value-convertion.js (944B)
1 // Copyright (C) 2016 The V8 Project authors. All rights reserved. 2 // This code is governed by the BSD license found in the LICENSE file. 3 4 /*--- 5 esid: sec-math.fround 6 description: > 7 Convert to binary32 format and than to binary64 format 8 info: | 9 Math.fround ( x ) 10 11 [...] 12 3. Let x32 be the result of converting x to a value in IEEE 754-2008 binary32 13 format using roundTiesToEven. 14 4. Let x64 be the result of converting x32 to a value in IEEE 754-2008 15 binary64 format. 16 5. Return the ECMAScript Number value corresponding to x64. 17 ---*/ 18 19 assert.sameValue(Math.fround(4294967295), 4294967296, "2**32-1"); 20 assert.sameValue(Math.fround(4294967296), 4294967296, "2**32"); 21 assert.sameValue(Math.fround(4294967297), 4294967296, "2**32+1"); 22 23 assert.sameValue(Math.fround(0.1), 0.10000000149011612, "0.1"); 24 assert.sameValue(Math.fround(0.2), 0.20000000298023224, "0.2"); 25 assert.sameValue(Math.fround(0.5), 0.5, "0.5"); 26 27 reportCompare(0, 0);