• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
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: --harmony-sharedarraybuffer
6
7function Module(stdlib, foreign, heap, offset) {
8  "use asm";
9  var MEM8 = new stdlib.Int8Array(heap, offset);
10  var MEM16 = new stdlib.Int16Array(heap, offset);
11  var MEM32 = new stdlib.Int32Array(heap, offset);
12  var MEMU8 = new stdlib.Uint8Array(heap, offset);
13  var MEMU16 = new stdlib.Uint16Array(heap, offset);
14  var MEMU32 = new stdlib.Uint32Array(heap, offset);
15  var sub = stdlib.Atomics.sub;
16  var fround = stdlib.Math.fround;
17
18  function subi8(i, x) {
19    i = i | 0;
20    x = x | 0;
21    return sub(MEM8, i, x)|0;
22  }
23
24  function subi16(i, x) {
25    i = i | 0;
26    x = x | 0;
27    return sub(MEM16, i, x)|0;
28  }
29
30  function subi32(i, x) {
31    i = i | 0;
32    x = x | 0;
33    return sub(MEM32, i, x)|0;
34  }
35
36  function subu8(i, x) {
37    i = i | 0;
38    x = x >>> 0;
39    return sub(MEMU8, i, x)>>>0;
40  }
41
42  function subu16(i, x) {
43    i = i | 0;
44    x = x >>> 0;
45    return sub(MEMU16, i, x)>>>0;
46  }
47
48  function subu32(i, x) {
49    i = i | 0;
50    x = x >>> 0;
51    return sub(MEMU32, i, x)>>>0;
52  }
53
54  return {
55    subi8: subi8,
56    subi16: subi16,
57    subi32: subi32,
58    subu8: subu8,
59    subu16: subu16,
60    subu32: subu32,
61  };
62}
63
64function clearArray() {
65  var ui8 = new Uint8Array(sab);
66  for (var i = 0; i < sab.byteLength; ++i) {
67    ui8[i] = 0;
68  }
69}
70
71function testElementType(taConstr, f, offset) {
72  clearArray();
73
74  var ta = new taConstr(sab, offset);
75  var name = Object.prototype.toString.call(ta);
76  ta[0] = 30;
77  assertEquals(30, f(0, 10), name);
78  assertEquals(20, ta[0]);
79  assertEquals(20, f(0, 10), name);
80  assertEquals(10, ta[0]);
81  // out of bounds
82  assertEquals(0, f(-1, 0), name);
83  assertEquals(0, f(ta.length, 0), name);
84}
85
86function testElement(m, offset) {
87  testElementType(Int8Array, m.subi8, offset);
88  testElementType(Int16Array, m.subi16, offset);
89  testElementType(Int32Array, m.subi32, offset);
90  testElementType(Uint8Array, m.subu8, offset);
91  testElementType(Uint16Array, m.subu16, offset);
92  testElementType(Uint32Array, m.subu32, offset);
93}
94
95var offset = 0;
96var sab = new SharedArrayBuffer(16);
97var m1 = Module(this, {}, sab, offset);
98testElement(m1, offset);
99
100offset = 32;
101sab = new SharedArrayBuffer(64);
102var m2 = Module(this, {}, sab, offset);
103testElement(m2, offset);
104