v8/test/mjsunit/asm/word32and.js

// Copyright 2014 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

var stdlib = {};
var foreign = {};
var heap = new ArrayBuffer(64 * 1024);

function Word32And(rhs) {
  var name = "and_0x" + Number(rhs).toString(16);
  var m = eval(
      'function Module(stdlib, foreign, heap) {\n' +
      ' "use asm";\n' +
      ' function ' + name + '(lhs) {\n' +
      '  lhs = lhs | 0;\n' +
      '  return (lhs & 0x' + Number(rhs).toString(16) + ') | 0;\n' +
      ' }\n' +
      ' return { f: ' + name + '}\n' +
      '}; Module');
  return m(stdlib, foreign, heap).f;
}

var masks = [0xffffffff, 0xf0f0f0f0, 0x80ffffff, 0x07f77f0f, 0xdeadbeef,
             0x0fffff00, 0x0ff0, 0xff, 0x00];
for (var i in masks) {
  var rhs = masks[i];
  var and = Word32And(rhs);
  for (var lhs = -2147483648; lhs < 2147483648; lhs += 3999773) {
    assertEquals(lhs & rhs, and(lhs));
  }
}