github.com/prattmic/llgo-embedded@v0.0.0-20150820070356-41cfecea0e1e/third_party/gofrontend/libffi/testsuite/libffi.call/cls_3_1byte.c (about)

     1  /* Area:	ffi_call, closure_call
     2     Purpose:	Check structure passing with different structure size.
     3  		Especially with small structures which may fit in one
     4  		register. Depending on the ABI.
     5     Limitations:	none.
     6     PR:		none.
     7     Originator:	<andreast@gcc.gnu.org> 20030902	 */
     8  
     9  /* { dg-do run } */
    10  #include "ffitest.h"
    11  
    12  typedef struct cls_struct_3_1byte {
    13    unsigned char a;
    14    unsigned char b;
    15    unsigned char c;
    16  } cls_struct_3_1byte;
    17  
    18  cls_struct_3_1byte cls_struct_3_1byte_fn(struct cls_struct_3_1byte a1,
    19  			    struct cls_struct_3_1byte a2)
    20  {
    21    struct cls_struct_3_1byte result;
    22  
    23    result.a = a1.a + a2.a;
    24    result.b = a1.b + a2.b;
    25    result.c = a1.c + a2.c;
    26  
    27    printf("%d %d %d %d %d %d: %d %d %d\n", a1.a, a1.b, a1.c,
    28  	 a2.a, a2.b, a2.c,
    29  	 result.a, result.b, result.c);
    30  
    31    return  result;
    32  }
    33  
    34  static void
    35  cls_struct_3_1byte_gn(ffi_cif* cif __UNUSED__, void* resp, void** args,
    36  		      void* userdata __UNUSED__)
    37  {
    38  
    39    struct cls_struct_3_1byte a1, a2;
    40  
    41    a1 = *(struct cls_struct_3_1byte*)(args[0]);
    42    a2 = *(struct cls_struct_3_1byte*)(args[1]);
    43  
    44    *(cls_struct_3_1byte*)resp = cls_struct_3_1byte_fn(a1, a2);
    45  }
    46  
    47  int main (void)
    48  {
    49    ffi_cif cif;
    50    void *code;
    51    ffi_closure *pcl = ffi_closure_alloc(sizeof(ffi_closure), &code);
    52    void* args_dbl[5];
    53    ffi_type* cls_struct_fields[4];
    54    ffi_type cls_struct_type;
    55    ffi_type* dbl_arg_types[5];
    56  
    57    struct cls_struct_3_1byte g_dbl = { 12, 13, 14 };
    58    struct cls_struct_3_1byte f_dbl = { 178, 179, 180 };
    59    struct cls_struct_3_1byte res_dbl;
    60  
    61    cls_struct_type.size = 0;
    62    cls_struct_type.alignment = 0;
    63    cls_struct_type.type = FFI_TYPE_STRUCT;
    64    cls_struct_type.elements = cls_struct_fields;
    65  
    66    cls_struct_fields[0] = &ffi_type_uchar;
    67    cls_struct_fields[1] = &ffi_type_uchar;
    68    cls_struct_fields[2] = &ffi_type_uchar;
    69    cls_struct_fields[3] = NULL;
    70  
    71    dbl_arg_types[0] = &cls_struct_type;
    72    dbl_arg_types[1] = &cls_struct_type;
    73    dbl_arg_types[2] = NULL;
    74  
    75    CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 2, &cls_struct_type,
    76  		     dbl_arg_types) == FFI_OK);
    77  
    78    args_dbl[0] = &g_dbl;
    79    args_dbl[1] = &f_dbl;
    80    args_dbl[2] = NULL;
    81  
    82    ffi_call(&cif, FFI_FN(cls_struct_3_1byte_fn), &res_dbl, args_dbl);
    83    /* { dg-output "12 13 14 178 179 180: 190 192 194" } */
    84    printf("res: %d %d %d\n", res_dbl.a, res_dbl.b, res_dbl.c);
    85    /* { dg-output "\nres: 190 192 194" } */
    86  
    87    CHECK(ffi_prep_closure_loc(pcl, &cif, cls_struct_3_1byte_gn, NULL, code) == FFI_OK);
    88  
    89    res_dbl = ((cls_struct_3_1byte(*)(cls_struct_3_1byte, cls_struct_3_1byte))(code))(g_dbl, f_dbl);
    90    /* { dg-output "\n12 13 14 178 179 180: 190 192 194" } */
    91    printf("res: %d %d %d\n", res_dbl.a, res_dbl.b, res_dbl.c);
    92    /* { dg-output "\nres: 190 192 194" } */
    93  
    94    exit(0);
    95  }