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47 /*! \addtogroup module_simd */
50 /* Unfortunately we cannot keep static SIMD constants in the test fixture class.
51 * The problem is that SIMD memory need to be aligned, and in particular
52 * this applies to automatic storage of variables in classes. For SSE registers
53 * this means 16-byte alignment (which seems to work), but AVX requires 32-bit
54 * alignment. At least both gcc-4.7.3 and Apple clang-5.0 (OS X 10.9) fail to
55 * align these variables when they are stored as data in a class.
57 * In theory we could set some of these on-the-fly e.g. with setSimdRealFrom3R()
58 * instead (although that would mean repeating code between tests), but many of
59 * the constants depend on the current precision not to mention they
60 * occasionally have many digits that need to be exactly right, and keeping
61 * them in a single place makes sure they are consistent.
63 #ifdef GMX_SIMD_HAVE_REAL
64 const gmx_simd_real_t rSimd_1_2_3 = setSimdRealFrom3R(1, 2, 3);
65 const gmx_simd_real_t rSimd_4_5_6 = setSimdRealFrom3R(4, 5, 6);
66 const gmx_simd_real_t rSimd_7_8_9 = setSimdRealFrom3R(7, 8, 9);
67 const gmx_simd_real_t rSimd_5_7_9 = setSimdRealFrom3R(5, 7, 9);
68 const gmx_simd_real_t rSimd_m1_m2_m3 = setSimdRealFrom3R(-1, -2, -3);
69 const gmx_simd_real_t rSimd_3_1_4 = setSimdRealFrom3R(3, 1, 4);
70 const gmx_simd_real_t rSimd_m3_m1_m4 = setSimdRealFrom3R(-3, -1, -4);
71 const gmx_simd_real_t rSimd_2p25 = setSimdRealFrom1R(2.25);
72 const gmx_simd_real_t rSimd_3p75 = setSimdRealFrom1R(3.75);
73 const gmx_simd_real_t rSimd_m2p25 = setSimdRealFrom1R(-2.25);
74 const gmx_simd_real_t rSimd_m3p75 = setSimdRealFrom1R(-3.75);
75 const gmx_simd_real_t rSimd_Exp = setSimdRealFrom3R( 1.4055235171027452623914516e+18,
76 5.3057102734253445623914516e-13,
77 -2.1057102745623934534514516e+16);
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 const gmx_simd_real_t rSimd_ExpDouble = setSimdRealFrom3R( 6.287393598732017379054414e+176,
81 8.794495252903116023030553e-140,
82 -3.637060701570496477655022e+202);
83 // Magic FP numbers corresponding to specific bit patterns
84 const gmx_simd_real_t rSimd_Bits1 = setSimdRealFrom1R(-1.07730874267432137e+236);
85 const gmx_simd_real_t rSimd_Bits2 = setSimdRealFrom1R(-9.25596313493178307e+061);
86 const gmx_simd_real_t rSimd_Bits3 = setSimdRealFrom1R(-8.57750588235293981e+003);
87 const gmx_simd_real_t rSimd_Bits4 = setSimdRealFrom1R( 1.22416778341839096e-250);
88 const gmx_simd_real_t rSimd_Bits5 = setSimdRealFrom1R(-1.15711777004554095e+294);
89 const gmx_simd_real_t rSimd_Bits6 = setSimdRealFrom1R( 1.53063836115600621e-018);
91 // Magic FP numbers corresponding to specific bit patterns
92 const gmx_simd_real_t rSimd_Bits1 = setSimdRealFrom1R(-5.9654142337e+29);
93 const gmx_simd_real_t rSimd_Bits2 = setSimdRealFrom1R(-1.0737417600e+08);
94 const gmx_simd_real_t rSimd_Bits3 = setSimdRealFrom1R(-6.0235290527e+00);
95 const gmx_simd_real_t rSimd_Bits4 = setSimdRealFrom1R( 1.0788832913e-31);
96 const gmx_simd_real_t rSimd_Bits5 = setSimdRealFrom1R(-1.0508719529e+37);
97 const gmx_simd_real_t rSimd_Bits6 = setSimdRealFrom1R( 1.1488970369e-02);
99 #endif // GMX_SIMD_HAVE_REAL
100 #ifdef GMX_SIMD_HAVE_INT32
101 const gmx_simd_int32_t iSimd_1_2_3 = setSimdIntFrom3I(1, 2, 3);
102 const gmx_simd_int32_t iSimd_4_5_6 = setSimdIntFrom3I(4, 5, 6);
103 const gmx_simd_int32_t iSimd_7_8_9 = setSimdIntFrom3I(7, 8, 9);
104 const gmx_simd_int32_t iSimd_5_7_9 = setSimdIntFrom3I(5, 7, 9);
105 const gmx_simd_int32_t iSimd_1M_2M_3M = setSimdIntFrom3I(1000000, 2000000, 3000000);
106 const gmx_simd_int32_t iSimd_4M_5M_6M = setSimdIntFrom3I(4000000, 5000000, 6000000);
107 const gmx_simd_int32_t iSimd_5M_7M_9M = setSimdIntFrom3I(5000000, 7000000, 9000000);
108 const gmx_simd_int32_t iSimd_0xF0F0F0F0 = setSimdIntFrom1I(0xF0F0F0F0);
109 const gmx_simd_int32_t iSimd_0xCCCCCCCC = setSimdIntFrom1I(0xCCCCCCCC);
110 #endif // GMX_SIMD_HAVE_INT32
112 #ifdef GMX_SIMD_HAVE_REAL
114 simdReal2Vector(const gmx_simd_real_t simd)
116 real mem[GMX_SIMD_REAL_WIDTH*2];
117 real * p = gmx_simd_align_r(mem);
119 gmx_simd_store_r(p, simd);
120 std::vector<real> v(p, p+GMX_SIMD_REAL_WIDTH);
126 vector2SimdReal(const std::vector<real> &v)
128 real mem[GMX_SIMD_REAL_WIDTH*2];
129 real * p = gmx_simd_align_r(mem);
131 for (int i = 0; i < GMX_SIMD_REAL_WIDTH; i++)
133 p[i] = v[i % v.size()]; // repeat vector contents to fill simd width
135 return gmx_simd_load_r(p);
139 setSimdRealFrom3R(real r0, real r1, real r2)
141 std::vector<real> v(3);
145 return vector2SimdReal(v);
149 setSimdRealFrom1R(real value)
151 std::vector<real> v(GMX_SIMD_REAL_WIDTH);
152 for (int i = 0; i < GMX_SIMD_REAL_WIDTH; i++)
156 return vector2SimdReal(v);
159 testing::AssertionResult
160 SimdTest::compareSimdRealUlp(const char * refExpr, const char * tstExpr,
161 const gmx_simd_real_t ref, const gmx_simd_real_t tst)
163 return compareVectorRealUlp(refExpr, tstExpr, simdReal2Vector(ref), simdReal2Vector(tst));
166 testing::AssertionResult
167 SimdTest::compareSimdRealEq(const char * refExpr, const char * tstExpr,
168 const gmx_simd_real_t ref, const gmx_simd_real_t tst)
170 return compareVectorEq(refExpr, tstExpr, simdReal2Vector(ref), simdReal2Vector(tst));
173 #endif // GMX_SIMD_HAVE_REAL
175 #ifdef GMX_SIMD_HAVE_INT32
177 simdInt2Vector(const gmx_simd_int32_t simd)
179 int mem[GMX_SIMD_INT32_WIDTH*2];
180 int * p = gmx_simd_align_i(mem);
182 gmx_simd_store_i(p, simd);
183 std::vector<int> v(p, p+GMX_SIMD_INT32_WIDTH);
189 vector2SimdInt(const std::vector<int> &v)
191 int mem[GMX_SIMD_INT32_WIDTH*2];
192 int * p = gmx_simd_align_i(mem);
194 for (int i = 0; i < GMX_SIMD_INT32_WIDTH; i++)
196 p[i] = v[i % v.size()]; // repeat vector contents to fill simd width
198 return gmx_simd_load_i(p);
202 setSimdIntFrom3I(int i0, int i1, int i2)
204 std::vector<int> v(3);
208 return vector2SimdInt(v);
212 setSimdIntFrom1I(int value)
214 std::vector<int> v(GMX_SIMD_INT32_WIDTH);
215 for (int i = 0; i < GMX_SIMD_INT32_WIDTH; i++)
219 return vector2SimdInt(v);
222 ::testing::AssertionResult
223 SimdTest::compareSimdInt32(const char * refExpr, const char * tstExpr,
224 const gmx_simd_int32_t ref, const gmx_simd_int32_t tst)
226 return compareVectorEq(refExpr, tstExpr, simdInt2Vector(ref), simdInt2Vector(tst));
229 #endif // GMX_SIMD_HAVE_INT32