Enable the SSE2 Poly1305 implementation on clang-cl.

poly1305_vec.c requires SSE2 intrinsics and uint128_t. Unlike MSVC, clang-cl
supports uint128_t just fine (as long as we do not do division). This makes
ChaCha20-Poly1305 much faster on Windows when built with clang-cl.

Before:
Did 2219000 ChaCha20-Poly1305 (16 bytes) seal operations in 1016000us (2184055.1 ops/sec): 34.9 MB/s
Did 1279500 ChaCha20-Poly1305 (256 bytes) seal operations in 1016000us (1259350.4 ops/sec): 322.4 MB/s
Did 428250 ChaCha20-Poly1305 (1350 bytes) seal operations in 1015000us (421921.2 ops/sec): 569.6 MB/s
Did 84000 ChaCha20-Poly1305 (8192 bytes) seal operations in 1016000us (82677.2 ops/sec): 677.3 MB/s
Did 39750 ChaCha20-Poly1305 (16384 bytes) seal operations in 1015000us (39162.6 ops/sec): 641.6 MB/s

After:
Did 2096250 ChaCha20-Poly1305 (16 bytes) seal operations in 1015000us (2065270.9 ops/sec): 33.0 MB/s
Did 1453250 ChaCha20-Poly1305 (256 bytes) seal operations in 1016000us (1430364.2 ops/sec): 366.2 MB/s
Did 642500 ChaCha20-Poly1305 (1350 bytes) seal operations in 1015000us (633004.9 ops/sec): 854.6 MB/s
Did 136250 ChaCha20-Poly1305 (8192 bytes) seal operations in 1016000us (134104.3 ops/sec): 1098.6 MB/s
Did 69750 ChaCha20-Poly1305 (16384 bytes) seal operations in 1016000us (68651.6 ops/sec): 1124.8 MB/s

(Benchmarks gathered in VM, but this is a significant difference.)

Change-Id: Ia0a856e75995623c5621d2e48d61d945c41b17de
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/39345
Commit-Queue: David Benjamin <davidben@google.com>
Reviewed-by: Adam Langley <agl@google.com>
2 files changed
tree: 66500af4af026c645cec9dfa23410f7d016972d0
  1. .clang-format
  2. .github/
  3. .gitignore
  4. API-CONVENTIONS.md
  5. BREAKING-CHANGES.md
  6. BUILDING.md
  7. CMakeLists.txt
  8. CONTRIBUTING.md
  9. FUZZING.md
  10. INCORPORATING.md
  11. LICENSE
  12. PORTING.md
  13. README.md
  14. STYLE.md
  15. codereview.settings
  16. crypto/
  17. decrepit/
  18. fuzz/
  19. go.mod
  20. include/
  21. sources.cmake
  22. ssl/
  23. third_party/
  24. tool/
  25. util/
README.md

BoringSSL

BoringSSL is a fork of OpenSSL that is designed to meet Google's needs.

Although BoringSSL is an open source project, it is not intended for general use, as OpenSSL is. We don't recommend that third parties depend upon it. Doing so is likely to be frustrating because there are no guarantees of API or ABI stability.

Programs ship their own copies of BoringSSL when they use it and we update everything as needed when deciding to make API changes. This allows us to mostly avoid compromises in the name of compatibility. It works for us, but it may not work for you.

BoringSSL arose because Google used OpenSSL for many years in various ways and, over time, built up a large number of patches that were maintained while tracking upstream OpenSSL. As Google's product portfolio became more complex, more copies of OpenSSL sprung up and the effort involved in maintaining all these patches in multiple places was growing steadily.

Currently BoringSSL is the SSL library in Chrome/Chromium, Android (but it's not part of the NDK) and a number of other apps/programs.

Project links:

There are other files in this directory which might be helpful: