[PATCH 00/18] Support -mevex512 for AVX512

[Hu, Lin1]

Hi all,

After previous discussion, instead of supporting option -mavx10.1, we
will first introduct option -m[no-]evex512, which will enable/disable
512 bit register and 64 bit mask register.

It will not change the current option behavior since if AVX512F is
enabled with no evex512 option specified, it will automatically enable
512 bit register and 64 bit mask register.

How the patches go comes following:

Patch 1 added initial support for option -mevex512.

Patch 2-6 refined current intrin file to push evex512 target for all
512 bit intrins. Those scalar intrins remained untouched.

Patch 7-11 added OPTION_MASK_ISA2_EVEX512 for all related builtins.

Patch 12 disabled zmm register, 512 bit libmvec call for no-evex512,
also requested evex512 for vectorization when using 512 bit register.

Patch 13-17 supported evex512 in related patterns.

Patch 18 added testcases for -mno-evex512 and allowed its usage.

The patches currently cause scan-asm fail for pr89229-{5,6,7}b.c since
we will emit scalar vmovss here. When trying to use x/ymm 16+ w/o
avx512vl but with avx512f+evex512, I suppose we could either emit scalar
or zmm instructions. It is quite a rare case on HW since there is no
HW w/o avx512vl but with avx512f, so I prefer to not to add maintainence
effort here to get a slightly perf improvement. But it could be changed
to former behavior.

Discussions are welcomed for all the patches.

Thx,
Haochen

Haochen Jiang (18):
  Initial support for -mevex512
  Push evex512 target for 512 bit intrins
  Push evex512 target for 512 bit intrins
  Push evex512 target for 512 bit intrins
  Push evex512 target for 512 bit intrins
  Push evex512 target for 512 bit intrins
  Add OPTION_MASK_ISA2_EVEX512 for 512 bit builtins
  Add OPTION_MASK_ISA2_EVEX512 for 512 bit builtins
  Add OPTION_MASK_ISA2_EVEX512 for 512 bit builtins
  Add OPTION_MASK_ISA2_EVEX512 for 512 bit builtins
  Add OPTION_MASK_ISA2_EVEX512 for 512 bit builtins
  Disable zmm register and 512 bit libmvec call when !TARGET_EVEX512
  Support -mevex512 for AVX512F intrins
  Support -mevex512 for AVX512DQ intrins
  Support -mevex512 for AVX512BW intrins
  Support -mevex512 for
    AVX512{IFMA,VBMI,VNNI,BF16,VPOPCNTDQ,VBMI2,BITALG,VP2INTERSECT},VAES,GFNI,VPCLMULQDQ
    intrins
  Support -mevex512 for AVX512FP16 intrins
  Allow -mno-evex512 usage

 gcc/common/config/i386/i386-common.cc       |    15 +
 gcc/config.gcc                              |    19 +-
 gcc/config/i386/avx5124fmapsintrin.h        |     2 +-
 gcc/config/i386/avx5124vnniwintrin.h        |     2 +-
 gcc/config/i386/avx512bf16intrin.h          |    31 +-
 gcc/config/i386/avx512bitalgintrin.h        |   155 +-
 gcc/config/i386/avx512bitalgvlintrin.h      |   180 +
 gcc/config/i386/avx512bwintrin.h            |   291 +-
 gcc/config/i386/avx512dqintrin.h            |  1840 +-
 gcc/config/i386/avx512erintrin.h            |     2 +-
 gcc/config/i386/avx512fintrin.h             | 19663 +++++++++---------
 gcc/config/i386/avx512fp16intrin.h          |  8925 ++++----
 gcc/config/i386/avx512ifmaintrin.h          |     4 +-
 gcc/config/i386/avx512pfintrin.h            |     2 +-
 gcc/config/i386/avx512vbmi2intrin.h         |     4 +-
 gcc/config/i386/avx512vbmiintrin.h          |     4 +-
 gcc/config/i386/avx512vnniintrin.h          |     4 +-
 gcc/config/i386/avx512vp2intersectintrin.h  |     4 +-
 gcc/config/i386/avx512vpopcntdqintrin.h     |     4 +-
 gcc/config/i386/gfniintrin.h                |    76 +-
 gcc/config/i386/i386-builtin.def            |  1312 +-
 gcc/config/i386/i386-builtins.cc            |    96 +-
 gcc/config/i386/i386-c.cc                   |     2 +
 gcc/config/i386/i386-expand.cc              |    18 +-
 gcc/config/i386/i386-options.cc             |    33 +-
 gcc/config/i386/i386.cc                     |   168 +-
 gcc/config/i386/i386.h                      |     7 +-
 gcc/config/i386/i386.md                     |   127 +-
 gcc/config/i386/i386.opt                    |     4 +
 gcc/config/i386/immintrin.h                 |     2 +
 gcc/config/i386/predicates.md               |     3 +-
 gcc/config/i386/sse.md                      |   854 +-
 gcc/config/i386/vaesintrin.h                |     4 +-
 gcc/config/i386/vpclmulqdqintrin.h          |     4 +-
 gcc/testsuite/gcc.target/i386/noevex512-1.c |    13 +
 gcc/testsuite/gcc.target/i386/noevex512-2.c |    13 +
 gcc/testsuite/gcc.target/i386/noevex512-3.c |    13 +
 gcc/testsuite/gcc.target/i386/pr89229-5b.c  |     2 +-
 gcc/testsuite/gcc.target/i386/pr89229-6b.c  |     2 +-
 gcc/testsuite/gcc.target/i386/pr89229-7b.c  |     2 +-
 gcc/testsuite/gcc.target/i386/pr90096.c     |     2 +-
 41 files changed, 17170 insertions(+), 16738 deletions(-)
 create mode 100644 gcc/config/i386/avx512bitalgvlintrin.h
 create mode 100644 gcc/testsuite/gcc.target/i386/noevex512-1.c
 create mode 100644 gcc/testsuite/gcc.target/i386/noevex512-2.c
 create mode 100644 gcc/testsuite/gcc.target/i386/noevex512-3.c

-- 
2.31.1