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| author | Damien George <damien.p.george@gmail.com> | 2014-05-12 23:27:29 +0100 |
|---|---|---|
| committer | Damien George <damien.p.george@gmail.com> | 2014-05-12 23:27:29 +0100 |
| commit | 561e42590307efd3f279e903e599f3894080a4df (patch) | |
| tree | eb757f2d8861679fb605d7419fe3a438bf6329a9 | |
| parent | cc97446ca588d15e67cc126035802e183fab70a9 (diff) | |
| download | micropython-561e42590307efd3f279e903e599f3894080a4df.tar.gz micropython-561e42590307efd3f279e903e599f3894080a4df.zip | |
py: Fix bug in mpz_and function.
Addresses issue #610.
| -rw-r--r-- | py/mpz.c | 4 | ||||
| -rw-r--r-- | tests/basics/int-big-and.py | 8 |
2 files changed, 10 insertions, 2 deletions
@@ -213,8 +213,8 @@ STATIC uint mpn_and(mpz_dig_t *idig, const mpz_dig_t *jdig, uint jlen, const mpz *idig = *jdig & *kdig; } - for (; jlen > 0; --jlen, ++idig) { - *idig = 0; + // remove trailing zeros + for (; idig > oidig && *idig == 0; --idig) { } return idig - oidig; diff --git a/tests/basics/int-big-and.py b/tests/basics/int-big-and.py new file mode 100644 index 0000000000..75fbd52884 --- /dev/null +++ b/tests/basics/int-big-and.py @@ -0,0 +1,8 @@ +print(0 & (1 << 80)) +print(0 & (1 << 80) == 0) +print(bool(0 & (1 << 80))) + +#a = 0xfffffffffffffffffffffffffffff +#print(a & (1 << 80)) +#print((a & (1 << 80)) >> 80) +#print((a & (1 << 80)) >> 80 == 1) |