sdcc/support/regression/tests/bug-3459.c

   1 /* bug-3459.c
   2    An issue that resulted in a value in register hl being overwritten on z80.
   3  */
   4
   5 #include <testfwk.h>
   6
   7 /// Test derived from code by SF user "Under4Mhz" in 2022.
   8 /// GPL 2.0 or greater
   9 #include <stdbool.h>
  10 #include <stdint.h>
  11 #include <stdio.h>
  12
  13 #define PICTURE_TILE_COUNT 4
  14 #define PICTURE1_TILES 34
  15 #define PICTURE2_TILES ( PICTURE1_TILES + PICTURE_TILE_COUNT )
  16
  17 ///< Is matching tiles
  18 bool IsSameTile( int8_t tile1, int8_t tile2 ) {
  19
  20     if ( tile1 <= 0 || tile2 <= 0 ) return false;
  21
  22     bool same = tile1 == tile2;
  23     bool flowers = tile1 > PICTURE1_TILES && tile1 <= PICTURE2_TILES && tile2 > PICTURE1_TILES && tile2 <= PICTURE2_TILES;
  24     bool seasons = tile1 > PICTURE2_TILES && tile2 > PICTURE2_TILES;
  25
  26     return same || seasons || flowers;
  27 }
  28
  29 void
  30 testBug( void ) {
  31     ASSERT ( IsSameTile(PICTURE1_TILES + 1, PICTURE1_TILES + 2) );
  32     ASSERT ( IsSameTile(PICTURE2_TILES + 2, PICTURE2_TILES + 3) );
  33     ASSERT ( IsSameTile(PICTURE1_TILES + 2, PICTURE1_TILES + 3) );
  34     ASSERT ( IsSameTile(PICTURE2_TILES + 1, PICTURE2_TILES + 2) );
  35 }
  36