github.com/prattmic/llgo-embedded@v0.0.0-20150820070356-41cfecea0e1e/third_party/gofrontend/libffi/testsuite/libffi.call/cls_5_1_byte.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> 20050708	 */
     7  
     8  /* { dg-do run } */
     9  #include "ffitest.h"
    10  
    11  typedef struct cls_struct_5byte {
    12    unsigned char a;
    13    unsigned char b;
    14    unsigned char c;
    15    unsigned char d;
    16    unsigned char e;
    17  } cls_struct_5byte;
    18  
    19  cls_struct_5byte cls_struct_5byte_fn(struct cls_struct_5byte a1,
    20  			    struct cls_struct_5byte a2)
    21  {
    22    struct cls_struct_5byte result;
    23  
    24    result.a = a1.a + a2.a;
    25    result.b = a1.b + a2.b;
    26    result.c = a1.c + a2.c;
    27    result.d = a1.d + a2.d;
    28    result.e = a1.e + a2.e;
    29  
    30    printf("%d %d %d %d %d %d %d %d %d %d: %d %d %d %d %d\n",
    31  	 a1.a, a1.b, a1.c, a1.d, a1.e,
    32  	 a2.a, a2.b, a2.c, a2.d, a2.e,
    33  	 result.a, result.b, result.c, result.d, result.e);
    34  
    35    return  result;
    36  }
    37  
    38  static void
    39  cls_struct_5byte_gn(ffi_cif* cif __UNUSED__, void* resp, void** args,
    40  		    void* userdata __UNUSED__)
    41  {
    42  
    43    struct cls_struct_5byte a1, a2;
    44  
    45    a1 = *(struct cls_struct_5byte*)(args[0]);
    46    a2 = *(struct cls_struct_5byte*)(args[1]);
    47  
    48    *(cls_struct_5byte*)resp = cls_struct_5byte_fn(a1, a2);
    49  }
    50  
    51  int main (void)
    52  {
    53    ffi_cif cif;
    54    void *code;
    55    ffi_closure *pcl = ffi_closure_alloc(sizeof(ffi_closure), &code);
    56    void* args_dbl[5];
    57    ffi_type* cls_struct_fields[6];
    58    ffi_type cls_struct_type;
    59    ffi_type* dbl_arg_types[5];
    60  
    61    struct cls_struct_5byte g_dbl = { 127, 120, 1, 3, 4 };
    62    struct cls_struct_5byte f_dbl = { 12, 128, 9, 3, 4 };
    63    struct cls_struct_5byte res_dbl = { 0, 0, 0, 0, 0 };
    64  
    65    cls_struct_type.size = 0;
    66    cls_struct_type.alignment = 0;
    67    cls_struct_type.type = FFI_TYPE_STRUCT;
    68    cls_struct_type.elements = cls_struct_fields;
    69  
    70    cls_struct_fields[0] = &ffi_type_uchar;
    71    cls_struct_fields[1] = &ffi_type_uchar;
    72    cls_struct_fields[2] = &ffi_type_uchar;
    73    cls_struct_fields[3] = &ffi_type_uchar;
    74    cls_struct_fields[4] = &ffi_type_uchar;
    75    cls_struct_fields[5] = NULL;
    76  
    77    dbl_arg_types[0] = &cls_struct_type;
    78    dbl_arg_types[1] = &cls_struct_type;
    79    dbl_arg_types[2] = NULL;
    80  
    81    CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 2, &cls_struct_type,
    82  		     dbl_arg_types) == FFI_OK);
    83  
    84    args_dbl[0] = &g_dbl;
    85    args_dbl[1] = &f_dbl;
    86    args_dbl[2] = NULL;
    87  
    88    ffi_call(&cif, FFI_FN(cls_struct_5byte_fn), &res_dbl, args_dbl);
    89    /* { dg-output "127 120 1 3 4 12 128 9 3 4: 139 248 10 6 8" } */
    90    printf("res: %d %d %d %d %d\n", res_dbl.a, res_dbl.b, res_dbl.c,
    91  	 res_dbl.d, res_dbl.e);
    92    /* { dg-output "\nres: 139 248 10 6 8" } */
    93  
    94    res_dbl.a = 0;
    95    res_dbl.b = 0;
    96    res_dbl.c = 0;
    97    res_dbl.d = 0;
    98    res_dbl.e = 0;
    99  
   100    CHECK(ffi_prep_closure_loc(pcl, &cif, cls_struct_5byte_gn, NULL, code) == FFI_OK);
   101  
   102    res_dbl = ((cls_struct_5byte(*)(cls_struct_5byte, cls_struct_5byte))(code))(g_dbl, f_dbl);
   103    /* { dg-output "\n127 120 1 3 4 12 128 9 3 4: 139 248 10 6 8" } */
   104    printf("res: %d %d %d %d %d\n", res_dbl.a, res_dbl.b, res_dbl.c,
   105  	 res_dbl.d, res_dbl.e);
   106    /* { dg-output "\nres: 139 248 10 6 8" } */
   107  
   108    exit(0);
   109  }