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b939b8e42a
In commit98ed8ecfc9("exec: introduce target_words_bigendian() helper") target_words_bigendian() was matching the definition it was depending on (TARGET_WORDS_BIGENDIAN). Later in commitee3eb3a7ce("Replace TARGET_WORDS_BIGENDIAN") the definition was renamed as TARGET_BIG_ENDIAN but we didn't update the helper. Do it now mechanically using: $ sed -i -e s/target_words_bigendian/target_big_endian/g \ $(git grep -wl target_words_bigendian) Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org> Message-Id: <20250417210025.68322-1-philmd@linaro.org>
153 lines
3.3 KiB
C
153 lines
3.3 KiB
C
/*
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* Macros for swapping a value if the endianness is different
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* between the target and the host.
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*
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* SPDX-License-Identifier: LGPL-2.1-or-later
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*/
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#ifndef TSWAP_H
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#define TSWAP_H
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#include "qemu/bswap.h"
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/**
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* target_big_endian:
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* Returns true if the (default) endianness of the target is big endian,
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* false otherwise. Common code should normally never need to know about the
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* endianness of the target, so please do *not* use this function unless you
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* know very well what you are doing!
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*/
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bool target_big_endian(void);
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#ifdef COMPILING_PER_TARGET
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#define target_big_endian() TARGET_BIG_ENDIAN
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#endif
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/*
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* If we're in target-specific code, we can hard-code the swapping
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* condition, otherwise we have to do (slower) run-time checks.
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*/
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#ifdef COMPILING_PER_TARGET
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#define target_needs_bswap() (HOST_BIG_ENDIAN != TARGET_BIG_ENDIAN)
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#else
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#define target_needs_bswap() (HOST_BIG_ENDIAN != target_big_endian())
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#endif /* COMPILING_PER_TARGET */
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static inline uint16_t tswap16(uint16_t s)
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{
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if (target_needs_bswap()) {
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return bswap16(s);
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} else {
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return s;
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}
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}
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static inline uint32_t tswap32(uint32_t s)
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{
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if (target_needs_bswap()) {
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return bswap32(s);
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} else {
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return s;
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}
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}
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static inline uint64_t tswap64(uint64_t s)
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{
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if (target_needs_bswap()) {
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return bswap64(s);
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} else {
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return s;
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}
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}
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static inline void tswap16s(uint16_t *s)
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{
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if (target_needs_bswap()) {
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*s = bswap16(*s);
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}
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}
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static inline void tswap32s(uint32_t *s)
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{
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if (target_needs_bswap()) {
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*s = bswap32(*s);
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}
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}
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static inline void tswap64s(uint64_t *s)
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{
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if (target_needs_bswap()) {
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*s = bswap64(*s);
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}
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}
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/* Return ld{word}_{le,be}_p following target endianness. */
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#define LOAD_IMPL(word, args...) \
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do { \
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if (target_big_endian()) { \
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return glue(glue(ld, word), _be_p)(args); \
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} else { \
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return glue(glue(ld, word), _le_p)(args); \
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} \
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} while (0)
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static inline int lduw_p(const void *ptr)
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{
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LOAD_IMPL(uw, ptr);
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}
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static inline int ldsw_p(const void *ptr)
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{
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LOAD_IMPL(sw, ptr);
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}
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static inline int ldl_p(const void *ptr)
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{
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LOAD_IMPL(l, ptr);
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}
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static inline uint64_t ldq_p(const void *ptr)
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{
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LOAD_IMPL(q, ptr);
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}
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static inline uint64_t ldn_p(const void *ptr, int sz)
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{
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LOAD_IMPL(n, ptr, sz);
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}
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#undef LOAD_IMPL
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/* Call st{word}_{le,be}_p following target endianness. */
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#define STORE_IMPL(word, args...) \
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do { \
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if (target_big_endian()) { \
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glue(glue(st, word), _be_p)(args); \
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} else { \
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glue(glue(st, word), _le_p)(args); \
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} \
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} while (0)
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static inline void stw_p(void *ptr, uint16_t v)
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{
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STORE_IMPL(w, ptr, v);
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}
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static inline void stl_p(void *ptr, uint32_t v)
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{
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STORE_IMPL(l, ptr, v);
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}
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static inline void stq_p(void *ptr, uint64_t v)
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{
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STORE_IMPL(q, ptr, v);
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}
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static inline void stn_p(void *ptr, int sz, uint64_t v)
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{
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STORE_IMPL(n, ptr, sz, v);
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}
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#undef STORE_IMPL
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#endif /* TSWAP_H */
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