[gmx-users] How can Build gromacs using MSVC on Win64 with AVX2?

[Tatsuro MATSUOKA]

>Those are kernels for legacy code that never use such simd anywhere
Doy you mean that gmxSimdFlags.cmake is not used for simd detection ?

Tatsuro



----- Original Message -----
>From: Mark Abraham <mark.j.abraham at gmail.com>
>To: Discussion list for GROMACS users <gmx-users at gromacs.org>; Tatsuro MATSUOKA <tmacchant3 at yahoo.co.jp> 
>Date: 2019/9/12, Thu 14:39
>Subject: Re: [gmx-users] How can Build gromacs using MSVC on Win64 with AVX2?
> 
>
>Hi,
>
>
>Those are kernels for legacy code that never use such simd anywhere
>
>
>Mark
>
>On Thu., 12 Sep. 2019, 07:16 Tatsuro MATSUOKA, <tmacchant3 at yahoo.co.jp> wrote:
>
>On GROMACS 2019.3, GROMACS cannot be built with AVX2.
>>
>>In gmxSimdFlags.cmake
>>
>>        SIMD_AVX2_C_FLAGS SIMD_AVX2_CXX_FLAGS
>>        "${TOOLCHAIN_FLAG_FOR_AVX2}" "-mavx2" "/arch:AVX" "-hgnu") # no AVX2-specific flag for MSVC yet
>>
>>If I modify the above, "/arch:AVX" => "/arch:AVX" ,
>>
>>-- Performing Test C_mavx2_mfma_FLAG_ACCEPTED
>>-- Performing Test C_mavx2_mfma_FLAG_ACCEPTED - Failed
>>-- Performing Test C_mavx2_FLAG_ACCEPTED
>>-- Performing Test C_mavx2_FLAG_ACCEPTED - Failed
>>-- Performing Test C_arch_AVX2_FLAG_ACCEPTED
>>-- Performing Test C_arch_AVX2_FLAG_ACCEPTED - Success
>>-- Performing Test C_arch_AVX2_COMPILE_WORKS
>>-- Performing Test C_arch_AVX2_COMPILE_WORKS - Success
>>-- Performing Test CXX_mavx2_mfma_FLAG_ACCEPTED
>>-- Performing Test CXX_mavx2_mfma_FLAG_ACCEPTED - Failed
>>-- Performing Test CXX_mavx2_FLAG_ACCEPTED
>>-- Performing Test CXX_mavx2_FLAG_ACCEPTED - Failed
>>-- Performing Test CXX_arch_AVX2_FLAG_ACCEPTED
>>-- Performing Test CXX_arch_AVX2_FLAG_ACCEPTED - Success
>>-- Performing Test CXX_arch_AVX2_COMPILE_WORKS
>>-- Performing Test CXX_arch_AVX2_COMPILE_WORKS - Success
>>-- Enabling 256-bit AVX2 SIMD instructions using CXX flags:  /arch:AVX2
>>
>>
>>But avx components 
>>
>>         nb_kernel_ElecCSTab_VdwCSTab_GeomP1P1_avx_256_single.cpp
>>         nb_kernel_ElecCSTab_VdwCSTab_GeomW3P1_avx_256_single.cpp
>>         nb_kernel_ElecCSTab_VdwCSTab_GeomW3W3_avx_256_single.cpp
>>         nb_kernel_ElecCSTab_VdwCSTab_GeomW4P1_avx_256_single.cpp
>>         nb_kernel_ElecCSTab_VdwCSTab_GeomW4W4_avx_256_single.cpp
>>         nb_kernel_ElecCSTab_VdwLJ_GeomP1P1_avx_256_single.cpp
>>         nb_kernel_ElecCSTab_VdwLJ_GeomW3P1_avx_256_single.cpp
>>are complied.
>>
>>How can I compile "avx2_256" files?
>>
>>Tatsuro
>>
>>-- 
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>
>