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40 #include "gromacs/math/utilities.h"
52 /*! \addtogroup module_simd */
55 #ifdef GMX_SIMD4_HAVE_REAL
57 /*! \brief Test fixture for SIMD4 floating-point operations (identical to the SIMD4 \ref Simd4Test) */
58 typedef Simd4Test Simd4FloatingpointTest;
60 TEST_F(Simd4FloatingpointTest, gmxSimd4SetZeroR)
62 GMX_EXPECT_SIMD4_REAL_EQ(setSimd4RealFrom1R(0.0), gmx_simd4_setzero_r());
65 TEST_F(Simd4FloatingpointTest, gmxSimd4Set1R)
67 GMX_EXPECT_SIMD4_REAL_EQ(setSimd4RealFrom1R(1.0), gmx_simd4_set1_r(1.0));
70 TEST_F(Simd4FloatingpointTest, gmxSimd4Load1R)
73 GMX_EXPECT_SIMD4_REAL_EQ(setSimd4RealFrom1R(r), gmx_simd4_load1_r(&r));
76 TEST_F(Simd4FloatingpointTest, gmxSimd4AddR)
78 GMX_EXPECT_SIMD4_REAL_EQ(rSimd4_5_7_9, gmx_simd4_add_r(rSimd4_1_2_3, rSimd4_4_5_6)); // 1+4=5, 2+5=7, 3+6=9
81 TEST_F(Simd4FloatingpointTest, gmxSimd4SubR)
83 GMX_EXPECT_SIMD4_REAL_EQ(rSimd4_4_5_6, gmx_simd4_sub_r(rSimd4_5_7_9, rSimd4_1_2_3)); // 5-1=4, 7-2=5, 9-3=6
86 TEST_F(Simd4FloatingpointTest, gmxSimd4MulR)
88 GMX_EXPECT_SIMD4_REAL_EQ(setSimd4RealFrom3R(4, 10, 18), gmx_simd4_mul_r(rSimd4_1_2_3, rSimd4_4_5_6));
91 TEST_F(Simd4FloatingpointTest, gmxSimd4FmaddR)
93 GMX_EXPECT_SIMD4_REAL_EQ(setSimd4RealFrom3R(11, 18, 27), gmx_simd4_fmadd_r(rSimd4_1_2_3, rSimd4_4_5_6, rSimd4_7_8_9)); // 1*4+7, etc.
96 TEST_F(Simd4FloatingpointTest, gmxSimd4FmsubR)
98 GMX_EXPECT_SIMD4_REAL_EQ(setSimd4RealFrom3R(-3, 2, 9), gmx_simd4_fmsub_r(rSimd4_1_2_3, rSimd4_4_5_6, rSimd4_7_8_9)); // 1*4-7, etc.
101 TEST_F(Simd4FloatingpointTest, gmxSimd4FnmaddR)
103 GMX_EXPECT_SIMD4_REAL_EQ(setSimd4RealFrom3R(3, -2, -9), gmx_simd4_fnmadd_r(rSimd4_1_2_3, rSimd4_4_5_6, rSimd4_7_8_9)); // -1*4+7, etc.
106 TEST_F(Simd4FloatingpointTest, gmxSimd4FnmsubR)
108 GMX_EXPECT_SIMD4_REAL_EQ(setSimd4RealFrom3R(-11, -18, -27), gmx_simd4_fnmsub_r(rSimd4_1_2_3, rSimd4_4_5_6, rSimd4_7_8_9)); // -1*4-7, etc.
111 TEST_F(Simd4FloatingpointTest, gmxSimd4FabsR)
113 GMX_EXPECT_SIMD4_REAL_EQ(rSimd4_1_2_3, gmx_simd4_fabs_r(rSimd4_1_2_3)); // fabs(x)=x
114 GMX_EXPECT_SIMD4_REAL_EQ(rSimd4_1_2_3, gmx_simd4_fabs_r(rSimd4_m1_m2_m3)); // fabs(-x)=x
117 TEST_F(Simd4FloatingpointTest, gmxSimd4FnegR)
119 GMX_EXPECT_SIMD4_REAL_EQ(rSimd4_m1_m2_m3, gmx_simd4_fneg_r(rSimd4_1_2_3)); // fneg(x)=-x
120 GMX_EXPECT_SIMD4_REAL_EQ(rSimd4_1_2_3, gmx_simd4_fneg_r(rSimd4_m1_m2_m3)); // fneg(-x)=x
123 #ifdef GMX_SIMD4_HAVE_LOGICAL
124 TEST_F(Simd4FloatingpointTest, gmxSimd4AndR)
126 GMX_EXPECT_SIMD4_REAL_EQ(rSimd4_Bits3, gmx_simd4_and_r(rSimd4_Bits1, rSimd4_Bits2)); // Bits1 & Bits2 = Bits3
129 TEST_F(Simd4FloatingpointTest, gmxSimd4AndnotR)
131 GMX_EXPECT_SIMD4_REAL_EQ(rSimd4_Bits4, gmx_simd4_andnot_r(rSimd4_Bits1, rSimd4_Bits2)); // (~Bits1) & Bits2 = Bits3
134 TEST_F(Simd4FloatingpointTest, gmxSimd4OrR)
136 GMX_EXPECT_SIMD4_REAL_EQ(rSimd4_Bits5, gmx_simd4_or_r(rSimd4_Bits1, rSimd4_Bits2)); // Bits1 | Bits2 = Bits3
139 TEST_F(Simd4FloatingpointTest, gmxSimd4XorR)
141 GMX_EXPECT_SIMD4_REAL_EQ(rSimd4_Bits6, gmx_simd4_xor_r(rSimd4_Bits1, rSimd4_Bits2)); // Bits1 ^ Bits2 = Bits3
145 TEST_F(Simd4FloatingpointTest, gmxSimd4MaxR)
147 GMX_EXPECT_SIMD4_REAL_EQ(setSimd4RealFrom3R(3, 2, 4), gmx_simd4_max_r(rSimd4_1_2_3, rSimd4_3_1_4));
148 GMX_EXPECT_SIMD4_REAL_EQ(setSimd4RealFrom3R(3, 2, 4), gmx_simd4_max_r(rSimd4_3_1_4, rSimd4_1_2_3));
149 GMX_EXPECT_SIMD4_REAL_EQ(setSimd4RealFrom3R(-1, -1, -3), gmx_simd4_max_r(rSimd4_m1_m2_m3, rSimd4_m3_m1_m4));
150 GMX_EXPECT_SIMD4_REAL_EQ(setSimd4RealFrom3R(-1, -1, -3), gmx_simd4_max_r(rSimd4_m3_m1_m4, rSimd4_m1_m2_m3));
153 TEST_F(Simd4FloatingpointTest, gmxSimd4MinR)
155 GMX_EXPECT_SIMD4_REAL_EQ(setSimd4RealFrom3R(1, 1, 3), gmx_simd4_min_r(rSimd4_1_2_3, rSimd4_3_1_4));
156 GMX_EXPECT_SIMD4_REAL_EQ(setSimd4RealFrom3R(1, 1, 3), gmx_simd4_min_r(rSimd4_3_1_4, rSimd4_1_2_3));
157 GMX_EXPECT_SIMD4_REAL_EQ(setSimd4RealFrom3R(-3, -2, -4), gmx_simd4_min_r(rSimd4_m1_m2_m3, rSimd4_m3_m1_m4));
158 GMX_EXPECT_SIMD4_REAL_EQ(setSimd4RealFrom3R(-3, -2, -4), gmx_simd4_min_r(rSimd4_m3_m1_m4, rSimd4_m1_m2_m3));
161 TEST_F(Simd4FloatingpointTest, gmxSimd4RoundR)
163 GMX_EXPECT_SIMD4_REAL_EQ(setSimd4RealFrom1R(2), gmx_simd4_round_r(gmx_simd4_set1_r(2.25)));
164 GMX_EXPECT_SIMD4_REAL_EQ(setSimd4RealFrom1R(4), gmx_simd4_round_r(gmx_simd4_set1_r(3.75)));
165 GMX_EXPECT_SIMD4_REAL_EQ(setSimd4RealFrom1R(-2), gmx_simd4_round_r(gmx_simd4_set1_r(-2.25)));
166 GMX_EXPECT_SIMD4_REAL_EQ(setSimd4RealFrom1R(-4), gmx_simd4_round_r(gmx_simd4_set1_r(-3.75)));
169 TEST_F(Simd4FloatingpointTest, gmxSimd4TruncR)
171 GMX_EXPECT_SIMD4_REAL_EQ(setSimd4RealFrom1R(2), gmx_simd4_trunc_r(rSimd4_2p25));
172 GMX_EXPECT_SIMD4_REAL_EQ(setSimd4RealFrom1R(3), gmx_simd4_trunc_r(rSimd4_3p75));
173 GMX_EXPECT_SIMD4_REAL_EQ(setSimd4RealFrom1R(-2), gmx_simd4_trunc_r(rSimd4_m2p25));
174 GMX_EXPECT_SIMD4_REAL_EQ(setSimd4RealFrom1R(-3), gmx_simd4_trunc_r(rSimd4_m3p75));
177 /* We do extensive 1/sqrt(x) and 1/x accuracy testing in the tests for
178 * the SIMD math functions, so we just make sure the lookup instructions
179 * appear to work for a few values here.
181 TEST_F(Simd4FloatingpointTest, gmxSimd4RsqrtR)
183 gmx_simd4_real_t x = setSimd4RealFrom3R(4.0, M_PI, 1234567890.0);
184 gmx_simd4_real_t ref = setSimd4RealFrom3R(0.5, 1.0/sqrt(M_PI), 1.0/sqrt(1234567890.0));
186 // The allowed Ulp deviation is 2 to the power of the number of mantissa
187 // digits, minus the number of bits provided by the table lookup
188 setUlpTol(1LL << (std::numeric_limits<real>::digits-GMX_SIMD_RSQRT_BITS));
189 GMX_EXPECT_SIMD4_REAL_NEAR(ref, gmx_simd4_rsqrt_r(x));
192 TEST_F(Simd4FloatingpointTest, gmxSimd4BoolCmpEqAndBlendZeroR)
194 gmx_simd4_bool_t eq = gmx_simd4_cmpeq_r(rSimd4_5_7_9, rSimd4_7_8_9);
195 GMX_EXPECT_SIMD4_REAL_EQ(setSimd4RealFrom3R(0, 0, 3), gmx_simd4_blendzero_r(rSimd4_1_2_3, eq));
198 TEST_F(Simd4FloatingpointTest, gmxSimd4BlendNotZeroR)
200 gmx_simd4_bool_t eq = gmx_simd4_cmpeq_r(rSimd4_5_7_9, rSimd4_7_8_9);
201 GMX_EXPECT_SIMD4_REAL_EQ(setSimd4RealFrom3R(1, 2, 0), gmx_simd4_blendnotzero_r(rSimd4_1_2_3, eq));
204 TEST_F(Simd4FloatingpointTest, gmxSimd4BoolCmpLER)
206 gmx_simd4_bool_t le = gmx_simd4_cmple_r(rSimd4_5_7_9, rSimd4_7_8_9);
207 GMX_EXPECT_SIMD4_REAL_EQ(rSimd4_1_2_3, gmx_simd4_blendzero_r(rSimd4_1_2_3, le));
210 TEST_F(Simd4FloatingpointTest, gmxSimd4BoolCmpLTR)
212 gmx_simd4_bool_t lt = gmx_simd4_cmplt_r(rSimd4_5_7_9, rSimd4_7_8_9);
213 GMX_EXPECT_SIMD4_REAL_EQ(setSimd4RealFrom3R(1, 2, 0), gmx_simd4_blendzero_r(rSimd4_1_2_3, lt));
216 TEST_F(Simd4FloatingpointTest, gmxSimd4BoolAndB)
218 gmx_simd4_bool_t eq = gmx_simd4_cmpeq_r(rSimd4_5_7_9, rSimd4_7_8_9);
219 gmx_simd4_bool_t le = gmx_simd4_cmple_r(rSimd4_5_7_9, rSimd4_7_8_9);
220 GMX_EXPECT_SIMD4_REAL_EQ(setSimd4RealFrom3R(0, 0, 3), gmx_simd4_blendzero_r(rSimd4_1_2_3, gmx_simd4_and_b(eq, le)));
223 TEST_F(Simd4FloatingpointTest, gmxSimd4BoolOrB)
225 gmx_simd4_bool_t eq = gmx_simd4_cmpeq_r(rSimd4_5_7_9, rSimd4_7_8_9);
226 gmx_simd4_bool_t lt = gmx_simd4_cmplt_r(rSimd4_5_7_9, rSimd4_7_8_9);
227 GMX_EXPECT_SIMD4_REAL_EQ(setSimd4RealFrom3R(1, 2, 3), gmx_simd4_blendzero_r(rSimd4_1_2_3, gmx_simd4_or_b(eq, lt)));
230 TEST_F(Simd4FloatingpointTest, gmxSimd4AnytrueB)
234 /* this test is a bit tricky since we don't know the simd width.
235 * We cannot check for truth values for "any" element beyond the first,
236 * since that part of the data will not be used if simd width is 1.
238 eq = gmx_simd4_cmpeq_r(rSimd4_5_7_9, setSimd4RealFrom3R(5, 0, 0));
239 EXPECT_NE(0, gmx_simd4_anytrue_b(eq));
241 eq = gmx_simd4_cmpeq_r(rSimd4_1_2_3, rSimd4_4_5_6);
242 EXPECT_EQ(0, gmx_simd4_anytrue_b(eq));
245 TEST_F(Simd4FloatingpointTest, gmxSimd4BlendvR)
247 gmx_simd4_bool_t lt = gmx_simd4_cmplt_r(rSimd4_5_7_9, rSimd4_7_8_9);
248 GMX_EXPECT_SIMD4_REAL_EQ(setSimd4RealFrom3R(4, 5, 3), gmx_simd4_blendv_r(rSimd4_1_2_3, rSimd4_4_5_6, lt));
251 TEST_F(Simd4FloatingpointTest, gmxSimd4ReduceR)
253 // The horizontal sum of the SIMD variable depends on the width, so
254 // simply store it an extra time and calculate what the sum should be
255 std::vector<real> v = simd4Real2Vector(rSimd4_1_2_3);
258 for (int i = 0; i < GMX_SIMD4_WIDTH; i++)
263 EXPECT_EQ(sum, gmx_simd4_reduce_r(rSimd4_1_2_3));
267 TEST_F(Simd4FloatingpointTest, gmxSimd4Dotproduct3R)
269 gmx_simd4_real_t v1 = setSimd4RealFrom3R(1, 4, 5);
270 gmx_simd4_real_t v2 = setSimd4RealFrom3R(3, 8, 2);
272 EXPECT_DOUBLE_EQ(45.0, gmx_simd4_dotproduct3_r(v1, v2));
274 EXPECT_FLOAT_EQ(45.0, gmx_simd4_dotproduct3_r(v1, v2));
278 #endif // GMX_SIMD4_HAVE_REAL