1// Copyright 2015 the V8 project authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5// Flags: --allow-natives-syntax
6
7var DOUBLE_ZERO = %AllocateHeapNumber();
8var SMI_ZERO = 0;
9var MINUS_ZERO = -0.0;
10
11function max1(a, b) {
12  a = +a;
13  b = +b;
14  return +(a < b ? b : a);
15}
16
17function max2(a, b) {
18  a = +a;
19  b = +b;
20  return a < b ? b : a;
21}
22
23for (f of [max1, max2]) {
24  for (var i = 0; i < 5; i++) {
25    assertEquals(4, f(3, 4));
26    assertEquals(4, f(4, 3));
27    assertEquals(4.3, f(3.3, 4.3));
28    assertEquals(4.4, f(4.4, 3.4));
29
30    assertEquals(Infinity, 1 / f(SMI_ZERO, MINUS_ZERO));
31    assertEquals(Infinity, 1 / f(DOUBLE_ZERO, MINUS_ZERO));
32    assertEquals(-Infinity, 1 / f(MINUS_ZERO, SMI_ZERO));
33    assertEquals(-Infinity, 1 / f(MINUS_ZERO, DOUBLE_ZERO));
34
35    assertEquals(NaN, f(NaN, NaN));
36    assertEquals(3, f(3, NaN));
37    assertEquals(NaN, f(NaN, 3));
38  }
39}
40
41function max3(a, b) {
42  a = +a;
43  b = +b;
44  return +(a > b ? a : b);
45}
46
47function max4(a, b) {
48  a = +a;
49  b = +b;
50  return a > b ? a : b;
51}
52
53for (f of [max3, max4]) {
54  for (var i = 0; i < 5; i++) {
55    assertEquals(4, f(3, 4));
56    assertEquals(4, f(4, 3));
57    assertEquals(4.3, f(3.3, 4.3));
58    assertEquals(4.4, f(4.4, 3.4));
59
60    assertEquals(-Infinity, 1 / f(SMI_ZERO, MINUS_ZERO));
61    assertEquals(-Infinity, 1 / f(DOUBLE_ZERO, MINUS_ZERO));
62    assertEquals(Infinity, 1 / f(MINUS_ZERO, SMI_ZERO));
63    assertEquals(Infinity, 1 / f(MINUS_ZERO, DOUBLE_ZERO));
64
65    assertEquals(NaN, f(NaN, NaN));
66    assertEquals(NaN, f(3, NaN));
67    assertEquals(3, f(NaN, 3));
68  }
69}
70