Add mips64 port.

src/mips64/lithium-mips64.h

Index: src/mips64/lithium-mips64.h
diff --git a/src/mips/lithium-mips.h b/src/mips64/lithium-mips64.h
similarity index 99%
copy from src/mips/lithium-mips.h
copy to src/mips64/lithium-mips64.h
index 6964fc5904f4dced91fd5eed41a99ef00aee158f..1c735bf4fb8ca5a2788aacb64a84184807c9e487 100644
--- a/src/mips/lithium-mips.h
+++ b/src/mips64/lithium-mips64.h
@@ -122,7 +122,6 @@ class LCodeGen;
   V(MulI)                                       \
   V(MultiplyAddD)                               \
   V(NumberTagD)                                 \
-  V(NumberTagI)                                 \
   V(NumberTagU)                                 \
   V(NumberUntagD)                               \
   V(OsrEntry)                                   \
@@ -1844,6 +1843,7 @@ class LCallWithDescriptor V8_FINAL : public LTemplateResultInstruction<1> {
 };
 
 
+
 class LInvokeFunction V8_FINAL : public LTemplateInstruction<1, 2, 0> {
  public:
   LInvokeFunction(LOperand* context, LOperand* function) {
@@ -1963,22 +1963,6 @@ class LUint32ToDouble V8_FINAL : public LTemplateInstruction<1, 1, 0> {
 };
 
 
-class LNumberTagI V8_FINAL : public LTemplateInstruction<1, 1, 2> {
- public:
-  LNumberTagI(LOperand* value, LOperand* temp1, LOperand* temp2) {
-    inputs_[0] = value;
-    temps_[0] = temp1;
-    temps_[1] = temp2;
-  }
-
-  LOperand* value() { return inputs_[0]; }
-  LOperand* temp1() { return temps_[0]; }
-  LOperand* temp2() { return temps_[1]; }
-
-  DECLARE_CONCRETE_INSTRUCTION(NumberTagI, "number-tag-i")
-};
-
-
 class LNumberTagU V8_FINAL : public LTemplateInstruction<1, 1, 2> {
  public:
   LNumberTagU(LOperand* value, LOperand* temp1, LOperand* temp2) {