452 mp_sub (mp_int * a, mp_int * b, mp_int * c)  in mp_sub()  function
825       if ((res = mp_sub (&B, &x, &B)) != MP_OKAY) {  in mp_invmod_slow()
850       if ((res = mp_sub (&D, &x, &D)) != MP_OKAY) {  in mp_invmod_slow()
866     if ((res = mp_sub (&u, &v, &u)) != MP_OKAY) {  in mp_invmod_slow()
870     if ((res = mp_sub (&A, &C, &A)) != MP_OKAY) {  in mp_invmod_slow()
874     if ((res = mp_sub (&B, &D, &B)) != MP_OKAY) {  in mp_invmod_slow()
879     if ((res = mp_sub (&v, &u, &v)) != MP_OKAY) {  in mp_invmod_slow()
883     if ((res = mp_sub (&C, &A, &C)) != MP_OKAY) {  in mp_invmod_slow()
887     if ((res = mp_sub (&D, &B, &D)) != MP_OKAY) {  in mp_invmod_slow()
913       if ((res = mp_sub(&C, b, &C)) != MP_OKAY) {  in mp_invmod_slow()
1672         if (((res = mp_sub(&ta, &tb, &ta)) != MP_OKAY) ||  in mp_div()
1788     if ((res = mp_sub (&x, &y, &x)) != MP_OKAY) {  in mp_div()
1850     if ((res = mp_sub (&x, &t1, &x)) != MP_OKAY) {  in mp_div()
2339   if ((res = mp_sub (x, &q, x)) != MP_OKAY) {  in mp_reduce()