libffi/testsuite/libffi.call/cls_2byte.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> 20030828  */
   8
   9 /* { dg-do run { xfail mips*-*-* arm*-*-* strongarm*-*-* xscale*-*-* } } */
  10 #include "ffitest.h"
  11
  12 typedef struct cls_struct_2byte {
  13   unsigned char a;
  14   unsigned char b;
  15 } cls_struct_2byte;
  16
  17 cls_struct_2byte cls_struct_2byte_fn(struct cls_struct_2byte a1,
  18                             struct cls_struct_2byte a2)
  19 {
  20   struct cls_struct_2byte 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_2byte_gn(ffi_cif* cif, void* resp, void** args, void* userdata)
  32 {
  33
  34   struct cls_struct_2byte a1, a2;
  35
  36   a1 = *(struct cls_struct_2byte*)(args[0]);
  37   a2 = *(struct cls_struct_2byte*)(args[1]);
  38
  39   *(cls_struct_2byte*)resp = cls_struct_2byte_fn(a1, a2);
  40 }
  41
  42 int main (void)
  43 {
  44   ffi_cif cif;
  45 #ifndef USING_MMAP
  46   static ffi_closure cl;
  47 #endif
  48   ffi_closure *pcl;
  49   void* args_dbl[5];
  50   ffi_type* cls_struct_fields[4];
  51   ffi_type cls_struct_type;
  52   ffi_type* dbl_arg_types[5];
  53
  54 #ifdef USING_MMAP
  55   pcl = allocate_mmap (sizeof(ffi_closure));
  56 #else
  57   pcl = &cl;
  58 #endif
  59
  60   cls_struct_type.size = 0;
  61   cls_struct_type.alignment = 0;
  62   cls_struct_type.type = FFI_TYPE_STRUCT;
  63   cls_struct_type.elements = cls_struct_fields;
  64
  65   struct cls_struct_2byte g_dbl = { 12, 127 };
  66   struct cls_struct_2byte f_dbl = { 1, 13 };
  67   struct cls_struct_2byte res_dbl;
  68
  69   cls_struct_fields[0] = &ffi_type_uchar;
  70   cls_struct_fields[1] = &ffi_type_uchar;
  71   cls_struct_fields[2] = NULL;
  72
  73   dbl_arg_types[0] = &cls_struct_type;
  74   dbl_arg_types[1] = &cls_struct_type;
  75   dbl_arg_types[2] = NULL;
  76
  77   CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 2, &cls_struct_type,
  78                      dbl_arg_types) == FFI_OK);
  79
  80   args_dbl[0] = &g_dbl;
  81   args_dbl[1] = &f_dbl;
  82   args_dbl[2] = NULL;
  83
  84   ffi_call(&cif, FFI_FN(cls_struct_2byte_fn), &res_dbl, args_dbl);
  85   /* { dg-output "12 127 1 13: 13 140" } */
  86   printf("res: %d %d\n", res_dbl.a, res_dbl.b);
  87   /* { dg-output "\nres: 13 140" } */
  88
  89   CHECK(ffi_prep_closure(pcl, &cif, cls_struct_2byte_gn, NULL) == FFI_OK);
  90
  91   res_dbl = ((cls_struct_2byte(*)(cls_struct_2byte, cls_struct_2byte))(pcl))(g_dbl, f_dbl);
  92   /* { dg-output "\n12 127 1 13: 13 140" } */
  93   printf("res: %d %d\n", res_dbl.a, res_dbl.b);
  94   /* { dg-output "\nres: 13 140" } */
  95
  96   exit(0);
  97 }