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Don't enable intrinsics on x86 without ABI support.

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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>
This commit is contained in:
Adam Langley 2018-12-18 08:41:34 -08:00 committed by CQ bot account: commit-bot@chromium.org
parent f8068ce885
commit c2897a158a
1 changed files with 1 additions and 1 deletions
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crypto/hrss/hrss.c
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@ -62,7 +62,7 @@
// NEON and SSE2 for implementing some vector operations.
// TODO: MSVC can likely also be made to work with vector operations.
#if (defined(OPENSSL_X86) || defined(OPENSSL_X86_64)) && \
#if ((defined(__SSE__) && defined(OPENSSL_X86)) || defined(OPENSSL_X86_64)) && \
(defined(__clang__) || !defined(_MSC_VER))
#define HRSS_HAVE_VECTOR_UNIT