X-Git-Url: https://git.openssl.org/gitweb/?p=openssl.git;a=blobdiff_plain;f=test%2Frecipes%2Fbc.pl;h=f7d4dc681d7d95431cb67bc7df56e34f53bf7ca4;hp=29a4a8a84a0789064d04a86e4fd54ac6a70c2f0e;hb=ce84456ddf4e57c18a84858755b8b90c183a270e;hpb=c828cd7cd0426dde10b07e7b68f3741a5ea91fc6

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