src/gromacs/simd/tests/simd4.cpp

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  35 #include "gmxpre.h"
  36
  37 #include "simd4.h"
  38
  39 #include "gromacs/simd/simd.h"
  40 #include "gromacs/utility/basedefinitions.h"
  41
  42 #include "data.h"
  43
  44 #if GMX_SIMD
  45
  46 namespace gmx
  47 {
  48 namespace test
  49 {
  50
  51 /*! \cond internal */
  52 /*! \addtogroup module_simd */
  53 /*! \{ */
  54
  55 #if GMX_SIMD4_HAVE_REAL
  56
  57 const Simd4Real rSimd4_c0c1c2   = setSimd4RealFrom3R( c0, c1, c2);
  58 const Simd4Real rSimd4_c3c4c5   = setSimd4RealFrom3R( c3, c4, c5);
  59 const Simd4Real rSimd4_c6c7c8   = setSimd4RealFrom3R( c6, c7, c8);
  60 const Simd4Real rSimd4_c3c0c4   = setSimd4RealFrom3R( c3, c0, c4);
  61 const Simd4Real rSimd4_c4c6c8   = setSimd4RealFrom3R( c4, c6, c8);
  62 const Simd4Real rSimd4_c7c2c3   = setSimd4RealFrom3R( c7, c2, c3);
  63 const Simd4Real rSimd4_m0m1m2   = setSimd4RealFrom3R(-c0, -c1, -c2);
  64 const Simd4Real rSimd4_m3m0m4   = setSimd4RealFrom3R(-c3, -c0, -c4);
  65 const Simd4Real rSimd4_2p25     = setSimd4RealFrom1R(2.25);
  66 const Simd4Real rSimd4_3p75     = setSimd4RealFrom1R(3.75);
  67 const Simd4Real rSimd4_m2p25    = setSimd4RealFrom1R(-2.25);
  68 const Simd4Real rSimd4_m3p75    = setSimd4RealFrom1R(-3.75);
  69
  70 #if GMX_SIMD_HAVE_LOGICAL
  71 // The numbers below all have exponent (2^0), which will not change with AND/OR operations.
  72 // We also leave the last part of the mantissa as zeros, to avoid rounding issues in the compiler
  73 #if GMX_DOUBLE
  74 const Simd4Real rSimd4_logicalA         = setSimd4RealFrom1R(1.3333333332557231188); // mantissa 01010101010101010101010101010101
  75 const Simd4Real rSimd4_logicalB         = setSimd4RealFrom1R(1.7999999998137354851); // mantissa 11001100110011001100110011001100
  76 const Simd4Real rSimd4_logicalResultAnd = setSimd4RealFrom1R(1.266666666604578495);  // mantissa 01000100010001000100010001000100
  77 const Simd4Real rSimd4_logicalResultOr  = setSimd4RealFrom1R(1.8666666664648801088); // mantissa 11011101110111011101110111011101
  78 #else                                                                                // GMX_DOUBLE
  79 const Simd4Real rSimd4_logicalA         = setSimd4RealFrom1R(1.3333282470703125);    // mantissa 0101010101010101
  80 const Simd4Real rSimd4_logicalB         = setSimd4RealFrom1R(1.79998779296875);      // mantissa 1100110011001100
  81 const Simd4Real rSimd4_logicalResultAnd = setSimd4RealFrom1R(1.26666259765625);      // mantissa 0100010001000100
  82 const Simd4Real rSimd4_logicalResultOr  = setSimd4RealFrom1R(1.8666534423828125);    // mantissa 1101110111011101
  83 #endif                                                                               // GMX_DOUBLE
  84 #endif                                                                               // GMX_SIMD_HAVE_LOGICAL
  85
  86 ::std::vector<real>
  87 simd4Real2Vector(const Simd4Real simd4)
  88 {
  89     alignas(GMX_SIMD_ALIGNMENT) real  mem[GMX_SIMD4_WIDTH];
  90
  91     store4(mem, simd4);
  92     std::vector<real>   v(mem, mem+GMX_SIMD4_WIDTH);
  93
  94     return v;
  95 }
  96
  97 Simd4Real
  98 vector2Simd4Real(const std::vector<real> &v)
  99 {
 100     alignas(GMX_SIMD_ALIGNMENT) real  mem[GMX_SIMD4_WIDTH];
 101
 102     for (int i = 0; i < GMX_SIMD4_WIDTH; i++)
 103     {
 104         mem[i] = v[i % v.size()];  // repeat vector contents to fill simd width
 105     }
 106     return load4(mem);
 107 }
 108
 109 Simd4Real
 110 setSimd4RealFrom3R(real r0, real r1, real r2)
 111 {
 112     std::vector<real> v(3);
 113     v[0] = r0;
 114     v[1] = r1;
 115     v[2] = r2;
 116     return vector2Simd4Real(v);
 117 }
 118
 119 Simd4Real
 120 setSimd4RealFrom1R(real value)
 121 {
 122     std::vector<real> v(GMX_SIMD4_WIDTH);
 123     for (int i = 0; i < GMX_SIMD4_WIDTH; i++)
 124     {
 125         v[i] = value;
 126     }
 127     return vector2Simd4Real(v);
 128 }
 129
 130 testing::AssertionResult
 131 Simd4Test::compareSimd4RealUlp(const char *  refExpr,     const char *  tstExpr,
 132                                const Simd4Real ref, const Simd4Real tst)
 133 {
 134     return compareVectorRealUlp(refExpr, tstExpr, simd4Real2Vector(ref), simd4Real2Vector(tst));
 135 }
 136
 137 testing::AssertionResult
 138 Simd4Test::compareSimd4RealEq(const char * refExpr, const char * tstExpr,
 139                               const Simd4Real ref, const Simd4Real tst)
 140 {
 141     return compareVectorEq(refExpr, tstExpr, simd4Real2Vector(ref), simd4Real2Vector(tst));
 142 }
 143
 144 #endif  // GMX_SIMD4_HAVE_REAL
 145
 146 /*! \} */
 147 /*! \endcond */
 148
 149 }      // namespace test
 150 }      // namespace gmx
 151
 152 #endif // GMX_SIMD