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Add cpu feature / target info "AVX512VBMI".

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Chang, Harry
2020-10-21 05:14:53 +00:00
committed by Konstantinos Margaritis
parent d96f1ab505
commit b19a41528a
14 changed files with 204 additions and 51 deletions
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34
doc/dev-reference/getting_started.rst
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@@ -263,17 +263,19 @@ the current platform is supported by Hyperscan.
As of this release, the variants of the runtime that are built, and the CPU
capability that is required, are the following:
+----------+-------------------------------+---------------------------+
| Variant | CPU Feature Flag(s) Required | gcc arch flag |
+==========+===============================+===========================+
| Core 2 | ``SSSE3`` | ``-march=core2`` |
+----------+-------------------------------+---------------------------+
| Core i7 | ``SSE4_2`` and ``POPCNT`` | ``-march=corei7`` |
+----------+-------------------------------+---------------------------+
| AVX 2 | ``AVX2`` | ``-march=core-avx2`` |
+----------+-------------------------------+---------------------------+
| AVX 512 | ``AVX512BW`` (see note below) | ``-march=skylake-avx512`` |
+----------+-------------------------------+---------------------------+
+--------------+---------------------------------+---------------------------+
| Variant | CPU Feature Flag(s) Required | gcc arch flag |
+==============+=================================+===========================+
| Core 2 | ``SSSE3`` | ``-march=core2`` |
+--------------+---------------------------------+---------------------------+
| Core i7 | ``SSE4_2`` and ``POPCNT`` | ``-march=corei7`` |
+--------------+---------------------------------+---------------------------+
| AVX 2 | ``AVX2`` | ``-march=core-avx2`` |
+--------------+---------------------------------+---------------------------+
| AVX 512 | ``AVX512BW`` (see note below) | ``-march=skylake-avx512`` |
+--------------+---------------------------------+---------------------------+
| AVX 512 VBMI | ``AVX512VBMI`` (see note below) | ``-march=icelake-server`` |
+--------------+---------------------------------+---------------------------+
.. note::
@@ -287,6 +289,16 @@ capability that is required, are the following:
cmake -DBUILD_AVX512=on <...>
Hyperscan v5.3 adds support for AVX512VBMI instructions - in particular the
``AVX512VBMI`` instruction set that was introduced on Intel "Icelake" Xeon
processors - however the AVX512VBMI runtime variant is **not** enabled by
default in fat runtime builds as not all toolchains support AVX512VBMI
instruction sets. To build an AVX512VBMI runtime, the CMake variable
``BUILD_AVX512VBMI`` must be enabled manually during configuration. For
example: ::
cmake -DBUILD_AVX512VBMI=on <...>
As the fat runtime requires compiler, libc, and binutils support, at this time
it will only be enabled for Linux builds where the compiler supports the
`indirect function "ifunc" function attribute