Do not rely on actual NaN value for testing extractps.

test/cctest/test-assembler-x64.cc

Index: test/cctest/test-assembler-x64.cc
diff --git a/test/cctest/test-assembler-x64.cc b/test/cctest/test-assembler-x64.cc
index ca49dfd96ad12f29f2d1b17b532462db03a0c319..ce258ba5b6cfcc42ffac1b45c74c2b92f1d7617b 100644
--- a/test/cctest/test-assembler-x64.cc
+++ b/test/cctest/test-assembler-x64.cc
@@ -516,7 +516,10 @@ TEST(AssemblerX64Extractps) {
 #endif
 
   F3 f = FUNCTION_CAST<F3>(Code::cast(code)->entry());
-  CHECK_EQ(0x7FF80000, f(OS::nan_value()));
+  uint64_t value1 = V8_2PART_UINT64_C(0x12345678, 87654321);
+  CHECK_EQ(0x12345678, f(uint64_to_double(value1)));
+  uint64_t value2 = V8_2PART_UINT64_C(0x87654321, 12345678);
+  CHECK_EQ(0x87654321, f(uint64_to_double(value2)));
 }