1 files changed, 23 insertions, 9 deletions
diff --git a/mrblib/numeric.rb b/mrblib/numeric.rb
index cf608b04b..6e4c5027f 100644
--- a/mrblib/numeric.rb
+++ b/mrblib/numeric.rb
@@ -100,7 +100,7 @@ module Integral
   # Calls the given block from +self+ to +num+
   # incremented by +step+ (default 1).
   #
-  def step(num, step=1, &block)
+  def step(num, step = 1, &block)
     raise ArgumentError, "step can't be 0" if step == 0
     return to_enum(:step, num, step) unless block_given?
 
@@ -165,16 +165,30 @@ class Float
   # floats should be compatible to integers.
   def >> other
     n = self.to_i
-    other.to_i.times {
-      n /= 2
-    }
-    n
+    other = other.to_i
+    if other < 0
+      n << -other
+    else
+      other.times { n /= 2 }
+      if n.abs < 1
+        if n >= 0
+          0
+        else
+          -1
+        end
+      else
+        n.to_i
+      end
+    end
   end
   def << other
     n = self.to_i
-    other.to_i.times {
-      n *= 2
-    }
-    n.to_i
+    other = other.to_i
+    if other < 0
+      n >> -other
+    else
+      other.times { n *= 2 }
+      n
+    end
   end
 end