libffi/testsuite/libffi.call/cls_3_1byte.c

   1 /* Area:        ffi_call, closure_call
   2    Purpose:     Check structure passing with different structure size.
   3                 Especially with small structures which may fit in one
   4                 register. Depending on the ABI.
   5    Limitations: none.
   6    PR:          none.
   7    Originator:  <andreast@gcc.gnu.org> 20030902  */
   8
   9 /* { dg-do run } */
  10 #include "ffitest.h"
  11
  12 typedef struct cls_struct_3_1byte {
  13   unsigned char a;
  14   unsigned char b;
  15   unsigned char c;
  16 } cls_struct_3_1byte;
  17
  18 cls_struct_3_1byte cls_struct_3_1byte_fn(struct cls_struct_3_1byte a1,
  19                             struct cls_struct_3_1byte a2)
  20 {
  21   struct cls_struct_3_1byte result;
  22
  23   result.a = a1.a + a2.a;
  24   result.b = a1.b + a2.b;
  25   result.c = a1.c + a2.c;
  26
  27   printf("%d %d %d %d %d %d: %d %d %d\n", a1.a, a1.b, a1.c,
  28          a2.a, a2.b, a2.c,
  29          result.a, result.b, result.c);
  30
  31   return  result;
  32 }
  33
  34 static void
  35 cls_struct_3_1byte_gn(ffi_cif* cif __UNUSED__, void* resp, void** args,
  36                       void* userdata __UNUSED__)
  37 {
  38
  39   struct cls_struct_3_1byte a1, a2;
  40
  41   a1 = *(struct cls_struct_3_1byte*)(args[0]);
  42   a2 = *(struct cls_struct_3_1byte*)(args[1]);
  43
  44   *(cls_struct_3_1byte*)resp = cls_struct_3_1byte_fn(a1, a2);
  45 }
  46
  47 int main (void)
  48 {
  49   ffi_cif cif;
  50   void *code;
  51   ffi_closure *pcl = ffi_closure_alloc(sizeof(ffi_closure), &code);
  52   void* args_dbl[5];
  53   ffi_type* cls_struct_fields[4];
  54   ffi_type cls_struct_type;
  55   ffi_type* dbl_arg_types[5];
  56
  57   cls_struct_type.size = 0;
  58   cls_struct_type.alignment = 0;
  59   cls_struct_type.type = FFI_TYPE_STRUCT;
  60   cls_struct_type.elements = cls_struct_fields;
  61
  62   struct cls_struct_3_1byte g_dbl = { 12, 13, 14 };
  63   struct cls_struct_3_1byte f_dbl = { 178, 179, 180 };
  64   struct cls_struct_3_1byte res_dbl;
  65
  66   cls_struct_fields[0] = &ffi_type_uchar;
  67   cls_struct_fields[1] = &ffi_type_uchar;
  68   cls_struct_fields[2] = &ffi_type_uchar;
  69   cls_struct_fields[3] = NULL;
  70
  71   dbl_arg_types[0] = &cls_struct_type;
  72   dbl_arg_types[1] = &cls_struct_type;
  73   dbl_arg_types[2] = NULL;
  74
  75   CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 2, &cls_struct_type,
  76                      dbl_arg_types) == FFI_OK);
  77
  78   args_dbl[0] = &g_dbl;
  79   args_dbl[1] = &f_dbl;
  80   args_dbl[2] = NULL;
  81
  82   ffi_call(&cif, FFI_FN(cls_struct_3_1byte_fn), &res_dbl, args_dbl);
  83   /* { dg-output "12 13 14 178 179 180: 190 192 194" } */
  84   printf("res: %d %d %d\n", res_dbl.a, res_dbl.b, res_dbl.c);
  85   /* { dg-output "\nres: 190 192 194" } */
  86
  87   CHECK(ffi_prep_closure_loc(pcl, &cif, cls_struct_3_1byte_gn, NULL, code) == FFI_OK);
  88
  89   res_dbl = ((cls_struct_3_1byte(*)(cls_struct_3_1byte, cls_struct_3_1byte))(code))(g_dbl, f_dbl);
  90   /* { dg-output "\n12 13 14 178 179 180: 190 192 194" } */
  91   printf("res: %d %d %d\n", res_dbl.a, res_dbl.b, res_dbl.c);
  92   /* { dg-output "\nres: 190 192 194" } */
  93
  94   exit(0);
  95 }