MIPS: Re-land Crankshaft-generated KeyedLoad stubs.

src/mips/assembler-mips.h

Index: src/mips/assembler-mips.h
diff --git a/src/mips/assembler-mips.h b/src/mips/assembler-mips.h
index 09aa371667883a90bc4c5e02e3b1461e73bf5dbc..dd3a065dcac61d53e5aee70a924d476410ca6b3b 100644
--- a/src/mips/assembler-mips.h
+++ b/src/mips/assembler-mips.h
@@ -72,20 +72,23 @@ namespace internal {
 // Core register.
 struct Register {
   static const int kNumRegisters = v8::internal::kNumRegisters;
-  static const int kNumAllocatableRegisters = 14;  // v0 through t7.
+  static const int kMaxNumAllocatableRegisters = 14;  // v0 through t7.
   static const int kSizeInBytes = 4;
+  static const int kGPRsPerNonFPUDouble = 2;
+
+  inline static int NumAllocatableRegisters();
 
   static int ToAllocationIndex(Register reg) {
     return reg.code() - 2;  // zero_reg and 'at' are skipped.
   }
 
   static Register FromAllocationIndex(int index) {
-    ASSERT(index >= 0 && index < kNumAllocatableRegisters);
+    ASSERT(index >= 0 && index < kMaxNumAllocatableRegisters);
     return from_code(index + 2);  // zero_reg and 'at' are skipped.
   }
 
   static const char* AllocationIndexToString(int index) {
-    ASSERT(index >= 0 && index < kNumAllocatableRegisters);
+    ASSERT(index >= 0 && index < kMaxNumAllocatableRegisters);
     const char* const names[] = {
       "v0",
       "v1",
@@ -197,38 +200,19 @@ struct FPURegister {
   //  f28: 0.0
   //  f30: scratch register.
   static const int kNumReservedRegisters = 2;
-  static const int kNumAllocatableRegisters = kNumRegisters / 2 -
+  static const int kMaxNumAllocatableRegisters = kNumRegisters / 2 -
       kNumReservedRegisters;
 
-
+  inline static int NumRegisters();
+  inline static int NumAllocatableRegisters();
   inline static int ToAllocationIndex(FPURegister reg);
+  static const char* AllocationIndexToString(int index);
 
   static FPURegister FromAllocationIndex(int index) {
-    ASSERT(index >= 0 && index < kNumAllocatableRegisters);
+    ASSERT(index >= 0 && index < kMaxNumAllocatableRegisters);
     return from_code(index * 2);
   }
 
-  static const char* AllocationIndexToString(int index) {
-    ASSERT(index >= 0 && index < kNumAllocatableRegisters);
-    const char* const names[] = {
-      "f0",
-      "f2",
-      "f4",
-      "f6",
-      "f8",
-      "f10",
-      "f12",
-      "f14",
-      "f16",
-      "f18",
-      "f20",
-      "f22",
-      "f24",
-      "f26"
-    };
-    return names[index];
-  }
-
   static FPURegister from_code(int code) {
     FPURegister r = { code };
     return r;
@@ -316,6 +300,9 @@ const FPURegister f29 = { 29 };
 const FPURegister f30 = { 30 };
 const FPURegister f31 = { 31 };
 
+const Register sfpd_lo  = { kRegister_t6_Code };
+const Register sfpd_hi  = { kRegister_t7_Code };
+
 // Register aliases.
 // cp is assumed to be a callee saved register.
 // Defined using #define instead of "static const Register&" because Clang