#if defined(__x86_64) || defined(__x86_64__) || \
defined(_M_AMD64) || defined(_M_X64) || \
- defined(__powerpc64__) || defined(_ARCH_PP64)
+ defined(__powerpc64__) || defined(_ARCH_PP64) || \
+ defined(__aarch64__)
/*
* Montgomery mul modulo Order(P): res = a*b*2^-256 mod Order(P)
*/