//
// Copyright (c) 2021 The Khronos Group Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//    http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
#ifndef COMMON_H
#define COMMON_H

#include "harness/typeWrappers.h"
#include "utility.h"

#include <array>
#include <string>
#include <vector>

// Array of thread-specific kernels for each vector size.
using KernelMatrix =
    std::array<std::vector<clKernelWrapper>, VECTOR_SIZE_COUNT>;

// Array of programs for each vector size.
using Programs = std::array<clProgramWrapper, VECTOR_SIZE_COUNT>;

// Array of buffers for each vector size.
using Buffers = std::array<clMemWrapper, VECTOR_SIZE_COUNT>;

// Types supported for kernel code generation.
enum class ParameterType
{
    Float,
    Double,
    Int,
    UInt,
    Long,
    ULong,
};

// Return kernel name suffixed with vector size.
std::string GetKernelName(int vector_size_index);

// Generate kernel code for the given builtin function/operator.
std::string GetUnaryKernel(const std::string &kernel_name, const char *builtin,
                           ParameterType retType, ParameterType type1,
                           int vector_size_index);
std::string GetUnaryKernel(const std::string &kernel_name, const char *builtin,
                           ParameterType retType1, ParameterType retType2,
                           ParameterType type1, int vector_size_index);
std::string GetBinaryKernel(const std::string &kernel_name, const char *builtin,
                            ParameterType retType, ParameterType type1,
                            ParameterType type2, int vector_size_index);
std::string GetBinaryKernel(const std::string &kernel_name, const char *builtin,
                            ParameterType retType1, ParameterType retType2,
                            ParameterType type1, ParameterType type2,
                            int vector_size_index);
std::string GetTernaryKernel(const std::string &kernel_name,
                             const char *builtin, ParameterType retType,
                             ParameterType type1, ParameterType type2,
                             ParameterType type3, int vector_size_index);

// Information to generate OpenCL kernels.
struct BuildKernelInfo
{
    // Number of kernels to build, one for each thread to avoid data races.
    cl_uint threadCount;

    KernelMatrix &kernels;

    Programs &programs;

    // Function, macro or symbol tested by the kernel.
    const char *nameInCode;

    // Whether to build with -cl-fast-relaxed-math.
    bool relaxedMode;
};

using SourceGenerator = std::string (*)(const std::string &kernel_name,
                                        const char *builtin,
                                        cl_uint vector_size_index);

/// Build kernels for all threads in "info" for the given job_id.
cl_int BuildKernels(BuildKernelInfo &info, cl_uint job_id,
                    SourceGenerator generator);

#endif /* COMMON_H */