The vectorization is implemented using vector extensions (of gcc/clang)
and will work on any architecture with 128 bit vector registers that has
the builtin `vec_mulh` for the high part of a multiplication.
Enable this for s390x.
The speed-up factor on z17 is around 2--3.4.
Signed-off-by: Timo Keller <tkeller@linux.ibm.com>
Reviewed-by: Shane Lontis <shane.lontis@oracle.com>
Reviewed-by: Saša Nedvědický <sashan@openssl.org>
MergeDate: Wed Jun 10 09:25:58 2026
(Merged from https://github.com/openssl/openssl/pull/30812)
24486294f7