IA32: Native access to TranscendentalCache for sin/cos.

src/heap.h

Index: src/heap.h
diff --git a/src/heap.h b/src/heap.h
index 22ab875bb141de0dedffe7ea401e3d8f974c9837..1d5f26a219dc4bdbc5310f4ee0438658942e3299 100644
--- a/src/heap.h
+++ b/src/heap.h
@@ -1610,6 +1610,7 @@ class TranscendentalCache {
     if (e.in[0] == c.integers[0] &&
         e.in[1] == c.integers[1]) {
       ASSERT(e.output != NULL);
+      Counters::transcendental_cache_hit.Increment();
       return e.output;
     }
     double answer = Calculate(input);
@@ -1619,6 +1620,7 @@ class TranscendentalCache {
       elements_[hash].in[1] = c.integers[1];
       elements_[hash].output = heap_number;
     }
+    Counters::transcendental_cache_miss.Increment();
     return heap_number;
   }
 
@@ -1659,6 +1661,17 @@ class TranscendentalCache {
     hash ^= hash >> 8;
     return (hash & (kCacheSize - 1));
   }
+
+  static Address cache_array_address() {
+    // Used to create an external reference.
+    return reinterpret_cast<Address>(caches_);
+  }
+
+  // Allow access to the caches_ array as an ExternalReference.
+  friend class ExternalReference;
+  // Inline implementation of the caching.
+  friend class TranscendentalCacheStub;
+
   static TranscendentalCache* caches_[kNumberOfCaches];
   Element elements_[kCacheSize];
   Type type_;