diff --git a/tools/clang/unittests/HLSLExec/LongVectorOps.def b/tools/clang/unittests/HLSLExec/LongVectorOps.def
index c4f96e1b5a..002b84a1f2 100644
--- a/tools/clang/unittests/HLSLExec/LongVectorOps.def
+++ b/tools/clang/unittests/HLSLExec/LongVectorOps.def
@@ -18,6 +18,7 @@ INPUT_SET(NoZero)
 INPUT_SET(Positive)
 INPUT_SET(Bitwise)
 INPUT_SET(SelectCond)
+INPUT_SET(FloatSpecial)
 
 #undef INPUT_SET
 
@@ -125,6 +126,10 @@ OP_DEFAULT(UnaryMath, Log10, 1, "log10", "")
 OP_DEFAULT(UnaryMath, Log2, 1, "log2", "")
 OP_DEFAULT_DEFINES(UnaryMath, Frexp, 1, "TestFrexp", "", " -DFUNC_FREXP=1")
 
+OP_DEFAULT(FloatSpecial, IsFinite, 1, "isfinite", "")
+OP_DEFAULT(FloatSpecial, IsInf, 1, "isinf", "")
+OP_DEFAULT(FloatSpecial, IsNan, 1, "isnan", "")
+
 OP_DEFAULT(BinaryComparison, LessThan, 2, "", "<")
 OP_DEFAULT(BinaryComparison, LessEqual, 2, "", "<=")
 OP_DEFAULT(BinaryComparison, GreaterThan, 2, "", ">")
diff --git a/tools/clang/unittests/HLSLExec/LongVectorTestData.h b/tools/clang/unittests/HLSLExec/LongVectorTestData.h
index 24a4301299..e713413e5d 100644
--- a/tools/clang/unittests/HLSLExec/LongVectorTestData.h
+++ b/tools/clang/unittests/HLSLExec/LongVectorTestData.h
@@ -348,6 +348,20 @@ INPUT_SET(InputSet::RangeOne, 0.331, 0.727, -0.957, 0.677, -0.025, 0.495, 0.855,
 INPUT_SET(InputSet::Positive, 1.0, 1.0, 342.0, 0.01, 5531.0, 0.01, 1.0, 0.01,
           331.2330, 3250.01);
 INPUT_SET(InputSet::SelectCond, 0.0, 1.0);
+// HLSLHalf_t has a constructor which accepts a float and converts it to half
+// precision by clamping to the representable range via
+// DirectX::PackedVector::XMConvertFloatToHalf.
+INPUT_SET(InputSet::FloatSpecial, std::numeric_limits<float>::infinity(),
+          -std::numeric_limits<float>::infinity(),
+          std::numeric_limits<float>::signaling_NaN(),
+          -std::numeric_limits<float>::signaling_NaN(),
+          std::numeric_limits<float>::quiet_NaN(),
+          -std::numeric_limits<float>::quiet_NaN(), 0.0, -0.0,
+          std::numeric_limits<float>::min(), std::numeric_limits<float>::max(),
+          -std::numeric_limits<float>::min(),
+          -std::numeric_limits<float>::max(),
+          std::numeric_limits<float>::denorm_min(),
+          std::numeric_limits<float>::denorm_min() * 10.0, 1.0 / 3.0);
 END_INPUT_SETS()
 
 BEGIN_INPUT_SETS(float)
@@ -364,6 +378,17 @@ INPUT_SET(InputSet::RangeOne, 0.727f, 0.331f, -0.957f, 0.677f, -0.025f, 0.495f,
 INPUT_SET(InputSet::Positive, 1.0f, 1.0f, 65535.0f, 0.01f, 5531.0f, 0.01f, 1.0f,
           0.01f, 331.2330f, 3250.01f);
 INPUT_SET(InputSet::SelectCond, 0.0f, 1.0f);
+INPUT_SET(InputSet::FloatSpecial, std::numeric_limits<float>::infinity(),
+          -std::numeric_limits<float>::infinity(),
+          std::numeric_limits<float>::signaling_NaN(),
+          -std::numeric_limits<float>::signaling_NaN(),
+          std::numeric_limits<float>::quiet_NaN(),
+          -std::numeric_limits<float>::quiet_NaN(), 0.0f, -0.0f,
+          std::numeric_limits<float>::min(), std::numeric_limits<float>::max(),
+          -std::numeric_limits<float>::min(),
+          -std::numeric_limits<float>::max(),
+          std::numeric_limits<float>::denorm_min(),
+          std::numeric_limits<float>::denorm_min() * 10.0f, 1.0f / 3.0f);
 END_INPUT_SETS()
 
 BEGIN_INPUT_SETS(double)
diff --git a/tools/clang/unittests/HLSLExec/LongVectors.cpp b/tools/clang/unittests/HLSLExec/LongVectors.cpp
index 93a46d02fb..27b6bd023e 100644
--- a/tools/clang/unittests/HLSLExec/LongVectors.cpp
+++ b/tools/clang/unittests/HLSLExec/LongVectors.cpp
@@ -1140,6 +1140,20 @@ STRICT_OP_1(OpType::LoadAndStore_DT_SB_SRV, (A));
 STRICT_OP_1(OpType::LoadAndStore_RD_SB_UAV, (A));
 STRICT_OP_1(OpType::LoadAndStore_RD_SB_SRV, (A));
 
+//
+// Float Ops
+//
+
+#define FLOAT_SPECIAL_OP(OP, IMPL)                                             \
+  template <typename T> struct Op<OP, T, 1> : StrictValidation {               \
+    HLSLBool_t operator()(T A) { return IMPL; }                                \
+  };
+
+FLOAT_SPECIAL_OP(OpType::IsFinite, (std::isfinite(A)));
+FLOAT_SPECIAL_OP(OpType::IsInf, (std::isinf(A)));
+FLOAT_SPECIAL_OP(OpType::IsNan, (std::isnan(A)));
+#undef FLOAT_SPECIAL_OP
+
 //
 // dispatchTest
 //
@@ -1671,6 +1685,16 @@ class DxilConf_SM69_Vectorized {
   HLK_TEST(Abs, double);
   HLK_TEST(Sign, double);
 
+  // Float Special
+
+  HLK_TEST(IsFinite, HLSLHalf_t);
+  HLK_TEST(IsInf, HLSLHalf_t);
+  HLK_TEST(IsNan, HLSLHalf_t);
+
+  HLK_TEST(IsFinite, float);
+  HLK_TEST(IsInf, float);
+  HLK_TEST(IsNan, float);
+
   // Binary Comparison
 
   HLK_TEST(LessThan, int16_t);