github.com/prattmic/llgo-embedded@v0.0.0-20150820070356-41cfecea0e1e/third_party/gofrontend/libffi/testsuite/libffi.call/nested_struct.c (about)

     1  /* Area:	ffi_call, closure_call
     2     Purpose:	Check structure passing with different structure size.
     3  		Contains structs as parameter of the struct itself.
     4     Limitations:	none.
     5     PR:		none.
     6     Originator:	<andreast@gcc.gnu.org> 20030828	 */
     7  
     8  /* { dg-do run } */
     9  #include "ffitest.h"
    10  
    11  typedef struct cls_struct_16byte1 {
    12    double a;
    13    float b;
    14    int c;
    15  } cls_struct_16byte1;
    16  
    17  typedef struct cls_struct_16byte2 {
    18    int ii;
    19    double dd;
    20    float ff;
    21  } cls_struct_16byte2;
    22  
    23  typedef struct cls_struct_combined {
    24    cls_struct_16byte1 d;
    25    cls_struct_16byte2 e;
    26  } cls_struct_combined;
    27  
    28  cls_struct_combined cls_struct_combined_fn(struct cls_struct_16byte1 b0,
    29  			    struct cls_struct_16byte2 b1,
    30  			    struct cls_struct_combined b2)
    31  {
    32    struct cls_struct_combined result;
    33  
    34    result.d.a = b0.a + b1.dd + b2.d.a;
    35    result.d.b = b0.b + b1.ff + b2.d.b;
    36    result.d.c = b0.c + b1.ii + b2.d.c;
    37    result.e.ii = b0.c + b1.ii + b2.e.ii;
    38    result.e.dd = b0.a + b1.dd + b2.e.dd;
    39    result.e.ff = b0.b + b1.ff + b2.e.ff;
    40  
    41    printf("%g %g %d %d %g %g %g %g %d %d %g %g: %g %g %d %d %g %g\n",
    42  	 b0.a, b0.b, b0.c,
    43  	 b1.ii, b1.dd, b1.ff,
    44  	 b2.d.a, b2.d.b, b2.d.c,
    45  	 b2.e.ii, b2.e.dd, b2.e.ff,
    46  	 result.d.a, result.d.b, result.d.c,
    47  	 result.e.ii, result.e.dd, result.e.ff);
    48  
    49    return result;
    50  }
    51  
    52  static void
    53  cls_struct_combined_gn(ffi_cif* cif __UNUSED__, void* resp, void** args,
    54  		       void* userdata __UNUSED__)
    55  {
    56    struct cls_struct_16byte1 b0;
    57    struct cls_struct_16byte2 b1;
    58    struct cls_struct_combined b2;
    59  
    60    b0 = *(struct cls_struct_16byte1*)(args[0]);
    61    b1 = *(struct cls_struct_16byte2*)(args[1]);
    62    b2 = *(struct cls_struct_combined*)(args[2]);
    63  
    64  
    65    *(cls_struct_combined*)resp = cls_struct_combined_fn(b0, b1, b2);
    66  }
    67  
    68  int main (void)
    69  {
    70    ffi_cif cif;
    71    void *code;
    72    ffi_closure *pcl = ffi_closure_alloc(sizeof(ffi_closure), &code);
    73    void* args_dbl[5];
    74    ffi_type* cls_struct_fields[5];
    75    ffi_type* cls_struct_fields1[5];
    76    ffi_type* cls_struct_fields2[5];
    77    ffi_type cls_struct_type, cls_struct_type1, cls_struct_type2;
    78    ffi_type* dbl_arg_types[5];
    79  
    80    struct cls_struct_16byte1 e_dbl = { 9.0, 2.0, 6};
    81    struct cls_struct_16byte2 f_dbl = { 1, 2.0, 3.0};
    82    struct cls_struct_combined g_dbl = {{4.0, 5.0, 6},
    83  				      {3, 1.0, 8.0}};
    84    struct cls_struct_combined res_dbl;
    85  
    86    cls_struct_type.size = 0;
    87    cls_struct_type.alignment = 0;
    88    cls_struct_type.type = FFI_TYPE_STRUCT;
    89    cls_struct_type.elements = cls_struct_fields;
    90  
    91    cls_struct_type1.size = 0;
    92    cls_struct_type1.alignment = 0;
    93    cls_struct_type1.type = FFI_TYPE_STRUCT;
    94    cls_struct_type1.elements = cls_struct_fields1;
    95  
    96    cls_struct_type2.size = 0;
    97    cls_struct_type2.alignment = 0;
    98    cls_struct_type2.type = FFI_TYPE_STRUCT;
    99    cls_struct_type2.elements = cls_struct_fields2;
   100  
   101    cls_struct_fields[0] = &ffi_type_double;
   102    cls_struct_fields[1] = &ffi_type_float;
   103    cls_struct_fields[2] = &ffi_type_sint;
   104    cls_struct_fields[3] = NULL;
   105  
   106    cls_struct_fields1[0] = &ffi_type_sint;
   107    cls_struct_fields1[1] = &ffi_type_double;
   108    cls_struct_fields1[2] = &ffi_type_float;
   109    cls_struct_fields1[3] = NULL;
   110  
   111    cls_struct_fields2[0] = &cls_struct_type;
   112    cls_struct_fields2[1] = &cls_struct_type1;
   113    cls_struct_fields2[2] = NULL;
   114  
   115  
   116    dbl_arg_types[0] = &cls_struct_type;
   117    dbl_arg_types[1] = &cls_struct_type1;
   118    dbl_arg_types[2] = &cls_struct_type2;
   119    dbl_arg_types[3] = NULL;
   120  
   121    CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 3, &cls_struct_type2,
   122  		     dbl_arg_types) == FFI_OK);
   123  
   124    args_dbl[0] = &e_dbl;
   125    args_dbl[1] = &f_dbl;
   126    args_dbl[2] = &g_dbl;
   127    args_dbl[3] = NULL;
   128  
   129    ffi_call(&cif, FFI_FN(cls_struct_combined_fn), &res_dbl, args_dbl);
   130    /* { dg-output "9 2 6 1 2 3 4 5 6 3 1 8: 15 10 13 10 12 13" } */
   131    CHECK( res_dbl.d.a == (e_dbl.a + f_dbl.dd + g_dbl.d.a));
   132    CHECK( res_dbl.d.b == (e_dbl.b + f_dbl.ff + g_dbl.d.b));
   133    CHECK( res_dbl.d.c == (e_dbl.c + f_dbl.ii + g_dbl.d.c));
   134    CHECK( res_dbl.e.ii == (e_dbl.c + f_dbl.ii + g_dbl.e.ii));
   135    CHECK( res_dbl.e.dd == (e_dbl.a + f_dbl.dd + g_dbl.e.dd));
   136    CHECK( res_dbl.e.ff == (e_dbl.b + f_dbl.ff + g_dbl.e.ff));
   137  
   138    CHECK(ffi_prep_closure_loc(pcl, &cif, cls_struct_combined_gn, NULL, code) == FFI_OK);
   139  
   140    res_dbl = ((cls_struct_combined(*)(cls_struct_16byte1,
   141  				     cls_struct_16byte2,
   142  				     cls_struct_combined))
   143  	     (code))(e_dbl, f_dbl, g_dbl);
   144    /* { dg-output "\n9 2 6 1 2 3 4 5 6 3 1 8: 15 10 13 10 12 13" } */
   145    CHECK( res_dbl.d.a == (e_dbl.a + f_dbl.dd + g_dbl.d.a));
   146    CHECK( res_dbl.d.b == (e_dbl.b + f_dbl.ff + g_dbl.d.b));
   147    CHECK( res_dbl.d.c == (e_dbl.c + f_dbl.ii + g_dbl.d.c));
   148    CHECK( res_dbl.e.ii == (e_dbl.c + f_dbl.ii + g_dbl.e.ii));
   149    CHECK( res_dbl.e.dd == (e_dbl.a + f_dbl.dd + g_dbl.e.dd));
   150    CHECK( res_dbl.e.ff == (e_dbl.b + f_dbl.ff + g_dbl.e.ff));
   151    exit(0);
   152  }