sdcc/support/regression/tests/bug-3685.c

   1 /* bug-3685.c
   2    Wrong code was generated for an addition involving an operand using exactly one byte of iy.
   3 */
   4
   5 // Based on code by "Under4Mhz" licensed under GPL 2.0 or later
   6
   7 #include <testfwk.h>
   8
   9 #pragma disable_warning 85
  10
  11 #include <stdint.h>
  12 #include <stdbool.h>
  13
  14 typedef struct {
  15
  16     uint8_t page;
  17
  18 } VduTileData;
  19
  20 VduTileData vduTileData;
  21
  22 inline uint16_t vdu_tile_page_address( uint8_t page ) {
  23
  24     return page == 1 ? 0x9000 : 0x9800;
  25 }
  26
  27 inline uint16_t vdu_tile_page_address_get_fast( void ) {
  28
  29     return vdu_tile_page_address( vduTileData.page );
  30 }
  31
  32 void vdu_tiles_put( uint16_t offset, const uint8_t *pixels, const uint8_t *colours ) {
  33
  34         static uint16_t o;
  35         ASSERT (offset == o);
  36         o += 256;
  37 }
  38
  39 uint16_t decompress_vdu(const uint8_t *compressed_data, uint16_t dest ) {}
  40
  41 ///< Render image to screen
  42 void vdu_image_put( const uint8_t **pixels, const uint8_t **colours, const uint8_t *index ) {
  43
  44     ///< Load data
  45     uint16_t segmentOffset = 0;
  46     for( uint8_t segment = 0; segment < 3; segment++ ) {
  47
  48         vdu_tiles_put( segmentOffset, pixels[segment], colours[segment] );
  49         segmentOffset += 256; // 256
  50     }
  51
  52     // Write index table
  53     if ( index ) {
  54
  55         decompress_vdu( index, vdu_tile_page_address_get_fast() );
  56     }
  57 }
  58
  59 void
  60 testBug(void)
  61 {
  62
  63     vduTileData.page = 0;
  64
  65     const uint8_t *const pixels[] = { 0, 0, 0 };
  66     const uint8_t *const colours[] = { 0, 0, 0 };
  67     const uint8_t index[] = { 0 };
  68
  69     vdu_image_put( pixels, colours, index );
  70 }
  71
  72 extern uint16_t vdu_tile_page_address( uint8_t page );
  73
  74 extern uint16_t vdu_tile_page_address_get_fast( void );