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Group for little helpers

This group contains little helpers, e.g. More...

Functions

double second ()
 Actual used CPU time in seconds.
int next_power_of_2 (int N)
 Computes /f$n N/f$ such that /f$n=2^j,\, j{N}_0/f$.
void next_power_of_2_exp (int N, int *N2, int *t)
 Computes /f$n N/f$ such that /f$n=2^j,\, j{N}_0/f$.
int nfft_prod_int (int *vec, int d)
 Computes integer /f${t=0}^{d-1} v_t/f$.
int nfct_prod_int (int *vec, int d)
 Computes integer /f${t=0}^{d-1} v_t/f$.
int nfst_prod_minus_a_int (int *vec, int a, int d)
 Computes integer /f${t=0}^{d-1} v_t-a/f$.
int nfft_plain_loop (int *idx, int *N, int d)
 Computes /f${t=0}^{d-1} i_t {t'=t+1}^{d-1} N_{t'}/f$.
double nfft_prod_real (double *vec, int d)
 Computes double /f${t=0}^{d-1} v_t/f$.

Detailed Description

This group contains little helpers, e.g.

for timing, ...


Function Documentation

double second  ) 
 

Actual used CPU time in seconds.

Calls getrusage, limited accuracy


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