| 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(); |