Update mips infrastructure files.

src/mips/frames-mips.cc

 // Copyright 2011 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 20 matching lines @@
 #if defined(V8_TARGET_ARCH_MIPS)
 
 #include "frames-inl.h"
 #include "mips/assembler-mips-inl.h"
 
 namespace v8 {
 namespace internal {
 
 
 Address ExitFrame::ComputeStackPointer(Address fp) {
-  UNIMPLEMENTED_MIPS();
-  return fp;
+  Address marker = Memory::Address_at(fp + ExitFrameConstants::kMarkerOffset);
+  Address sp = fp + ExitFrameConstants::kSPOffset;
+  if (marker == NULL) {
+    sp -= FPURegister::kNumRegisters * kDoubleSize + 2 * kPointerSize;
+  }
+  return sp;
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS