Update mips infrastructure files.

src/mips/cpu-mips.cc

-// Copyright 2010 the V8 project authors. All rights reserved.
+// 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
 //       with the distribution.
@@ skipping 29 matching lines @@
 #include "cpu.h"
 #include "macro-assembler.h"
 
 #include "simulator.h"  // For cache flushing.
 
 namespace v8 {
 namespace internal {
 
 
 void CPU::Setup() {
-  CpuFeatures* cpu_features = Isolate::Current()->cpu_features();
-  cpu_features->Probe(true);
-  if (!cpu_features->IsSupported(FPU) || Serializer::enabled()) {
-    V8::DisableCrankshaft();
-  }
+  CpuFeatures::Probe();
+}
+
+
+bool CPU::SupportsCrankshaft() {
+  return CpuFeatures::IsSupported(FPU);
 }
 
 
 void CPU::FlushICache(void* start, size_t size) {
+  // Nothing to do, flushing no instructions.
+  if (size == 0) {
+    return;
+  }
+
 #if !defined (USE_SIMULATOR)
   int res;
 
-  // See http://www.linux-mips.org/wiki/Cacheflush_Syscall
+  // See http://www.linux-mips.org/wiki/Cacheflush_Syscall.
   res = syscall(__NR_cacheflush, start, size, ICACHE);
 
   if (res) {
     V8_Fatal(__FILE__, __LINE__, "Failed to flush the instruction cache");
   }
 
 #else  // USE_SIMULATOR.
   // Not generating mips instructions for C-code. This means that we are
   // building a mips emulator based target.  We should notify the simulator
   // that the Icache was flushed.
   // None of this code ends up in the snapshot so there are no issues
   // around whether or not to generate the code when building snapshots.
   Simulator::FlushICache(Isolate::Current()->simulator_i_cache(), start, size);
 #endif  // USE_SIMULATOR.
 }
 
 
 void CPU::DebugBreak() {
 #ifdef __mips
   asm volatile("break");
 #endif  // #ifdef __mips
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS