JezK

Edit File: bitops-info.js

// Copyright 2010 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 non_int32() {
  return 2600822924;  // It's not a signed Int32.
}

function hidden_smi() {
  return 46512102;  // It's a Smi
}

function hidden_int32() {
  return 1600822924;  // It's a signed Int32.
}

function f() {
  var x = non_int32();  // Not a constant.
  var y = hidden_smi();  // Not a constant.
  var z = hidden_int32();
  assertEquals(46512102 & 2600822924, 46512102 & x, "1");
  assertEquals(1600822924 & 2600822924, 1600822924 & x, "2");
  assertEquals(2600822924 & 2600822924, 2600822924 & x, "3");
  assertEquals(46512102 & 46512102, 46512102 & y, "4");
  assertEquals(1600822924 & 46512102, 1600822924 & y, "5");
  assertEquals(2600822924 & 46512102, 2600822924 & y, "6");
  assertEquals(46512102 & 1600822924, 46512102 & z, "7");
  assertEquals(1600822924 & 1600822924, 1600822924 & z, "8");
  assertEquals(2600822924 & 1600822924, 2600822924 & z, "9");
  assertEquals(46512102 & 2600822924, y & x, "10");
  assertEquals(1600822924 & 2600822924, z & x, "11");

assertEquals(46512102 & 2600822924, x & 46512102, "1rev");
  assertEquals(1600822924 & 2600822924, x & 1600822924, "2rev");
  assertEquals(2600822924 & 2600822924, x & 2600822924, "3rev");
  assertEquals(46512102 & 46512102, y & 46512102, "4rev");
  assertEquals(1600822924 & 46512102, y & 1600822924, "5rev");
  assertEquals(2600822924 & 46512102, y & 2600822924, "6rev");
  assertEquals(46512102 & 1600822924, z & 46512102, "7rev");
  assertEquals(1600822924 & 1600822924, z & 1600822924, "8rev");
  assertEquals(2600822924 & 1600822924, z & 2600822924, "9rev");
  assertEquals(46512102 & 2600822924, x & y, "10rev");
  assertEquals(1600822924 & 2600822924, x & z, "11rev");

assertEquals((46512102 & -0x20123456) | 1, (y & -0x20123456) | 1, "12");
  assertEquals((1600822924 & -0x20123456) | 1, (z & -0x20123456) | 1, "13");
  assertEquals((2600822924 & -0x20123456) | 1, (x & -0x20123456) | 1, "14");
  assertEquals((46512102 & -0x20123456) | 1, (-0x20123456 & y) | 1, "12rev");
  assertEquals((1600822924 & -0x20123456) | 1, (-0x20123456 & z) | 1, "13rev");
  assertEquals((2600822924 & -0x20123456) | 1, (-0x20123456 & x) | 1, "14rev");

assertEquals(2600822924 & 2600822924, x & x, "xx");
  assertEquals(y, y & y, "yy");
  assertEquals(z, z & z, "zz");
}

for (var i = 0; i < 5; i++) {
  f();
}

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