int main()
{
int i;
vsip_cscalar_d z;
vsip_scalar_d data[N]; /* a public data space for I/O */
vsip_fft_d *rcfftNop;
vsip_block_d *block;
vsip_vview_d *xin;
vsip_cvview_d *yout;
vsip_init((void *)0);
rcfftNop = /* Create an out-of-place Real->Cmplx N-pt FFT */
vsip_rcfftop_create_d(N, 1.0, 1, VSIP_ALG_TIME);
/* Create a block object and bind it to the array data */
block = vsip_blockbind_d(data, N, VSIP_MEM_NONE);
xin = vsip_vbind_d(block, 0, 1, N);
/* Create another block and complex vector view for the
symmetric output */
yout = vsip_cvcreate_d((N/2)+1, VSIP_MEM_NONE);
/* Admit block to VSIPL for processing and initialize with a
linear ramp */
vsip_blockadmit_d(block, VSIP_FALSE);
vsip_vramp_d(0.0, 1.0, xin);
/* Compute an out-of-place Real->Cmplx N-pt FFT using the
rcfftNop object */
vsip_rcfftop_d(rcfftNop, xin, yout);
/* print it */
printf("Real Input Vector\n");
for(i=0; i<N; i++)
{
printf("%g\n", vsip_vget_d(xin,i));
}
printf("\nComplex Output Vector\n");
for(i=0; i<(N/2)+1; i++)
{
z = vsip_cvget_d(yout,i);
printf(SCMPLX "\n", ACMPLX(z));
}
/* Destroy the rcfftNop, blocks, and view objects */
vsip_fft_destroy_d(rcfftNop);
vsip_valldestroy_d(xin);
vsip_cvalldestroy_d(yout);
vsip_finalize((void *)0);
return(0);
}
static fft_type *create(vsip_length l, vsip_scalar_d s, unsigned int n)
{ return vsip_rcfftop_create_d(l, s, n, VSIP_ALG_SPACE);}
