diff options
| author | Andrey Matyukov <andrey.matyukov@intel.com> | 2020-12-08 22:53:39 +0300 |
|---|---|---|
| committer | Matt Caswell <matt@openssl.org> | 2021-03-22 09:48:00 +0000 |
| commit | c781eb1c63c243cb64dbe3066a43dc172aaab3b8 (patch) | |
| tree | 36adf4600064afddfb87e16bee0736c6427ca523 /include | |
| parent | db89d8f04bb131bbf0e2b87eb9a1515076c893d3 (diff) | |
Dual 1024-bit exponentiation optimization for Intel IceLake CPU
with AVX512_IFMA + AVX512_VL instructions, primarily for RSA CRT private key
operations. It uses 256-bit registers to avoid CPU frequency scaling issues.
The performance speedup for RSA2k signature on ICL is ~2x.
Reviewed-by: Paul Dale <pauli@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/13750)
Diffstat (limited to 'include')
| -rw-r--r-- | include/openssl/bn.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/openssl/bn.h b/include/openssl/bn.h index 1e4b27bf02..2217ec0857 100644 --- a/include/openssl/bn.h +++ b/include/openssl/bn.h @@ -312,6 +312,11 @@ int BN_mod_exp2_mont(BIGNUM *r, const BIGNUM *a1, const BIGNUM *p1, BN_CTX *ctx, BN_MONT_CTX *m_ctx); int BN_mod_exp_simple(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx); +int BN_mod_exp_mont_consttime_x2(BIGNUM *rr1, const BIGNUM *a1, const BIGNUM *p1, + const BIGNUM *m1, BN_MONT_CTX *in_mont1, + BIGNUM *rr2, const BIGNUM *a2, const BIGNUM *p2, + const BIGNUM *m2, BN_MONT_CTX *in_mont2, + BN_CTX *ctx); int BN_mask_bits(BIGNUM *a, int n); # ifndef OPENSSL_NO_STDIO |