#!./perl
-print "1..4\n";
+print "1..12\n";
sub try ($$) {
print +($_[1] ? "ok" : "not ok"), " $_[0]\n";
try 2, -13 % 4 == 3;
try 3, 13 % -4 == -3;
try 4, -13 % -4 == -1;
+
+my $limit = 1e6;
+
+# Division (and modulo) of floating point numbers
+# seem to be rather sloppy in Cray.
+$limit = 1e8 if $^O eq 'unicos';
+
+try 5, abs( 13e21 % 4e21 - 1e21) < $limit;
+try 6, abs(-13e21 % 4e21 - 3e21) < $limit;
+try 7, abs( 13e21 % -4e21 - -3e21) < $limit;
+try 8, abs(-13e21 % -4e21 - -1e21) < $limit;
+
+# UVs should behave properly
+
+try 9, 4063328477 % 65535 == 27407;
+try 10, 4063328477 % 4063328476 == 1;
+try 11, 4063328477 % 2031664238 == 1;
+try 12, 2031664238 % 4063328477 == 2031664238;