void merge(real_t *RESTRICT v, real_t *RESTRICT we, real_t *RESTRICT wo, int ieo_origin, int nin, int *Nsize)
Domain-wall fermion operator with even-odd site index.
void split(real_t *RESTRICT ve, real_t *RESTRICT vo, real_t *RESTRICT w, int ieo_origin, int nin, int *Nsize)