1 files changed, 98 insertions, 0 deletions
diff --git a/Runtime/Math/FloatConversion.cpp b/Runtime/Math/FloatConversion.cpp
new file mode 100644
index 0000000..a76126d
--- /dev/null
+++ b/Runtime/Math/FloatConversion.cpp
@@ -0,0 +1,98 @@
+#include "UnityPrefix.h"
+#include "FloatConversion.h"
+
+#if UNITY_EDITOR
+
+#include "External/UnitTest++/src/UnitTest++.h"
+
+FloatToHalfConverter::FloatToHalfConverter()
+{
+	for (int i = 0; i < 256; i++)
+	{
+		int e = i - 127;
+		if (e < -24)
+		{
+			// Too small to represent becomes zero
+			m_ExponentTable[i] = 0x0000;
+			m_MantissaShift[i] = 24;
+		}
+		else if (e < -14)
+		{
+			// Small numbers become denormals
+			m_ExponentTable[i] = 0x0400 >> (-14 - e);
+			m_MantissaShift[i] = -1 - e;
+		}
+		else if (e < 16)
+		{
+			// Handle normalized numbers
+			m_ExponentTable[i] = (15 + e) << 10;
+			m_MantissaShift[i] = 13;
+		}
+		else if (e < 128)
+		{
+			// Large numbers become infinity
+			m_ExponentTable[i] = 0x7C00;
+			m_MantissaShift[i] = 24;
+		}
+		else
+		{
+			// Handle infinity and NaN
+			m_ExponentTable[i] = 0x7C00;
+			m_MantissaShift[i] = 13;
+		}
+	}
+}
+
+FloatToHalfConverter g_FloatToHalf;
+
+SUITE (FloatConversionTests)
+{
+TEST(FloatConversionTests_FloatToHalf)
+{
+	// 1 bit sign
+	for (int s = 0; s <= 1; s++)
+	{
+		// 5 bits exponent
+		for (int ebits = 0; ebits < (1 << 5); ebits++)
+		{
+			// 10 bits mantissa
+			for (int m = 0; m < (1 << 10); m++)
+			{
+				int orig = (s << 15) | (ebits << 10) | m;
+				float val;
+				HalfToFloat(orig, val);
+				UInt16 conv;
+				g_FloatToHalf.Convert(val, conv);
+				CHECK_EQUAL(orig, conv);
+			}
+		}
+	}
+}
+
+TEST(FloatConversionTests_IsFinite)
+{
+	float infF = std::numeric_limits<float>::infinity();
+	CHECK(IsFinite(0.0f));
+	CHECK(IsFinite(1.0f));
+	CHECK(IsFinite(FLT_MIN));
+	CHECK(IsFinite(FLT_MAX));
+	CHECK(IsFinite(-FLT_MIN));
+	CHECK(IsFinite(-FLT_MAX));
+	CHECK(!IsFinite(infF));
+	CHECK(!IsFinite(-infF));
+	CHECK(!IsFinite(infF-infF));
+
+	double infD = std::numeric_limits<double>::infinity();
+	CHECK(IsFinite(0.0));
+	CHECK(IsFinite(1.0));
+	CHECK(IsFinite(DBL_MIN));
+	CHECK(IsFinite(DBL_MAX));
+	CHECK(IsFinite(-DBL_MIN));
+	CHECK(IsFinite(-DBL_MAX));
+	CHECK(!IsFinite(infD));
+	CHECK(!IsFinite(-infD));
+	CHECK(!IsFinite(infD-infD));
+}
+}
+
+#endif // UNITY_EDITOR