Move assembler out of runtime into compiler/utils.

Other directory layout bits of clean up. There is still work to separate quick
and portable in some files (e.g. argument visitor, proxy..).

Change-Id: If8fecffda8ba5c4c47a035f0c622c538c6b58351
diff --git a/runtime/arch/mips/context_mips.h b/runtime/arch/mips/context_mips.h
new file mode 100644
index 0000000..5595f86
--- /dev/null
+++ b/runtime/arch/mips/context_mips.h
@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ART_RUNTIME_ARCH_MIPS_CONTEXT_MIPS_H_
+#define ART_RUNTIME_ARCH_MIPS_CONTEXT_MIPS_H_
+
+#include "arch/context.h"
+#include "base/logging.h"
+#include "registers_mips.h"
+
+namespace art {
+namespace mips {
+
+class MipsContext : public Context {
+ public:
+  MipsContext() {
+    Reset();
+  }
+  virtual ~MipsContext() {}
+
+  virtual void Reset();
+
+  virtual void FillCalleeSaves(const StackVisitor& fr);
+
+  virtual void SetSP(uintptr_t new_sp) {
+    SetGPR(SP, new_sp);
+  }
+
+  virtual void SetPC(uintptr_t new_pc) {
+    SetGPR(RA, new_pc);
+  }
+
+  virtual uintptr_t GetGPR(uint32_t reg) {
+    CHECK_LT(reg, static_cast<uint32_t>(kNumberOfCoreRegisters));
+    return *gprs_[reg];
+  }
+
+  virtual void SetGPR(uint32_t reg, uintptr_t value);
+  virtual void SmashCallerSaves();
+  virtual void DoLongJump();
+
+ private:
+  // Pointers to registers in the stack, initialized to NULL except for the special cases below.
+  uintptr_t* gprs_[kNumberOfCoreRegisters];
+  uint32_t* fprs_[kNumberOfFRegisters];
+  // Hold values for sp and ra (return address) if they are not located within a stack frame.
+  uintptr_t sp_, ra_;
+};
+}  // namespace mips
+}  // namespace art
+
+#endif  // ART_RUNTIME_ARCH_MIPS_CONTEXT_MIPS_H_