sdcc/support/regression/tests/bug-3579.c

   1 /* bug-3579.c
   2    Codegen for sm83 could generate an "ex de, hl" (a Z80 instruction not supported on SM83) when passing a struct as function argument while register hl holds another variable.
   3    This would then result in an error message from the assembler.
   4  */
   5
   6 #include <testfwk.h>
   7
   8 // Based on code by "Under4Mhz" licensed under GPL 2.0 or later
   9 #pragma disable_warning 85
  10
  11 #include <stdint.h>
  12 #include <stdbool.h>
  13
  14 typedef struct {
  15
  16     uint8_t type;
  17     uint8_t state;
  18     uint8_t left;
  19     uint8_t width;
  20     uint8_t ingress;
  21     uint8_t scale;
  22
  23 } SpriteData;
  24
  25 uint8_t vdu_patch_crop_impl( uint8_t id, int8_t col, int8_t row,
  26     int8_t width, int8_t offset, const uint8_t *counts, const uint8_t *colours,
  27     int8_t cols, int8_t rows, uint16_t tile_offset, bool zoom ) {
  28
  29     ASSERT( tile_offset == 8);
  30
  31     return 0;
  32 }
  33
  34 typedef uint8_t ImageBaseType;
  35
  36 typedef struct {
  37
  38     const ImageBaseType * const * const * const sprites;
  39     uint8_t bank;
  40
  41 } SpriteItem;
  42
  43 const ImageBaseType * const I1 = {0};
  44 const ImageBaseType * const * const I0 = &I1;
  45 SpriteItem SI = {&I0, 0};
  46
  47 const SpriteItem * wolf_sheets[1] = {&SI};
  48
  49 uint8_t sprite_state_show( uint8_t id, SpriteData *sprite, uint8_t y, uint8_t tile ) {
  50
  51     static bool zoom = false;
  52
  53     // Only allow zoom on first sprite, if it's full size enemy
  54     if ( id == 0 ) {
  55         zoom = sprite->type > 1 && sprite->scale == 5;
  56         if ( zoom ) sprite->scale--;
  57     } else {
  58         if ( zoom ) goto finish;
  59     }
  60
  61     const SpriteItem * sprite_data = wolf_sheets[0];
  62
  63     const ImageBaseType * const * const scale_sprite_data = sprite_data[0].sprites[0];
  64
  65     id = vdu_patch_crop_impl( id, sprite->left, 0, sprite->width, 0, scale_sprite_data[0], 0,0,0, tile, zoom );
  66
  67  finish:
  68
  69     return id;
  70 }
  71
  72 void
  73 testBug (void) {
  74     SpriteData sprite = { 1,2,3,4,5,6};
  75     sprite_state_show( 0, &sprite, 7, 8 );
  76 }
  77