.0, VSIP_FFT_FWD,
VSIP_ROW, 1, VSIP_ALG_TIME);
/* Initialize xy by rows with complex Gaussian noise N(0,1) */
for (i=0; i<ROWS; i++)
{
vsip_cvputoffset_d(xy_row, i*stride); /* view of row i of xy */
vsip_cvrand_d(state,xy_row); /* Initialize row i of xy */
}
/* Compute an in-place Cmplx->Cmplx Multiple N-pt FFT using the
ccfftmip object*/
vsip_ccfftmip_d(ccfftmip, xy);
/* Coherently sum the rows together (in the Freq domain) */
vsip_cvputoffset_d(xy_row, 0);
vsip_cvcopy_d_d(xy_row, sum); /* sum = row 0 of xy */
for (i=1; i<ROWS; i++)
{
vsip_cvputoffset_d(xy_row, i*stride); /* view of row i of xy */
vsip_cvadd_d(xy_row, sum, sum); /* sum += row i of xy */
}
/* Print it */
printf("\nComplex Output Vector (Real, Imag)\n");
for(i=0; i<N; i++)
printf("%d:\t" SCMPLX "\n", i, ACMPLX(vsip_cvget_d(sum,i)));
printf("\n");
/* Destroy all the objects */
vsip_fftm_destroy_d(ccfftmip);
vsip_cvdestroy(xy_row);
vsip_cvdestroy(sum);
vsip_cmalldestroy_d(xy);
vsip_randdestroy(state);
vsip_finalize((void *)0);
return(0);
}
static vsip_cmview_d* VU_cI_d(vsip_length M)
{
vsip_cmview_d *I = vsip_cmcreate_d(M,M,VSIP_ROW,VSIP_MEM_NONE);
if(I != NULL){
vsip_cvview_d *row = vsip_cmrowview_d(I,0);
if(row != NULL){
vsip_cvputlength_d(row,(vsip_length)(M * M));
vsip_cvfill_d(vsip_cmplx_d(0.0,0.0),row);
vsip_cvputlength_d(row,M);
vsip_cvputstride_d(row,(vsip_stride) (M + 1));
vsip_cvfill_d(vsip_cmplx_d(1.0,0.0),row);
vsip_cvdestroy_d(row);
} else {
vsip_cmdestroy_d(I);
return (vsip_cmview_d*) NULL;
}
} else {
return (vsip_cmview_d*) NULL;
}
return I;
}
