tree 2cd0ae6873aaeb07182d57dabc59321682a5bd13
parent f8068ce88574b36be69bd24d72290c9c3f5ceaf2
author Adam Langley <agl@google.com> 1545151294 -0800
committer CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org> 1545152808 +0000

Don't enable intrinsics on x86 without ABI support.

At some point after GCC 7.3, but before 8.2, GCC enabled the SSE ABI by
default. However, if it isn't enabled, the vector intrinsics in HRSS
cannot be used. (See https://github.com/grpc/grpc/issues/17540.)

Note that the intrinsics used are SSE2, but that should be ok because
they are guarded by a run-time check. The compile-time check for __SSE__
just ensures that GCC will build the code at all. (SDE does not simulate
anything that doesn't have SSE2, however.)

Change-Id: If092a06a441ed9d38576ea30351b3b40693a3399
Reviewed-on: https://boringssl-review.googlesource.com/c/33744
Reviewed-by: David Benjamin <davidben@google.com>
Commit-Queue: David Benjamin <davidben@google.com>