1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
|
function testInt8() {
var arr1 = new Int8Array(50);
var arr2 = new Uint8Array(50);
var arr3 = new Uint8ClampedArray(50);
for (var i=0; i<arr1.length; i++) {
arr1[i] = arr2[i] = arr3[i] = i * 8;
}
var res = 0;
for (var i=0; i<arr1.length; i++) {
res += arr1[i] + arr2[i] + arr3[i] + arr2[10];
}
assertEq(res, 18334);
}
testInt8();
function testInt16() {
var arr1 = new Int16Array(70);
var arr2 = new Uint16Array(70);
for (var i=0; i<arr1.length; i++) {
arr1[i] = arr2[i] = i * 1000;
}
var res = 0;
for (var i=0; i<arr1.length; i++) {
res += arr1[i] + arr2[i] + arr2[1] + arr1[3];
}
assertEq(res, 2423024);
}
testInt16();
function testInt32() {
var arr = new Int32Array(60);
arr[0] = -50;
for (var i=1; i<arr.length; i++) {
arr[i] = arr[i-1] + arr[0];
++arr[0];
}
assertEq(arr[arr.length-1], -1289);
}
testInt32();
function testUint32() {
function sum(arr) {
var res = 0;
for (var i=0; i<arr.length; i++) {
res += arr[i];
}
return res;
}
var arr = new Uint32Array(100);
for (var i=0; i<arr.length; i++) {
arr[i] = i;
}
// Compile sum() to read int32 values.
assertEq(sum(arr), 4950);
// Add a large uint32 so that the sum no longer fits in an
// int32. sum() should be recompiled to return a double.
arr[50] = 0xffffeeee;
assertEq(sum(arr), 4294967826);
}
testUint32();
function testFloat() {
var arr1 = new Float32Array(75);
var arr2 = new Float64Array(75);
arr1[0] = arr2[0] = Math.PI * 1234567.8;
for (var i=1; i<75; i++) {
arr1[i] = arr1[i-1] + arr1[0];
arr2[i] = arr2[i-1] + arr2[0];
}
assertEq(arr1[74] > 290888255, true);
assertEq(arr1[74] < 290888257, true);
assertEq(arr2[74] > 290888184, true);
assertEq(arr2[74] < 290888185, true);
}
testFloat();
function testCanonicalNaN() {
// NaN values have to be canonicalized. Otherwise, malicious scripts could
// construct arbitrary Value's (due to our NaN boxing Value representation).
var buf = new ArrayBuffer(16);
var uint32 = new Uint32Array(buf);
var f64 = new Float64Array(buf);
var f32 = new Float32Array(buf);
// Evil: write a JSVAL_TYPE_OBJECT type tag...
uint32[0] = 0xffffff87;
uint32[1] = 0xffffff87;
// Make sure this value is interpreted as a double.
for (var i=0; i<100; i++) {
assertEq(isNaN(f64[0]), true);
assertEq(isNaN(f32[0]), true);
}
}
testCanonicalNaN();
|
