src/gromacs/simd/tests/simd_integer.cpp

   1 /*
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  35 #include "gmxpre.h"
  36
  37 #include "gromacs/simd/simd.h"
  38 #include "gromacs/utility/basedefinitions.h"
  39
  40 #include "simd.h"
  41
  42 /* Some notes on the setup of these tests:
  43  *
  44  * It might seem strange to mix different instructions for "setting" SIMD
  45  * registers, but the difference is that the routines like setSimdIntFrom1I()
  46  * only use the load/store operations that we already test separately in
  47  * bootstrap_loadstore.cpp. Since these are "known good" if the bootstrap
  48  * tests pass, we use them to test the normal SIMD implementation instructions.
  49  */
  50
  51 #if GMX_SIMD
  52
  53 namespace gmx
  54 {
  55 namespace test
  56 {
  57 namespace
  58 {
  59
  60 /*! \cond internal */
  61 /*! \addtogroup module_simd */
  62 /*! \{ */
  63
  64 /*! \brief Test fixture for integer tests (identical to the generic \ref SimdTest) */
  65 typedef SimdTest SimdIntegerTest;
  66
  67 /* Yes, Virginia. We test for real even for integers. This is because we use
  68  * the floating-point type when no real integer SIMD type exists (which in turn
  69  * is because the results of real-to-integer conversions end up there). This
  70  * means the basic integer SIMD type is available whenever the real one is,
  71  * but depending on the precision selected that might not be the case.
  72  *
  73  * The second we have default-precision floating-point SIMD, we also have
  74  * the integer SIMD dataype and the most fundamental load/store ops.
  75  */
  76 #if GMX_SIMD_HAVE_REAL
  77
  78 TEST_F(SimdIntegerTest, setZero)
  79 {
  80     GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(0), setZero());
  81 }
  82 TEST_F(SimdIntegerTest, set)
  83 {
  84     GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(1), SimdInt32(1));
  85 }
  86 #endif      // GMX_SIMD_HAVE_REAL
  87
  88 #if GMX_SIMD_HAVE_INT32_ARITHMETICS
  89 TEST_F(SimdIntegerTest, add)
  90 {
  91     GMX_EXPECT_SIMD_INT_EQ(iSimd_5_7_9, iSimd_1_2_3 + iSimd_4_5_6 );         // short add
  92     GMX_EXPECT_SIMD_INT_EQ(iSimd_5M_7M_9M, iSimd_1M_2M_3M + iSimd_4M_5M_6M); // 32 bit add
  93 }
  94
  95 TEST_F(SimdIntegerTest, sub)
  96 {
  97     GMX_EXPECT_SIMD_INT_EQ(iSimd_1_2_3, iSimd_5_7_9 - iSimd_4_5_6 );          // short sub
  98     GMX_EXPECT_SIMD_INT_EQ(iSimd_1M_2M_3M, iSimd_5M_7M_9M - iSimd_4M_5M_6M ); // 32 bit sub
  99 }
 100
 101 TEST_F(SimdIntegerTest, mul)
 102 {
 103     GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom3I(4, 10, 18), iSimd_1_2_3 * iSimd_4_5_6);            // 2*3=6 (short mul)
 104     GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(268435456), SimdInt32(16384) * SimdInt32(16384) ); // 16384*16384 = 268435456 (long mul)
 105 }
 106
 107 TEST_F(SimdIntegerTest, slli)
 108 {
 109     GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(4194304), SimdInt32(2) << 21); // 2 << 21 = 4194304
 110 }
 111
 112 TEST_F(SimdIntegerTest, srli)
 113 {
 114     GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(4), SimdInt32(4194304) >> 20); // 4194304 >> 20 = 4
 115 }
 116 #endif                                                                     // GMX_SIMD_HAVE_INT32_ARITHMETICS
 117
 118 #if GMX_SIMD_HAVE_INT32_LOGICAL
 119 TEST_F(SimdIntegerTest, and)
 120 {
 121     GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(0xC0C0C0C0), iSimd_0xF0F0F0F0 & iSimd_0xCCCCCCCC);
 122 }
 123
 124 TEST_F(SimdIntegerTest, andNot)
 125 {
 126     GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(0x0C0C0C0C), andNot(iSimd_0xF0F0F0F0, iSimd_0xCCCCCCCC));
 127 }
 128
 129 TEST_F(SimdIntegerTest, or)
 130 {
 131     GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(0xFCFCFCFC), iSimd_0xF0F0F0F0 | iSimd_0xCCCCCCCC);
 132 }
 133
 134 TEST_F(SimdIntegerTest, xor)
 135 {
 136     GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(0x3C3C3C3C), iSimd_0xF0F0F0F0 ^iSimd_0xCCCCCCCC);
 137 }
 138 #endif      // GMX_SIMD_HAVE_INT32_LOGICAL
 139
 140 #if GMX_SIMD_HAVE_INT32_EXTRACT
 141 TEST_F(SimdIntegerTest, extract)
 142 {
 143     GMX_ALIGNED(int, GMX_SIMD_REAL_WIDTH)  idata[GMX_SIMD_REAL_WIDTH];
 144     SimdInt32 simd;
 145
 146     for (int i = 0; i < GMX_SIMD_REAL_WIDTH; i++)
 147     {
 148         idata[i] = i+1;
 149     }
 150     simd = load(idata);
 151
 152     /* We cannot do a loop here, since
 153      * - C++ gets confused about signed/unsigned if SSE macros are used in EXPECT_EQ()
 154      * - Extract macros can only take immediates (not variables) on some archs,
 155      *   and some compilers are not smart enough to expand the for loop.
 156      *
 157      * To solve this we use a few values manually instead of a for-loop.
 158      */
 159     int extracted_int;
 160     extracted_int = extract<0>(simd);
 161     EXPECT_EQ(1, extracted_int);
 162 #if GMX_SIMD_REAL_WIDTH >= 2
 163     extracted_int = extract<1>(simd);
 164     EXPECT_EQ(2, extracted_int);
 165 #endif
 166 #if GMX_SIMD_REAL_WIDTH >= 4
 167     extracted_int = extract<3>(simd);
 168     EXPECT_EQ(4, extracted_int);
 169 #endif
 170 #if GMX_SIMD_REAL_WIDTH >= 6
 171     extracted_int = extract<5>(simd);
 172     EXPECT_EQ(6, extracted_int);
 173 #endif
 174 #if GMX_SIMD_REAL_WIDTH >= 8
 175     extracted_int = extract<7>(simd);
 176     EXPECT_EQ(8, extracted_int);
 177 #endif
 178 }
 179 #endif      // GMX_SIMD_HAVE_INT32_EXTRACT
 180
 181 #if GMX_SIMD_HAVE_REAL
 182 TEST_F(SimdIntegerTest, cvtR2I)
 183 {
 184     GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(2), cvtR2I(rSimd_2p25));
 185     GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(-2), cvtR2I(rSimd_m2p25));
 186     GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(4), cvtR2I(rSimd_3p75));
 187     GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(-4), cvtR2I(rSimd_m3p75));
 188     GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(3), cvtR2I(rSimd_3p25));
 189     GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(-3), cvtR2I(rSimd_m3p25));
 190
 191     // Test multi-byte numbers
 192     GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(123457), cvtR2I(setSimdRealFrom1R(123456.7)));
 193     GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(-123457), cvtR2I(setSimdRealFrom1R(-123456.7)));
 194     GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(123456), cvtR2I(setSimdRealFrom1R(123456.3)));
 195     GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(-123456), cvtR2I(setSimdRealFrom1R(-123456.3)));
 196
 197 #if GMX_DOUBLE
 198     // Test number with more digits than we can represent in single.
 199     // Note that our SIMD integers are only 32 bits, so we cannot go beyond that.
 200     GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(12345679), cvtR2I(setSimdRealFrom1R(12345678.6)));
 201     GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(-12345679), cvtR2I(setSimdRealFrom1R(-12345678.6)));
 202     GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(12345678), cvtR2I(setSimdRealFrom1R(12345678.3)));
 203     GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(-12345678), cvtR2I(setSimdRealFrom1R(-12345678.3)));
 204 #endif
 205 }
 206
 207 TEST_F(SimdIntegerTest, cvttR2I)
 208 {
 209     GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(2), cvttR2I(rSimd_2p25));
 210     GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(-2), cvttR2I(rSimd_m2p25));
 211     GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(3), cvttR2I(rSimd_3p75));
 212     GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(-3), cvttR2I(rSimd_m3p75));
 213     GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(3), cvttR2I(rSimd_3p25));
 214     GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(-3), cvttR2I(rSimd_m3p25));
 215
 216     // Test multi-byte numbers
 217     GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(123456), cvttR2I(setSimdRealFrom1R(123456.7)));
 218     GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(-123456), cvttR2I(setSimdRealFrom1R(-123456.7)));
 219     GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(123456), cvttR2I(setSimdRealFrom1R(123456.3)));
 220     GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(-123456), cvttR2I(setSimdRealFrom1R(-123456.3)));
 221
 222 #if GMX_DOUBLE
 223     // Test number with more digits than we can represent in single.
 224     // Note that our SIMD integers are only 32 bits, so we cannot go beyond that.
 225     GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(12345678), cvttR2I(setSimdRealFrom1R(12345678.6)));
 226     GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(-12345678), cvttR2I(setSimdRealFrom1R(-12345678.6)));
 227     GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(12345678), cvttR2I(setSimdRealFrom1R(12345678.3)));
 228     GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom1I(-12345678), cvttR2I(setSimdRealFrom1R(-12345678.3)));
 229 #endif
 230 }
 231
 232 TEST_F(SimdIntegerTest, cvtI2R)
 233 {
 234     GMX_EXPECT_SIMD_REAL_EQ(setSimdRealFrom1R(2.0), cvtI2R(SimdInt32(2)));
 235     GMX_EXPECT_SIMD_REAL_EQ(setSimdRealFrom1R(-2.0), cvtI2R(SimdInt32(-2)));
 236     GMX_EXPECT_SIMD_REAL_EQ(setSimdRealFrom1R(102448689), cvtI2R(SimdInt32(102448689)));
 237     GMX_EXPECT_SIMD_REAL_EQ(setSimdRealFrom1R(-102448689), cvtI2R(SimdInt32(-102448689)));
 238 }
 239 #endif      // GMX_SIMD_HAVE_REAL
 240
 241 #if GMX_SIMD_HAVE_INT32_ARITHMETICS
 242 TEST_F(SimdIntegerTest, cmpEqAndSelectMask)
 243 {
 244     SimdIBool eq   = (iSimd_5_7_9 == iSimd_7_8_9);
 245     GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom3I(0, 0, 3), selectByMask(iSimd_1_2_3, eq));
 246 }
 247
 248 TEST_F(SimdIntegerTest, cmpEqAndSelectNotMask)
 249 {
 250     SimdIBool eq   = (iSimd_5_7_9 == iSimd_7_8_9);
 251     GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom3I(1, 2, 0), selectByNotMask(iSimd_1_2_3, eq));
 252 }
 253
 254 TEST_F(SimdIntegerTest, cmpLt)
 255 {
 256     SimdIBool lt   = (iSimd_5_7_9 < iSimd_7_8_9);
 257     GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom3I(1, 2, 0), selectByMask(iSimd_1_2_3, lt));
 258 }
 259
 260 TEST_F(SimdIntegerTest, testBits)
 261 {
 262     SimdIBool eq   = testBits(setSimdIntFrom3I(1, 0, 2));
 263     GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom3I(1, 0, 3), selectByMask(iSimd_1_2_3, eq));
 264
 265     // Test if we detect only the sign bit being set
 266     eq            = testBits(setSimdIntFrom1I(0x80000000));
 267     GMX_EXPECT_SIMD_INT_EQ(iSimd_1_2_3, selectByMask(iSimd_1_2_3, eq));
 268 }
 269
 270 TEST_F(SimdIntegerTest, andB)
 271 {
 272     SimdIBool eq1  = (iSimd_5_7_9 == iSimd_7_8_9);
 273     SimdIBool eq2  = (iSimd_5_7_9 == iSimd_5_7_9);
 274     GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom3I(0, 0, 3), selectByMask(iSimd_1_2_3, eq1 && eq2));
 275 }
 276
 277 TEST_F(SimdIntegerTest, orB)
 278 {
 279     SimdIBool eq1  = (iSimd_5_7_9 == iSimd_7_8_9);
 280     SimdIBool eq2  = (iSimd_5_7_9 == setSimdIntFrom3I(5, 0, 0));
 281     GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom3I(1, 0, 3), selectByMask(iSimd_1_2_3, eq1 || eq2));
 282 }
 283
 284 TEST_F(SimdIntegerTest, anyTrue)
 285 {
 286     SimdIBool eq;
 287
 288     /* See comment in floatingpoint.cpp. We should only check the first element here,
 289      * since the SIMD width could be 1 as a special case.
 290      */
 291     eq = (iSimd_5_7_9 == setSimdIntFrom3I(5, 0, 0));
 292     EXPECT_TRUE(anyTrue(eq));
 293
 294     eq = (iSimd_1_2_3 == iSimd_4_5_6);
 295     EXPECT_FALSE(anyTrue(eq));
 296 }
 297
 298 TEST_F(SimdIntegerTest, blend)
 299 {
 300     SimdIBool lt   = (iSimd_5_7_9 < iSimd_7_8_9);
 301     GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom3I(4, 5, 3), blend(iSimd_1_2_3, iSimd_4_5_6, lt));
 302 }
 303 #endif      // GMX_SIMD_HAVE_INT32_ARITHMETICS
 304
 305 #if GMX_SIMD_HAVE_REAL && GMX_SIMD_HAVE_INT32_ARITHMETICS
 306 TEST_F(SimdIntegerTest, cvtB2IB)
 307 {
 308     SimdBool  eq   = (rSimd_c3c4c5 == rSimd_c3c0c4);  // eq should be T,F,F
 309     SimdIBool eqi  = cvtB2IB(eq);
 310     GMX_EXPECT_SIMD_INT_EQ(setSimdIntFrom3I(1, 0, 0), selectByMask(iSimd_1_2_3, eqi));
 311
 312 }
 313
 314 TEST_F(SimdIntegerTest, cvtIB2B)
 315 {
 316     SimdIBool eqi  = (iSimd_5_7_9 == setSimdIntFrom3I(5, 0, 0));  // eq should be T,F,F
 317     SimdBool  eq   = cvtIB2B(eqi);
 318     GMX_EXPECT_SIMD_REAL_EQ(setSimdRealFrom3R(c0, 0, 0), selectByMask(rSimd_c0c1c2, eq));
 319 }
 320 #endif      // GMX_SIMD_HAVE_REAL && GMX_SIMD_HAVE_INT32_ARITHMETICS
 321
 322 /*! \} */
 323 /*! \endcond */
 324
 325 }      // namespace
 326 }      // namespace
 327 }      // namespace
 328
 329 #endif // GMX_SIMD