1 // Copyright 2014 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 var stdlib = this; 6 var buffer = new ArrayBuffer(64 * 1024); 7 var foreign = {} 8 9 10 var sext8 = (function Module(stdlib, foreign, heap) { 11 "use asm"; 12 function sext8(i) { 13 i = i|0; 14 i = i << 24 >> 24; 15 return i|0; 16 } 17 return { sext8: sext8 }; 18 })(stdlib, foreign, buffer).sext8; 19 20 assertEquals(-128, sext8(128)); 21 assertEquals(-1, sext8(-1)); 22 assertEquals(-1, sext8(255)); 23 assertEquals(0, sext8(0)); 24 assertEquals(0, sext8(256)); 25 assertEquals(42, sext8(42)); 26 assertEquals(127, sext8(127)); 27 28 29 var sext16 = (function Module(stdlib, foreign, heap) { 30 "use asm"; 31 function sext16(i) { 32 i = i|0; 33 i = i << 16 >> 16; 34 return i|0; 35 } 36 return { sext16: sext16 }; 37 })(stdlib, foreign, buffer).sext16; 38 39 assertEquals(-32768, sext16(32768)); 40 assertEquals(-1, sext16(-1)); 41 assertEquals(-1, sext16(65535)); 42 assertEquals(0, sext16(0)); 43 assertEquals(0, sext16(65536)); 44 assertEquals(128, sext16(128)); 45 assertEquals(32767, sext16(32767)); 46
