github.com/prattmic/llgo-embedded@v0.0.0-20150820070356-41cfecea0e1e/third_party/gofrontend/libffi/testsuite/libffi.call/cls_8byte.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_8byte {
    12    int a;
    13    float b;
    14  } cls_struct_8byte;
    15  
    16  cls_struct_8byte cls_struct_8byte_fn(struct cls_struct_8byte a1,
    17  			    struct cls_struct_8byte a2)
    18  {
    19    struct cls_struct_8byte result;
    20  
    21    result.a = a1.a + a2.a;
    22    result.b = a1.b + a2.b;
    23  
    24    printf("%d %g %d %g: %d %g\n", a1.a, a1.b, a2.a, a2.b, result.a, result.b);
    25  
    26    return  result;
    27  }
    28  
    29  static void
    30  cls_struct_8byte_gn(ffi_cif* cif __UNUSED__, void* resp, void** args,
    31  		    void* userdata __UNUSED__)
    32  {
    33  
    34    struct cls_struct_8byte a1, a2;
    35  
    36    a1 = *(struct cls_struct_8byte*)(args[0]);
    37    a2 = *(struct cls_struct_8byte*)(args[1]);
    38  
    39    *(cls_struct_8byte*)resp = cls_struct_8byte_fn(a1, a2);
    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_8byte g_dbl = { 1, 2.0 };
    53    struct cls_struct_8byte f_dbl = { 4, 5.0 };
    54    struct cls_struct_8byte 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_float;
    63    cls_struct_fields[2] = NULL;
    64  
    65    dbl_arg_types[0] = &cls_struct_type;
    66    dbl_arg_types[1] = &cls_struct_type;
    67    dbl_arg_types[2] = NULL;
    68  
    69    CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 2, &cls_struct_type,
    70  		     dbl_arg_types) == FFI_OK);
    71  
    72    args_dbl[0] = &g_dbl;
    73    args_dbl[1] = &f_dbl;
    74    args_dbl[2] = NULL;
    75  
    76    ffi_call(&cif, FFI_FN(cls_struct_8byte_fn), &res_dbl, args_dbl);
    77    /* { dg-output "1 2 4 5: 5 7" } */
    78    printf("res: %d %g\n", res_dbl.a, res_dbl.b);
    79    /* { dg-output "\nres: 5 7" } */
    80    CHECK(ffi_prep_closure_loc(pcl, &cif, cls_struct_8byte_gn, NULL, code) == FFI_OK);
    81  
    82    res_dbl = ((cls_struct_8byte(*)(cls_struct_8byte, cls_struct_8byte))(code))(g_dbl, f_dbl);
    83    /* { dg-output "\n1 2 4 5: 5 7" } */
    84    printf("res: %d %g\n", res_dbl.a, res_dbl.b);
    85    /* { dg-output "\nres: 5 7" } */
    86  
    87    exit(0);
    88  }