Implement support for Math.imul in Crankshaft.

src/runtime.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 6253 matching lines @@
 
   CONVERT_DOUBLE_ARG_CHECKED(x, 0);
   CONVERT_DOUBLE_ARG_CHECKED(y, 1);
 
   x = modulo(x, y);
   // NumberFromDouble may return a Smi instead of a Number object
   return isolate->heap()->NumberFromDouble(x);
 }
 
 
+RUNTIME_FUNCTION(MaybeObject*, Runtime_NumberImul) {
+  NoHandleAllocation ha(isolate);
+  ASSERT(args.length() == 2);
+
+  CONVERT_NUMBER_CHECKED(int32_t, x, Int32, args[0]);
+  CONVERT_NUMBER_CHECKED(int32_t, y, Int32, args[1]);
+  return isolate->heap()->NumberFromInt32(x * y);
+}
+
+
 RUNTIME_FUNCTION(MaybeObject*, Runtime_StringAdd) {
   NoHandleAllocation ha(isolate);
   ASSERT(args.length() == 2);
   CONVERT_ARG_CHECKED(String, str1, 0);
   CONVERT_ARG_CHECKED(String, str2, 1);
   isolate->counters()->string_add_runtime()->Increment();
   return isolate->heap()->AllocateConsString(str1, str2);
 }
 
 
@@ skipping 7066 matching lines @@
     // Handle last resort GC and make sure to allow future allocations
     // to grow the heap without causing GCs (if possible).
     isolate->counters()->gc_last_resort_from_js()->Increment();
     isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags,
                                        "Runtime::PerformGC");
   }
 }
 
 
 } }  // namespace v8::internal