* bignum.c (rb_big_rshift): should properly convert the nagative

  value to 2's compliment.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@2072 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 13 insertions, 0 deletions

diff --git a/sample/test.rb b/sample/test.rb
index d3773fe688..9778b6e4ca 100644
--- a/sample/test.rb
+++ b/sample/test.rb
@@ -809,6 +809,19 @@ b = 14269972710765292560
 test_ok(a % b == 0)
 test_ok(-a % b == 0)
 
+def shift_test(a)
+  b = a / (2 ** 32)
+  c = a >> 32
+  test_ok(b == c)
+
+  b = a * (2 ** 32)
+  c = a << 32
+  test_ok(b == c)
+end
+
+shift_test(-4518325415524767873)
+shift_test(-0xfffffffffffffffff)
+
 test_check "string & char"
 
 test_ok("abcd" == "abcd")