Only enable gcc -Os fix if we have AES hw support
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
diff --git a/library/aes.c b/library/aes.c
index b446265..ce458b6 100644
--- a/library/aes.c
+++ b/library/aes.c
@@ -1148,9 +1148,11 @@
* AES-XTS buffer encryption/decryption
*
* Use of MBEDTLS_OPTIMIZE_FOR_PERFORMANCE here and for mbedtls_gf128mul_x_ble()
- * is a 3x performance improvement for gcc -Os!
+ * is a 3x performance improvement for gcc -Os, if we have hardware AES support.
*/
+#if defined(MBEDTLS_AESCE_C) || defined(MBEDTLS_AESNI_C)
MBEDTLS_OPTIMIZE_FOR_PERFORMANCE
+#endif
int mbedtls_aes_crypt_xts(mbedtls_aes_xts_context *ctx,
int mode,
size_t length,