tree eeda4bae52d2cc2b0952cb99058a112ae2548f17
parent 522e2df08903803b4596854aed165e44ea054de1
author David Benjamin <davidben@google.com> 1576608990 -0500
committer Adam Langley <agl@google.com> 1576866566 +0000

Add an option to disable SSE2 intrinsics for testing.

We have some code which uses SSE2 intrinsics which, since they don't
have complicated build requirements, is enabled even with
OPENSSL_NO_ASM. x86_64 mandates SSE2 and people building for x86 tend to
mandate it anyway these days. This is great, but we still have generic
32-bit and 64-bit code configurations for other platforms.

32-bit generic code is covered by testing 32-bit ARM with NEON disabled.
However, 64-bit ARM always has NEON available, so we have no SIMD-less
64-bit platforms in our CI.

The immediate motivation is some bitsliced AES code I'm working on,
however I believe this also applies to the existing HRSS code. This also
fixes the HRSS feature checks to only look at __SSE2__, not __SSE__.
__SSE__ isn't sufficient and we don't compile if GCC or Clang is told
-msse -mno-sse2.

Change-Id: Iebb23f1664a2f62e0b4333e0e99f7d5f6c7f384d
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/39204
Reviewed-by: Adam Langley <agl@google.com>