diff options
| author | Daniel Hu <Daniel.Hu@arm.com> | 2022-02-07 10:17:06 +0000 |
|---|---|---|
| committer | Pauli <pauli@openssl.org> | 2022-05-03 14:37:46 +1000 |
| commit | b1b2146ded9ce5a84c62f30c6c4a922b449f6c90 (patch) | |
| tree | 969d007a0e310df537f7f9495b353bbad4e984d4 /crypto/arm64cpuid.pl | |
| parent | 04904a0fff639c058d38b355d75485ca5dde0a89 (diff) | |
Acceleration of chacha20 on aarch64 by SVE
This patch accelerates chacha20 on aarch64 when Scalable Vector Extension
(SVE) is supported by CPU. Tested on modern micro-architecture with
256-bit SVE, it has the potential to improve performance up to 20%
The solution takes a hybrid approach. SVE will handle multi-blocks that fit
the SVE vector length, with Neon/Scalar to process any tail data
Test result:
With SVE
type 1024 bytes 8192 bytes 16384 bytes
ChaCha20 1596208.13k 1650010.79k 1653151.06k
Without SVE (by Neon/Scalar)
type 1024 bytes 8192 bytes 16384 bytes
chacha20 1355487.91k 1372678.83k 1372662.44k
The assembly code has been reviewed internally by
ARM engineer Fangming.Fang@arm.com
Signed-off-by: Daniel Hu <Daniel.Hu@arm.com>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/17916)
Diffstat (limited to 'crypto/arm64cpuid.pl')
| -rwxr-xr-x | crypto/arm64cpuid.pl | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/crypto/arm64cpuid.pl b/crypto/arm64cpuid.pl index ad48c53402..0a6cd01e30 100755 --- a/crypto/arm64cpuid.pl +++ b/crypto/arm64cpuid.pl @@ -104,6 +104,22 @@ _armv8_eor3_probe: ret .size _armv8_eor3_probe,.-_armv8_eor3_probe +.globl _armv8_sve_probe +.type _armv8_sve_probe,%function +_armv8_sve_probe: + AARCH64_VALID_CALL_TARGET + .inst 0x04a03000 // eor z0.d,z0.d,z0.d + ret +.size _armv8_sve_probe,.-_armv8_sve_probe + +.globl _armv8_sve2_probe +.type _armv8_sve2_probe,%function +_armv8_sve2_probe: + AARCH64_VALID_CALL_TARGET + .inst 0x04e03400 // xar z0.d,z0.d,z0.d + ret +.size _armv8_sve2_probe,.-_armv8_sve2_probe + .globl _armv8_cpuid_probe .type _armv8_cpuid_probe,%function _armv8_cpuid_probe: |