chromium/base/allocator/partition_allocator/src/partition_alloc/partition_alloc_base/numerics/safe_math_clang_gcc_impl.h

// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef PARTITION_ALLOC_PARTITION_ALLOC_BASE_NUMERICS_SAFE_MATH_CLANG_GCC_IMPL_H_
#define PARTITION_ALLOC_PARTITION_ALLOC_BASE_NUMERICS_SAFE_MATH_CLANG_GCC_IMPL_H_

#include <cassert>
#include <limits>
#include <type_traits>

#include "partition_alloc/partition_alloc_base/numerics/safe_conversions.h"

#if !defined(__native_client__) && (defined(__ARMEL__) || defined(__arch64__))
#include "partition_alloc/partition_alloc_base/numerics/safe_math_arm_impl.h"
#define PA_BASE_HAS_ASSEMBLER_SAFE_MATH …
#else
#define PA_BASE_HAS_ASSEMBLER_SAFE_MATH …
#endif

namespace partition_alloc::internal::base::internal {

// These are the non-functioning boilerplate implementations of the optimized
// safe math routines.
#if !PA_BASE_HAS_ASSEMBLER_SAFE_MATH
template <typename T, typename U>
struct CheckedMulFastAsmOp { … };

template <typename T, typename U>
struct ClampedAddFastAsmOp { … };

template <typename T, typename U>
struct ClampedSubFastAsmOp { … };

template <typename T, typename U>
struct ClampedMulFastAsmOp { … };
#endif  // PA_BASE_HAS_ASSEMBLER_SAFE_MATH
#undef PA_BASE_HAS_ASSEMBLER_SAFE_MATH

template <typename T, typename U>
struct CheckedAddFastOp { … };

template <typename T, typename U>
struct CheckedSubFastOp { … };

template <typename T, typename U>
struct CheckedMulFastOp { … };

template <typename T, typename U>
struct ClampedAddFastOp { … };

template <typename T, typename U>
struct ClampedSubFastOp { … };

template <typename T, typename U>
struct ClampedMulFastOp { … };

template <typename T>
struct ClampedNegFastOp { … };

}  // namespace partition_alloc::internal::base::internal

#endif  // PARTITION_ALLOC_PARTITION_ALLOC_BASE_NUMERICS_SAFE_MATH_CLANG_GCC_IMPL_H_