Create specialized code stubs for PixelArray loads.

src/arm/code-stubs-arm.h

 // 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 550 matching lines @@
   virtual ~RegExpCEntryStub() {}
   void Generate(MacroAssembler* masm);
 
  private:
   Major MajorKey() { return RegExpCEntry; }
   int MinorKey() { return 0; }
   const char* GetName() { return "RegExpCEntryStub"; }
 };
 
 
+// Generate code the to load an element from a pixel array. The receiver is
+// assumed to not be a smi and to have elements, the caller must guarantee this
+// precondition. If the receiver does not have elements that are pixel arrays,
+// the generated code jumps to not_pixel_array. If key is not a smi, then the
+// generated code branches to key_not_smi. Callers can specify NULL for
+// key_not_smi to signal that a smi check has already been performed on key so
+// that the smi check is not generated . If key is not a valid index within the
+// bounds of the pixel array, the generated code jumps to out_of_range.
+void GenerateFastPixelArrayLoad(MacroAssembler* masm,
+                                Register receiver,
+                                Register key,
+                                Register elements_map,
+                                Register elements,
+                                Register scratch1,
+                                Register scratch2,
+                                Register result,
+                                Label* not_pixel_array,
+                                Label* key_not_smi,
+                                Label* out_of_range);
+
+
 } }  // namespace v8::internal
 
 #endif  // V8_ARM_CODE_STUBS_ARM_H_