asm.js. Adds support for clz32 in asm.js.

test/mjsunit/wasm/asm-wasm-stdlib.js

 // Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Flags: --expose-wasm
 
 (function TestStdlibConstants() {
   function Module(stdlib) {
     "use asm";
 
@@ skipping 32 matching lines @@
   assertEquals(1, m.caller());
   assertTrue(isNaN(m.nanCheck()));
 })();
 
 
 (function TestStdlibFunctionsInside() {
   function Module(stdlib) {
     "use asm";
 
     var StdlibMathCeil = stdlib.Math.ceil;
+    var StdlibMathClz32 = stdlib.Math.clz32;
     var StdlibMathFloor = stdlib.Math.floor;
     var StdlibMathSqrt = stdlib.Math.sqrt;
     var StdlibMathAbs = stdlib.Math.abs;
     var StdlibMathMin = stdlib.Math.min;
     var StdlibMathMax = stdlib.Math.max;
 
     var StdlibMathAcos = stdlib.Math.acos;
     var StdlibMathAsin = stdlib.Math.asin;
     var StdlibMathAtan = stdlib.Math.atan;
     var StdlibMathCos = stdlib.Math.cos;
@@ skipping 36 matching lines @@
           != fround(1236.4)) return 0;
 
       if (!(deltaEqual(+StdlibMathAcos(0.1), 1.4706289056333368)|0)) return 0;
       if (!(deltaEqual(+StdlibMathAsin(0.2), 0.2013579207903308)|0)) return 0;
       if (!(deltaEqual(+StdlibMathAtan(0.2), 0.19739555984988078)|0)) return 0;
       if (!(deltaEqual(+StdlibMathCos(0.2), 0.9800665778412416)|0)) return 0;
       if (!(deltaEqual(+StdlibMathSin(0.2), 0.19866933079506122)|0)) return 0;
       if (!(deltaEqual(+StdlibMathTan(0.2), 0.20271003550867250)|0)) return 0;
       if (!(deltaEqual(+StdlibMathExp(0.2), 1.2214027581601699)|0)) return 0;
       if (!(deltaEqual(+StdlibMathLog(0.2), -1.6094379124341003)|0)) return 0;
+      if ((StdlibMathClz32(134217728)|0) != 4) return 0;
 
       if ((StdlibMathImul(6, 7)|0) != 42) return 0;
       if (!(deltaEqual(+StdlibMathAtan2(6.0, 7.0), 0.7086262721276703)|0))
         return 0;
       if (+StdlibMathPow(6.0, 7.0) != 279936.0) return 0;
 
       return 1;
     }
 
     return {caller:caller};
@@ skipping 231 matching lines @@
           if (!compare(expected, actual)) {
             print(expected + ' !== ' + actual + ' for ' + name +
                   ' with input ' + val0 + ' ' + val1);
             assertTrue(false);
           }
         }
       }
     }
   }
 })();