Fix a compile error with GCC 5 on Ubuntu.

diff --git a/fp16_test.cpp b/fp16_test.cpp
index 7a9d56612b53dbe942d2b6d1b8a079b5cdfa6c3c..402212680165b9da98dbe8c22f0c9f36063ead6e 100644 (file)
--- a/fp16_test.cpp
+++ b/fp16_test.cpp
@@ -1,6 +1,6 @@
 #include "fp16.h"
 
-#include <math.h>
+#include <cmath>
 #include <gtest/gtest.h>
 
 namespace movit {
@@ -56,27 +56,27 @@ union fp32 {
 TEST(FP16Test, NaN) {
        // Ignore the sign bit.
        EXPECT_EQ(0x7e00, fp32_to_fp16(0.0 / 0.0).val & 0x7fff);
-       EXPECT_TRUE(isnan(fp16_to_fp32(make_fp16(0xfe00))));
+       EXPECT_TRUE(std::isnan(fp16_to_fp32(make_fp16(0xfe00))));
 
        fp32 borderline_inf;
        borderline_inf.u = 0x7f800000ull;
        fp32 borderline_nan;
        borderline_nan.u = 0x7f800001ull;
 
-       ASSERT_FALSE(isfinite(borderline_inf.f));
-       ASSERT_FALSE(isnan(borderline_inf.f));
+       ASSERT_FALSE(std::isfinite(borderline_inf.f));
+       ASSERT_FALSE(std::isnan(borderline_inf.f));
 
-       ASSERT_FALSE(isfinite(borderline_nan.f));
-       ASSERT_TRUE(isnan(borderline_nan.f));
+       ASSERT_FALSE(std::isfinite(borderline_nan.f));
+       ASSERT_TRUE(std::isnan(borderline_nan.f));
 
        double borderline_inf_roundtrip = fp16_to_fp32(fp32_to_fp16(borderline_inf.f));
        double borderline_nan_roundtrip = fp16_to_fp32(fp32_to_fp16(borderline_nan.f));
 
-       EXPECT_FALSE(isfinite(borderline_inf_roundtrip));
-       EXPECT_FALSE(isnan(borderline_inf_roundtrip));
+       EXPECT_FALSE(std::isfinite(borderline_inf_roundtrip));
+       EXPECT_FALSE(std::isnan(borderline_inf_roundtrip));
 
-       EXPECT_FALSE(isfinite(borderline_nan_roundtrip));
-       EXPECT_TRUE(isnan(borderline_nan_roundtrip));
+       EXPECT_FALSE(std::isfinite(borderline_nan_roundtrip));
+       EXPECT_TRUE(std::isnan(borderline_nan_roundtrip));
 }
 
 TEST(FP16Test, Denormals) {