MIPS: Fix movz_movn test failure with Clang.

test/cctest/test-assembler-mips64.cc

Index: test/cctest/test-assembler-mips64.cc
diff --git a/test/cctest/test-assembler-mips64.cc b/test/cctest/test-assembler-mips64.cc
index ee6755f2591fed59193b433ad14acb24d0c99568..9e2eac2f8148fe51ed761a621fedd24a1cb1c1fc 100644
--- a/test/cctest/test-assembler-mips64.cc
+++ b/test/cctest/test-assembler-mips64.cc
@@ -2131,11 +2131,10 @@ TEST(movz_movn) {
     __ 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)) );