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Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
This commit is contained in:
Dave Rodgman 2023-06-14 20:15:15 +01:00
parent d05e7f1ab3
commit 28a97acb3c
1 changed files with 10 additions and 10 deletions
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20
library/aes.c
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@ -1037,17 +1037,17 @@ int mbedtls_aes_crypt_ecb(mbedtls_aes_context *ctx,
#if defined(MBEDTLS_CIPHER_MODE_CBC)
#if defined(__ARM_NEON) && defined(__aarch64__)
/* Avoid using the NEON implementation of mbedtls_xor. Because of the dependency on
* the result for the next block in CBC, and the cost of transferring that data from
* NEON registers, it is faster to use the following on aarch64.
* For 32-bit arm, NEON should be faster. */
/* Avoid using the NEON implementation of mbedtls_xor. Because of the dependency on
* the result for the next block in CBC, and the cost of transferring that data from
* NEON registers, it is faster to use the following on aarch64.
* For 32-bit arm, NEON should be faster. */
#define CBC_XOR_16(r, a, b) do { \
mbedtls_put_unaligned_uint64(r, \
mbedtls_get_unaligned_uint64(a) ^ \
mbedtls_get_unaligned_uint64(b)); \
mbedtls_put_unaligned_uint64(r + 8, \
mbedtls_get_unaligned_uint64(a + 8) ^ \
mbedtls_get_unaligned_uint64(b + 8)); \
mbedtls_put_unaligned_uint64(r, \
mbedtls_get_unaligned_uint64(a) ^ \
mbedtls_get_unaligned_uint64(b)); \
mbedtls_put_unaligned_uint64(r + 8, \
mbedtls_get_unaligned_uint64(a + 8) ^ \
mbedtls_get_unaligned_uint64(b + 8)); \
} while (0)
#else
#define CBC_XOR_16(r, a, b) mbedtls_xor(r, a, b, 16)