Function silc_mp_div_2exp_qr
SYNOPSIS
void silc_mp_div_2exp_qr(SilcMPInt *q, SilcMPInt *r, SilcMPInt *mp1,
uint32 exp);
DESCRIPTION
Divide the `mp1' with 2 ** `exp' and save the quotient to `q' and
the remainder to `r'. This is equivalent to q = mp1 / (2 ^ exp),
r = mp1 mod (2 ^ exp). If the `q' or `r' is NULL then the operation
is omitted.