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diff --git a/deps/v8/test/mjsunit/to-precision.js b/deps/v8/test/mjsunit/to-precision.js
new file mode 100644
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+++ b/deps/v8/test/mjsunit/to-precision.js
@@ -0,0 +1,82 @@
+// Copyright 2008 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Test the exponential notation output.
+assertEquals("1e+27", (1.2345e+27).toPrecision(1));
+assertEquals("1.2e+27", (1.2345e+27).toPrecision(2));
+assertEquals("1.23e+27", (1.2345e+27).toPrecision(3));
+assertEquals("1.234e+27", (1.2345e+27).toPrecision(4));
+assertEquals("1.2345e+27", (1.2345e+27).toPrecision(5));
+assertEquals("1.23450e+27", (1.2345e+27).toPrecision(6));
+assertEquals("1.234500e+27", (1.2345e+27).toPrecision(7));
+
+assertEquals("-1e+27", (-1.2345e+27).toPrecision(1));
+assertEquals("-1.2e+27", (-1.2345e+27).toPrecision(2));
+assertEquals("-1.23e+27", (-1.2345e+27).toPrecision(3));
+assertEquals("-1.234e+27", (-1.2345e+27).toPrecision(4));
+assertEquals("-1.2345e+27", (-1.2345e+27).toPrecision(5));
+assertEquals("-1.23450e+27", (-1.2345e+27).toPrecision(6));
+assertEquals("-1.234500e+27", (-1.2345e+27).toPrecision(7));
+
+
+// Test the fixed notation output.
+assertEquals("7", (7).toPrecision(1));
+assertEquals("7.0", (7).toPrecision(2));
+assertEquals("7.00", (7).toPrecision(3));
+
+assertEquals("-7", (-7).toPrecision(1));
+assertEquals("-7.0", (-7).toPrecision(2));
+assertEquals("-7.00", (-7).toPrecision(3));
+
+assertEquals("9e+1", (91).toPrecision(1));
+assertEquals("91", (91).toPrecision(2));
+assertEquals("91.0", (91).toPrecision(3));
+assertEquals("91.00", (91).toPrecision(4));
+
+assertEquals("-9e+1", (-91).toPrecision(1));
+assertEquals("-91", (-91).toPrecision(2));
+assertEquals("-91.0", (-91).toPrecision(3));
+assertEquals("-91.00", (-91).toPrecision(4));
+
+assertEquals("9e+1", (91.1234).toPrecision(1));
+assertEquals("91", (91.1234).toPrecision(2));
+assertEquals("91.1", (91.1234).toPrecision(3));
+assertEquals("91.12", (91.1234).toPrecision(4));
+assertEquals("91.123", (91.1234).toPrecision(5));
+assertEquals("91.1234", (91.1234).toPrecision(6));
+assertEquals("91.12340", (91.1234).toPrecision(7));
+assertEquals("91.123400", (91.1234).toPrecision(8));
+
+assertEquals("-9e+1", (-91.1234).toPrecision(1));
+assertEquals("-91", (-91.1234).toPrecision(2));
+assertEquals("-91.1", (-91.1234).toPrecision(3));
+assertEquals("-91.12", (-91.1234).toPrecision(4));
+assertEquals("-91.123", (-91.1234).toPrecision(5));
+assertEquals("-91.1234", (-91.1234).toPrecision(6));
+assertEquals("-91.12340", (-91.1234).toPrecision(7));
+assertEquals("-91.123400", (-91.1234).toPrecision(8));
+