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py/mpz: Fix bignum anding of large negative with smaller positive int.

This commit is contained in:
Damien George 2015-10-01 22:35:06 +01:00
parent a81539db25
commit 2065373f67
2 changed files with 4 additions and 6 deletions
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8
py/mpz.c
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@ -239,12 +239,8 @@ STATIC mp_uint_t mpn_and_neg(mpz_dig_t *idig, const mpz_dig_t *jdig, mp_uint_t j
carry >>= DIG_SIZE;
}
if (carry != 0) {
*idig = carry;
} else {
// remove trailing zeros
for (--idig; idig >= oidig && *idig == 0; --idig) {
}
// remove trailing zeros
for (--idig; idig >= oidig && *idig == 0; --idig) {
}
return idig + 1 - oidig;

2
tests/basics/int_big_and.py
View File

@ -24,3 +24,5 @@ print(-2345678901234567890123456789 & a)
print((-a) & a)
print((-a) & 0xffffffff)
print((-a) & 0xffffffffffffffffffffffffffffffff)
print((-a) & 2)
print((-(1 << 70)) & 2)