src/v8/test/mjsunit/asm/switch.js

// Copyright 2015 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 = this;
var foreign = {};
var heap = new ArrayBuffer(64 * 1024);


var switch1 = (function(stdlib, foreign, heap) {
  "use asm";
  function switch1(i) {
    i = i|0;
    switch (i | 0) {
      case 0: return 1;
      case 1: return 2;
      default: return i|0;
    }
    return i | 0;
  }
  return { switch1: switch1 };
})(stdlib, foreign, heap).switch1;

assertEquals(1, switch1(0));
assertEquals(2, switch1(1));
for (var i = -2147483648; i < 2147483648; i += 3999773) {
  assertEquals(i, switch1(i));
}


var switch2 = (function(stdlib, foreign, heap) {
  "use asm";
  function switch2(i) {
    i = i|0;
    var j = 0;
    switch (i | 0) {
      case 0: j = 1; break;
      case 1: j = 2; break;
      case 2: j = 3; break;
      default: j = i|0; break;
    }
    return j|0;
  }
  return { switch2: switch2 };
})(stdlib, foreign, heap).switch2;

assertEquals(1, switch2(0));
assertEquals(2, switch2(1));
assertEquals(3, switch2(2));
for (var i = -2147483648; i < 2147483648; i += 3999773) {
  assertEquals(i, switch2(i));
}


var switch3 = (function(stdlib, foreign, heap) {
  "use asm";
  function switch3(i) {
    i = i|0;
    var j = 0;
    switch (i | 0) {
      case 0:
      case 1: j = 1; break;
      case 2:
      case 3: j = 2; break;
      case 4:
      case 5: j = 3; break;
      default: j = 0; break;
    }
    return j|0;
  }
  return { switch3: switch3 };
})(stdlib, foreign, heap).switch3;

assertEquals(1, switch3(0));
assertEquals(1, switch3(1));
assertEquals(2, switch3(2));
assertEquals(2, switch3(3));
assertEquals(3, switch3(4));
assertEquals(3, switch3(5));
for (var i = -2147483648; i < 2147483648; i += 3999773) {
  assertEquals(0, switch3(i));
}


var switch4 = (function(stdlib, foreign, heap) {
  "use asm";
  function switch4(i) {
    i = i|0;
    switch (i | 0) {
      case -1:
      case 1:
        return 0;

      case -2:
      case 2:
        return 1;

      case -3:
      case 3:
        return 2;

      case -8:
      case 8:
        return 3;

      default:
        return 4;
    }
    return 0;  // needed for validation
  }
  return { switch4: switch4 };
})(stdlib, foreign, heap).switch4;

assertEquals(4, switch4(0));
assertEquals(0, switch4(-1));
assertEquals(0, switch4(1));
assertEquals(1, switch4(-2));
assertEquals(1, switch4(2));
assertEquals(3, switch4(-8));
assertEquals(3, switch4(8));
assertEquals(4, switch4(-123456789));
assertEquals(4, switch4(123456789));