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9deef9c5b8
Replace the software carry flag emulation with compiler builtins. Even the newest compilers struggle with taking advantage of the hardware carry flag. Compiler builtins allow the compiler to much more easily achieve this while still remaining constant-time. This yields an approximately 6-7% performance improvement on the ecc_gen_privkey, ecc_make_pub_key and crypto_ecdh_shared_secret functions on x86_64 on all curve sizes. Additionally, the code becomes much more readable. Signed-off-by: Fabian Blatter <fabianblatter09@gmail.com> Reviewed-by: Stefan Berger <stefanb@linux.ibm.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
1736 lines
45 KiB
1736 lines
45 KiB