libffi/testsuite/libffi.call/cls_4_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_4_1byte {
  13   unsigned char a;
  14   unsigned char b;
  15   unsigned char c;
  16   unsigned char d;
  17 } cls_struct_4_1byte;
  18
  19 cls_struct_4_1byte cls_struct_4_1byte_fn(struct cls_struct_4_1byte a1,
  20                             struct cls_struct_4_1byte a2)
  21 {
  22   struct cls_struct_4_1byte result;
  23
  24   result.a = a1.a + a2.a;
  25   result.b = a1.b + a2.b;
  26   result.c = a1.c + a2.c;
  27   result.d = a1.d + a2.d;
  28
  29   printf("%d %d %d %d %d %d %d %d: %d %d %d %d\n", a1.a, a1.b, a1.c, a1.d,
  30          a2.a, a2.b, a2.c, a2.d,
  31          result.a, result.b, result.c, result.d);
  32
  33   return  result;
  34 }
  35
  36 static void
  37 cls_struct_4_1byte_gn(ffi_cif* cif __UNUSED__, void* resp, void** args,
  38                       void* userdata __UNUSED__)
  39 {
  40
  41   struct cls_struct_4_1byte a1, a2;
  42
  43   a1 = *(struct cls_struct_4_1byte*)(args[0]);
  44   a2 = *(struct cls_struct_4_1byte*)(args[1]);
  45
  46   *(cls_struct_4_1byte*)resp = cls_struct_4_1byte_fn(a1, a2);
  47 }
  48
  49 int main (void)
  50 {
  51   ffi_cif cif;
  52   void *code;
  53   ffi_closure *pcl = ffi_closure_alloc(sizeof(ffi_closure), &code);
  54   void* args_dbl[5];
  55   ffi_type* cls_struct_fields[5];
  56   ffi_type cls_struct_type;
  57   ffi_type* dbl_arg_types[5];
  58
  59   cls_struct_type.size = 0;
  60   cls_struct_type.alignment = 0;
  61   cls_struct_type.type = FFI_TYPE_STRUCT;
  62   cls_struct_type.elements = cls_struct_fields;
  63
  64   struct cls_struct_4_1byte g_dbl = { 12, 13, 14, 15 };
  65   struct cls_struct_4_1byte f_dbl = { 178, 179, 180, 181 };
  66   struct cls_struct_4_1byte res_dbl;
  67
  68   cls_struct_fields[0] = &ffi_type_uchar;
  69   cls_struct_fields[1] = &ffi_type_uchar;
  70   cls_struct_fields[2] = &ffi_type_uchar;
  71   cls_struct_fields[3] = &ffi_type_uchar;
  72   cls_struct_fields[4] = NULL;
  73
  74   dbl_arg_types[0] = &cls_struct_type;
  75   dbl_arg_types[1] = &cls_struct_type;
  76   dbl_arg_types[2] = NULL;
  77
  78   CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 2, &cls_struct_type,
  79                      dbl_arg_types) == FFI_OK);
  80
  81   args_dbl[0] = &g_dbl;
  82   args_dbl[1] = &f_dbl;
  83   args_dbl[2] = NULL;
  84
  85   ffi_call(&cif, FFI_FN(cls_struct_4_1byte_fn), &res_dbl, args_dbl);
  86   /* { dg-output "12 13 14 15 178 179 180 181: 190 192 194 196" } */
  87   printf("res: %d %d %d %d\n", res_dbl.a, res_dbl.b, res_dbl.c, res_dbl.d);
  88   /* { dg-output "\nres: 190 192 194 196" } */
  89
  90   CHECK(ffi_prep_closure_loc(pcl, &cif, cls_struct_4_1byte_gn, NULL, code) == FFI_OK);
  91
  92   res_dbl = ((cls_struct_4_1byte(*)(cls_struct_4_1byte, cls_struct_4_1byte))(code))(g_dbl, f_dbl);
  93   /* { dg-output "\n12 13 14 15 178 179 180 181: 190 192 194 196" } */
  94   printf("res: %d %d %d %d\n", res_dbl.a, res_dbl.b, res_dbl.c, res_dbl.d);
  95   /* { dg-output "\nres: 190 192 194 196" } */
  96
  97   exit(0);
  98 }