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

   1 // RUN: %clang_builtins %s %librt -lm -o %t && %run %t
   2 // REQUIRES: librt_has_divsc3
   3 //===-- divsc3_test.c - Test __divsc3 -------------------------------------===//
   4 //
   5 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   6 // See https://llvm.org/LICENSE.txt for license information.
   7 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   8 //
   9 //===----------------------------------------------------------------------===//
  10 //
  11 // This file tests __divsc3 for the compiler_rt library.
  12 //
  13 //===----------------------------------------------------------------------===//
  14
  15 #include "int_lib.h"
  16 #include <math.h>
  17 #include <complex.h>
  18 #include <stdio.h>
  19
  20 // REQUIRES: c99-complex
  21
  22 // Returns: the quotient of (a + ib) / (c + id)
  23
  24 COMPILER_RT_ABI float _Complex
  25 __divsc3(float __a, float __b, float __c, float __d);
  26
  27 enum {zero, non_zero, inf, NaN, non_zero_nan};
  28
  29 int
  30 classify(float _Complex x)
  31 {
  32     if (x == 0)
  33         return zero;
  34     if (isinf(crealf(x)) || isinf(cimagf(x)))
  35         return inf;
  36     if (isnan(crealf(x)) && isnan(cimagf(x)))
  37         return NaN;
  38     if (isnan(crealf(x)))
  39     {
  40         if (cimagf(x) == 0)
  41             return NaN;
  42         return non_zero_nan;
  43     }
  44     if (isnan(cimagf(x)))
  45     {
  46         if (crealf(x) == 0)
  47             return NaN;
  48         return non_zero_nan;
  49     }
  50     return non_zero;
  51 }
  52
  53 int test__divsc3(float a, float b, float c, float d)
  54 {
  55     float _Complex r = __divsc3(a, b, c, d);
  56 //     printf("test__divsc3(%f, %f, %f, %f) = %f + I%f\n",
  57 //             a, b, c, d, crealf(r), cimagf(r));
  58         float _Complex dividend;
  59         float _Complex divisor;
  60
  61         __real__ dividend = a;
  62         __imag__ dividend = b;
  63         __real__ divisor = c;
  64         __imag__ divisor = d;
  65
  66     switch (classify(dividend))
  67     {
  68     case zero:
  69         switch (classify(divisor))
  70         {
  71         case zero:
  72             if (classify(r) != NaN)
  73                 return 1;
  74             break;
  75         case non_zero:
  76             if (classify(r) != zero)
  77                 return 1;
  78             break;
  79         case inf:
  80             if (classify(r) != zero)
  81                 return 1;
  82             break;
  83         case NaN:
  84             if (classify(r) != NaN)
  85                 return 1;
  86             break;
  87         case non_zero_nan:
  88             if (classify(r) != NaN)
  89                 return 1;
  90             break;
  91         }
  92         break;
  93     case non_zero:
  94         switch (classify(divisor))
  95         {
  96         case zero:
  97             if (classify(r) != inf)
  98                 return 1;
  99             break;
 100         case non_zero:
 101             if (classify(r) != non_zero)
 102                 return 1;
 103             {
 104             float _Complex z = (a * c + b * d) / (c * c + d * d)
 105                              + (b * c - a * d) / (c * c + d * d) * _Complex_I;
 106             if (cabsf((r-z)/r) > 1.e-6)
 107                 return 1;
 108             }
 109             break;
 110         case inf:
 111             if (classify(r) != zero)
 112                 return 1;
 113             break;
 114         case NaN:
 115             if (classify(r) != NaN)
 116                 return 1;
 117             break;
 118         case non_zero_nan:
 119             if (classify(r) != NaN)
 120                 return 1;
 121             break;
 122         }
 123         break;
 124     case inf:
 125         switch (classify(divisor))
 126         {
 127         case zero:
 128             if (classify(r) != inf)
 129                 return 1;
 130             break;
 131         case non_zero:
 132             if (classify(r) != inf)
 133                 return 1;
 134             break;
 135         case inf:
 136             if (classify(r) != NaN)
 137                 return 1;
 138             break;
 139         case NaN:
 140             if (classify(r) != NaN)
 141                 return 1;
 142             break;
 143         case non_zero_nan:
 144             if (classify(r) != NaN)
 145                 return 1;
 146             break;
 147         }
 148         break;
 149     case NaN:
 150         switch (classify(divisor))
 151         {
 152         case zero:
 153             if (classify(r) != NaN)
 154                 return 1;
 155             break;
 156         case non_zero:
 157             if (classify(r) != NaN)
 158                 return 1;
 159             break;
 160         case inf:
 161             if (classify(r) != NaN)
 162                 return 1;
 163             break;
 164         case NaN:
 165             if (classify(r) != NaN)
 166                 return 1;
 167             break;
 168         case non_zero_nan:
 169             if (classify(r) != NaN)
 170                 return 1;
 171             break;
 172         }
 173         break;
 174     case non_zero_nan:
 175         switch (classify(divisor))
 176         {
 177         case zero:
 178             if (classify(r) != inf)
 179                 return 1;
 180             break;
 181         case non_zero:
 182             if (classify(r) != NaN)
 183                 return 1;
 184             break;
 185         case inf:
 186             if (classify(r) != NaN)
 187                 return 1;
 188             break;
 189         case NaN:
 190             if (classify(r) != NaN)
 191                 return 1;
 192             break;
 193         case non_zero_nan:
 194             if (classify(r) != NaN)
 195                 return 1;
 196             break;
 197         }
 198         break;
 199     }
 200
 201     return 0;
 202 }
 203
 204 float x[][2] =
 205 {
 206     { 1.e-6,  1.e-6},
 207     {-1.e-6,  1.e-6},
 208     {-1.e-6, -1.e-6},
 209     { 1.e-6, -1.e-6},
 210
 211     { 1.e+6,  1.e-6},
 212     {-1.e+6,  1.e-6},
 213     {-1.e+6, -1.e-6},
 214     { 1.e+6, -1.e-6},
 215
 216     { 1.e-6,  1.e+6},
 217     {-1.e-6,  1.e+6},
 218     {-1.e-6, -1.e+6},
 219     { 1.e-6, -1.e+6},
 220
 221     { 1.e+6,  1.e+6},
 222     {-1.e+6,  1.e+6},
 223     {-1.e+6, -1.e+6},
 224     { 1.e+6, -1.e+6},
 225
 226     {NAN, NAN},
 227     {-INFINITY, NAN},
 228     {-2, NAN},
 229     {-1, NAN},
 230     {-0.5, NAN},
 231     {-0., NAN},
 232     {+0., NAN},
 233     {0.5, NAN},
 234     {1, NAN},
 235     {2, NAN},
 236     {INFINITY, NAN},
 237
 238     {NAN, -INFINITY},
 239     {-INFINITY, -INFINITY},
 240     {-2, -INFINITY},
 241     {-1, -INFINITY},
 242     {-0.5, -INFINITY},
 243     {-0., -INFINITY},
 244     {+0., -INFINITY},
 245     {0.5, -INFINITY},
 246     {1, -INFINITY},
 247     {2, -INFINITY},
 248     {INFINITY, -INFINITY},
 249
 250     {NAN, -2},
 251     {-INFINITY, -2},
 252     {-2, -2},
 253     {-1, -2},
 254     {-0.5, -2},
 255     {-0., -2},
 256     {+0., -2},
 257     {0.5, -2},
 258     {1, -2},
 259     {2, -2},
 260     {INFINITY, -2},
 261
 262     {NAN, -1},
 263     {-INFINITY, -1},
 264     {-2, -1},
 265     {-1, -1},
 266     {-0.5, -1},
 267     {-0., -1},
 268     {+0., -1},
 269     {0.5, -1},
 270     {1, -1},
 271     {2, -1},
 272     {INFINITY, -1},
 273
 274     {NAN, -0.5},
 275     {-INFINITY, -0.5},
 276     {-2, -0.5},
 277     {-1, -0.5},
 278     {-0.5, -0.5},
 279     {-0., -0.5},
 280     {+0., -0.5},
 281     {0.5, -0.5},
 282     {1, -0.5},
 283     {2, -0.5},
 284     {INFINITY, -0.5},
 285
 286     {NAN, -0.},
 287     {-INFINITY, -0.},
 288     {-2, -0.},
 289     {-1, -0.},
 290     {-0.5, -0.},
 291     {-0., -0.},
 292     {+0., -0.},
 293     {0.5, -0.},
 294     {1, -0.},
 295     {2, -0.},
 296     {INFINITY, -0.},
 297
 298     {NAN, 0.},
 299     {-INFINITY, 0.},
 300     {-2, 0.},
 301     {-1, 0.},
 302     {-0.5, 0.},
 303     {-0., 0.},
 304     {+0., 0.},
 305     {0.5, 0.},
 306     {1, 0.},
 307     {2, 0.},
 308     {INFINITY, 0.},
 309
 310     {NAN, 0.5},
 311     {-INFINITY, 0.5},
 312     {-2, 0.5},
 313     {-1, 0.5},
 314     {-0.5, 0.5},
 315     {-0., 0.5},
 316     {+0., 0.5},
 317     {0.5, 0.5},
 318     {1, 0.5},
 319     {2, 0.5},
 320     {INFINITY, 0.5},
 321
 322     {NAN, 1},
 323     {-INFINITY, 1},
 324     {-2, 1},
 325     {-1, 1},
 326     {-0.5, 1},
 327     {-0., 1},
 328     {+0., 1},
 329     {0.5, 1},
 330     {1, 1},
 331     {2, 1},
 332     {INFINITY, 1},
 333
 334     {NAN, 2},
 335     {-INFINITY, 2},
 336     {-2, 2},
 337     {-1, 2},
 338     {-0.5, 2},
 339     {-0., 2},
 340     {+0., 2},
 341     {0.5, 2},
 342     {1, 2},
 343     {2, 2},
 344     {INFINITY, 2},
 345
 346     {NAN, INFINITY},
 347     {-INFINITY, INFINITY},
 348     {-2, INFINITY},
 349     {-1, INFINITY},
 350     {-0.5, INFINITY},
 351     {-0., INFINITY},
 352     {+0., INFINITY},
 353     {0.5, INFINITY},
 354     {1, INFINITY},
 355     {2, INFINITY},
 356     {INFINITY, INFINITY}
 357
 358 };
 359
 360 int main()
 361 {
 362     const unsigned N = sizeof(x) / sizeof(x[0]);
 363     unsigned i, j;
 364     for (i = 0; i < N; ++i)
 365     {
 366         for (j = 0; j < N; ++j)
 367         {
 368             if (test__divsc3(x[i][0], x[i][1], x[j][0], x[j][1]))
 369                 return 1;
 370         }
 371     }
 372
 373     return 0;
 374 }