int main () {
vsip_init((void*)0);{
double time0, time_rc=0, time_cr=0;
int i;
/*int k; for(k=0; k<4; k++)*/{
vsip_cvview_f* vectorOut = vsip_cvcreate_f(L/2 + 1,VSIP_MEM_NONE);
vsip_vview_f* vectorIn = vsip_vcreate_f(L,VSIP_MEM_NONE);
vsip_vview_f* ivectorOut = vsip_vcreate_f(L,VSIP_MEM_NONE);
vsip_fft_f* fftplan = vsip_rcfftop_create_f(L,1.0/L,0,VSIP_ALG_SPACE);
vsip_fft_f* ifftplan = vsip_crfftop_create_f(L,(double)(1.0),0,VSIP_ALG_TIME);
char printbuffer[10][40];
/* char printbuffer[L/2][40]; */
vsip_vramp_f(0, 2 * M_PI * F, vectorIn);
vsip_vcos_f(vectorIn,vectorIn);
/* print vectorIn */
/* for(i=0; i<L/2; i++) */
for(i=0; i<10; i++)
sprintf(printbuffer[i],"%2d, %2d input-> %7.3f, %7.3f",
i, i+L/2, vsip_vget_f(vectorIn,i), vsip_vget_f(vectorIn,i+L/2));
/*find the fft*/
for(i=0; i<N; i++){
/* printf("%d\n",i);fflush(stdout); */
time0=VU_ansi_c_clock();
vsip_rcfftop_f(fftplan,vectorIn,vectorOut);
time_rc += (VU_ansi_c_clock() - time0);
/*find the inverse fft*/
time0=VU_ansi_c_clock();
vsip_crfftop_f(ifftplan,vectorOut,ivectorOut);
time_cr += (VU_ansi_c_clock() - time0);
}
/*print it */
/* for(i=0; i<L/2; i++) */
for(i=0; i<10; i++)
printf("%s fft -> (%9.4f, %9.4f) ifft-> %7.3f, %7.3f\n" ,
printbuffer[i],
vsip_real_f(vsip_cvget_f(vectorOut,i)),
vsip_imag_f(vsip_cvget_f(vectorOut,i)),
vsip_vget_f(ivectorOut,i),
vsip_vget_f(ivectorOut,i+L/2));
printf(" fft -> (%9.4f, %9.4f)\n",
vsip_real_f(vsip_cvget_f(vectorOut,i)),
vsip_imag_f(vsip_cvget_f(vectorOut,i)));
{/* test vsip_fft_getattr_f */
vsip_fft_attr_f attr;
vsip_fft_getattr_f(fftplan, &attr);
printf("%lu %lu %d %f %d\n",attr.input,attr.output,attr.place,attr.scale,attr.dir);
vsip_fft_getattr_f(ifftplan, &attr);
printf("%lu %lu %d %f %d\n",attr.input,attr.output,attr.place,attr.scale,attr.dir);
}
vsip_cvalldestroy_f(vectorOut);
vsip_valldestroy_f(vectorIn);
vsip_fft_destroy_f(fftplan);
printf("time_rc %f; time_cr %f\n",time_rc/(double)N, time_cr/(double)N);
}
}
vsip_finalize((void*)0);
return 0;
}
static fft_type *create(vsip_length l, vsip_scalar_f s, unsigned int n)
{ return vsip_rcfftop_create_f(l, s, n, VSIP_ALG_SPACE);}