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/*
* Macros for swapping a value if the endianness is different
* between the target and the host.
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
#ifndef TSWAP_H
#define TSWAP_H
#include "qemu/bswap.h"
/**
* target_words_bigendian:
* Returns true if the (default) endianness of the target is big endian,
* false otherwise. Note that in target-specific code, you can use
* TARGET_BIG_ENDIAN directly instead. On the other hand, common
* code should normally never need to know about the endianness of the
* target, so please do *not* use this function unless you know very well
* what you are doing!
*/
bool target_words_bigendian(void);
/*
* If we're in target-specific code, we can hard-code the swapping
* condition, otherwise we have to do (slower) run-time checks.
*/
#ifdef COMPILING_PER_TARGET
#define target_needs_bswap() (HOST_BIG_ENDIAN != TARGET_BIG_ENDIAN)
#else
#define target_needs_bswap() (target_words_bigendian() != HOST_BIG_ENDIAN)
#endif /* COMPILING_PER_TARGET */
static inline uint16_t tswap16(uint16_t s)
{
if (target_needs_bswap()) {
return bswap16(s);
} else {
return s;
}
}
static inline uint32_t tswap32(uint32_t s)
{
if (target_needs_bswap()) {
return bswap32(s);
} else {
return s;
}
}
static inline uint64_t tswap64(uint64_t s)
{
if (target_needs_bswap()) {
return bswap64(s);
} else {
return s;
}
}
static inline void tswap16s(uint16_t *s)
{
if (target_needs_bswap()) {
*s = bswap16(*s);
}
}
static inline void tswap32s(uint32_t *s)
{
if (target_needs_bswap()) {
*s = bswap32(*s);
}
}
static inline void tswap64s(uint64_t *s)
{
if (target_needs_bswap()) {
*s = bswap64(*s);
}
}
#endif /* TSWAP_H */
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