[interpreter] Add Interpreter{Entry,Exit}Trampoline builtins.

src/compiler/mips/linkage-mips.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/assembler.h"
 #include "src/code-stubs.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/linkage-impl.h"
 #include "src/zone.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
 struct MipsLinkageHelperTraits {
   static Register ReturnValueReg() { return v0; }
   static Register ReturnValue2Reg() { return v1; }
   static Register JSCallFunctionReg() { return a1; }
   static Register ContextReg() { return cp; }
-  static Register InterpreterBytecodeOffsetReg() { return t4; }
-  static Register InterpreterBytecodeArrayReg() { return t5; }
-  static Register InterpreterDispatchTableReg() { return t6; }
+  static Register InterpreterBytecodeOffsetReg() {
+    return kInterpreterBytecodeOffsetRegister;
+  }
+  static Register InterpreterBytecodeArrayReg() {
+    return kInterpreterBytecodeArrayRegister;
+  }
+  static Register InterpreterDispatchTableReg() {
+    return kInterpreterDispatchTableRegister;
+  }
   static Register RuntimeCallFunctionReg() { return a1; }
   static Register RuntimeCallArgCountReg() { return a0; }
   static RegList CCalleeSaveRegisters() {
     return s0.bit() | s1.bit() | s2.bit() | s3.bit() | s4.bit() | s5.bit() |
            s6.bit() | s7.bit();
   }
   static RegList CCalleeSaveFPRegisters() {
     return f20.bit() | f22.bit() | f24.bit() | f26.bit() | f28.bit() |
            f30.bit();
   }
@@ skipping 39 matching lines @@
 }
 
 
 CallDescriptor* Linkage::GetInterpreterDispatchDescriptor(Zone* zone) {
   return LH::GetInterpreterDispatchDescriptor(zone);
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8