github.com/prattmic/llgo-embedded@v0.0.0-20150820070356-41cfecea0e1e/third_party/gofrontend/libffi/testsuite/libffi.call/cls_20byte.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  /* { dg-do run } */
     9  #include "ffitest.h"
    10  
    11  typedef struct cls_struct_20byte {
    12    double a;
    13    double b;
    14    int c;
    15  } cls_struct_20byte;
    16  
    17  cls_struct_20byte cls_struct_20byte_fn(struct cls_struct_20byte a1,
    18  			    struct cls_struct_20byte a2)
    19  {
    20    struct cls_struct_20byte result;
    21  
    22    result.a = a1.a + a2.a;
    23    result.b = a1.b + a2.b;
    24    result.c = a1.c + a2.c;
    25  
    26    printf("%g %g %d %g %g %d: %g %g %d\n", a1.a, a1.b, a1.c, a2.a, a2.b, a2.c,
    27  	 result.a, result.b, result.c);
    28    return result;
    29  }
    30  
    31  static void
    32  cls_struct_20byte_gn(ffi_cif* cif __UNUSED__, void* resp, void** args,
    33  		     void* userdata __UNUSED__)
    34  {
    35    struct cls_struct_20byte a1, a2;
    36  
    37    a1 = *(struct cls_struct_20byte*)(args[0]);
    38    a2 = *(struct cls_struct_20byte*)(args[1]);
    39  
    40    *(cls_struct_20byte*)resp = cls_struct_20byte_fn(a1, a2);
    41  }
    42  
    43  int main (void)
    44  {
    45    ffi_cif cif;
    46    void *code;
    47    ffi_closure *pcl = ffi_closure_alloc(sizeof(ffi_closure), &code);
    48    void* args_dbl[5];
    49    ffi_type* cls_struct_fields[4];
    50    ffi_type cls_struct_type;
    51    ffi_type* dbl_arg_types[5];
    52  
    53    struct cls_struct_20byte g_dbl = { 1.0, 2.0, 3 };
    54    struct cls_struct_20byte f_dbl = { 4.0, 5.0, 7 };
    55    struct cls_struct_20byte res_dbl;
    56  
    57    cls_struct_type.size = 0;
    58    cls_struct_type.alignment = 0;
    59    cls_struct_type.type = FFI_TYPE_STRUCT;
    60    cls_struct_type.elements = cls_struct_fields;
    61  
    62    cls_struct_fields[0] = &ffi_type_double;
    63    cls_struct_fields[1] = &ffi_type_double;
    64    cls_struct_fields[2] = &ffi_type_sint;
    65    cls_struct_fields[3] = NULL;
    66  
    67    dbl_arg_types[0] = &cls_struct_type;
    68    dbl_arg_types[1] = &cls_struct_type;
    69    dbl_arg_types[2] = NULL;
    70  
    71    CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 2, &cls_struct_type,
    72  		     dbl_arg_types) == FFI_OK);
    73  
    74    args_dbl[0] = &g_dbl;
    75    args_dbl[1] = &f_dbl;
    76    args_dbl[2] = NULL;
    77  
    78    ffi_call(&cif, FFI_FN(cls_struct_20byte_fn), &res_dbl, args_dbl);
    79    /* { dg-output "1 2 3 4 5 7: 5 7 10" } */
    80    printf("res: %g %g %d\n", res_dbl.a, res_dbl.b, res_dbl.c);
    81    /* { dg-output "\nres: 5 7 10" } */
    82  
    83    CHECK(ffi_prep_closure_loc(pcl, &cif, cls_struct_20byte_gn, NULL, code) == FFI_OK);
    84  
    85    res_dbl = ((cls_struct_20byte(*)(cls_struct_20byte, cls_struct_20byte))(code))(g_dbl, f_dbl);
    86    /* { dg-output "\n1 2 3 4 5 7: 5 7 10" } */
    87    printf("res: %g %g %d\n", res_dbl.a, res_dbl.b, res_dbl.c);
    88    /* { dg-output "\nres: 5 7 10" } */
    89  
    90    exit(0);
    91  }