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 exchange = stdlib.Atomics.exchange; 16 var fround = stdlib.Math.fround; 17 18 function exchangei8(i, x) { 19 i = i | 0; 20 x = x | 0; 21 return exchange(MEM8, i, x)|0; 22 } 23 24 function exchangei16(i, x) { 25 i = i | 0; 26 x = x | 0; 27 return exchange(MEM16, i, x)|0; 28 } 29 30 function exchangei32(i, x) { 31 i = i | 0; 32 x = x | 0; 33 return exchange(MEM32, i, x)|0; 34 } 35 36 function exchangeu8(i, x) { 37 i = i | 0; 38 x = x >>> 0; 39 return exchange(MEMU8, i, x)>>>0; 40 } 41 42 function exchangeu16(i, x) { 43 i = i | 0; 44 x = x >>> 0; 45 return exchange(MEMU16, i, x)>>>0; 46 } 47 48 function exchangeu32(i, x) { 49 i = i | 0; 50 x = x >>> 0; 51 return exchange(MEMU32, i, x)>>>0; 52 } 53 54 return { 55 exchangei8: exchangei8, 56 exchangei16: exchangei16, 57 exchangei32: exchangei32, 58 exchangeu8: exchangeu8, 59 exchangeu16: exchangeu16, 60 exchangeu32: exchangeu32, 61 }; 62} 63 64var sab = new SharedArrayBuffer(16); 65var m = Module(this, {}, sab); 66 67function clearArray() { 68 var ui8 = new Uint8Array(sab); 69 for (var i = 0; i < sab.byteLength; ++i) { 70 ui8[i] = 0; 71 } 72} 73 74function testElementType(taConstr, f, offset) { 75 clearArray(); 76 77 var ta = new taConstr(sab, offset); 78 var name = Object.prototype.toString.call(ta); 79 ta[0] = 0x7f; 80 assertEquals(0x7f, f(0, 0xf), name); 81 assertEquals(0xf, ta[0]); 82 // out of bounds 83 assertThrows(function() { f(-1, 0); }); 84 assertThrows(function() { f(ta.length, 0); }); 85} 86 87function testElement(m, offset) { 88 testElementType(Int8Array, m.exchangei8, offset); 89 testElementType(Int16Array, m.exchangei16, offset); 90 testElementType(Int32Array, m.exchangei32, offset); 91 testElementType(Uint8Array, m.exchangeu8, offset); 92 testElementType(Uint16Array, m.exchangeu16, offset); 93 testElementType(Uint32Array, m.exchangeu32, offset); 94} 95 96var offset = 0; 97var sab = new SharedArrayBuffer(16); 98var m1 = Module(this, {}, sab, offset); 99testElement(m1, offset); 100 101offset = 32; 102sab = new SharedArrayBuffer(64); 103var m2 = Module(this, {}, sab, offset); 104testElement(m2, offset); 105