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Better definition of MBEDTLS_IS_BIG_ENDIAN for IAR

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Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
This commit is contained in:
Dave Rodgman
2023-12-05 12:06:11 +00:00
parent 001fb73131
commit f3c04f3f47
1 changed files with 16 additions and 1 deletions
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17
library/alignment.h
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@ -224,10 +224,25 @@ static inline uint64_t mbedtls_bswap64(uint64_t x)
#endif /* !defined(MBEDTLS_BSWAP64) */
#if !defined(__BYTE_ORDER__)
#if defined(__LITTLE_ENDIAN__)
/* IAR defines __xxx_ENDIAN__, but not __BYTE_ORDER__ */
#define MBEDTLS_IS_BIG_ENDIAN 0
#elif defined(__BIG_ENDIAN__)
#define MBEDTLS_IS_BIG_ENDIAN 1
#else
static const uint16_t mbedtls_byte_order_detector = { 0x100 };
#define MBEDTLS_IS_BIG_ENDIAN (*((unsigned char *) (&mbedtls_byte_order_detector)) == 0x01)
#endif
#else
#define MBEDTLS_IS_BIG_ENDIAN ((__BYTE_ORDER__) == (__ORDER_BIG_ENDIAN__))
#if (__BYTE_ORDER__) == (__ORDER_BIG_ENDIAN__)
#define MBEDTLS_IS_BIG_ENDIAN 1
#else
#define MBEDTLS_IS_BIG_ENDIAN 0
#endif
#endif /* !defined(__BYTE_ORDER__) */
/**