MIPS: Fix movz_movn test failure with Clang.

test/cctest/test-assembler-mips64.cc

 // Copyright 2012 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 2113 matching lines @@
     float outputs_S[kTableLength] = {
       4.8, 4.8, -4.8, -0.29
     };
     double outputs_D[kTableLength] = {
       5.3, -5.3, 5.3, -2.9
     };
 
     __ ldc1(f2, MemOperand(a0, offsetof(TestFloat, a)) );
     __ lwc1(f6, MemOperand(a0, offsetof(TestFloat, c)) );
     __ lw(t0, MemOperand(a0, offsetof(TestFloat, rt)) );
-    __ li(t1, 0x0);
-    __ mtc1(t1, f12);
-    __ mtc1(t1, f10);
-    __ mtc1(t1, f16);
-    __ mtc1(t1, f14);
+    __ Move(f12, 0.0);
+    __ Move(f10, 0.0);
+    __ Move(f16, 0.0);
+    __ Move(f14, 0.0);
     __ sdc1(f12, MemOperand(a0, offsetof(TestFloat, bold)) );
     __ swc1(f10, MemOperand(a0, offsetof(TestFloat, dold)) );
     __ sdc1(f16, MemOperand(a0, offsetof(TestFloat, bold1)) );
     __ swc1(f14, MemOperand(a0, offsetof(TestFloat, dold1)) );
     __ movz_s(f10, f6, t0);
     __ movz_d(f12, f2, t0);
     __ movn_s(f14, f6, t0);
     __ movn_d(f16, f2, t0);
     __ swc1(f10, MemOperand(a0, offsetof(TestFloat, d)) );
     __ sdc1(f12, MemOperand(a0, offsetof(TestFloat, b)) );
@@ skipping 3338 matching lines @@
   };
 
   size_t nr_test_cases = sizeof(tc) / sizeof(TestCaseBal);
   for (size_t i = 0; i < nr_test_cases; ++i) {
     CHECK_EQ(tc[i].expected_res, run_bal(tc[i].offset));
   }
 }
 
 
 #undef __