LibJS: Implement bitwise right shift operator (>>)

1 files changed, 7 insertions, 1 deletions

diff --git a/Libraries/LibJS/Runtime/Value.cpp b/Libraries/LibJS/Runtime/Value.cpp
index e3729317c6..5da5c5765f 100644
--- a/Libraries/LibJS/Runtime/Value.cpp
+++ b/Libraries/LibJS/Runtime/Value.cpp
@@ -264,7 +264,13 @@ Value left_shift(Interpreter&, Value lhs, Value rhs)
 
 Value right_shift(Interpreter&, Value lhs, Value rhs)
 {
-    return Value((i32)lhs.to_number().as_double() >> (i32)rhs.to_number().as_double());
+    auto lhs_number = lhs.to_number();
+    if (!lhs_number.is_finite_number())
+        return Value(0);
+    auto rhs_number = rhs.to_number();
+    if (!rhs_number.is_finite_number())
+        return lhs_number;
+    return Value((i32)lhs_number.as_double() >> (i32)rhs_number.as_double());
 }
 
 Value add(Interpreter& interpreter, Value lhs, Value rhs)