next step in func interface in backend

Author: shssf

dpnp/backend/backend_iface_fptr.cpp

@@ -0,0 +1,128 @@
+//*****************************************************************************
+// Copyright (c) 2016-2020, 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.
+//
+// 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.
+//*****************************************************************************
+
+/*
+ * This header file is for interface Cython with C++.
+ * It should not contains any backend specific headers (like SYCL or MKL) because
+ * all included headers will be exposed in Cython compilation procedure
+ *
+ * Also, this file should contains documentation on functions and types
+ * which are used in the interface
+ */
+
+#include <cstring>
+#include <map>
+#include <stdexcept>
+
+#include <backend/backend_iface_fptr.hpp>
+
+// C function pointer to the C library template functions
+typedef void (*custom_math_2in_1out_func_ptr_t)(void*, void*, void*, size_t);
+
+typedef struct custom_math_2in_1out
+{
+    DPNPFuncType return_type;            // return type identifier which expected by the `ptr` function
+    custom_math_2in_1out_func_ptr_t ptr; //  # C function pointer
+} custom_math_2in_1out_t;
+
+typedef std::map<DPNPFuncType, custom_math_2in_1out_t> map_2p_t;
+typedef std::map<DPNPFuncType, map_2p_t> map_1p_t;
+
+// type_T3 result = func_name<T1, T2>()
+std::map<DPNPFuncName, map_1p_t> func_map =
+{
+  { DPNPFuncName::DPNP_FN_ADD,
+    { // T1. First template parameter
+      { DPNPFuncType::DPNP_FT_INT,
+        { // T2. Second template parameter
+          { DPNPFuncType::DPNP_FT_INT, { DPNPFuncType::DPNP_FT_INT, &custom_elemwise_add_c<int, int, int> }},
+          { DPNPFuncType::DPNP_FT_LONG, { DPNPFuncType::DPNP_FT_LONG, &custom_elemwise_add_c<int, long, long> }},
+          { DPNPFuncType::DPNP_FT_FLOAT, { DPNPFuncType::DPNP_FT_DOUBLE, &custom_elemwise_add_c<int, float, double> }},
+          { DPNPFuncType::DPNP_FT_DOUBLE, { DPNPFuncType::DPNP_FT_DOUBLE, &custom_elemwise_add_c<int, double, double> }}
+        }
+      },
+      { DPNPFuncType::DPNP_FT_LONG,
+        { // T2. Second template parameter
+          { DPNPFuncType::DPNP_FT_INT, { DPNPFuncType::DPNP_FT_LONG, &custom_elemwise_add_c<long, int, long> }},
+          { DPNPFuncType::DPNP_FT_LONG, { DPNPFuncType::DPNP_FT_LONG, &custom_elemwise_add_c<long, long, long> }},
+          { DPNPFuncType::DPNP_FT_FLOAT, { DPNPFuncType::DPNP_FT_DOUBLE, &custom_elemwise_add_c<long, float, double> }},
+          { DPNPFuncType::DPNP_FT_DOUBLE, { DPNPFuncType::DPNP_FT_DOUBLE, &custom_elemwise_add_c<long, double, double> }}
+        }
+      },
+      { DPNPFuncType::DPNP_FT_FLOAT,
+        { // T2. Second template parameter
+          { DPNPFuncType::DPNP_FT_INT, { DPNPFuncType::DPNP_FT_DOUBLE, &custom_elemwise_add_c<float, int, double> }},
+          { DPNPFuncType::DPNP_FT_LONG, { DPNPFuncType::DPNP_FT_DOUBLE, &custom_elemwise_add_c<float, long, double> }},
+          { DPNPFuncType::DPNP_FT_FLOAT, { DPNPFuncType::DPNP_FT_FLOAT, &custom_elemwise_add_c<float, float, float> }},
+          { DPNPFuncType::DPNP_FT_DOUBLE, { DPNPFuncType::DPNP_FT_DOUBLE, &custom_elemwise_add_c<float, double, double> }}
+        }
+      },
+      { DPNPFuncType::DPNP_FT_DOUBLE,
+        { // T2. Second template parameter
+          { DPNPFuncType::DPNP_FT_INT, { DPNPFuncType::DPNP_FT_DOUBLE, &custom_elemwise_add_c<double, int, double> }},
+          { DPNPFuncType::DPNP_FT_LONG, { DPNPFuncType::DPNP_FT_DOUBLE, &custom_elemwise_add_c<double, long, double> }},
+          { DPNPFuncType::DPNP_FT_FLOAT, { DPNPFuncType::DPNP_FT_DOUBLE, &custom_elemwise_add_c<double, float, double> }},
+          { DPNPFuncType::DPNP_FT_DOUBLE, { DPNPFuncType::DPNP_FT_DOUBLE, &custom_elemwise_add_c<double, double, double> }}
+        }
+      }
+    }
+  }
+};
+
+
+void* get_dpnp_function_ptr(DPNPFuncName func_name, DPNPFuncType func_type)
+{
+    return nullptr;
+}
+
+void* get_backend_function_name(const char *func_name, const char *type_name)
+{
+    /** Implement it in this way to allow easier play with it */
+    const char *supported_func_name = "dpnp_dot";
+    const char *supported_type1_name = "double";
+    const char *supported_type2_name = "float";
+    const char *supported_type3_name = "long";
+    const char *supported_type4_name = "int";
+
+    /** of coerce it will be converted into std::map later */
+    if (!strncmp(func_name, supported_func_name, strlen(supported_func_name)))
+    {
+        if (!strncmp(type_name, supported_type1_name, strlen(supported_type1_name)))
+        {
+            return reinterpret_cast<void*>(mkl_blas_dot_c<double> );
+        } else if (!strncmp(type_name, supported_type2_name, strlen(supported_type2_name)))
+        {
+            return reinterpret_cast<void*>(mkl_blas_dot_c<float> );
+        } else if (!strncmp(type_name, supported_type3_name, strlen(supported_type3_name)))
+        {
+            return reinterpret_cast<void*>(custom_blas_dot_c<long> );
+        } else if (!strncmp(type_name, supported_type4_name, strlen(supported_type4_name)))
+        {
+            return reinterpret_cast<void*>(custom_blas_dot_c<int> );
+        }
+    }
+
+    throw std::runtime_error("Intel NumPy Error: Unsupported function call");
+}

dpnp/backend/backend_iface_fptr.hpp

@@ -59,6 +59,7 @@
 enum class DPNPFuncName : uint32_t
 {
     DPNP_FN_NONE, /**< Very first element of the enumeration */
+    DPNP_FN_ADD,  /**< Used in numpy.add() implementation  */
     DPNP_FN_DOT,  /**< Used in numpy.dot() implementation  */
     DPNP_FN_LAST  /**< The latest element of the enumeration */
 };