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35 #ifndef GMX_SIMD_TESTS_SIMD4_H
36 #define GMX_SIMD_TESTS_SIMD4_H
40 * Declares fixture for testing of SIMD4 functionality.
42 * This files specializes the common base test utilities to be used
43 * for SIMD4 variables. For detailed documentation, check out the normal
44 * SIMD test classes and files.
46 * \author Erik Lindahl <erik.lindahl@scilifelab.se>
47 * \ingroup module_simd
51 #include <gtest/gtest.h>
52 #include "gromacs/simd/simd.h"
53 #include "gromacs/simd/tests/base.h"
61 /*! \addtogroup module_simd */
64 #ifdef GMX_SIMD4_HAVE_REAL
65 extern const gmx_simd4_real_t rSimd4_1_2_3; //!< Generic (different) fp values.
66 extern const gmx_simd4_real_t rSimd4_4_5_6; //!< Generic (different) fp values.
67 extern const gmx_simd4_real_t rSimd4_7_8_9; //!< Generic (different) fp values.
68 extern const gmx_simd4_real_t rSimd4_5_7_9; //!< rSimd_1_2_3 + rSimd_4_5_6.
69 extern const gmx_simd4_real_t rSimd4_m1_m2_m3; //!< Generic negative fp values.
70 extern const gmx_simd4_real_t rSimd4_3_1_4; //!< Used to test min/max.
71 extern const gmx_simd4_real_t rSimd4_m3_m1_m4; //!< negative rSimd_3_1_4.
72 extern const gmx_simd4_real_t rSimd4_2p25; //!< Value that rounds down.
73 extern const gmx_simd4_real_t rSimd4_3p75; //!< Value that rounds up.
74 extern const gmx_simd4_real_t rSimd4_m2p25; //!< Negative value that rounds up.
75 extern const gmx_simd4_real_t rSimd4_m3p75; //!< Negative value that rounds down.
76 //! Three large floating-point values whose exponents are >32.
77 extern const gmx_simd4_real_t rSimd4_Exp;
78 # if (defined GMX_SIMD_HAVE_DOUBLE) && (defined GMX_DOUBLE)
79 // Make sure we also test exponents outside single precision when we use double
80 extern const gmx_simd4_real_t rSimd4_ExpDouble;
82 extern const gmx_simd4_real_t rSimd4_Bits1; //!< Pattern F0 repeated to fill single/double.
83 extern const gmx_simd4_real_t rSimd4_Bits2; //!< Pattern CC repeated to fill single/double.
84 extern const gmx_simd4_real_t rSimd4_Bits3; //!< Pattern C0 repeated to fill single/double.
85 extern const gmx_simd4_real_t rSimd4_Bits4; //!< Pattern 0C repeated to fill single/double.
86 extern const gmx_simd4_real_t rSimd4_Bits5; //!< Pattern FC repeated to fill single/double.
87 extern const gmx_simd4_real_t rSimd4_Bits6; //!< Pattern 3C repeated to fill single/double.
91 * Test fixture for SIMD4 tests - contains test settings.
93 * This is a very simple test fixture that basically just takes the common
94 * SIMD/SIMD4 functionality from SimdBaseTest and creates wrapper routines
95 * specific for SIMD4 functionality.
97 class Simd4Test : public SimdBaseTest
100 /*! \brief Compare two real SIMD4 variables for approximate equality.
102 * This is an internal implementation routine. YOu should always use
103 * GMX_EXPECT_SIMD4_REAL_NEAR() instead.
105 * This routine is designed according to the Google test specs, so the char
106 * strings will describe the arguments to the macro.
108 * The comparison is applied to each element, and it returns true if each element
109 * in the SIMD4 test variable is within the class tolerances of the corresponding
112 ::testing::AssertionResult
113 compareSimd4RealUlp(const char * refExpr, const char * tstExpr,
114 const gmx_simd4_real_t ref, const gmx_simd4_real_t tst);
116 /*! \brief Compare two real SIMD4 variables for exact equality.
118 * This is an internal implementation routine. YOu should always use
119 * GMX_EXPECT_SIMD4_REAL_NEAR() instead.
121 * This routine is designed according to the Google test specs, so the char
122 * strings will describe the arguments to the macro.
124 * The comparison is applied to each element, and it returns true if each element
125 * in the SIMD4 test variable is within the class tolerances of the corresponding
128 ::testing::AssertionResult
129 compareSimd4RealEq(const char * refExpr, const char * tstExpr,
130 const gmx_simd4_real_t ref, const gmx_simd4_real_t tst);
133 /*! \brief Convert SIMD4 real to std::vector<real>.
135 * The returned vector will have the same length as the SIMD4 width.
137 std::vector<real> simd4Real2Vector(const gmx_simd4_real_t simd4);
139 /*! \brief Return floating-point SIMD4 value from std::vector<real>.
141 * If the vector is longer than SIMD4 width, only the first elements will be used.
142 * If it is shorter, the contents will be repeated to fill the SIMD4 register.
144 gmx_simd4_real_t vector2Simd4Real(const std::vector<real> &v);
146 /*! \brief Set SIMD4 register contents from three real values.
148 * It might seem stupid to use three values when we know that the SIMD4 width
149 * is 4, but it simplifies the test organization when the SIMD and SIMD4 tests
150 * are completely symmetric.
152 gmx_simd4_real_t setSimd4RealFrom3R(real r0, real r1, real r2);
154 /*! \brief Set SIMD4 register contents from single real value.
156 * All elements is set from the given value. This is effectively the same
157 * operation as gmx_simd4_set1_r(), but is implemented using only load/store
158 * operations that have been tested separately in the bootstrapping tests.
160 gmx_simd4_real_t setSimd4RealFrom1R(real value);
162 /*! \brief Test if a SIMD4 real is bitwise identical to reference SIMD4 value. */
163 #define GMX_EXPECT_SIMD4_REAL_EQ(ref, tst) EXPECT_PRED_FORMAT2(compareSimd4RealEq, ref, tst)
165 /*! \brief Test if a SIMD4 real is within tolerance of reference SIMD4 value. */
166 #define GMX_EXPECT_SIMD4_REAL_NEAR(ref, tst) EXPECT_PRED_FORMAT2(compareSimd4RealUlp, ref, tst)
168 #endif // GMX_SIMD4_HAVE_REAL
176 #endif // GMX_SIMD_TESTS_SIMD4_H