Added precision mode to fast-dtoa.

src/dtoa.cc

 // Copyright 2010 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 47 matching lines @@
   }
 
   if (mode == DTOA_PRECISION && requested_digits == 0) {
     buffer[0] = '\0';
     *length = 0;
     return true;
   }
 
   switch (mode) {
     case DTOA_SHORTEST:
-      return FastDtoa(v, buffer, length, point);
+      return FastDtoa(v, FAST_DTOA_SHORTEST, 0, buffer, length, point);
     case DTOA_FIXED:
       return FastFixedDtoa(v, requested_digits, buffer, length, point);
-    default:
-      break;
+    case DTOA_PRECISION:
+      return FastDtoa(v, FAST_DTOA_PRECISION, requested_digits,
+                      buffer, length, point);
   }
   return false;
 }
 
 } }  // namespace v8::internal