Implement Math.ceil via Math.floor.

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 7683 matching lines @@
     int multiplier = (x < 0) ? -1 : 1;
     if (y < 0) multiplier *= 3;
     result = multiplier * kPiDividedBy4;
   } else {
     result = atan2(x, y);
   }
   return isolate->heap()->AllocateHeapNumber(result);
 }
 
 
-RUNTIME_FUNCTION(MaybeObject*, Runtime_Math_ceil) {
-  SealHandleScope shs(isolate);
-  ASSERT(args.length() == 1);
-  isolate->counters()->math_ceil()->Increment();
-
-  CONVERT_DOUBLE_ARG_CHECKED(x, 0);
-  return isolate->heap()->NumberFromDouble(ceiling(x));
-}
-
-
 RUNTIME_FUNCTION(MaybeObject*, Runtime_Math_cos) {
   SealHandleScope shs(isolate);
   ASSERT(args.length() == 1);
   isolate->counters()->math_cos()->Increment();
 
   CONVERT_DOUBLE_ARG_CHECKED(x, 0);
   return isolate->transcendental_cache()->Get(TranscendentalCache::COS, x);
 }
 
 
@@ skipping 7183 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