Add modf kernel

Author: antonwolfy

dpnp/backend/kernels/elementwise_functions/modf.hpp

@@ -0,0 +1,53 @@
+//*****************************************************************************
+// Copyright (c) 2025, Intel Corporation
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are met:
+// - Redistributions of source code must retain the above copyright notice,
+//   this list of conditions and the following disclaimer.
+// - Redistributions in binary form must reproduce the above copyright notice,
+//   this list of conditions and the following disclaimer in the documentation
+//   and/or other materials provided with the distribution.
+// - Neither the name of the copyright holder nor the names of its contributors
+//   may be used to endorse or promote products derived from this software
+//   without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+// THE POSSIBILITY OF SUCH DAMAGE.
+//*****************************************************************************
+
+#pragma once
+
+#include <sycl/sycl.hpp>
+
+namespace dpnp::kernels::modf
+{
+template <typename argT, typename fractT, typename intT>
+struct ModfFunctor
+{
+    // is function constant for given argT
+    using is_constant = typename std::false_type;
+    // constant value, if constant
+    // constexpr resT1 constant_value1 = resT1{};
+    // constexpr resT2 constant_value2 = resT2{};
+    // is function defined for sycl::vec
+    using supports_vec = typename std::false_type;
+    // do both argT and fractT, intT support subgroup store/load operation
+    using supports_sg_loadstore = typename std::true_type;
+
+    fractT operator()(const argT &in, intT &integral) const
+    {
+        return sycl::modf(in, &integral);
+    }
+};
+} // namespace dpnp::kernels::modf