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45 /*! \addtogroup module_simd */
48 /* Unfortunately we cannot keep static SIMD constants in the test fixture class.
49 * The problem is that SIMD memory need to be aligned, and in particular
50 * this applies to automatic storage of variables in classes. For SSE registers
51 * this means 16-byte alignment (which seems to work), but AVX requires 32-bit
52 * alignment. At least both gcc-4.7.3 and Apple clang-5.0 (OS X 10.9) fail to
53 * align these variables when they are stored as data in a class.
55 * In theory we could set some of these on-the-fly e.g. with setSimdRealFrom3R()
56 * instead (although that would mean repeating code between tests), but many of
57 * the constants depend on the current precision not to mention they
58 * occasionally have many digits that need to be exactly right, and keeping
59 * them in a single place makes sure they are consistent.
61 #ifdef GMX_SIMD_HAVE_REAL
62 const gmx_simd_real_t rSimd_1_2_3 = setSimdRealFrom3R(1, 2, 3);
63 const gmx_simd_real_t rSimd_4_5_6 = setSimdRealFrom3R(4, 5, 6);
64 const gmx_simd_real_t rSimd_7_8_9 = setSimdRealFrom3R(7, 8, 9);
65 const gmx_simd_real_t rSimd_5_7_9 = setSimdRealFrom3R(5, 7, 9);
66 const gmx_simd_real_t rSimd_m1_m2_m3 = setSimdRealFrom3R(-1, -2, -3);
67 const gmx_simd_real_t rSimd_3_1_4 = setSimdRealFrom3R(3, 1, 4);
68 const gmx_simd_real_t rSimd_m3_m1_m4 = setSimdRealFrom3R(-3, -1, -4);
69 const gmx_simd_real_t rSimd_2p25 = setSimdRealFrom1R(2.25);
70 const gmx_simd_real_t rSimd_3p75 = setSimdRealFrom1R(3.75);
71 const gmx_simd_real_t rSimd_m2p25 = setSimdRealFrom1R(-2.25);
72 const gmx_simd_real_t rSimd_m3p75 = setSimdRealFrom1R(-3.75);
73 const gmx_simd_real_t rSimd_Exp = setSimdRealFrom3R( 1.4055235171027452623914516e+18,
74 5.3057102734253445623914516e-13,
75 -2.1057102745623934534514516e+16);
76 # if (defined GMX_SIMD_HAVE_DOUBLE) && (defined GMX_DOUBLE)
77 // Make sure we also test exponents outside single precision when we use double
78 const gmx_simd_real_t rSimd_ExpDouble = setSimdRealFrom3R( 6.287393598732017379054414e+176,
79 8.794495252903116023030553e-140,
80 -3.637060701570496477655022e+202);
82 #endif // GMX_SIMD_HAVE_REAL
83 #ifdef GMX_SIMD_HAVE_INT32
84 const gmx_simd_int32_t iSimd_1_2_3 = setSimdIntFrom3I(1, 2, 3);
85 const gmx_simd_int32_t iSimd_4_5_6 = setSimdIntFrom3I(4, 5, 6);
86 const gmx_simd_int32_t iSimd_7_8_9 = setSimdIntFrom3I(7, 8, 9);
87 const gmx_simd_int32_t iSimd_5_7_9 = setSimdIntFrom3I(5, 7, 9);
88 const gmx_simd_int32_t iSimd_1M_2M_3M = setSimdIntFrom3I(1000000, 2000000, 3000000);
89 const gmx_simd_int32_t iSimd_4M_5M_6M = setSimdIntFrom3I(4000000, 5000000, 6000000);
90 const gmx_simd_int32_t iSimd_5M_7M_9M = setSimdIntFrom3I(5000000, 7000000, 9000000);
91 const gmx_simd_int32_t iSimd_0xF0F0F0F0 = setSimdIntFrom1I(0xF0F0F0F0);
92 const gmx_simd_int32_t iSimd_0xCCCCCCCC = setSimdIntFrom1I(0xCCCCCCCC);
93 #endif // GMX_SIMD_HAVE_INT32
95 #ifdef GMX_SIMD_HAVE_REAL
97 simdReal2Vector(const gmx_simd_real_t simd)
99 real mem[GMX_SIMD_REAL_WIDTH*2];
100 real * p = gmx_simd_align_r(mem);
102 gmx_simd_store_r(p, simd);
103 std::vector<real> v(p, p+GMX_SIMD_REAL_WIDTH);
109 vector2SimdReal(const std::vector<real> &v)
111 real mem[GMX_SIMD_REAL_WIDTH*2];
112 real * p = gmx_simd_align_r(mem);
114 for (int i = 0; i < GMX_SIMD_REAL_WIDTH; i++)
116 p[i] = v[i % v.size()]; // repeat vector contents to fill simd width
118 return gmx_simd_load_r(p);
122 setSimdRealFrom3R(real r0, real r1, real r2)
124 std::vector<real> v(3);
128 return vector2SimdReal(v);
132 setSimdRealFrom1R(real value)
134 std::vector<real> v(GMX_SIMD_REAL_WIDTH);
135 for (int i = 0; i < GMX_SIMD_REAL_WIDTH; i++)
139 return vector2SimdReal(v);
142 testing::AssertionResult
143 SimdTest::compareSimdRealUlp(const char * refExpr, const char * tstExpr,
144 const gmx_simd_real_t ref, const gmx_simd_real_t tst)
146 return compareVectorRealUlp(refExpr, tstExpr, simdReal2Vector(ref), simdReal2Vector(tst));
149 testing::AssertionResult
150 SimdTest::compareSimdRealEq(const char * refExpr, const char * tstExpr,
151 const gmx_simd_real_t ref, const gmx_simd_real_t tst)
153 return compareVectorEq(refExpr, tstExpr, simdReal2Vector(ref), simdReal2Vector(tst));
156 #endif // GMX_SIMD_HAVE_REAL
158 #ifdef GMX_SIMD_HAVE_INT32
160 simdInt2Vector(const gmx_simd_int32_t simd)
162 int mem[GMX_SIMD_INT32_WIDTH*2];
163 int * p = gmx_simd_align_i(mem);
165 gmx_simd_store_i(p, simd);
166 std::vector<int> v(p, p+GMX_SIMD_INT32_WIDTH);
172 vector2SimdInt(const std::vector<int> &v)
174 int mem[GMX_SIMD_INT32_WIDTH*2];
175 int * p = gmx_simd_align_i(mem);
177 for (int i = 0; i < GMX_SIMD_INT32_WIDTH; i++)
179 p[i] = v[i % v.size()]; // repeat vector contents to fill simd width
181 return gmx_simd_load_i(p);
185 setSimdIntFrom3I(int i0, int i1, int i2)
187 std::vector<int> v(3);
191 return vector2SimdInt(v);
195 setSimdIntFrom1I(int value)
197 std::vector<int> v(GMX_SIMD_INT32_WIDTH);
198 for (int i = 0; i < GMX_SIMD_INT32_WIDTH; i++)
202 return vector2SimdInt(v);
205 ::testing::AssertionResult
206 SimdTest::compareSimdInt32(const char * refExpr, const char * tstExpr,
207 const gmx_simd_int32_t ref, const gmx_simd_int32_t tst)
209 return compareVectorEq(refExpr, tstExpr, simdInt2Vector(ref), simdInt2Vector(tst));
212 #endif // GMX_SIMD_HAVE_INT32