sdcc/support/regression/tests/bug-3090.c

   1 /* bug-3090.c
   2    A bug in gbz80 code generation for 16-bit addition with operands allocated to bc and de, result spilt.
   3  */
   4
   5 #include <testfwk.h>
   6
   7 #define UINT8           unsigned char
   8 #define specialchar_nl  '\n'
   9
  10 #define buffer_length (16)
  11 UINT8 buffer[buffer_length];
  12
  13 UINT8 smart_write(const UINT8 y, const UINT8 height, char *str){
  14     UINT8 length;
  15     UINT8 run = 1;
  16     UINT8 tmp_y = y;
  17     UINT8 jump_back = 0;
  18     UINT8 ret = 0;
  19     // string pointer
  20     char *str_ptr = str;
  21     while(run){
  22         for(length = 0; length < 16; ++length){
  23             if(*str_ptr == specialchar_nl || *str_ptr == '\0'){
  24                 buffer[length] = '\0';
  25                 break;
  26             }
  27             buffer[length] = *str_ptr;
  28             ++str_ptr;
  29             if(jump_back != 0){
  30                 --jump_back;
  31             }
  32         }
  33         if(*str_ptr == '\0'){
  34             run = 0;
  35         } else {
  36             if(*str_ptr == specialchar_nl)
  37                 ++str_ptr;
  38             tmp_y += 1;
  39         }
  40         if(tmp_y >= y+height){ // Wrong code generated for addition here.
  41             tmp_y = y;
  42             ++ret;
  43         }
  44     }
  45     return ret;
  46 }
  47
  48 void
  49 testBug(void){
  50     ASSERT(smart_write(1, 20, "test\n") == 0);
  51 }
  52