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Merge pull request #41778 from danlark1/master

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Add ldapr to AArch64 server builds
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Alexey Milovidov 2022-09-28 14:23:33 +03:00 committed by GitHub
commit 7099602d5e
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1 changed files with 4 additions and 1 deletions
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5
cmake/cpu_features.cmake
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@ -45,6 +45,8 @@ elseif (ARCH_AARCH64)
# dotprod: Scalar vector product (SDOT and UDOT instructions). Probably the most obscure extra flag with doubtful performance benefits
# but it has been activated since always, so why not enable it. It's not 100% clear in which revision this flag was
# introduced as optional, either in v8.2 [7] or in v8.4 [8].
# ldapr: Load-Acquire RCpc Register. Better support of release/acquire of atomics. Good for allocators and high contention code.
# Optional in v8.2, mandatory in v8.3 [9]. Supported in Graviton 2+, Azure and GCP instances. Generated from clang 15.
#
# [1] https://github.com/aws/aws-graviton-getting-started/blob/main/c-c%2B%2B.md
# [2] https://community.arm.com/arm-community-blogs/b/tools-software-ides-blog/posts/making-the-most-of-the-arm-architecture-in-gcc-10
@ -54,7 +56,8 @@ elseif (ARCH_AARCH64)
# [6] https://developer.arm.com/documentation/100067/0612/armclang-Command-line-Options/-mcpu?lang=en
# [7] https://gcc.gnu.org/onlinedocs/gcc/ARM-Options.html
# [8] https://developer.arm.com/documentation/102651/a/What-are-dot-product-intructions-
set (COMPILER_FLAGS "${COMPILER_FLAGS} -march=armv8.2-a+simd+crypto+dotprod+ssbs")
# [9] https://developer.arm.com/documentation/dui0801/g/A64-Data-Transfer-Instructions/LDAPR?lang=en
set (COMPILER_FLAGS "${COMPILER_FLAGS} -march=armv8.2-a+simd+crypto+dotprod+ssbs -Xclang=-target-feature -Xclang=+ldapr -Wno-unused-command-line-argument")
endif ()
elseif (ARCH_PPC64LE)