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| author | Damien George <damien.p.george@gmail.com> | 2017-07-25 11:49:22 +1000 |
|---|---|---|
| committer | Damien George <damien.p.george@gmail.com> | 2017-07-25 11:49:22 +1000 |
| commit | 04552ff71b6c722b21597d93481f024c72457cef (patch) | |
| tree | fdbc66843e079a78cbf964aa6308ab5db78a42d1 /py/objint_longlong.c | |
| parent | 4d1fb6107fdedb0dda8dfb1491c033bf731222c6 (diff) | |
| download | micropython-04552ff71b6c722b21597d93481f024c72457cef.tar.gz micropython-04552ff71b6c722b21597d93481f024c72457cef.zip | |
py: Implement raising a big-int to a negative power.
Before this patch raising a big-int to a negative power would just return
0. Now it returns a floating-point number with the correct value.
Diffstat (limited to 'py/objint_longlong.c')
| -rw-r--r-- | py/objint_longlong.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/py/objint_longlong.c b/py/objint_longlong.c index eb80407bcb..1d184a7dc2 100644 --- a/py/objint_longlong.c +++ b/py/objint_longlong.c @@ -191,6 +191,13 @@ mp_obj_t mp_obj_int_binary_op(mp_uint_t op, mp_obj_t lhs_in, mp_obj_t rhs_in) { case MP_BINARY_OP_POWER: case MP_BINARY_OP_INPLACE_POWER: { + if (rhs_val < 0) { + #if MICROPY_PY_BUILTINS_FLOAT + return mp_obj_float_binary_op(op, lhs_val, rhs_in); + #else + mp_raise_ValueError("negative power with no float support"); + #endif + } long long ans = 1; while (rhs_val > 0) { if (rhs_val & 1) { |