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Add byteswap routines

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Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
This commit is contained in:
Dave Rodgman 2022-11-28 14:51:49 +00:00
parent e5c42594e5
commit 6298b24127
1 changed files with 29 additions and 0 deletions
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29
library/alignment.h
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@ -120,6 +120,35 @@ inline void mbedtls_put_unaligned_uint64( void *p, uint64_t x )
#define MBEDTLS_BYTE_6( x ) ( (uint8_t) ( ( ( x ) >> 48 ) & 0xff ) )
#define MBEDTLS_BYTE_7( x ) ( (uint8_t) ( ( ( x ) >> 56 ) & 0xff ) )
static inline uint16_t mbedtls_bswap16( uint16_t x ) {
return
( x & 0x00ff ) << 8 |
( x & 0xff00 ) >> 8;
}
#define MBEDTLS_BSWAP16 mbedtls_bswap16
static inline uint32_t mbedtls_bswap32( uint32_t x ) {
return
( x & 0x000000ff ) << 24 |
( x & 0x0000ff00 ) << 8 |
( x & 0x00ff0000 ) >> 8 |
( x & 0xff000000 ) >> 24;
}
#define MBEDTLS_BSWAP32 mbedtls_bswap32
static inline uint64_t mbedtls_bswap64( uint64_t x ) {
return
( x & 0x00000000000000ff ) << 56 |
( x & 0x000000000000ff00 ) << 40 |
( x & 0x0000000000ff0000 ) << 24 |
( x & 0x00000000ff000000 ) << 8 |
( x & 0x000000ff00000000 ) >> 8 |
( x & 0x0000ff0000000000 ) >> 24 |
( x & 0x00ff000000000000 ) >> 40 |
( x & 0xff00000000000000 ) >> 56;
}
#define MBEDTLS_BSWAP64 mbedtls_bswap64
#if !defined(__BYTE_ORDER__)
static const uint16_t mbedtls_byte_order_detector = { 0x100 };
#define MBEDTLS_IS_BIG_ENDIAN (*((unsigned char *) (&mbedtls_byte_order_detector)) == 0x01)