tree 030a451903ff311d1765bd35ea568627bd9791cb
parent 81ed2b3f6a135449772c46980067b8d4f71f5c82
author Andres Erbsen <andreser@google.com> 1695670124 +0000
committer Boringssl LUCI CQ <boringssl-scoped@luci-project-accounts.iam.gserviceaccount.com> 1696472920 +0000

Add table-independent x86+adx asm for P-256

With -march=haswell -DOPENSSL_SMALL=1 on cascadelake:
Did 9999 ECDH P-256 operations in 1062469us (9411.1 ops/sec) [+63.5%]
Did 25000 ECDSA P-256 signing operations in 1028302us (24311.9 ops/sec) [+48.9%]
Did 11004 ECDSA P-256 verify operations in 1072646us (10258.7 ops/sec) [+58.8%]

Same configuration measured no performance difference on haswell.

The added assembly code occupies 1352 bytes.

Change-Id: I42635b7a9bf24d942817976a5d4ce269f642251c
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/63185
Reviewed-by: David Benjamin <davidben@google.com>
Commit-Queue: David Benjamin <davidben@google.com>