    fxp_sub            68 clib/conv.c       if ((f2 = fxp_sub(s1, f1)) == FXP_OT_NULL)
    fxp_sub            66 include/fxp.h  struct fxp *fxp_sub(struct fxp *, struct fxp *);
    fxp_sub           250 source/fxpstres.c    if ((result = fxp_sub(fxp1, fxp2)) == FXP_OT_NULL)
    fxp_sub          2003 source/sched.c          if ((ftmp = fxp_sub(bal_planned, planned)) == FXP_OT_NULL)
    fxp_sub          2056 source/sched.c          if ((ftmp = fxp_sub(bal_actual, actual)) == FXP_OT_NULL)