sdcc/support/regression/tests/push_pop_sp.c

   1 /** push/pop tests for mcs51.
   2 */
   3 #include <testfwk.h>
   4
   5 __data unsigned char _SP0, _SP1, _SP2;
   6
   7 void test(void)
   8 {
   9 #ifdef __SDCC_mcs51
  10         __asm
  11                 mov     __SP0,SP
  12                 push    SP
  13                 mov     r0,SP
  14                 mov     __SP1,@r0
  15                 mov     @r0,#0xFE
  16                 pop     SP
  17                 mov     __SP2,SP
  18                 mov     SP,__SP0
  19         __endasm;
  20
  21         ASSERT(_SP0 == _SP1);
  22         ASSERT(_SP2 == 0xFE);
  23 #endif
  24 }