[Patch] x86: Enable GCC support for Intel AVX-VNNI extension

[Hongyu Wang]

Hi:

This patch is about to support Intel AVX-VNNI instructions.

AVX-VNNI is an equivalent to AVX512-VNNI with VEX encoding. The
instructions are same, but with extra {vex} prefix to distinguish from
AVX512-VNNI instructions in assembler.

For more details, please refer to
https://software.intel.com/content/dam/develop/external/us/en/documents/architecture-instruction-set-extensions-programming-reference.pdf

Bootstrap ok, regression test on i386/x86 backend is ok.

OK for master?

2020-10-13  Hongtao Liu  <hongtao.liu@intel.com>
        Hongyu Wang  <hongyu.wang@intel.com>

gcc/
    * common/config/i386/cpuinfo.h (get_available_features):
    Detect AVXVNNI.
    * common/config/i386/i386-common.c
    (OPTION_MASK_ISA2_AVXVNNI_SET,
    OPTION_MASK_ISA2_AVXVNNI_UNSET, OPTION_MASK_ISA2_AVX2_UNSET):
    New.
    (ix86_hanlde_option): Handle -mavxvnni, unset avxvnni when
    avx2 is disabled.
    * common/config/i386/i386-cpuinfo.h (enum processor_features):
    Add FEATURE_AVXVNNI.
    * common/config/i386/i386-isas.h: Add ISA_NAMES_TABLE_ENTRY
    for avxvnni.
    * config.gcc: Add avxvnniintrin.h.
    * config/i386/avx512vnniintrin.h: Remove 128/256 bit non-mask
    intrinsics.
    * config/i386/avxvnniintrin.h: New header file.
    * config/i386/cpuid.h (bit_AVXVNNI): New.
    * config/i386/i386-builtins.c (def_builtin): Handle AVXVNNI mask
    for unified builtin.
    * config/i386/i386-builtin.def (BDESC): Adjust AVX512VNNI
    builtins for AVXVNNI.
    * config/i386/i386-c.c (ix86_target_macros_internal): Define
    __AVXVNNI__.
    * config/i386/i386-expand.c (ix86_expand_builtin): Handle bisa
    for AVXVNNI to support unified intrinsic name, since there is no
    dependency between AVX512VNNI and AVXVNNI.
    * config/i386/i386-options.c (isa2_opts): Add -mavxvnni.
    (ix86_valid_target_attribute_inner_p): Handle avxnnni.
    (ix86_valid_target_attribute_inner_p): Ditto.
    * config/i386/i386.h (TARGET_AVXVNNI, TARGET_AVXVNNI_P,
    TARGET_AVXVNNI_P, PTA_AVXVNNI): New.
    (PTA_SAPPHIRERAPIDS): Add AVX_VNNI.
    (PTA_ALDERLAKE): Likewise.
    * config/i386/i386.md ("isa"): Add avxvnni, avx512vnnivl.
    ("enabled"): Adjust for avxvnni and avx512vnnivl.
    * config/i386/i386.opt: Add option -mavxvnni.
    * config/i386/immintrin.h: Include avxvnniintrin.h.
    * config/i386/sse.md (vpdpbusd_<mode>): Adjust for AVXVNNI.
    (vpdpbusds_<mode>): Likewise.
    (vpdpwssd_<mode>): Likewise.
    (vpdpwssds_<mode>): Likewise.
    (vpdpbusd_v16si): New.
    (vpdpbusds_v16si): Likewise.
    (vpdpwssd_v16si): Likewise.
    (vpdpwssds_v16si): Likewise.
    * doc/invoke.texi: Document -mavxvnni.
    * doc/extend.texi: Document avxvnni.
    * doc/sourcebuild.texi: Document target avxvnni.

gcc/testsuite/

    * gcc.target/i386/avx512vl-vnni-1.c: Rename..
    * gcc.target/i386/avx512vl-vnni-1a.c: To This.
    * gcc.target/i386/avx512vl-vnni-1b.c: New test.
    * gcc.target/i386/avx512vl-vnni-2.c: Ditto.
    * gcc.target/i386/avx512vl-vnni-3.c: Ditto.
    * gcc.target/i386/avx-vnni-1.c: Ditto.
    * gcc.target/i386/avx-vnni-2.c: Ditto.
    * gcc.target/i386/avx-vnni-3.c: Ditto.
    * gcc.target/i386/avx-vnni-4.c: Ditto.
    * gcc.target/i386/avx-vnni-5.c: Ditto.
    * gcc.target/i386/avx-vnni-6.c: Ditto.
    * gcc.target/i386/avx-vpdpbusd-2.c: Ditto.
    * gcc.target/i386/avx-vpdpbusds-2.c: Ditto.
    * gcc.target/i386/avx-vpdpwssd-2.c: Ditto.
    * gcc.target/i386/avx-vpdpwssds-2.c: Ditto.
    * gcc.target/i386/vnni_inline_error.c: Ditto.
    * gcc.target/i386/avx512vnnivl-builtin.c: Ditto.
    * gcc.target/i386/avxvnni-builtin.c: Ditto.
    * gcc.target/i386/funcspec-56.inc: Add new target attribute.
    * gcc.target/i386/pr83488-3.c: Adjust.
    * gcc.target/i386/sse-12.c: Add -mavxvnni.
    * gcc.target/i386/sse-13.c: Ditto.
    * gcc.target/i386/sse-14.c: Ditto.
    * gcc.target/i386/sse-22.c: Ditto.
    * gcc.target/i386/sse-23.c: Ditto.
    * g++.dg/other/i386-2.C: Ditto.
    * g++.dg/other/i386-3.C: Ditto.
    * lib/target-supports.exp (check_effective_target_avxvnni):
    New proc.

-- 
Regards,

Hongyu, Wang
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