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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),
107 SimdInt32(16384) * SimdInt32(16384)); // 16384*16384 = 268435456 (long mul)
110 # endif // GMX_SIMD_HAVE_INT32_ARITHMETICS
112 # if GMX_SIMD_HAVE_INT32_LOGICAL
113 TEST_F(SimdIntegerTest, and)
115 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(0xC0C0C0C0), iSimd_0xF0F0F0F0 & iSimd_0xCCCCCCCC);
118 TEST_F(SimdIntegerTest, andNot)
120 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(0x0C0C0C0C), andNot(iSimd_0xF0F0F0F0, iSimd_0xCCCCCCCC));
123 TEST_F(SimdIntegerTest, or)
125 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(0xFCFCFCFC), iSimd_0xF0F0F0F0 | iSimd_0xCCCCCCCC);
128 TEST_F(SimdIntegerTest, xor)
130 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(0x3C3C3C3C), iSimd_0xF0F0F0F0 ^ iSimd_0xCCCCCCCC);
132 # endif // GMX_SIMD_HAVE_INT32_LOGICAL
134 # if GMX_SIMD_HAVE_INT32_EXTRACT
135 TEST_F(SimdIntegerTest, extract)
137 alignas(GMX_SIMD_ALIGNMENT) std::int32_t idata[GMX_SIMD_REAL_WIDTH];
140 for (int i = 0; i < GMX_SIMD_REAL_WIDTH; i++)
144 simd = load<SimdInt32>(idata);
146 /* We cannot do a loop here, since
147 * - C++ gets confused about signed/unsigned if SSE macros are used in EXPECT_EQ()
148 * - Extract macros can only take immediates (not variables) on some archs,
149 * and some compilers are not smart enough to expand the for loop.
151 * To solve this we use a few values manually instead of a for-loop.
154 extracted_int = extract<0>(simd);
155 EXPECT_EQ(1, extracted_int);
156 # if GMX_SIMD_REAL_WIDTH >= 2
157 extracted_int = extract<1>(simd);
158 EXPECT_EQ(2, extracted_int);
160 # if GMX_SIMD_REAL_WIDTH >= 4
161 extracted_int = extract<3>(simd);
162 EXPECT_EQ(4, extracted_int);
164 # if GMX_SIMD_REAL_WIDTH >= 6
165 extracted_int = extract<5>(simd);
166 EXPECT_EQ(6, extracted_int);
168 # if GMX_SIMD_REAL_WIDTH >= 8
169 extracted_int = extract<7>(simd);
170 EXPECT_EQ(8, extracted_int);
173 # endif // GMX_SIMD_HAVE_INT32_EXTRACT
175 # if GMX_SIMD_HAVE_REAL
176 TEST_F(SimdIntegerTest, cvtR2I)
178 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(2), cvtR2I(rSimd_2p25));
179 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(-2), cvtR2I(rSimd_m2p25));
180 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(4), cvtR2I(rSimd_3p75));
181 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(-4), cvtR2I(rSimd_m3p75));
182 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(3), cvtR2I(rSimd_3p25));
183 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(-3), cvtR2I(rSimd_m3p25));
185 // Test multi-byte numbers
186 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(123457), cvtR2I(setSimdRealFrom1R(123456.7)));
187 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(-123457), cvtR2I(setSimdRealFrom1R(-123456.7)));
188 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(123456), cvtR2I(setSimdRealFrom1R(123456.3)));
189 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(-123456), cvtR2I(setSimdRealFrom1R(-123456.3)));
192 // Test number with more digits than we can represent in single.
193 // Note that our SIMD integers are only 32 bits, so we cannot go beyond that.
194 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(12345679), cvtR2I(setSimdRealFrom1R(12345678.6)));
195 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(-12345679), cvtR2I(setSimdRealFrom1R(-12345678.6)));
196 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(12345678), cvtR2I(setSimdRealFrom1R(12345678.3)));
197 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(-12345678), cvtR2I(setSimdRealFrom1R(-12345678.3)));
201 TEST_F(SimdIntegerTest, cvttR2I)
203 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(2), cvttR2I(rSimd_2p25));
204 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(-2), cvttR2I(rSimd_m2p25));
205 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(3), cvttR2I(rSimd_3p75));
206 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(-3), cvttR2I(rSimd_m3p75));
207 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(3), cvttR2I(rSimd_3p25));
208 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(-3), cvttR2I(rSimd_m3p25));
210 // Test multi-byte numbers
211 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(123456), cvttR2I(setSimdRealFrom1R(123456.7)));
212 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(-123456), cvttR2I(setSimdRealFrom1R(-123456.7)));
213 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(123456), cvttR2I(setSimdRealFrom1R(123456.3)));
214 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(-123456), cvttR2I(setSimdRealFrom1R(-123456.3)));
217 // Test number with more digits than we can represent in single.
218 // Note that our SIMD integers are only 32 bits, so we cannot go beyond that.
219 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(12345678), cvttR2I(setSimdRealFrom1R(12345678.6)));
220 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(-12345678), cvttR2I(setSimdRealFrom1R(-12345678.6)));
221 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(12345678), cvttR2I(setSimdRealFrom1R(12345678.3)));
222 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(-12345678), cvttR2I(setSimdRealFrom1R(-12345678.3)));
226 TEST_F(SimdIntegerTest, cvtI2R)
228 GMX_EXPECT_SIMD_REAL_EQ(setSimdRealFrom1R(2.0), cvtI2R(SimdInt32(2)));
229 GMX_EXPECT_SIMD_REAL_EQ(setSimdRealFrom1R(-2.0), cvtI2R(SimdInt32(-2)));
230 GMX_EXPECT_SIMD_REAL_EQ(setSimdRealFrom1R(102448689), cvtI2R(SimdInt32(102448689)));
231 GMX_EXPECT_SIMD_REAL_EQ(setSimdRealFrom1R(-102448689), cvtI2R(SimdInt32(-102448689)));
233 # endif // GMX_SIMD_HAVE_REAL
235 # if GMX_SIMD_HAVE_INT32_ARITHMETICS
236 TEST_F(SimdIntegerTest, cmpEqAndSelectMask)
238 SimdIBool eq = (iSimd_5_7_9 == iSimd_7_8_9);
239 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom3I(0, 0, 3), selectByMask(iSimd_1_2_3, eq));
242 TEST_F(SimdIntegerTest, cmpEqAndSelectNotMask)
244 SimdIBool eq = (iSimd_5_7_9 == iSimd_7_8_9);
245 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom3I(1, 2, 0), selectByNotMask(iSimd_1_2_3, eq));
248 TEST_F(SimdIntegerTest, cmpLt)
250 SimdIBool lt = (iSimd_5_7_9 < iSimd_7_8_9);
251 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom3I(1, 2, 0), selectByMask(iSimd_1_2_3, lt));
254 TEST_F(SimdIntegerTest, testBits)
256 SimdIBool eq = testBits(setSimdIntFrom3I(1, 0, 2));
257 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom3I(1, 0, 3), selectByMask(iSimd_1_2_3, eq));
259 // Test if we detect only the sign bit being set
260 eq = testBits(setSimdIntFrom1I(0x80000000));
261 GMX_EXPECT_SIMD_INT_EQ(iSimd_1_2_3, selectByMask(iSimd_1_2_3, eq));
264 TEST_F(SimdIntegerTest, andB)
266 SimdIBool eq1 = (iSimd_5_7_9 == iSimd_7_8_9);
267 SimdIBool eq2 = (iSimd_5_7_9 == iSimd_5_7_9);
268 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom3I(0, 0, 3), selectByMask(iSimd_1_2_3, eq1 && eq2));
271 TEST_F(SimdIntegerTest, orB)
273 SimdIBool eq1 = (iSimd_5_7_9 == iSimd_7_8_9);
274 SimdIBool eq2 = (iSimd_5_7_9 == setSimdIntFrom3I(5, 0, 0));
275 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom3I(1, 0, 3), selectByMask(iSimd_1_2_3, eq1 || eq2));
278 TEST_F(SimdIntegerTest, anyTrue)
280 alignas(GMX_SIMD_ALIGNMENT) std::array<std::int32_t, GMX_SIMD_REAL_WIDTH> mem{};
282 // Test the false case
283 EXPECT_FALSE(anyTrue(setZero() < load<SimdInt32>(mem.data())));
285 // Test each bit (these should all be true)
286 for (int i = 0; i < GMX_SIMD_REAL_WIDTH; i++)
290 EXPECT_TRUE(anyTrue(setZero() < load<SimdInt32>(mem.data())))
291 << "Not detecting true in element " << i;
295 TEST_F(SimdIntegerTest, blend)
297 SimdIBool lt = (iSimd_5_7_9 < iSimd_7_8_9);
298 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom3I(4, 5, 3), blend(iSimd_1_2_3, iSimd_4_5_6, lt));
300 # endif // GMX_SIMD_HAVE_INT32_ARITHMETICS
302 # if GMX_SIMD_HAVE_REAL && GMX_SIMD_HAVE_INT32_ARITHMETICS
303 TEST_F(SimdIntegerTest, cvtB2IB)
305 SimdBool eq = (rSimd_c3c4c5 == rSimd_c3c0c4); // eq should be T,F,F
306 SimdIBool eqi = cvtB2IB(eq);
307 GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom3I(1, 0, 0), selectByMask(iSimd_1_2_3, eqi));
310 TEST_F(SimdIntegerTest, cvtIB2B)
312 SimdIBool eqi = (iSimd_5_7_9 == setSimdIntFrom3I(5, 0, 0)); // eq should be T,F,F
313 SimdBool eq = cvtIB2B(eqi);
314 GMX_EXPECT_SIMD_REAL_EQ(setSimdRealFrom3R(c0, 0, 0), selectByMask(rSimd_c0c1c2, eq));
316 # endif // GMX_SIMD_HAVE_REAL && GMX_SIMD_HAVE_INT32_ARITHMETICS