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/*
* File: equiv.hpp
* Purpose: Equivalence runtime c++ header.
* Author: Amlal El Mahrouss (amlal@nekernel.org)
* Copyright 2025, Amlal El Mahrouss, licensed under the MIT license.
*/
#pragma once
/// @brief OCL equivalence namespace.
namespace ocl::equiv
{
template <typename T>
struct basic_hash_trait
{
/// @brief hash from T's result.
static typename T::result hash()
{
static T val;
return val.hash();
}
};
template <typename T, typename U>
struct is_same
{
static constexpr bool value = false;
/// @brief check if hash matches what we expect.
constexpr bool operator()() noexcept
{
return T::hash() == U::hash();
}
};
template <typename T>
struct is_same<T, T>
{
static constexpr bool value = true;
};
template <typename T, typename U>
struct is_not_same
{
static constexpr bool value = true;
constexpr bool operator()() noexcept
{
return T::hash() != U::hash();
}
};
template <typename T>
struct is_not_same<T, T>
{
static constexpr bool value = false;
};
template <typename T>
struct equiv_is_int8
{
private:
T left_ = 127, right_ = 127;
public:
using result = T;
constexpr result hash()
{
return (left_ + right_) < 1;
}
};
template <typename T>
struct equiv_not_int8
{
private:
// these shall overflow if not int8.
T left_ = 127, right_ = 127;
public:
using result = T;
constexpr result hash()
{
return (left_ + right_) > 0;
}
};
template <typename T>
struct equiv_is_real
{
private:
T left_ = 5, right_ = 3;
public:
using result = T;
constexpr result hash()
{
return left_ / right_ == 1;
}
};
} // namespace ocl::equiv
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