[wasm] [asm.js] Fix various asm.js issues.

test/mjsunit/wasm/asm-wasm-i32.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: --validate-asm --allow-natives-syntax
 
 function WrapInAsmModule(func) {
   function MODULE_NAME(stdlib) {
     "use asm";
     var imul = stdlib.Math.imul;
@@ skipping 162 matching lines @@
   a = a | 0;
   b = b | 0;
   return Math_max(a | 0, b | 0) | 0;
 }
 
 function i32_abs(a) {
   a = a | 0;
   return Math_abs(a | 0) | 0;
 }
 
+function i32_neg(a) {
+  a = a | 0;
+  return (-a) | 0;
+}
+
+function i32_invert(a) {
+  a = a | 0;
+  return (~a) | 0;
+}
+
 var inputs = [
   0, 1, 2, 3, 4,
   10, 20, 30, 31, 32, 33, 100, 2000,
   30000, 400000, 5000000,
   100000000, 2000000000,
   2147483646,
   2147483647,
   2147483648,
   2147483649,
   0x273a798e, 0x187937a3, 0xece3af83, 0x5495a16b, 0x0b668ecc, 0x11223344,
@@ skipping 26 matching lines @@
   i32_shr,
   i32_sar,
   i32_eq,
   i32_ne,
   i32_lt,
   i32_lteq,
   i32_gt,
   i32_gteq,
   i32_min,
   i32_max,
-  i32_abs
+  i32_abs,
+  i32_neg,
+  i32_invert,

[aseemgarg, 2016/09/28 06:23:39]

is the last comma allowed?

[bradn, 2016/09/28 16:33:53]

Yep. Changed to match the style in the other tests with this structure.

 ];
 
 (function () {
   for (func of funcs) {
     RunAsmJsTest(WrapInAsmModule(func), function (module) {
       if (func.length == 1) {
         for (a of inputs) {
           assertEquals(func(a), module.main(a));
         }
       } else {
         for (a of inputs) {
           for (b of inputs) {
             assertEquals(func(a, b), module.main(a, b));
           }
         }
       }
     });
   }
 
 })();