/******************************************************************
Copyright (c) 2016 The Khronos Group Inc. All Rights Reserved.

This code is protected by copyright laws and contains material proprietary to the Khronos Group, Inc.
This is UNPUBLISHED PROPRIETARY SOURCE CODE that may not be disclosed in whole or in part to
third parties, and may not be reproduced, republished, distributed, transmitted, displayed,
broadcast or otherwise exploited in any manner without the express prior written permission
of Khronos Group. The receipt or possession of this code does not convey any rights to reproduce,
disclose, or distribute its contents, or to manufacture, use, or sell anything that it may describe,
in whole or in part other than under the terms of the Khronos Adopters Agreement
or Khronos Conformance Test Source License Agreement as executed between Khronos and the recipient.
******************************************************************/

#pragma once
#include <CL/cl.h>

#if defined(_MSC_VER) || defined(_WIN32)
#define PACKED(__STRUCT__) __pragma(pack(push, 1)) __STRUCT__ __pragma(pack(pop))
#elif defined(__GNUC__) || defined(__clang__)
#define PACKED(__STRUCT__) __STRUCT__ __attribute__((packed))
#endif

template<typename T, int n>
inline bool isVectorNotEqual(const T &lhs, const T &rhs)
{
    bool result = false;
    for (int i = 0; !result && i < n; i++) {
        result |= lhs.s[i] != rhs.s[i];
    }
    return result;
}

#define VEC_NOT_EQ_FUNC(TYPE, N)                                    \
    inline bool operator!=(const TYPE##N &lhs, const TYPE##N &rhs)  \
    {                                                               \
        return isVectorNotEqual<TYPE##N, N>(lhs, rhs);                    \
    }                                                               \

VEC_NOT_EQ_FUNC(cl_int, 2)
VEC_NOT_EQ_FUNC(cl_int, 4)
VEC_NOT_EQ_FUNC(cl_uint, 4)
VEC_NOT_EQ_FUNC(cl_float, 2)
VEC_NOT_EQ_FUNC(cl_float, 4)
VEC_NOT_EQ_FUNC(cl_double, 2)
VEC_NOT_EQ_FUNC(cl_double, 4)

template<typename T>
bool isNotEqual(const T &lhs, const T &rhs)
{
    return lhs != rhs;
}

// Can replace the following with tuples if c++11 can be used
template<typename T>
struct AbstractStruct1
{
    T val;
};

template<typename T>
inline bool operator != (const AbstractStruct1<T> &lhs, const AbstractStruct1<T> &rhs)
{
    return lhs.val != rhs.val;
}

template<typename T0, typename T1>
struct AbstractStruct2
{
    T0 val0;
    T1 val1;
};


template<typename T0, typename T1>
inline bool operator != (const AbstractStruct2<T0, T1> &lhs,
                         const AbstractStruct2<T0, T1> &rhs)
{
    return lhs.val0 != rhs.val0 || lhs.val1 != rhs.val1;
}


template<typename T> struct is_double { static const bool value = false; };
template<> struct  is_double<cl_double> { static const bool value = true; };
template<> struct  is_double<cl_double2> { static const bool value = true; };

template<typename T>
T genrandReal(RandomSeed &seed)
{
    return genrand_real1(seed);
}

template<typename T, int N>
T genrandRealVec(RandomSeed &seed)
{
    T res;
    for (int i = 0; i < N; i++) {
        res.s[i] = genrand_real1(seed);
    }
    return res;
}

#define GENRAND_REAL_FUNC(TYPE, N)                                      \
    template<> inline TYPE##N genrandReal<TYPE##N>(RandomSeed &seed)    \
    {                                                                   \
        return genrandRealVec<TYPE##N, N>(seed);                        \
    }                                                                   \

GENRAND_REAL_FUNC(cl_float, 2)
GENRAND_REAL_FUNC(cl_float, 4)
GENRAND_REAL_FUNC(cl_double, 2)
GENRAND_REAL_FUNC(cl_double, 4)

template<> inline cl_half genrandReal<cl_half>(RandomSeed &seed)
{
    return (cl_half)(genrand_int32(seed) % 2048);
}

template<typename T>
T genrand(RandomSeed &seed)
{
    return genrandReal<T>(seed);
}

template<> inline cl_int genrand<cl_int>(RandomSeed &seed)
{
    return genrand_int32(seed);
}

template<> inline cl_long genrand<cl_long>(RandomSeed &seed)
{
    return genrand_int32(seed);
}

template<> inline cl_short genrand<cl_short>(RandomSeed &seed)
{
    return genrand_int32(seed);
}

#define GENRAND_INT_VEC(T, N)                               \
    template<> inline T##N genrand<T##N>(RandomSeed &seed)  \
    {                                                       \
        T##N res;                                           \
        for (int i = 0; i < N; i++) {                       \
            res.s[i] = (T)genrand_int32(seed);              \
        }                                                   \
        return res;                                         \
    }                                                       \

GENRAND_INT_VEC(cl_int, 4)
GENRAND_INT_VEC(cl_uint, 4)
GENRAND_INT_VEC(cl_long, 2)
GENRAND_INT_VEC(cl_char, 16)

template<typename Tv>
Tv negOp(Tv in)
{
    return -in;
}

template<typename Tv>
Tv notOp(Tv in)
{
    return ~in;
}

template<typename Tv, int N>
Tv negOpVec(Tv in)
{
    Tv out;
    for (int i = 0; i < N; i++) {
        out.s[i] = -in.s[i];
    }
    return out;
}

template<typename Tv, int N>
Tv notOpVec(Tv in)
{
    Tv out;
    for (int i = 0; i < N; i++) {
        out.s[i] = ~in.s[i];
    }
    return out;
}