sdcc/support/regression/tests/bitcounttrailing.c.in

   1 /* Test count trailing bits operations from stdbit.h
   2
   3    type: unsigned short, unsigned int, unsigned long, unsigned long long
   4  */
   5
   6 #include <testfwk.h>
   7
   8 #ifdef __SDCC // Todo: Enable for all C23 implementations
   9 #pragma std_c23
  10 #include <stdbit.h>
  11 #endif
  12
  13 #include <limits.h>
  14
  15 volatile {type} i;
  16
  17 void
  18 testTrailing(void)
  19 {
  20 #ifdef __SDCC // Todo: Enable for all C23 implementations
  21         i = 0x0;
  22         ASSERT (stdc_count_trailing_ones(i) == 0);
  23         ASSERT (stdc_count_trailing_zeros(i) == sizeof({type}) * CHAR_BIT);
  24
  25         i = 0x1;
  26         ASSERT (stdc_count_trailing_ones(i) == 1);
  27         ASSERT (stdc_count_trailing_zeros(i) == 0);
  28
  29         i = 0x2;
  30         ASSERT (stdc_count_trailing_ones(i) == 0);
  31         ASSERT (stdc_count_trailing_zeros(i) == 1);
  32
  33         i = 0x3;
  34         ASSERT (stdc_count_trailing_ones(i) == 2);
  35         ASSERT (stdc_count_trailing_zeros(i) == 0);
  36
  37         i = 0x7;
  38         ASSERT (stdc_count_trailing_ones(i) == 3);
  39         ASSERT (stdc_count_trailing_zeros(i) == 0);
  40
  41         i = 0x8;
  42         ASSERT (stdc_count_trailing_ones(i) == 0);
  43         ASSERT (stdc_count_trailing_zeros(i) == 3);
  44
  45         i = 0x9;
  46         ASSERT (stdc_count_trailing_ones(i) == 1);
  47         ASSERT (stdc_count_trailing_zeros(i) == 0);
  48 #endif
  49 }
  50