src/gromacs/simd/tests/data.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_TESTS_DATA_H
  36 #define GMX_SIMD_TESTS_DATA_H
  37
  38 /*! \internal \file
  39  * \brief Common test data constants for SIMD, SIMD4 and scalar tests
  40  *
  41  * To avoid silent bugs due to double/float truncation if we ever use the
  42  * wrong return type of routines, we want to use test data that fills all
  43  * available bits in either single or double precision. The values themselves
  44  * are meaningless.
  45  * Note that the data is used to initialize the SIMD constants, which for
  46  * technical (alignment) reasons in some compilers cannot be placed inside
  47  * the text fixture classes. For that reason this data cannot go in the
  48  * fixtures either.
  49  *
  50  * \author Erik Lindahl <erik.lindahl@scilifelab.se>
  51  * \ingroup module_simd
  52  */
  53
  54 #include "gromacs/utility/real.h"
  55
  56 namespace gmx
  57 {
  58 namespace test
  59 {
  60
  61 /*! \cond internal */
  62 /*! \addtogroup module_simd */
  63 /*! \{ */
  64 constexpr real czero = 0.0;                //!< zero
  65 constexpr real c0    = 0.3333333333333333; //!< test constant 0.0 + 1.0/3.0
  66 constexpr real c1    = 1.7142857142857144; //!< test constant 1.0 + 5.0/7.0
  67 constexpr real c2    = 2.6923076923076925; //!< test constant 2.0 + 9.0/13.0
  68 constexpr real c3    = 3.8947368421052633; //!< test constant 3.0 + 17.0/19.0
  69 constexpr real c4    = 4.793103448275862;  //!< test constant 4.0 + 23.0/29.0
  70 constexpr real c5    = 5.837837837837838;  //!< test constant 5.0 + 31.0/37.0
  71 constexpr real c6    = 6.953488372093023;  //!< test constant 6.0 + 41.0/43.0
  72 constexpr real c7    = 7.886792452830189;  //!< test constant 7.0 + 47.0/53.0
  73 constexpr real c8    = 8.967213114754099;  //!< test constant 8.0 + 59.0/61.0
  74
  75 /*! \} */
  76 /*! \endcond */
  77
  78 }      // namespace test
  79 }      // namespace gmx
  80
  81 #endif