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diff --git a/t/op/bop.t b/t/op/bop.t
index 8ebf8d3..c433875 100755
--- a/t/op/bop.t
+++ b/t/op/bop.t
@@ -1,24 +1,186 @@
 #!./perl
 
 #
-# test the bit operators '&', '|' and '^'
+# test the bit operators '&', '|', '^', '~', '<<', and '>>'
 #
 
-print "1..9\n";
+BEGIN {
+    chdir 't' if -d 't';
+    @INC = '../lib';
+}
+
+print "1..44\n";
 
 # numerics
 print ((0xdead & 0xbeef) == 0x9ead ? "ok 1\n" : "not ok 1\n");
 print ((0xdead | 0xbeef) == 0xfeef ? "ok 2\n" : "not ok 2\n");
 print ((0xdead ^ 0xbeef) == 0x6042 ? "ok 3\n" : "not ok 3\n");
+print ((~0xdead & 0xbeef) == 0x2042 ? "ok 4\n" : "not ok 4\n");
+
+# shifts
+print ((257 << 7) == 32896 ? "ok 5\n" : "not ok 5\n");
+print ((33023 >> 7) == 257 ? "ok 6\n" : "not ok 6\n");
+
+# signed vs. unsigned
+print ((~0 > 0 && do { use integer; ~0 } == -1)
+       ? "ok 7\n" : "not ok 7\n");
+
+my $bits = 0;
+for (my $i = ~0; $i; $i >>= 1) { ++$bits; }
+my $cusp = 1 << ($bits - 1);
+
+print ((($cusp & -1) > 0 && do { use integer; $cusp & -1 } < 0)
+       ? "ok 8\n" : "not ok 8\n");
+print ((($cusp | 1) > 0 && do { use integer; $cusp | 1 } < 0)
+       ? "ok 9\n" : "not ok 9\n");
+print ((($cusp ^ 1) > 0 && do { use integer; $cusp ^ 1 } < 0)
+       ? "ok 10\n" : "not ok 10\n");
+print (((1 << ($bits - 1)) == $cusp &&
+	do { use integer; 1 << ($bits - 1) } == -$cusp)
+       ? "ok 11\n" : "not ok 11\n");
+print ((($cusp >> 1) == ($cusp / 2) &&
+       do { use integer; abs($cusp >> 1) } == ($cusp / 2))
+       ? "ok 12\n" : "not ok 12\n");
+
+$Aaz = chr(ord("A") & ord("z"));
+$Aoz = chr(ord("A") | ord("z"));
+$Axz = chr(ord("A") ^ ord("z"));
 
 # short strings
-print (("AAAAA" & "zzzzz") eq '@@@@@' ? "ok 4\n" : "not ok 4\n");
-print (("AAAAA" | "zzzzz") eq '{{{{{' ? "ok 5\n" : "not ok 5\n");
-print (("AAAAA" ^ "zzzzz") eq ';;;;;' ? "ok 6\n" : "not ok 6\n");
+print (("AAAAA" & "zzzzz") eq ($Aaz x 5) ? "ok 13\n" : "not ok 13\n");
+print (("AAAAA" | "zzzzz") eq ($Aoz x 5) ? "ok 14\n" : "not ok 14\n");
+print (("AAAAA" ^ "zzzzz") eq ($Axz x 5) ? "ok 15\n" : "not ok 15\n");
 
 # long strings
 $foo = "A" x 150;
 $bar = "z" x 75;
-print (($foo & $bar) eq ('@'x75 ) ? "ok 7\n" : "not ok 7\n");
-print (($foo | $bar) eq ('{'x75 . 'A'x75) ? "ok 8\n" : "not ok 8\n");
-print (($foo ^ $bar) eq (';'x75 . 'A'x75) ? "ok 9\n" : "not ok 9\n");
+$zap = "A" x 75;
+# & truncates
+print (($foo & $bar) eq ($Aaz x 75 ) ? "ok 16\n" : "not ok 16\n");
+# | does not truncate
+print (($foo | $bar) eq ($Aoz x 75 . $zap) ? "ok 17\n" : "not ok 17\n");
+# ^ does not truncate
+print (($foo ^ $bar) eq ($Axz x 75 . $zap) ? "ok 18\n" : "not ok 18\n");
+
+#
+print "ok \xFF\xFF\n" & "ok 19\n";
+print "ok 20\n" | "ok \0\0\n";
+print "o\000 \0001\000" ^ "\000k\0002\000\n";
+
+#
+print "ok \x{FF}\x{FF}\n" & "ok 22\n";
+print "ok 23\n" | "ok \x{0}\x{0}\n";
+print "o\x{0} \x{0}4\x{0}" ^ "\x{0}k\x{0}2\x{0}\n";
+
+#
+print "ok 25\n" if sprintf("%vd", v4095 & v801) eq 801;
+print "ok 26\n" if sprintf("%vd", v4095 | v801) eq 4095;
+print "ok 27\n" if sprintf("%vd", v4095 ^ v801) eq 3294;
+
+#
+print "ok 28\n" if sprintf("%vd", v4095.801.4095 & v801.4095) eq '801.801';
+print "ok 29\n" if sprintf("%vd", v4095.801.4095 | v801.4095) eq '4095.4095.4095';
+print "ok 30\n" if sprintf("%vd", v801.4095 ^ v4095.801.4095) eq '3294.3294.4095';
+#
+print "ok 31\n" if sprintf("%vd", v120.300 & v200.400) eq '72.256';
+print "ok 32\n" if sprintf("%vd", v120.300 | v200.400) eq '248.444';
+print "ok 33\n" if sprintf("%vd", v120.300 ^ v200.400) eq '176.188';
+#
+my $a = v120.300;
+my $b = v200.400;
+$a ^= $b;
+print "ok 34\n" if sprintf("%vd", $a) eq '176.188';
+my $a = v120.300;
+my $b = v200.400;
+$a |= $b;
+print "ok 35\n" if sprintf("%vd", $a) eq '248.444';
+
+#
+# UTF8 ~ behaviour
+#
+
+my $Is_EBCDIC = (ord('A') == 193) ? 1 : 0;
+
+my @not36;
+
+for (0x100...0xFFF) {
+  $a = ~(chr $_);
+  if ($Is_EBCDIC) {
+      push @not36, sprintf("%#03X", $_)
+          if $a ne chr(~$_) or length($a) != 1;
+  }
+  else {
+      push @not36, sprintf("%#03X", $_)
+          if $a ne chr(~$_) or length($a) != 1 or ~$a ne chr($_);
+  }
+}
+if (@not36) {
+    print "# test 36 failed\n";
+    print "not ";
+}
+print "ok 36\n";
+
+my @not37;
+
+for my $i (0xEEE...0xF00) {
+  for my $j (0x0..0x120) {
+    $a = ~(chr ($i) . chr $j);
+    if ($Is_EBCDIC) {
+        push @not37, sprintf("%#03X %#03X", $i, $j)
+	    if $a ne chr(~$i).chr(~$j) or
+	       length($a) != 2;
+    }
+    else {
+        push @not37, sprintf("%#03X %#03X", $i, $j)
+	    if $a ne chr(~$i).chr(~$j) or
+	       length($a) != 2 or 
+               ~$a ne chr($i).chr($j);
+    }
+  }
+}
+if (@not37) {
+    print "# test 37 failed\n";
+    print "not ";
+}
+print "ok 37\n";
+
+print "not " unless ~chr(~0) eq "\0" or $Is_EBCDIC;
+print "ok 38\n";
+
+my @not39;
+
+for my $i (0x100..0x120) {
+    for my $j (0x100...0x120) {
+	push @not39, sprintf("%#03X %#03X", $i, $j)
+	    if ~(chr($i)|chr($j)) ne (~chr($i)&~chr($j));
+    }
+}
+if (@not39) {
+    print "# test 39 failed\n";
+    print "not ";
+}
+print "ok 39\n";
+
+my @not40;
+
+for my $i (0x100..0x120) {
+    for my $j (0x100...0x120) {
+	push @not40, sprintf("%#03X %#03X", $i, $j)
+	    if ~(chr($i)&chr($j)) ne (~chr($i)|~chr($j));
+    }
+}
+if (@not40) {
+    print "# test 40 failed\n";
+    print "not ";
+}
+print "ok 40\n";
+
+# More variations on 19 and 22.
+print "ok \xFF\x{FF}\n" & "ok 41\n";
+print "ok \x{FF}\xFF\n" & "ok 42\n";
+
+# Tests to see if you really can do casts negative floats to unsigned properly
+$neg1 = -1.0;
+print ((~ $neg1 == 0) ? "ok 43\n" : "not ok 43\n");
+$neg7 = -7.0;
+print ((~ $neg7 == 6) ? "ok 44\n" : "not ok 44\n");