SS1               324 maint/gnulib/lib/sha256.c #define SS1(x) (rol(x,26)^rol(x,21)^rol(x,7))
SS1               349 maint/gnulib/lib/sha512.c #define SS1(x) u64xor (u64rol(x, 50), u64xor (u64rol (x, 46), u64rol (x, 23)))