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42 #include "gromacs/math/utilities.h"
43 #include "gromacs/options/basicoptions.h"
44 #include "gromacs/simd/simd.h"
45 #include "gromacs/simd/simd_math.h"
57 # if GMX_SIMD4_HAVE_REAL
60 /*! \addtogroup module_simd */
63 class Simd4MathTest : public Simd4Test
70 // Actual math function tests below
76 /*! \addtogroup module_simd */
79 // Presently, the only SIMD4 math function is 1/sqrt(x), which
80 // has a close-to-trivial implementation without different
81 // approximation intervals or special threshold points. To
82 // avoid having to re-implement the entire SIMD math function
83 // test infrastructure we only test these functions for a few
84 // values that are either special or exercise all bits.
86 TEST_F(Simd4MathTest, invsqrt)
88 const real x0 = std::numeric_limits<float>::min();
89 const real x1 = std::numeric_limits<float>::max();
92 GMX_EXPECT_SIMD4_REAL_NEAR(setSimd4RealFrom3R(1.0 / sqrt(x0), 1.0 / sqrt(x1), 1.0 / sqrt(x2)),
93 invsqrt(setSimd4RealFrom3R(x0, x1, x2)));
96 TEST_F(Simd4MathTest, invsqrtSingleAccuracy)
98 const real x0 = std::numeric_limits<float>::min();
99 const real x1 = std::numeric_limits<float>::max();
100 const real x2 = M_PI;
102 /* Increase the allowed error by the difference between the actual precision and single */
103 setUlpTolSingleAccuracy(ulpTol_);
105 GMX_EXPECT_SIMD4_REAL_NEAR(setSimd4RealFrom3R(1.0 / sqrt(x0), 1.0 / sqrt(x1), 1.0 / sqrt(x2)),
106 invsqrtSingleAccuracy(setSimd4RealFrom3R(x0, x1, x2)));
114 # endif // GMX_SIMD4_HAVE_REAL