diff options
| -rw-r--r-- | test/recipes/bc.pl | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/test/recipes/bc.pl b/test/recipes/bc.pl index 29a4a8a84a..f7d4dc681d 100644 --- a/test/recipes/bc.pl +++ b/test/recipes/bc.pl @@ -46,7 +46,16 @@ sub __multiplier { if ($operator eq "*") { $operand1->bmul($operand2); } elsif ($operator eq "/") { + # Math::BigInt->bdiv() is documented to do floored division, + # i.e. 1 / -4 = -1, while bc and OpenSSL BN_div do truncated + # division, i.e. 1 / -4 = 0. We need to make the operation + # work like OpenSSL's BN_div to be able to verify. + my $neg = ($operand1->is_neg() + ? !$operand2->is_neg() : $operand2->is_neg()); + $operand1->babs(); + $operand2->babs(); $operand1->bdiv($operand2); + if ($neg) { $operand1->bneg(); } } elsif ($operator eq "%") { # Here's a bit of a quirk... # With OpenSSL's BN, as well as bc, the result of -10 % 3 is -1 |