git.ozlabs.org Git - ccan/blob - ccan/tally/test/run-divlu64.c

   1 #include <ccan/tally/tally.c>
   2 #include <ccan/tap/tap.h>
   3
   4 int main(void)
   5 {
   6         unsigned int i, j;
   7
   8         plan_tests(5985);
   9         /* Simple tests. */
  10         for (i = 0; i < 127; i++) {
  11                 uint64_t u1, u0;
  12                 if (i < 64) {
  13                         u1 = 0;
  14                         u0 = 1ULL << i;
  15                         j = 0;
  16                 } else {
  17                         u1 = 1ULL << (i - 64);
  18                         u0 = 0;
  19                         j = i - 63;
  20                 }
  21                 for (; j < 63; j++) {
  22                         uint64_t answer;
  23                         if (j > i)
  24                                 answer = 0;
  25                         else
  26                                 answer = 1ULL << (i - j);
  27                         ok1(divlu64(u1, u0, 1ULL << j) == answer);
  28                 }
  29         }
  30         return exit_status();
  31 }