sdcc/support/regression/tests/bug-3406.c

   1 /* bug-3406.c
   2    A bug in z80 subtraction codegen attempting to use iyl as right operand even on argets where this is not possible (triggering an assettion in codegen).
   3  */
   4
   5 #include <testfwk.h>
   6
   7 #pragma disable_warning 85
   8
   9 #ifndef __SDCC_z80
  10 #define __banked
  11 #endif
  12
  13 // GPL Version 2.0
  14 #include <stdint.h>
  15 uint8_t KeyMenuWait();
  16
  17 ///< Show product menu
  18 uint16_t SelectAmount(uint16_t amount, uint8_t step, const char *post) __banked {
  19
  20     char text[8];
  21
  22     for( ;; ) {
  23
  24         *text = 0;
  25
  26         uint8_t key = KeyMenuWait();
  27
  28         switch( key ) {
  29
  30                 // More
  31             case 0:
  32                 if ( amount < 1000 ) amount += step;
  33                 break;
  34
  35                 // Less
  36             case 1:
  37                 if ( amount > step ) amount -= step;
  38                 break;
  39
  40             case 2:
  41             case 3:
  42                 return 0; // cancel
  43
  44             case 4:
  45             case 5:
  46                 return amount;
  47         }
  48     }
  49 }
  50
  51 void testBug(void) {
  52         ASSERT(SelectAmount(0, 1, 0) == 0);
  53 }
  54
  55 uint8_t KeyMenuWait() {
  56         static uint8_t i;
  57         return i++;
  58 }
  59
  60 #ifdef __SDCC_z80
  61 void dummy (void) __naked
  62 {
  63 __asm
  64 get_bank::
  65 set_bank::
  66         ret
  67 __endasm;
  68 }
  69 #endif
  70