425082612c
We usually check target endianess before swapping values, so target_words_bigendian() declaration makes sense in "exec/tswap.h" with the target swapping helpers. Remove "hw/core/cpu.h" when it was only included to get the target_words_bigendian() declaration. Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Anton Johansson <anjo@rev.ng> Message-Id: <20231212123401.37493-16-philmd@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
83 lines
1.8 KiB
C
83 lines
1.8 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_words_bigendian:
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* Returns true if the (default) endianness of the target is big endian,
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* false otherwise. Note that in target-specific code, you can use
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* TARGET_BIG_ENDIAN directly instead. On the other hand, common
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* code should normally never need to know about the endianness of the
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* target, so please do *not* use this function unless you know very well
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* what you are doing!
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*/
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bool target_words_bigendian(void);
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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() (target_words_bigendian() != HOST_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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#endif /* TSWAP_H */
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