github.com/prattmic/llgo-embedded@v0.0.0-20150820070356-41cfecea0e1e/third_party/gofrontend/libffi/testsuite/libffi.call/cls_20byte1.c (about)

     1  /* Area:	ffi_call, closure_call
     2     Purpose:	Check structure passing with different structure size.
     3  		Depending on the ABI. Check overlapping.
     4     Limitations:	none.
     5     PR:		none.
     6     Originator:	<andreast@gcc.gnu.org> 20030828	 */
     7  
     8  
     9  
    10  /* { dg-do run } */
    11  #include "ffitest.h"
    12  
    13  typedef struct cls_struct_20byte {
    14    int a;
    15    double b;
    16    double c;
    17  } cls_struct_20byte;
    18  
    19  cls_struct_20byte cls_struct_20byte_fn(struct cls_struct_20byte a1,
    20  			    struct cls_struct_20byte a2)
    21  {
    22    struct cls_struct_20byte result;
    23  
    24    result.a = a1.a + a2.a;
    25    result.b = a1.b + a2.b;
    26    result.c = a1.c + a2.c;
    27  
    28    printf("%d %g %g %d %g %g: %d %g %g\n", a1.a, a1.b, a1.c, a2.a, a2.b, a2.c,
    29  	 result.a, result.b, result.c);
    30    return result;
    31  }
    32  
    33  static void
    34  cls_struct_20byte_gn(ffi_cif* cif __UNUSED__, void* resp, void** args,
    35  		     void* userdata __UNUSED__)
    36  {
    37    struct cls_struct_20byte a1, a2;
    38  
    39    a1 = *(struct cls_struct_20byte*)(args[0]);
    40    a2 = *(struct cls_struct_20byte*)(args[1]);
    41  
    42    *(cls_struct_20byte*)resp = cls_struct_20byte_fn(a1, a2);
    43  }
    44  
    45  int main (void)
    46  {
    47    ffi_cif cif;
    48    void *code;
    49    ffi_closure *pcl = ffi_closure_alloc(sizeof(ffi_closure), &code);
    50    void* args_dbl[3];
    51    ffi_type* cls_struct_fields[4];
    52    ffi_type cls_struct_type;
    53    ffi_type* dbl_arg_types[3];
    54  
    55    struct cls_struct_20byte g_dbl = { 1, 2.0, 3.0 };
    56    struct cls_struct_20byte f_dbl = { 4, 5.0, 7.0 };
    57    struct cls_struct_20byte res_dbl;
    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    cls_struct_fields[0] = &ffi_type_sint;
    65    cls_struct_fields[1] = &ffi_type_double;
    66    cls_struct_fields[2] = &ffi_type_double;
    67    cls_struct_fields[3] = NULL;
    68  
    69    dbl_arg_types[0] = &cls_struct_type;
    70    dbl_arg_types[1] = &cls_struct_type;
    71    dbl_arg_types[2] = NULL;
    72  
    73    CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 2, &cls_struct_type,
    74  		     dbl_arg_types) == FFI_OK);
    75  
    76    args_dbl[0] = &g_dbl;
    77    args_dbl[1] = &f_dbl;
    78    args_dbl[2] = NULL;
    79  
    80    ffi_call(&cif, FFI_FN(cls_struct_20byte_fn), &res_dbl, args_dbl);
    81    /* { dg-output "1 2 3 4 5 7: 5 7 10" } */
    82    printf("res: %d %g %g\n", res_dbl.a, res_dbl.b, res_dbl.c);
    83    /* { dg-output "\nres: 5 7 10" } */
    84  
    85    CHECK(ffi_prep_closure_loc(pcl, &cif, cls_struct_20byte_gn, NULL, code) == FFI_OK);
    86  
    87    res_dbl = ((cls_struct_20byte(*)(cls_struct_20byte, cls_struct_20byte))(code))(g_dbl, f_dbl);
    88    /* { dg-output "\n1 2 3 4 5 7: 5 7 10" } */
    89    printf("res: %d %g %g\n", res_dbl.a, res_dbl.b, res_dbl.c);
    90    /* { dg-output "\nres: 5 7 10" } */
    91  
    92    exit(0);
    93  }