src/gromacs/simd/support.h

   1 /*
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   5  * Mark Abraham, David van der Spoel, Berk Hess, and Erik Lindahl,
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  35 #ifndef GMX_SIMD_SUPPORT_H
  36 #define GMX_SIMD_SUPPORT_H
  37
  38
  39 /*! \libinternal \file
  40  *
  41  * \brief Functions to query compiled and supported SIMD architectures
  42  *
  43  * \author Erik Lindahl <erik.lindahl@scilifelab.se>
  44  *
  45  * \inlibraryapi
  46  * \ingroup module_simd
  47  */
  48
  49 #include "gromacs/hardware/cpuinfo.h"
  50
  51 namespace gmx
  52 {
  53
  54 /*! \cond libapi */
  55
  56 /*! \brief Enumerated options for SIMD architectures */
  57 enum class SimdType
  58 {
  59     None,           //!< Disable all SIMD support
  60     Reference,      //!< Gromacs reference software SIMD
  61     Generic,        //!< Placeholder for future support for gcc generic SIMD
  62     X86_Sse2,       //!< SSE2
  63     X86_Sse4_1,     //!< SSE4.1
  64     X86_Avx128Fma,  //!< 128-bit Avx with FMA (Amd)
  65     X86_Avx,        //!< 256-bit Avx
  66     X86_Avx2,       //!< AVX2
  67     X86_Avx2_128,   //!< 128-bit AVX2, better than 256-bit for AMD Ryzen
  68     X86_Avx512,     //!< AVX_512
  69     X86_Avx512Knl,  //!< AVX_512_KNL
  70     X86_Mic,        //!< Knight's corner
  71     Arm_Neon,       //!< 32-bit ARM NEON
  72     Arm_NeonAsimd,  //!< 64-bit ARM AArch64 Advanced SIMD
  73     Ibm_Qpx,        //!< IBM QPX SIMD (BlueGene/Q and later)
  74     Ibm_Vmx,        //!< IBM VMX SIMD (Altivec on Power6 and later)
  75     Ibm_Vsx,        //!< IBM VSX SIMD (Power7 and later)
  76     Fujitsu_HpcAce  //!< Fujitsu K-computer
  77 };
  78
  79 /*! \libinternal \brief Return a string with the name of a SIMD type
  80  *
  81  *  \param s  SIMD type to turn into string
  82  */
  83 const std::string &
  84 simdString(SimdType s);
  85
  86 /*! \libinternal \brief Return the SIMD type that would fit this hardware best */
  87 SimdType
  88 simdSuggested(const CpuInfo &c);
  89
  90 /*! \libinternal \brief Return the SIMD type the library was compiled with */
  91 SimdType
  92 simdCompiled();
  93
  94 /*! \libinternal \brief Check if binary was compiled with the provided SIMD type
  95  *
  96  *  \param s              SIMD type to query. If this matches the suggested type
  97  *                        for this cpu, the routine returns quietly.
  98  *  \param log            If not nullptr, statistics will be printed to the file.
  99  *                        If we do not have a match there will also be a warning.
 100  *  \param warnToStdErr   If true, warnings will also be printed to stderr.
 101  */
 102 bool
 103 simdCheck(SimdType         s,
 104           FILE *           log,
 105           bool             warnToStdErr);
 106
 107 /*! \endcond */
 108
 109 } // namespace gmx
 110
 111
 112 #endif // GMX_SIMD_SUPPORT_H