diff --git a/src/type_determiner.cc b/src/type_determiner.cc
index 7a65f68..9b1e3c9 100644
--- a/src/type_determiner.cc
+++ b/src/type_determiner.cc
@@ -628,68 +628,77 @@
 //   * asinh, acosh, atanh
 //   * exp, exp2
 //   * log, log2
-enum class GlslDataType { kFloatScalarOrVector, kIntScalarOrVector };
+enum class GlslDataType {
+  kFloatScalarOrVector,
+  kIntScalarOrVector,
+  kFloatVector
+};
 struct GlslData {
   const char* name;
   uint8_t param_count;
   uint32_t op_id;
   GlslDataType type;
+  uint8_t vector_count;
 };
 
 constexpr const GlslData kGlslData[] = {
-    {"acos", 1, GLSLstd450Acos, GlslDataType::kFloatScalarOrVector},
-    {"acosh", 1, GLSLstd450Acosh, GlslDataType::kFloatScalarOrVector},
-    {"asin", 1, GLSLstd450Asin, GlslDataType::kFloatScalarOrVector},
-    {"asinh", 1, GLSLstd450Asinh, GlslDataType::kFloatScalarOrVector},
-    {"atan", 1, GLSLstd450Atan, GlslDataType::kFloatScalarOrVector},
-    {"atan2", 2, GLSLstd450Atan2, GlslDataType::kFloatScalarOrVector},
-    {"atanh", 1, GLSLstd450Atanh, GlslDataType::kFloatScalarOrVector},
-    {"ceil", 1, GLSLstd450Ceil, GlslDataType::kFloatScalarOrVector},
-    {"cos", 1, GLSLstd450Cos, GlslDataType::kFloatScalarOrVector},
-    {"cosh", 1, GLSLstd450Cosh, GlslDataType::kFloatScalarOrVector},
-    {"degrees", 1, GLSLstd450Degrees, GlslDataType::kFloatScalarOrVector},
-    {"distance", 2, GLSLstd450Distance, GlslDataType::kFloatScalarOrVector},
-    {"exp", 1, GLSLstd450Exp, GlslDataType::kFloatScalarOrVector},
-    {"exp2", 1, GLSLstd450Exp2, GlslDataType::kFloatScalarOrVector},
-    {"fabs", 1, GLSLstd450FAbs, GlslDataType::kFloatScalarOrVector},
+    {"acos", 1, GLSLstd450Acos, GlslDataType::kFloatScalarOrVector, 0},
+    {"acosh", 1, GLSLstd450Acosh, GlslDataType::kFloatScalarOrVector, 0},
+    {"asin", 1, GLSLstd450Asin, GlslDataType::kFloatScalarOrVector, 0},
+    {"asinh", 1, GLSLstd450Asinh, GlslDataType::kFloatScalarOrVector, 0},
+    {"atan", 1, GLSLstd450Atan, GlslDataType::kFloatScalarOrVector, 0},
+    {"atan2", 2, GLSLstd450Atan2, GlslDataType::kFloatScalarOrVector, 0},
+    {"atanh", 1, GLSLstd450Atanh, GlslDataType::kFloatScalarOrVector, 0},
+    {"ceil", 1, GLSLstd450Ceil, GlslDataType::kFloatScalarOrVector, 0},
+    {"cos", 1, GLSLstd450Cos, GlslDataType::kFloatScalarOrVector, 0},
+    {"cosh", 1, GLSLstd450Cosh, GlslDataType::kFloatScalarOrVector, 0},
+    {"cross", 2, GLSLstd450Cross, GlslDataType::kFloatVector, 3},
+    {"degrees", 1, GLSLstd450Degrees, GlslDataType::kFloatScalarOrVector, 0},
+    {"distance", 2, GLSLstd450Distance, GlslDataType::kFloatScalarOrVector, 0},
+    {"exp", 1, GLSLstd450Exp, GlslDataType::kFloatScalarOrVector, 0},
+    {"exp2", 1, GLSLstd450Exp2, GlslDataType::kFloatScalarOrVector, 0},
+    {"fabs", 1, GLSLstd450FAbs, GlslDataType::kFloatScalarOrVector, 0},
     {"faceforward", 3, GLSLstd450FaceForward,
-     GlslDataType::kFloatScalarOrVector},
-    {"fclamp", 3, GLSLstd450FClamp, GlslDataType::kFloatScalarOrVector},
-    {"floor", 1, GLSLstd450Floor, GlslDataType::kFloatScalarOrVector},
-    {"fma", 3, GLSLstd450Fma, GlslDataType::kFloatScalarOrVector},
-    {"fmax", 2, GLSLstd450FMax, GlslDataType::kFloatScalarOrVector},
-    {"fmin", 2, GLSLstd450FMin, GlslDataType::kFloatScalarOrVector},
-    {"fmix", 3, GLSLstd450FMix, GlslDataType::kFloatScalarOrVector},
-    {"fract", 1, GLSLstd450Fract, GlslDataType::kFloatScalarOrVector},
-    {"fsign", 1, GLSLstd450FSign, GlslDataType::kFloatScalarOrVector},
+     GlslDataType::kFloatScalarOrVector, 0},
+    {"fclamp", 3, GLSLstd450FClamp, GlslDataType::kFloatScalarOrVector, 0},
+    {"floor", 1, GLSLstd450Floor, GlslDataType::kFloatScalarOrVector, 0},
+    {"fma", 3, GLSLstd450Fma, GlslDataType::kFloatScalarOrVector, 0},
+    {"fmax", 2, GLSLstd450FMax, GlslDataType::kFloatScalarOrVector, 0},
+    {"fmin", 2, GLSLstd450FMin, GlslDataType::kFloatScalarOrVector, 0},
+    {"fmix", 3, GLSLstd450FMix, GlslDataType::kFloatScalarOrVector, 0},
+    {"fract", 1, GLSLstd450Fract, GlslDataType::kFloatScalarOrVector, 0},
+    {"fsign", 1, GLSLstd450FSign, GlslDataType::kFloatScalarOrVector, 0},
     {"inversesqrt", 1, GLSLstd450InverseSqrt,
-     GlslDataType::kFloatScalarOrVector},
-    {"length", 1, GLSLstd450Length, GlslDataType::kFloatScalarOrVector},
-    {"log", 1, GLSLstd450Log, GlslDataType::kFloatScalarOrVector},
-    {"log2", 1, GLSLstd450Log2, GlslDataType::kFloatScalarOrVector},
-    {"nclamp", 3, GLSLstd450NClamp, GlslDataType::kFloatScalarOrVector},
-    {"nmax", 2, GLSLstd450NMax, GlslDataType::kFloatScalarOrVector},
-    {"nmin", 2, GLSLstd450NMin, GlslDataType::kFloatScalarOrVector},
-    {"normalize", 1, GLSLstd450Normalize, GlslDataType::kFloatScalarOrVector},
-    {"pow", 2, GLSLstd450Pow, GlslDataType::kFloatScalarOrVector},
-    {"radians", 1, GLSLstd450Radians, GlslDataType::kFloatScalarOrVector},
-    {"reflect", 2, GLSLstd450Reflect, GlslDataType::kFloatScalarOrVector},
-    {"round", 1, GLSLstd450Round, GlslDataType::kFloatScalarOrVector},
-    {"roundeven", 1, GLSLstd450RoundEven, GlslDataType::kFloatScalarOrVector},
-    {"sabs", 1, GLSLstd450SAbs, GlslDataType::kIntScalarOrVector},
-    {"sin", 1, GLSLstd450Sin, GlslDataType::kFloatScalarOrVector},
-    {"sinh", 1, GLSLstd450Sinh, GlslDataType::kFloatScalarOrVector},
-    {"smax", 2, GLSLstd450SMax, GlslDataType::kIntScalarOrVector},
-    {"smin", 2, GLSLstd450SMin, GlslDataType::kIntScalarOrVector},
-    {"smoothstep", 3, GLSLstd450SmoothStep, GlslDataType::kFloatScalarOrVector},
-    {"sqrt", 1, GLSLstd450Sqrt, GlslDataType::kFloatScalarOrVector},
-    {"ssign", 1, GLSLstd450SSign, GlslDataType::kIntScalarOrVector},
-    {"step", 2, GLSLstd450Step, GlslDataType::kFloatScalarOrVector},
-    {"tan", 1, GLSLstd450Tan, GlslDataType::kFloatScalarOrVector},
-    {"tanh", 1, GLSLstd450Tanh, GlslDataType::kFloatScalarOrVector},
-    {"trunc", 1, GLSLstd450Trunc, GlslDataType::kFloatScalarOrVector},
-    {"umax", 2, GLSLstd450UMax, GlslDataType::kIntScalarOrVector},
-    {"umin", 2, GLSLstd450UMin, GlslDataType::kIntScalarOrVector},
+     GlslDataType::kFloatScalarOrVector, 0},
+    {"length", 1, GLSLstd450Length, GlslDataType::kFloatScalarOrVector, 0},
+    {"log", 1, GLSLstd450Log, GlslDataType::kFloatScalarOrVector, 0},
+    {"log2", 1, GLSLstd450Log2, GlslDataType::kFloatScalarOrVector, 0},
+    {"nclamp", 3, GLSLstd450NClamp, GlslDataType::kFloatScalarOrVector, 0},
+    {"nmax", 2, GLSLstd450NMax, GlslDataType::kFloatScalarOrVector, 0},
+    {"nmin", 2, GLSLstd450NMin, GlslDataType::kFloatScalarOrVector, 0},
+    {"normalize", 1, GLSLstd450Normalize, GlslDataType::kFloatScalarOrVector,
+     0},
+    {"pow", 2, GLSLstd450Pow, GlslDataType::kFloatScalarOrVector, 0},
+    {"radians", 1, GLSLstd450Radians, GlslDataType::kFloatScalarOrVector, 0},
+    {"reflect", 2, GLSLstd450Reflect, GlslDataType::kFloatScalarOrVector, 0},
+    {"round", 1, GLSLstd450Round, GlslDataType::kFloatScalarOrVector, 0},
+    {"roundeven", 1, GLSLstd450RoundEven, GlslDataType::kFloatScalarOrVector,
+     0},
+    {"sabs", 1, GLSLstd450SAbs, GlslDataType::kIntScalarOrVector, 0},
+    {"sin", 1, GLSLstd450Sin, GlslDataType::kFloatScalarOrVector, 0},
+    {"sinh", 1, GLSLstd450Sinh, GlslDataType::kFloatScalarOrVector, 0},
+    {"smax", 2, GLSLstd450SMax, GlslDataType::kIntScalarOrVector, 0},
+    {"smin", 2, GLSLstd450SMin, GlslDataType::kIntScalarOrVector, 0},
+    {"smoothstep", 3, GLSLstd450SmoothStep, GlslDataType::kFloatScalarOrVector,
+     0},
+    {"sqrt", 1, GLSLstd450Sqrt, GlslDataType::kFloatScalarOrVector, 0},
+    {"ssign", 1, GLSLstd450SSign, GlslDataType::kIntScalarOrVector, 0},
+    {"step", 2, GLSLstd450Step, GlslDataType::kFloatScalarOrVector, 0},
+    {"tan", 1, GLSLstd450Tan, GlslDataType::kFloatScalarOrVector, 0},
+    {"tanh", 1, GLSLstd450Tanh, GlslDataType::kFloatScalarOrVector, 0},
+    {"trunc", 1, GLSLstd450Trunc, GlslDataType::kFloatScalarOrVector, 0},
+    {"umax", 2, GLSLstd450UMax, GlslDataType::kIntScalarOrVector, 0},
+    {"umin", 2, GLSLstd450UMin, GlslDataType::kIntScalarOrVector, 0},
 };
 constexpr const uint32_t kGlslDataCount = sizeof(kGlslData) / sizeof(GlslData);
 
@@ -742,6 +751,20 @@
           return nullptr;
         }
         break;
+      case GlslDataType::kFloatVector:
+        if (!result_types.back()->is_float_vector()) {
+          set_error(source, "incorrect type for " + name + ". " +
+                                "Requires float vector values");
+          return nullptr;
+        }
+        if (data->vector_count > 0 &&
+            result_types.back()->AsVector()->size() != data->vector_count) {
+          set_error(source,
+                    "incorrect vector size for " + name + ". " + "Requires " +
+                        std::to_string(data->vector_count) + " elements");
+          return nullptr;
+        }
+        break;
     }
   }
 
diff --git a/src/type_determiner_test.cc b/src/type_determiner_test.cc
index e39996c..5871be4 100644
--- a/src/type_determiner_test.cc
+++ b/src/type_determiner_test.cc
@@ -2348,8 +2348,186 @@
             "incorrect number of parameters for distance. Expected 2 got 3");
 }
 
-using ImportData_ThreeParamTest = TypeDeterminerTestWithParam<GLSLData>;
+TEST_F(TypeDeterminerTest, ImportData_Cross) {
+  ast::type::F32Type f32;
+  ast::type::VectorType vec(&f32, 3);
 
+  ast::ExpressionList vals_1;
+  vals_1.push_back(std::make_unique<ast::ScalarConstructorExpression>(
+      std::make_unique<ast::FloatLiteral>(&f32, 1.0f)));
+  vals_1.push_back(std::make_unique<ast::ScalarConstructorExpression>(
+      std::make_unique<ast::FloatLiteral>(&f32, 1.0f)));
+  vals_1.push_back(std::make_unique<ast::ScalarConstructorExpression>(
+      std::make_unique<ast::FloatLiteral>(&f32, 3.0f)));
+
+  ast::ExpressionList vals_2;
+  vals_2.push_back(std::make_unique<ast::ScalarConstructorExpression>(
+      std::make_unique<ast::FloatLiteral>(&f32, 1.0f)));
+  vals_2.push_back(std::make_unique<ast::ScalarConstructorExpression>(
+      std::make_unique<ast::FloatLiteral>(&f32, 1.0f)));
+  vals_2.push_back(std::make_unique<ast::ScalarConstructorExpression>(
+      std::make_unique<ast::FloatLiteral>(&f32, 3.0f)));
+
+  ast::ExpressionList params;
+  params.push_back(std::make_unique<ast::TypeConstructorExpression>(
+      &vec, std::move(vals_1)));
+  params.push_back(std::make_unique<ast::TypeConstructorExpression>(
+      &vec, std::move(vals_2)));
+
+  ASSERT_TRUE(td()->DetermineResultType(params)) << td()->error();
+
+  uint32_t id = 0;
+  auto* type =
+      td()->GetImportData({0, 0}, "GLSL.std.450", "cross", params, &id);
+  ASSERT_NE(type, nullptr);
+  EXPECT_TRUE(type->is_float_vector());
+  EXPECT_EQ(type->AsVector()->size(), 3u);
+  EXPECT_EQ(id, GLSLstd450Cross);
+}
+
+TEST_F(TypeDeterminerTest, ImportData_Cross_Error_Scalar) {
+  ast::type::F32Type f32;
+
+  ast::ExpressionList params;
+  params.push_back(std::make_unique<ast::ScalarConstructorExpression>(
+      std::make_unique<ast::FloatLiteral>(&f32, 1.0f)));
+  params.push_back(std::make_unique<ast::ScalarConstructorExpression>(
+      std::make_unique<ast::FloatLiteral>(&f32, 1.0f)));
+
+  ASSERT_TRUE(td()->DetermineResultType(params)) << td()->error();
+
+  uint32_t id = 0;
+  auto* type =
+      td()->GetImportData({0, 0}, "GLSL.std.450", "cross", params, &id);
+  ASSERT_EQ(type, nullptr);
+  EXPECT_EQ(td()->error(),
+            "incorrect type for cross. Requires float vector values");
+}
+
+TEST_F(TypeDeterminerTest, ImportData_Cross_Error_IntType) {
+  ast::type::I32Type i32;
+  ast::type::VectorType vec(&i32, 3);
+
+  ast::ExpressionList vals_1;
+  vals_1.push_back(std::make_unique<ast::ScalarConstructorExpression>(
+      std::make_unique<ast::SintLiteral>(&i32, 1)));
+  vals_1.push_back(std::make_unique<ast::ScalarConstructorExpression>(
+      std::make_unique<ast::SintLiteral>(&i32, 1)));
+  vals_1.push_back(std::make_unique<ast::ScalarConstructorExpression>(
+      std::make_unique<ast::SintLiteral>(&i32, 3)));
+
+  ast::ExpressionList vals_2;
+  vals_2.push_back(std::make_unique<ast::ScalarConstructorExpression>(
+      std::make_unique<ast::SintLiteral>(&i32, 1)));
+  vals_2.push_back(std::make_unique<ast::ScalarConstructorExpression>(
+      std::make_unique<ast::SintLiteral>(&i32, 1)));
+  vals_2.push_back(std::make_unique<ast::ScalarConstructorExpression>(
+      std::make_unique<ast::SintLiteral>(&i32, 3)));
+
+  ast::ExpressionList params;
+  params.push_back(std::make_unique<ast::TypeConstructorExpression>(
+      &vec, std::move(vals_1)));
+  params.push_back(std::make_unique<ast::TypeConstructorExpression>(
+      &vec, std::move(vals_2)));
+
+  ASSERT_TRUE(td()->DetermineResultType(params)) << td()->error();
+
+  uint32_t id = 0;
+  auto* type =
+      td()->GetImportData({0, 0}, "GLSL.std.450", "cross", params, &id);
+  ASSERT_EQ(type, nullptr);
+  EXPECT_EQ(td()->error(),
+            "incorrect type for cross. Requires float vector values");
+}
+
+TEST_F(TypeDeterminerTest, ImportData_Cross_Error_MissingParams) {
+  ast::type::F32Type f32;
+  ast::type::VectorType vec(&f32, 3);
+
+  ast::ExpressionList params;
+  ASSERT_TRUE(td()->DetermineResultType(params)) << td()->error();
+
+  uint32_t id = 0;
+  auto* type =
+      td()->GetImportData({0, 0}, "GLSL.std.450", "cross", params, &id);
+  ASSERT_EQ(type, nullptr);
+  EXPECT_EQ(td()->error(),
+            "incorrect number of parameters for cross. Expected 2 got 0");
+}
+
+TEST_F(TypeDeterminerTest, ImportData_Cross_Error_TooFewParams) {
+  ast::type::F32Type f32;
+  ast::type::VectorType vec(&f32, 3);
+
+  ast::ExpressionList vals_1;
+  vals_1.push_back(std::make_unique<ast::ScalarConstructorExpression>(
+      std::make_unique<ast::FloatLiteral>(&f32, 1.0f)));
+  vals_1.push_back(std::make_unique<ast::ScalarConstructorExpression>(
+      std::make_unique<ast::FloatLiteral>(&f32, 1.0f)));
+  vals_1.push_back(std::make_unique<ast::ScalarConstructorExpression>(
+      std::make_unique<ast::FloatLiteral>(&f32, 3.0f)));
+
+  ast::ExpressionList params;
+  params.push_back(std::make_unique<ast::TypeConstructorExpression>(
+      &vec, std::move(vals_1)));
+
+  ASSERT_TRUE(td()->DetermineResultType(params)) << td()->error();
+
+  uint32_t id = 0;
+  auto* type =
+      td()->GetImportData({0, 0}, "GLSL.std.450", "cross", params, &id);
+  ASSERT_EQ(type, nullptr);
+  EXPECT_EQ(td()->error(),
+            "incorrect number of parameters for cross. Expected 2 got 1");
+}
+
+TEST_F(TypeDeterminerTest, ImportData_Cross_Error_TooManyParams) {
+  ast::type::F32Type f32;
+  ast::type::VectorType vec(&f32, 3);
+
+  ast::ExpressionList vals_1;
+  vals_1.push_back(std::make_unique<ast::ScalarConstructorExpression>(
+      std::make_unique<ast::FloatLiteral>(&f32, 1.0f)));
+  vals_1.push_back(std::make_unique<ast::ScalarConstructorExpression>(
+      std::make_unique<ast::FloatLiteral>(&f32, 1.0f)));
+  vals_1.push_back(std::make_unique<ast::ScalarConstructorExpression>(
+      std::make_unique<ast::FloatLiteral>(&f32, 3.0f)));
+
+  ast::ExpressionList vals_2;
+  vals_2.push_back(std::make_unique<ast::ScalarConstructorExpression>(
+      std::make_unique<ast::FloatLiteral>(&f32, 1.0f)));
+  vals_2.push_back(std::make_unique<ast::ScalarConstructorExpression>(
+      std::make_unique<ast::FloatLiteral>(&f32, 1.0f)));
+  vals_2.push_back(std::make_unique<ast::ScalarConstructorExpression>(
+      std::make_unique<ast::FloatLiteral>(&f32, 3.0f)));
+
+  ast::ExpressionList vals_3;
+  vals_3.push_back(std::make_unique<ast::ScalarConstructorExpression>(
+      std::make_unique<ast::FloatLiteral>(&f32, 1.0f)));
+  vals_3.push_back(std::make_unique<ast::ScalarConstructorExpression>(
+      std::make_unique<ast::FloatLiteral>(&f32, 1.0f)));
+  vals_3.push_back(std::make_unique<ast::ScalarConstructorExpression>(
+      std::make_unique<ast::FloatLiteral>(&f32, 3.0f)));
+
+  ast::ExpressionList params;
+  params.push_back(std::make_unique<ast::TypeConstructorExpression>(
+      &vec, std::move(vals_1)));
+  params.push_back(std::make_unique<ast::TypeConstructorExpression>(
+      &vec, std::move(vals_2)));
+  params.push_back(std::make_unique<ast::TypeConstructorExpression>(
+      &vec, std::move(vals_3)));
+
+  ASSERT_TRUE(td()->DetermineResultType(params)) << td()->error();
+
+  uint32_t id = 0;
+  auto* type =
+      td()->GetImportData({0, 0}, "GLSL.std.450", "cross", params, &id);
+  ASSERT_EQ(type, nullptr);
+  EXPECT_EQ(td()->error(),
+            "incorrect number of parameters for cross. Expected 2 got 3");
+}
+
+using ImportData_ThreeParamTest = TypeDeterminerTestWithParam<GLSLData>;
 TEST_P(ImportData_ThreeParamTest, Scalar) {
   auto param = GetParam();