py/modbuiltins: Implement abs() by dispatching to MP_UNARY_OP_ABS.

This allows user classes to implement __abs__ special method, and saves
code size (104 bytes for x86_64), even though during refactor, an issue
was fixed and few optimizations were made:

* abs() of minimum (negative) small int value is calculated properly.
* objint_longlong and objint_mpz avoid allocating new object is the
  argument is already non-negative.

1 files changed, 0 insertions, 10 deletions

diff --git a/py/objint.c b/py/objint.c
index 6a73b4382..000a0404c 100644
--- a/py/objint.c
+++ b/py/objint.c
@@ -314,16 +314,6 @@ int mp_obj_int_sign(mp_obj_t self_in) {
     }
 }
 
-// This must handle int and bool types, and must raise a
-// TypeError if the argument is not integral
-mp_obj_t mp_obj_int_abs(mp_obj_t self_in) {
-    mp_int_t val = mp_obj_get_int(self_in);
-    if (val < 0) {
-        val = -val;
-    }
-    return MP_OBJ_NEW_SMALL_INT(val);
-}
-
 // This is called for operations on SMALL_INT that are not handled by mp_unary_op
 mp_obj_t mp_obj_int_unary_op(mp_unary_op_t op, mp_obj_t o_in) {
     return MP_OBJ_NULL; // op not supported