byteswap.hh File Reference

#include <machine/endian.h>
#include <type_traits>
#include "base/types.hh"
#include "enums/ByteOrder.hh"

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Namespaces
namespace	gem5
	Copyright (c) 2024 Arm Limited All rights reserved.

Functions
uint64_t	gem5::swap_byte64 (uint64_t x)
uint32_t	gem5::swap_byte32 (uint32_t x)
uint16_t	gem5::swap_byte16 (uint16_t x)
template<typename T >
std::enable_if_t< sizeof(T)==8 &&std::is_convertible_v< T, uint64_t >, T >	gem5::swap_byte (T x)
template<typename T >
std::enable_if_t< sizeof(T)==4 &&std::is_convertible_v< T, uint32_t >, T >	gem5::swap_byte (T x)
template<typename T >
std::enable_if_t< sizeof(T)==2 &&std::is_convertible_v< T, uint16_t >, T >	gem5::swap_byte (T x)
template<typename T >
std::enable_if_t< sizeof(T)==1 &&std::is_convertible_v< T, uint8_t >, T >	gem5::swap_byte (T x)
template<typename T , size_t N>
std::array< T, N >	gem5::swap_byte (std::array< T, N > a)
template<typename T >
T	gem5::betole (T value)
template<typename T >
T	gem5::letobe (T value)
template<typename T >
T	gem5::htole (T value)
template<typename T >
T	gem5::letoh (T value)
template<typename T >
T	gem5::htobe (T value)
template<typename T >
T	gem5::betoh (T value)
template<typename T >
T	gem5::htog (T value, ByteOrder guest_byte_order)
template<typename T >
T	gem5::gtoh (T value, ByteOrder guest_byte_order)
VirtIO endian conversion helpers
VirtIO prior to version 1.0 (legacy versions) normally send values to the host in the guest systems native byte order. This is going to change in version 1.0 which mandates little endian. We currently only support the legacy version of VirtIO (the new and shiny standard is still in a draft state and not implemented by the kernel). Once we support the new standard, we should negotiate the VirtIO version with the guest and automatically use the right type of byte swapping.
template<typename T >
std::enable_if_t< std::is_same_v< T, vring_used_elem >, T >	gem5::swap_byte (T v)
template<typename T >
std::enable_if_t< std::is_same_v< T, vring_desc >, T >	gem5::swap_byte (T v)

Variables
const ByteOrder	gem5::HostByteOrder = ByteOrder::big