The default `./config` will enable the X86_64 ASM implementation of SM2. Use `./config -DGMSSL_NO_TURBO enable-ec_nistp_64_gcc_128` will enable the fast C implementation of SM2. The `./config -DGMSSL_NO_TURBO` will use the original implementation.
This update is part of the GmSSL Turbo project.
This work is supported by the National Key Research and Development
Program of China NO.2018YFB0803601 and Intel.
