src/compiler-rt/test/builtins/Unit/divsc3_test.c

   1 //===-- divsc3_test.c - Test __divsc3 -------------------------------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is dual licensed under the MIT and the University of Illinois Open
   6 // Source Licenses. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // This file tests __divsc3 for the compiler_rt library.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "int_lib.h"
  15 #include <math.h>
  16 #include <complex.h>
  17 #include <stdio.h>
  18
  19 // Returns: the quotient of (a + ib) / (c + id)
  20
  21 COMPILER_RT_ABI float _Complex
  22 __divsc3(float __a, float __b, float __c, float __d);
  23
  24 enum {zero, non_zero, inf, NaN, non_zero_nan};
  25
  26 int
  27 classify(float _Complex x)
  28 {
  29     if (x == 0)
  30         return zero;
  31     if (isinf(crealf(x)) || isinf(cimagf(x)))
  32         return inf;
  33     if (isnan(crealf(x)) && isnan(cimagf(x)))
  34         return NaN;
  35     if (isnan(crealf(x)))
  36     {
  37         if (cimagf(x) == 0)
  38             return NaN;
  39         return non_zero_nan;
  40     }
  41     if (isnan(cimagf(x)))
  42     {
  43         if (crealf(x) == 0)
  44             return NaN;
  45         return non_zero_nan;
  46     }
  47     return non_zero;
  48 }
  49
  50 int test__divsc3(float a, float b, float c, float d)
  51 {
  52     float _Complex r = __divsc3(a, b, c, d);
  53 //     printf("test__divsc3(%f, %f, %f, %f) = %f + I%f\n",
  54 //             a, b, c, d, crealf(r), cimagf(r));
  55         float _Complex dividend;
  56         float _Complex divisor;
  57
  58         __real__ dividend = a;
  59         __imag__ dividend = b;
  60         __real__ divisor = c;
  61         __imag__ divisor = d;
  62
  63     switch (classify(dividend))
  64     {
  65     case zero:
  66         switch (classify(divisor))
  67         {
  68         case zero:
  69             if (classify(r) != NaN)
  70                 return 1;
  71             break;
  72         case non_zero:
  73             if (classify(r) != zero)
  74                 return 1;
  75             break;
  76         case inf:
  77             if (classify(r) != zero)
  78                 return 1;
  79             break;
  80         case NaN:
  81             if (classify(r) != NaN)
  82                 return 1;
  83             break;
  84         case non_zero_nan:
  85             if (classify(r) != NaN)
  86                 return 1;
  87             break;
  88         }
  89         break;
  90     case non_zero:
  91         switch (classify(divisor))
  92         {
  93         case zero:
  94             if (classify(r) != inf)
  95                 return 1;
  96             break;
  97         case non_zero:
  98             if (classify(r) != non_zero)
  99                 return 1;
 100             {
 101             float _Complex z = (a * c + b * d) / (c * c + d * d)
 102                              + (b * c - a * d) / (c * c + d * d) * _Complex_I;
 103             if (r != z)
 104                 return 1;
 105             }
 106             break;
 107         case inf:
 108             if (classify(r) != zero)
 109                 return 1;
 110             break;
 111         case NaN:
 112             if (classify(r) != NaN)
 113                 return 1;
 114             break;
 115         case non_zero_nan:
 116             if (classify(r) != NaN)
 117                 return 1;
 118             break;
 119         }
 120         break;
 121     case inf:
 122         switch (classify(divisor))
 123         {
 124         case zero:
 125             if (classify(r) != inf)
 126                 return 1;
 127             break;
 128         case non_zero:
 129             if (classify(r) != inf)
 130                 return 1;
 131             break;
 132         case inf:
 133             if (classify(r) != NaN)
 134                 return 1;
 135             break;
 136         case NaN:
 137             if (classify(r) != NaN)
 138                 return 1;
 139             break;
 140         case non_zero_nan:
 141             if (classify(r) != NaN)
 142                 return 1;
 143             break;
 144         }
 145         break;
 146     case NaN:
 147         switch (classify(divisor))
 148         {
 149         case zero:
 150             if (classify(r) != NaN)
 151                 return 1;
 152             break;
 153         case non_zero:
 154             if (classify(r) != NaN)
 155                 return 1;
 156             break;
 157         case inf:
 158             if (classify(r) != NaN)
 159                 return 1;
 160             break;
 161         case NaN:
 162             if (classify(r) != NaN)
 163                 return 1;
 164             break;
 165         case non_zero_nan:
 166             if (classify(r) != NaN)
 167                 return 1;
 168             break;
 169         }
 170         break;
 171     case non_zero_nan:
 172         switch (classify(divisor))
 173         {
 174         case zero:
 175             if (classify(r) != inf)
 176                 return 1;
 177             break;
 178         case non_zero:
 179             if (classify(r) != NaN)
 180                 return 1;
 181             break;
 182         case inf:
 183             if (classify(r) != NaN)
 184                 return 1;
 185             break;
 186         case NaN:
 187             if (classify(r) != NaN)
 188                 return 1;
 189             break;
 190         case non_zero_nan:
 191             if (classify(r) != NaN)
 192                 return 1;
 193             break;
 194         }
 195         break;
 196     }
 197
 198     return 0;
 199 }
 200
 201 float x[][2] =
 202 {
 203     { 1.e-6,  1.e-6},
 204     {-1.e-6,  1.e-6},
 205     {-1.e-6, -1.e-6},
 206     { 1.e-6, -1.e-6},
 207
 208     { 1.e+6,  1.e-6},
 209     {-1.e+6,  1.e-6},
 210     {-1.e+6, -1.e-6},
 211     { 1.e+6, -1.e-6},
 212
 213     { 1.e-6,  1.e+6},
 214     {-1.e-6,  1.e+6},
 215     {-1.e-6, -1.e+6},
 216     { 1.e-6, -1.e+6},
 217
 218     { 1.e+6,  1.e+6},
 219     {-1.e+6,  1.e+6},
 220     {-1.e+6, -1.e+6},
 221     { 1.e+6, -1.e+6},
 222
 223     {NAN, NAN},
 224     {-INFINITY, NAN},
 225     {-2, NAN},
 226     {-1, NAN},
 227     {-0.5, NAN},
 228     {-0., NAN},
 229     {+0., NAN},
 230     {0.5, NAN},
 231     {1, NAN},
 232     {2, NAN},
 233     {INFINITY, NAN},
 234
 235     {NAN, -INFINITY},
 236     {-INFINITY, -INFINITY},
 237     {-2, -INFINITY},
 238     {-1, -INFINITY},
 239     {-0.5, -INFINITY},
 240     {-0., -INFINITY},
 241     {+0., -INFINITY},
 242     {0.5, -INFINITY},
 243     {1, -INFINITY},
 244     {2, -INFINITY},
 245     {INFINITY, -INFINITY},
 246
 247     {NAN, -2},
 248     {-INFINITY, -2},
 249     {-2, -2},
 250     {-1, -2},
 251     {-0.5, -2},
 252     {-0., -2},
 253     {+0., -2},
 254     {0.5, -2},
 255     {1, -2},
 256     {2, -2},
 257     {INFINITY, -2},
 258
 259     {NAN, -1},
 260     {-INFINITY, -1},
 261     {-2, -1},
 262     {-1, -1},
 263     {-0.5, -1},
 264     {-0., -1},
 265     {+0., -1},
 266     {0.5, -1},
 267     {1, -1},
 268     {2, -1},
 269     {INFINITY, -1},
 270
 271     {NAN, -0.5},
 272     {-INFINITY, -0.5},
 273     {-2, -0.5},
 274     {-1, -0.5},
 275     {-0.5, -0.5},
 276     {-0., -0.5},
 277     {+0., -0.5},
 278     {0.5, -0.5},
 279     {1, -0.5},
 280     {2, -0.5},
 281     {INFINITY, -0.5},
 282
 283     {NAN, -0.},
 284     {-INFINITY, -0.},
 285     {-2, -0.},
 286     {-1, -0.},
 287     {-0.5, -0.},
 288     {-0., -0.},
 289     {+0., -0.},
 290     {0.5, -0.},
 291     {1, -0.},
 292     {2, -0.},
 293     {INFINITY, -0.},
 294
 295     {NAN, 0.},
 296     {-INFINITY, 0.},
 297     {-2, 0.},
 298     {-1, 0.},
 299     {-0.5, 0.},
 300     {-0., 0.},
 301     {+0., 0.},
 302     {0.5, 0.},
 303     {1, 0.},
 304     {2, 0.},
 305     {INFINITY, 0.},
 306
 307     {NAN, 0.5},
 308     {-INFINITY, 0.5},
 309     {-2, 0.5},
 310     {-1, 0.5},
 311     {-0.5, 0.5},
 312     {-0., 0.5},
 313     {+0., 0.5},
 314     {0.5, 0.5},
 315     {1, 0.5},
 316     {2, 0.5},
 317     {INFINITY, 0.5},
 318
 319     {NAN, 1},
 320     {-INFINITY, 1},
 321     {-2, 1},
 322     {-1, 1},
 323     {-0.5, 1},
 324     {-0., 1},
 325     {+0., 1},
 326     {0.5, 1},
 327     {1, 1},
 328     {2, 1},
 329     {INFINITY, 1},
 330
 331     {NAN, 2},
 332     {-INFINITY, 2},
 333     {-2, 2},
 334     {-1, 2},
 335     {-0.5, 2},
 336     {-0., 2},
 337     {+0., 2},
 338     {0.5, 2},
 339     {1, 2},
 340     {2, 2},
 341     {INFINITY, 2},
 342
 343     {NAN, INFINITY},
 344     {-INFINITY, INFINITY},
 345     {-2, INFINITY},
 346     {-1, INFINITY},
 347     {-0.5, INFINITY},
 348     {-0., INFINITY},
 349     {+0., INFINITY},
 350     {0.5, INFINITY},
 351     {1, INFINITY},
 352     {2, INFINITY},
 353     {INFINITY, INFINITY}
 354
 355 };
 356
 357 int main()
 358 {
 359     const unsigned N = sizeof(x) / sizeof(x[0]);
 360     unsigned i, j;
 361     for (i = 0; i < N; ++i)
 362     {
 363         for (j = 0; j < N; ++j)
 364         {
 365             if (test__divsc3(x[i][0], x[i][1], x[j][0], x[j][1]))
 366                 return 1;
 367         }
 368     }
 369
 370     return 0;
 371 }