Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 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 | |
| 7 | function 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 compareExchange = stdlib.Atomics.compareExchange; |
| 16 | var fround = stdlib.Math.fround; |
| 17 | |
| 18 | function compareExchangei8(i, o, n) { |
| 19 | i = i | 0; |
| 20 | o = o | 0; |
| 21 | n = n | 0; |
| 22 | return compareExchange(MEM8, i, o, n)|0; |
| 23 | } |
| 24 | |
| 25 | function compareExchangei16(i, o, n) { |
| 26 | i = i | 0; |
| 27 | o = o | 0; |
| 28 | n = n | 0; |
| 29 | return compareExchange(MEM16, i, o, n)|0; |
| 30 | } |
| 31 | |
| 32 | function compareExchangei32(i, o, n) { |
| 33 | i = i | 0; |
| 34 | o = o | 0; |
| 35 | n = n | 0; |
| 36 | return compareExchange(MEM32, i, o, n)|0; |
| 37 | } |
| 38 | |
| 39 | function compareExchangeu8(i, o, n) { |
| 40 | i = i | 0; |
| 41 | o = o >>> 0; |
| 42 | n = n >>> 0; |
| 43 | return compareExchange(MEMU8, i, o, n)>>>0; |
| 44 | } |
| 45 | |
| 46 | function compareExchangeu16(i, o, n) { |
| 47 | i = i | 0; |
| 48 | o = o >>> 0; |
| 49 | n = n >>> 0; |
| 50 | return compareExchange(MEMU16, i, o, n)>>>0; |
| 51 | } |
| 52 | |
| 53 | function compareExchangeu32(i, o, n) { |
| 54 | i = i | 0; |
| 55 | o = o >>> 0; |
| 56 | n = n >>> 0; |
| 57 | return compareExchange(MEMU32, i, o, n)>>>0; |
| 58 | } |
| 59 | |
| 60 | return { |
| 61 | compareExchangei8: compareExchangei8, |
| 62 | compareExchangei16: compareExchangei16, |
| 63 | compareExchangei32: compareExchangei32, |
| 64 | compareExchangeu8: compareExchangeu8, |
| 65 | compareExchangeu16: compareExchangeu16, |
| 66 | compareExchangeu32: compareExchangeu32, |
| 67 | }; |
| 68 | } |
| 69 | |
| 70 | function clearArray() { |
| 71 | var ui8 = new Uint8Array(sab); |
| 72 | for (var i = 0; i < sab.byteLength; ++i) { |
| 73 | ui8[i] = 0; |
| 74 | } |
| 75 | } |
| 76 | |
| 77 | function testElementType(taConstr, f, oobValue, offset) { |
| 78 | clearArray(); |
| 79 | |
| 80 | var ta = new taConstr(sab, offset); |
| 81 | var name = Object.prototype.toString.call(ta); |
| 82 | assertEquals(0, ta[0]); |
| 83 | assertEquals(0, f(0, 0, 50), name); |
| 84 | assertEquals(50, ta[0]); |
| 85 | // Value is not equal to 0, so compareExchange won't store 100 |
| 86 | assertEquals(50, f(0, 0, 100), name); |
| 87 | assertEquals(50, ta[0]); |
| 88 | // out of bounds |
| 89 | assertEquals(oobValue, f(-1, 0, 0), name); |
| 90 | assertEquals(oobValue, f(ta.length, 0, 0), name); |
| 91 | } |
| 92 | |
| 93 | function testElement(m, offset) { |
| 94 | testElementType(Int8Array, m.compareExchangei8, 0, offset); |
| 95 | testElementType(Int16Array, m.compareExchangei16, 0, offset); |
| 96 | testElementType(Int32Array, m.compareExchangei32, 0, offset); |
| 97 | testElementType(Uint8Array, m.compareExchangeu8, 0, offset); |
| 98 | testElementType(Uint16Array, m.compareExchangeu16, 0, offset); |
| 99 | testElementType(Uint32Array, m.compareExchangeu32, 0, offset); |
| 100 | } |
| 101 | |
| 102 | var offset = 0; |
| 103 | var sab = new SharedArrayBuffer(16); |
| 104 | var m1 = Module(this, {}, sab, offset); |
| 105 | testElement(m1, offset); |
| 106 | |
| 107 | offset = 32; |
| 108 | sab = new SharedArrayBuffer(64); |
| 109 | var m2 = Module(this, {}, sab, offset); |
| 110 | testElement(m2, offset); |