github.com/prattmic/llgo-embedded@v0.0.0-20150820070356-41cfecea0e1e/third_party/gofrontend/libffi/testsuite/libffi.call/cls_12byte.c (about)

     1  /* Area:	ffi_call, closure_call
     2     Purpose:	Check structure passing with different structure size.
     3     Limitations:	none.
     4     PR:		none.
     5     Originator:	<andreast@gcc.gnu.org> 20030828	 */
     6  
     7  /* { dg-do run } */
     8  #include "ffitest.h"
     9  
    10  typedef struct cls_struct_12byte {
    11    int a;
    12    int b;
    13    int c;
    14  } cls_struct_12byte;
    15  
    16  cls_struct_12byte cls_struct_12byte_fn(struct cls_struct_12byte b1,
    17  			    struct cls_struct_12byte b2)
    18  {
    19    struct cls_struct_12byte result;
    20  
    21    result.a = b1.a + b2.a;
    22    result.b = b1.b + b2.b;
    23    result.c = b1.c + b2.c;
    24  
    25    printf("%d %d %d %d %d %d: %d %d %d\n", b1.a, b1.b, b1.c, b2.a, b2.b, b2.c,
    26  	 result.a, result.b, result.c);
    27  
    28    return result;
    29  }
    30  
    31  static void cls_struct_12byte_gn(ffi_cif* cif __UNUSED__, void* resp,
    32  				 void** args , void* userdata __UNUSED__)
    33  {
    34    struct cls_struct_12byte b1, b2;
    35  
    36    b1 = *(struct cls_struct_12byte*)(args[0]);
    37    b2 = *(struct cls_struct_12byte*)(args[1]);
    38  
    39    *(cls_struct_12byte*)resp = cls_struct_12byte_fn(b1, b2);
    40  }
    41  
    42  int main (void)
    43  {
    44    ffi_cif cif;
    45    void *code;
    46    ffi_closure *pcl = ffi_closure_alloc(sizeof(ffi_closure), &code);
    47    void* args_dbl[5];
    48    ffi_type* cls_struct_fields[4];
    49    ffi_type cls_struct_type;
    50    ffi_type* dbl_arg_types[5];
    51  
    52    struct cls_struct_12byte h_dbl = { 7, 4, 9 };
    53    struct cls_struct_12byte j_dbl = { 1, 5, 3 };
    54    struct cls_struct_12byte res_dbl;
    55  
    56    cls_struct_type.size = 0;
    57    cls_struct_type.alignment = 0;
    58    cls_struct_type.type = FFI_TYPE_STRUCT;
    59    cls_struct_type.elements = cls_struct_fields;
    60  
    61    cls_struct_fields[0] = &ffi_type_sint;
    62    cls_struct_fields[1] = &ffi_type_sint;
    63    cls_struct_fields[2] = &ffi_type_sint;
    64    cls_struct_fields[3] = 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] = &h_dbl;
    74    args_dbl[1] = &j_dbl;
    75    args_dbl[2] = NULL;
    76  
    77    ffi_call(&cif, FFI_FN(cls_struct_12byte_fn), &res_dbl, args_dbl);
    78    /* { dg-output "7 4 9 1 5 3: 8 9 12" } */
    79    printf("res: %d %d %d\n", res_dbl.a, res_dbl.b, res_dbl.c);
    80    /* { dg-output "\nres: 8 9 12" } */
    81  
    82    CHECK(ffi_prep_closure_loc(pcl, &cif, cls_struct_12byte_gn, NULL, code) == FFI_OK);
    83  
    84    res_dbl.a = 0;
    85    res_dbl.b = 0;
    86    res_dbl.c = 0;
    87  
    88    res_dbl = ((cls_struct_12byte(*)(cls_struct_12byte, cls_struct_12byte))(code))(h_dbl, j_dbl);
    89    /* { dg-output "\n7 4 9 1 5 3: 8 9 12" } */
    90    printf("res: %d %d %d\n", res_dbl.a, res_dbl.b, res_dbl.c);
    91    /* { dg-output "\nres: 8 9 12" } */
    92  
    93    exit(0);
    94  }