Add fast case stub for BIT_NOT.

bleeding_edge/test/mjsunit/bit-not.js

+// Copyright 2009 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.
+
+function testBitNot(x) {
+  // The VM constant folds so we use that to check the result.
+  var expected = eval("~(" + x + ")");
+  var actual = ~x;
+  assertEquals(expected, actual, "x: " + x);
+
+  // Test the path where we can overwrite the result. Use -
+  // to avoid concatenating strings.
+  expected = eval("~(" + x + " - 0.01)");
+  actual = ~(x - 0.01);
+  assertEquals(expected, actual, "x - 0.01: " + x);
+}
+
+
+testBitNot(0);
+testBitNot(1);
+testBitNot(-1);
+testBitNot(100);
+testBitNot(0x40000000);
+testBitNot(0x7fffffff);
+testBitNot(0x80000000);
+
+testBitNot(2.2);
+testBitNot(-2.3);
+testBitNot(Infinity);
+testBitNot(NaN);
+testBitNot(-Infinity);
+testBitNot(0x40000000 + 0.12345);
+testBitNot(0x40000000 - 0.12345);
+testBitNot(0x7fffffff + 0.12345);
+testBitNot(0x7fffffff - 0.12345);
+testBitNot(0x80000000 + 0.12345);
+testBitNot(0x80000000 - 0.12345);
+
+testBitNot("0");
+testBitNot("2.3");
+testBitNot("-9.4");
+
+
+// Try to test that we can deal with allocation failures in
+// the fast path and just use the slow path instead.
+function TryToGC() {
+  var x = 0x40000000;
+  for (var i = 0; i < 1000000; i++) {
+    assertEquals(~0x40000000, ~x);
+  }
+}
+TryToGC();