sdcc/support/regression/tests/bug-2642.c

   1 /*
   2    bug-2342.c
   3  */
   4
   5 #include <testfwk.h>
   6
   7 #define VIO (*((volatile unsigned char *) 0x400))
   8
   9 void testBug(void)
  10 {
  11 #if defined(__SDCC_stm8) // only enabled for stm8, since 0x400 maybe a dangerous place on other ports
  12         VIO = 0xff;
  13         VIO &= 0x7f;
  14         VIO &= 0xf7;
  15         ASSERT (VIO == 0x77);
  16         VIO |= 0x80;
  17         VIO |= 0x08;
  18         ASSERT (VIO == 0xff);
  19         VIO ^= 0x80;
  20         VIO ^= 0x08;
  21         ASSERT (VIO == 0x77);
  22 #endif
  23 }