[SYCL][COMPLEX] Split complex header file and tests into multiple files

sycl/include/sycl/ext/oneapi/experimental/complex/complex.hpp

@@ -0,0 +1,16 @@
+//===- complex.hpp --------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#pragma once
+
+#ifdef SYCL_EXT_ONEAPI_COMPLEX
+
+#include "./detail/complex.hpp"
+#include "./detail/complex_math.hpp"
+
+#endif // SYCL_EXT_ONEAPI_COMPLEX

sycl/include/sycl/ext/oneapi/experimental/complex/detail/common.hpp

@@ -0,0 +1,62 @@
+//===- common.hpp ---------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#pragma once
+
+#include <type_traits>
+
+#include <sycl/half_type.hpp>
+
+namespace sycl {
+inline namespace _V1 {
+
+namespace ext {
+namespace oneapi {
+namespace experimental {
+
+////////////////////////////////////////////////////////////////////////////////
+/// FORWARD DECLARATIONS
+////////////////////////////////////////////////////////////////////////////////
+
+template <class _Tp> struct is_genfloat;
+
+template <class _Tp, class _Enable = void> class complex;
+
+template <class _Tp>
+class complex<_Tp, typename std::enable_if_t<is_genfloat<_Tp>::value>>;
+
+////////////////////////////////////////////////////////////////////////////////
+/// TRAITS
+////////////////////////////////////////////////////////////////////////////////
+
+template <class _Tp>
+struct is_genfloat
+    : std::integral_constant<bool, std::is_same_v<_Tp, double> ||
+                                       std::is_same_v<_Tp, float> ||
+                                       std::is_same_v<_Tp, sycl::half>> {};
+
+template <class _Tp>
+struct is_gencomplex
+    : std::integral_constant<bool,
+                             std::is_same_v<_Tp, complex<double>> ||
+                                 std::is_same_v<_Tp, complex<float>> ||
+                                 std::is_same_v<_Tp, complex<sycl::half>>> {};
+
+////////////////////////////////////////////////////////////////////////////////
+/// DEFINES
+////////////////////////////////////////////////////////////////////////////////
+
+#define _SYCL_EXT_CPLX_INLINE_VISIBILITY                                       \
+  inline __attribute__((__visibility__("hidden"), __always_inline__))
+
+} // namespace experimental
+} // namespace oneapi
+} // namespace ext
+
+} // namespace _V1
+} // namespace sycl