MIPS64: Improve UInt32 to Double conversion.

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 9e2eac2f8148fe51ed761a621fedd24a1cb1c1fc..8fda0d290f43e027782b40f4ad39b0812013fdec 100644
--- a/test/cctest/test-assembler-mips64.cc
+++ b/test/cctest/test-assembler-mips64.cc
@@ -1186,14 +1186,14 @@ TEST(MIPS13) {
   MacroAssembler assm(isolate, NULL, 0);
 
   __ sw(a4, MemOperand(a0, offsetof(T, cvt_small_in)));
-  __ Cvt_d_uw(f10, a4, f4);
+  __ Cvt_d_uw(f10, a4);
   __ sdc1(f10, MemOperand(a0, offsetof(T, cvt_small_out)));
 
   __ Trunc_uw_d(f10, f10, f4);
   __ swc1(f10, MemOperand(a0, offsetof(T, trunc_small_out)));
 
   __ sw(a4, MemOperand(a0, offsetof(T, cvt_big_in)));
-  __ Cvt_d_uw(f8, a4, f4);
+  __ Cvt_d_uw(f8, a4);
   __ sdc1(f8, MemOperand(a0, offsetof(T, cvt_big_out)));
 
   __ Trunc_uw_d(f8, f8, f4);