Add mips64 port.

test/cctest/test-hashing.cc

 // 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
@@ skipping 96 matching lines @@
   __ Mov(x10, Operand(string.at(0)));
   StringHelper::GenerateHashInit(masm, x0, x10);
   for (int i = 1; i < string.length(); i++) {
     __ Mov(x10, Operand(string.at(i)));
     StringHelper::GenerateHashAddCharacter(masm, x0, x10);
   }
   StringHelper::GenerateHashGetHash(masm, x0, x10);
   __ Pop(xzr, root);
   __ Ret();
   __ SetStackPointer(old_stack_pointer);
-#elif V8_TARGET_ARCH_MIPS
+#elif V8_TARGET_ARCH_MIPS || V8_TARGET_ARCH_MIPS64
   __ push(kRootRegister);
   __ InitializeRootRegister();
 
-  __ li(v0, Operand(0));
+  __ mov(v0, zero_reg);
   __ li(t1, Operand(string.at(0)));
   StringHelper::GenerateHashInit(masm, v0, t1);
   for (int i = 1; i < string.length(); i++) {
     __ li(t1, Operand(string.at(i)));
     StringHelper::GenerateHashAddCharacter(masm, v0, t1);
   }
   StringHelper::GenerateHashGetHash(masm, v0);
   __ pop(kRootRegister);
   __ jr(ra);
   __ nop();
@@ skipping 31 matching lines @@
   // csp is initialized by the calling (C++) code.
   Register old_stack_pointer = __ StackPointer();
   __ SetStackPointer(csp);
   __ Push(root, xzr);
   __ InitializeRootRegister();
   __ Mov(x0, key);
   __ GetNumberHash(x0, x10);
   __ Pop(xzr, root);
   __ Ret();
   __ SetStackPointer(old_stack_pointer);
-#elif V8_TARGET_ARCH_MIPS
+#elif V8_TARGET_ARCH_MIPS || V8_TARGET_ARCH_MIPS64
   __ push(kRootRegister);
   __ InitializeRootRegister();
   __ li(v0, Operand(key));
   __ GetNumberHash(v0, t1);
   __ pop(kRootRegister);
   __ jr(ra);
   __ nop();
 #else
 #error Unsupported architecture.
 #endif
@@ skipping 114 matching lines @@
   // Some pseudo-random numbers
   static const uint32_t kLimit = 1000;
   for (uint32_t i = 0; i < 5; i++) {
     for (uint32_t j = 0; j < 5; j++) {
       check(PseudoRandom(i, j) % kLimit);
     }
   }
 }
 
 #undef __