libffi/testsuite/libffi.call/cls_3byte1.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. Check overlapping.
   5    Limitations: none.
   6    PR:          none.
   7    Originator:  <andreast@gcc.gnu.org> 20030828  */
   8
   9 /* { dg-do run } */
  10 #include "ffitest.h"
  11
  12 typedef struct cls_struct_3byte {
  13   unsigned short a;
  14   unsigned char b;
  15 } cls_struct_3byte;
  16
  17 cls_struct_3byte cls_struct_3byte_fn(struct cls_struct_3byte a1,
  18                             struct cls_struct_3byte a2)
  19 {
  20   struct cls_struct_3byte result;
  21
  22   result.a = a1.a + a2.a;
  23   result.b = a1.b + a2.b;
  24
  25   printf("%d %d %d %d: %d %d\n", a1.a, a1.b, a2.a, a2.b, result.a, result.b);
  26
  27   return  result;
  28 }
  29
  30 static void
  31 cls_struct_3byte_gn(ffi_cif* cif __UNUSED__, void* resp, void** args,
  32                     void* userdata __UNUSED__)
  33 {
  34
  35   struct cls_struct_3byte a1, a2;
  36
  37   a1 = *(struct cls_struct_3byte*)(args[0]);
  38   a2 = *(struct cls_struct_3byte*)(args[1]);
  39
  40   *(cls_struct_3byte*)resp = cls_struct_3byte_fn(a1, a2);
  41 }
  42
  43 int main (void)
  44 {
  45   ffi_cif cif;
  46   void *code;
  47   ffi_closure *pcl = ffi_closure_alloc(sizeof(ffi_closure), &code);
  48   void* args_dbl[5];
  49   ffi_type* cls_struct_fields[4];
  50   ffi_type cls_struct_type;
  51   ffi_type* dbl_arg_types[5];
  52
  53   struct cls_struct_3byte g_dbl = { 12, 119 };
  54   struct cls_struct_3byte f_dbl = { 1, 15 };
  55   struct cls_struct_3byte res_dbl;
  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   cls_struct_fields[0] = &ffi_type_ushort;
  63   cls_struct_fields[1] = &ffi_type_uchar;
  64   cls_struct_fields[2] = NULL;
  65
  66   dbl_arg_types[0] = &cls_struct_type;
  67   dbl_arg_types[1] = &cls_struct_type;
  68   dbl_arg_types[2] = NULL;
  69
  70   CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 2, &cls_struct_type,
  71                      dbl_arg_types) == FFI_OK);
  72
  73   args_dbl[0] = &g_dbl;
  74   args_dbl[1] = &f_dbl;
  75   args_dbl[2] = NULL;
  76
  77   ffi_call(&cif, FFI_FN(cls_struct_3byte_fn), &res_dbl, args_dbl);
  78   /* { dg-output "12 119 1 15: 13 134" } */
  79   printf("res: %d %d\n", res_dbl.a, res_dbl.b);
  80   /* { dg-output "\nres: 13 134" } */
  81
  82   CHECK(ffi_prep_closure_loc(pcl, &cif, cls_struct_3byte_gn, NULL, code) == FFI_OK);
  83
  84   res_dbl = ((cls_struct_3byte(*)(cls_struct_3byte, cls_struct_3byte))(code))(g_dbl, f_dbl);
  85   /* { dg-output "\n12 119 1 15: 13 134" } */
  86   printf("res: %d %d\n", res_dbl.a, res_dbl.b);
  87   /* { dg-output "\nres: 13 134" } */
  88
  89   exit(0);
  90 }