2 * This file is part of the GROMACS molecular simulation package.
4 * Copyright (c) 2014,2015,2016,2017,2018, by the GROMACS development team, led by
5 * Mark Abraham, David van der Spoel, Berk Hess, and Erik Lindahl,
6 * and including many others, as listed in the AUTHORS file in the
7 * top-level source directory and at http://www.gromacs.org.
9 * GROMACS is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public License
11 * as published by the Free Software Foundation; either version 2.1
12 * of the License, or (at your option) any later version.
14 * GROMACS is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with GROMACS; if not, see
21 * http://www.gnu.org/licenses, or write to the Free Software Foundation,
22 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
24 * If you want to redistribute modifications to GROMACS, please
25 * consider that scientific software is very special. Version
26 * control is crucial - bugs must be traceable. We will be happy to
27 * consider code for inclusion in the official distribution, but
28 * derived work must not be called official GROMACS. Details are found
29 * in the README & COPYING files - if they are missing, get the
30 * official version at http://www.gromacs.org.
32 * To help us fund GROMACS development, we humbly ask that you cite
33 * the research papers on the package. Check out http://www.gromacs.org.
39 #include "gromacs/simd/simd.h"
40 #include "gromacs/utility/basedefinitions.h"
44 /* Some notes on the setup of these tests:
46 * It might seem strange to mix different instructions for "setting" SIMD
47 * registers, but the difference is that the routines like setSimdIntFrom1I()
48 * only use the load/store operations that we already test separately in
49 * bootstrap_loadstore.cpp. Since these are "known good" if the bootstrap
50 * tests pass, we use them to test the normal SIMD implementation instructions.
63 /*! \addtogroup module_simd */
66 /*! \brief Test fixture for integer tests (identical to the generic \ref SimdTest) */
67 typedef SimdTest SimdIntegerTest;
69 /* Yes, Virginia. We test for real even for integers. This is because we use
70 * the floating-point type when no real integer SIMD type exists (which in turn
71 * is because the results of real-to-integer conversions end up there). This
72 * means the basic integer SIMD type is available whenever the real one is,
73 * but depending on the precision selected that might not be the case.
75 * The second we have default-precision floating-point SIMD, we also have
76 * the integer SIMD dataype and the most fundamental load/store ops.
78 #if GMX_SIMD_HAVE_REAL
80 TEST_F(SimdIntegerTest, setZero)
82 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(0), setZero());
84 TEST_F(SimdIntegerTest, set)
86 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(1), SimdInt32(1));
88 #endif // GMX_SIMD_HAVE_REAL
90 #if GMX_SIMD_HAVE_INT32_ARITHMETICS
91 TEST_F(SimdIntegerTest, add)
93 GMX_EXPECT_SIMD_INT_EQ(iSimd_5_7_9, iSimd_1_2_3 + iSimd_4_5_6 ); // short add
94 GMX_EXPECT_SIMD_INT_EQ(iSimd_5M_7M_9M, iSimd_1M_2M_3M + iSimd_4M_5M_6M); // 32 bit add
97 TEST_F(SimdIntegerTest, sub)
99 GMX_EXPECT_SIMD_INT_EQ(iSimd_1_2_3, iSimd_5_7_9 - iSimd_4_5_6 ); // short sub
100 GMX_EXPECT_SIMD_INT_EQ(iSimd_1M_2M_3M, iSimd_5M_7M_9M - iSimd_4M_5M_6M ); // 32 bit sub
103 TEST_F(SimdIntegerTest, mul)
105 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom3I(4, 10, 18), iSimd_1_2_3 * iSimd_4_5_6); // 2*3=6 (short mul)
106 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(268435456), SimdInt32(16384) * SimdInt32(16384) ); // 16384*16384 = 268435456 (long mul)
109 #endif // GMX_SIMD_HAVE_INT32_ARITHMETICS
111 #if GMX_SIMD_HAVE_INT32_LOGICAL
112 TEST_F(SimdIntegerTest, and)
114 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(0xC0C0C0C0), iSimd_0xF0F0F0F0 & iSimd_0xCCCCCCCC);
117 TEST_F(SimdIntegerTest, andNot)
119 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(0x0C0C0C0C), andNot(iSimd_0xF0F0F0F0, iSimd_0xCCCCCCCC));
122 TEST_F(SimdIntegerTest, or)
124 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(0xFCFCFCFC), iSimd_0xF0F0F0F0 | iSimd_0xCCCCCCCC);
127 TEST_F(SimdIntegerTest, xor)
129 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(0x3C3C3C3C), iSimd_0xF0F0F0F0 ^iSimd_0xCCCCCCCC);
131 #endif // GMX_SIMD_HAVE_INT32_LOGICAL
133 #if GMX_SIMD_HAVE_INT32_EXTRACT
134 TEST_F(SimdIntegerTest, extract)
136 alignas(GMX_SIMD_ALIGNMENT) std::int32_t idata[GMX_SIMD_REAL_WIDTH];
139 for (int i = 0; i < GMX_SIMD_REAL_WIDTH; i++)
143 simd = load<SimdInt32>(idata);
145 /* We cannot do a loop here, since
146 * - C++ gets confused about signed/unsigned if SSE macros are used in EXPECT_EQ()
147 * - Extract macros can only take immediates (not variables) on some archs,
148 * and some compilers are not smart enough to expand the for loop.
150 * To solve this we use a few values manually instead of a for-loop.
153 extracted_int = extract<0>(simd);
154 EXPECT_EQ(1, extracted_int);
155 #if GMX_SIMD_REAL_WIDTH >= 2
156 extracted_int = extract<1>(simd);
157 EXPECT_EQ(2, extracted_int);
159 #if GMX_SIMD_REAL_WIDTH >= 4
160 extracted_int = extract<3>(simd);
161 EXPECT_EQ(4, extracted_int);
163 #if GMX_SIMD_REAL_WIDTH >= 6
164 extracted_int = extract<5>(simd);
165 EXPECT_EQ(6, extracted_int);
167 #if GMX_SIMD_REAL_WIDTH >= 8
168 extracted_int = extract<7>(simd);
169 EXPECT_EQ(8, extracted_int);
172 #endif // GMX_SIMD_HAVE_INT32_EXTRACT
174 #if GMX_SIMD_HAVE_REAL
175 TEST_F(SimdIntegerTest, cvtR2I)
177 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(2), cvtR2I(rSimd_2p25));
178 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(-2), cvtR2I(rSimd_m2p25));
179 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(4), cvtR2I(rSimd_3p75));
180 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(-4), cvtR2I(rSimd_m3p75));
181 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(3), cvtR2I(rSimd_3p25));
182 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(-3), cvtR2I(rSimd_m3p25));
184 // Test multi-byte numbers
185 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(123457), cvtR2I(setSimdRealFrom1R(123456.7)));
186 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(-123457), cvtR2I(setSimdRealFrom1R(-123456.7)));
187 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(123456), cvtR2I(setSimdRealFrom1R(123456.3)));
188 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(-123456), cvtR2I(setSimdRealFrom1R(-123456.3)));
191 // Test number with more digits than we can represent in single.
192 // Note that our SIMD integers are only 32 bits, so we cannot go beyond that.
193 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(12345679), cvtR2I(setSimdRealFrom1R(12345678.6)));
194 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(-12345679), cvtR2I(setSimdRealFrom1R(-12345678.6)));
195 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(12345678), cvtR2I(setSimdRealFrom1R(12345678.3)));
196 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(-12345678), cvtR2I(setSimdRealFrom1R(-12345678.3)));
200 TEST_F(SimdIntegerTest, cvttR2I)
202 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(2), cvttR2I(rSimd_2p25));
203 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(-2), cvttR2I(rSimd_m2p25));
204 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(3), cvttR2I(rSimd_3p75));
205 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(-3), cvttR2I(rSimd_m3p75));
206 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(3), cvttR2I(rSimd_3p25));
207 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(-3), cvttR2I(rSimd_m3p25));
209 // Test multi-byte numbers
210 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(123456), cvttR2I(setSimdRealFrom1R(123456.7)));
211 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(-123456), cvttR2I(setSimdRealFrom1R(-123456.7)));
212 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(123456), cvttR2I(setSimdRealFrom1R(123456.3)));
213 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(-123456), cvttR2I(setSimdRealFrom1R(-123456.3)));
216 // Test number with more digits than we can represent in single.
217 // Note that our SIMD integers are only 32 bits, so we cannot go beyond that.
218 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(12345678), cvttR2I(setSimdRealFrom1R(12345678.6)));
219 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(-12345678), cvttR2I(setSimdRealFrom1R(-12345678.6)));
220 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(12345678), cvttR2I(setSimdRealFrom1R(12345678.3)));
221 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(-12345678), cvttR2I(setSimdRealFrom1R(-12345678.3)));
225 TEST_F(SimdIntegerTest, cvtI2R)
227 GMX_EXPECT_SIMD_REAL_EQ(setSimdRealFrom1R(2.0), cvtI2R(SimdInt32(2)));
228 GMX_EXPECT_SIMD_REAL_EQ(setSimdRealFrom1R(-2.0), cvtI2R(SimdInt32(-2)));
229 GMX_EXPECT_SIMD_REAL_EQ(setSimdRealFrom1R(102448689), cvtI2R(SimdInt32(102448689)));
230 GMX_EXPECT_SIMD_REAL_EQ(setSimdRealFrom1R(-102448689), cvtI2R(SimdInt32(-102448689)));
232 #endif // GMX_SIMD_HAVE_REAL
234 #if GMX_SIMD_HAVE_INT32_ARITHMETICS
235 TEST_F(SimdIntegerTest, cmpEqAndSelectMask)
237 SimdIBool eq = (iSimd_5_7_9 == iSimd_7_8_9);
238 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom3I(0, 0, 3), selectByMask(iSimd_1_2_3, eq));
241 TEST_F(SimdIntegerTest, cmpEqAndSelectNotMask)
243 SimdIBool eq = (iSimd_5_7_9 == iSimd_7_8_9);
244 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom3I(1, 2, 0), selectByNotMask(iSimd_1_2_3, eq));
247 TEST_F(SimdIntegerTest, cmpLt)
249 SimdIBool lt = (iSimd_5_7_9 < iSimd_7_8_9);
250 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom3I(1, 2, 0), selectByMask(iSimd_1_2_3, lt));
253 TEST_F(SimdIntegerTest, testBits)
255 SimdIBool eq = testBits(setSimdIntFrom3I(1, 0, 2));
256 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom3I(1, 0, 3), selectByMask(iSimd_1_2_3, eq));
258 // Test if we detect only the sign bit being set
259 eq = testBits(setSimdIntFrom1I(0x80000000));
260 GMX_EXPECT_SIMD_INT_EQ(iSimd_1_2_3, selectByMask(iSimd_1_2_3, eq));
263 TEST_F(SimdIntegerTest, andB)
265 SimdIBool eq1 = (iSimd_5_7_9 == iSimd_7_8_9);
266 SimdIBool eq2 = (iSimd_5_7_9 == iSimd_5_7_9);
267 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom3I(0, 0, 3), selectByMask(iSimd_1_2_3, eq1 && eq2));
270 TEST_F(SimdIntegerTest, orB)
272 SimdIBool eq1 = (iSimd_5_7_9 == iSimd_7_8_9);
273 SimdIBool eq2 = (iSimd_5_7_9 == setSimdIntFrom3I(5, 0, 0));
274 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom3I(1, 0, 3), selectByMask(iSimd_1_2_3, eq1 || eq2));
277 TEST_F(SimdIntegerTest, anyTrue)
279 alignas(GMX_SIMD_ALIGNMENT) std::array<std::int32_t, GMX_SIMD_REAL_WIDTH> mem {};
281 // Test the false case
282 EXPECT_FALSE(anyTrue(setZero() < load<SimdInt32>(mem.data())));
284 // Test each bit (these should all be true)
285 for (int i = 0; i < GMX_SIMD_REAL_WIDTH; i++)
289 EXPECT_TRUE(anyTrue(setZero() < load<SimdInt32>(mem.data()))) << "Not detecting true in element " << i;
293 TEST_F(SimdIntegerTest, blend)
295 SimdIBool lt = (iSimd_5_7_9 < iSimd_7_8_9);
296 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom3I(4, 5, 3), blend(iSimd_1_2_3, iSimd_4_5_6, lt));
298 #endif // GMX_SIMD_HAVE_INT32_ARITHMETICS
300 #if GMX_SIMD_HAVE_REAL && GMX_SIMD_HAVE_INT32_ARITHMETICS
301 TEST_F(SimdIntegerTest, cvtB2IB)
303 SimdBool eq = (rSimd_c3c4c5 == rSimd_c3c0c4); // eq should be T,F,F
304 SimdIBool eqi = cvtB2IB(eq);
305 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom3I(1, 0, 0), selectByMask(iSimd_1_2_3, eqi));
309 TEST_F(SimdIntegerTest, cvtIB2B)
311 SimdIBool eqi = (iSimd_5_7_9 == setSimdIntFrom3I(5, 0, 0)); // eq should be T,F,F
312 SimdBool eq = cvtIB2B(eqi);
313 GMX_EXPECT_SIMD_REAL_EQ(setSimdRealFrom3R(c0, 0, 0), selectByMask(rSimd_c0c1c2, eq));
315 #endif // GMX_SIMD_HAVE_REAL && GMX_SIMD_HAVE_INT32_ARITHMETICS