github.com/prattmic/llgo-embedded@v0.0.0-20150820070356-41cfecea0e1e/third_party/gofrontend/libffi/testsuite/libffi.call/cls_7_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_7byte {
    12    unsigned char a;
    13    unsigned char b;
    14    unsigned char c;
    15    unsigned char d;
    16    unsigned char e;
    17    unsigned char f;
    18    unsigned char g;
    19  } cls_struct_7byte;
    20  
    21  cls_struct_7byte cls_struct_7byte_fn(struct cls_struct_7byte a1,
    22  			    struct cls_struct_7byte a2)
    23  {
    24    struct cls_struct_7byte result;
    25  
    26    result.a = a1.a + a2.a;
    27    result.b = a1.b + a2.b;
    28    result.c = a1.c + a2.c;
    29    result.d = a1.d + a2.d;
    30    result.e = a1.e + a2.e;
    31    result.f = a1.f + a2.f;
    32    result.g = a1.g + a2.g;
    33  
    34    printf("%d %d %d %d %d %d %d %d %d %d %d %d %d %d: %d %d %d %d %d %d %d\n",
    35  	 a1.a, a1.b, a1.c, a1.d, a1.e, a1.f, a1.g,
    36  	 a2.a, a2.b, a2.c, a2.d, a2.e, a2.f, a2.g,
    37  	 result.a, result.b, result.c, result.d, result.e, result.f, result.g);
    38  
    39    return  result;
    40  }
    41  
    42  static void
    43  cls_struct_7byte_gn(ffi_cif* cif __UNUSED__, void* resp, void** args,
    44  		    void* userdata __UNUSED__)
    45  {
    46  
    47    struct cls_struct_7byte a1, a2;
    48  
    49    a1 = *(struct cls_struct_7byte*)(args[0]);
    50    a2 = *(struct cls_struct_7byte*)(args[1]);
    51  
    52    *(cls_struct_7byte*)resp = cls_struct_7byte_fn(a1, a2);
    53  }
    54  
    55  int main (void)
    56  {
    57    ffi_cif cif;
    58    void *code;
    59    ffi_closure *pcl = ffi_closure_alloc(sizeof(ffi_closure), &code);
    60    void* args_dbl[5];
    61    ffi_type* cls_struct_fields[8];
    62    ffi_type cls_struct_type;
    63    ffi_type* dbl_arg_types[5];
    64  
    65    struct cls_struct_7byte g_dbl = { 127, 120, 1, 3, 4, 5, 6 };
    66    struct cls_struct_7byte f_dbl = { 12, 128, 9, 3, 4, 5, 6 };
    67    struct cls_struct_7byte res_dbl = { 0, 0, 0, 0, 0, 0, 0 };
    68  
    69    cls_struct_type.size = 0;
    70    cls_struct_type.alignment = 0;
    71    cls_struct_type.type = FFI_TYPE_STRUCT;
    72    cls_struct_type.elements = cls_struct_fields;
    73  
    74    cls_struct_fields[0] = &ffi_type_uchar;
    75    cls_struct_fields[1] = &ffi_type_uchar;
    76    cls_struct_fields[2] = &ffi_type_uchar;
    77    cls_struct_fields[3] = &ffi_type_uchar;
    78    cls_struct_fields[4] = &ffi_type_uchar;
    79    cls_struct_fields[5] = &ffi_type_uchar;
    80    cls_struct_fields[6] = &ffi_type_uchar;
    81    cls_struct_fields[7] = NULL;
    82  
    83    dbl_arg_types[0] = &cls_struct_type;
    84    dbl_arg_types[1] = &cls_struct_type;
    85    dbl_arg_types[2] = NULL;
    86  
    87    CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 2, &cls_struct_type,
    88  		     dbl_arg_types) == FFI_OK);
    89  
    90    args_dbl[0] = &g_dbl;
    91    args_dbl[1] = &f_dbl;
    92    args_dbl[2] = NULL;
    93  
    94    ffi_call(&cif, FFI_FN(cls_struct_7byte_fn), &res_dbl, args_dbl);
    95    /* { dg-output "127 120 1 3 4 5 6 12 128 9 3 4 5 6: 139 248 10 6 8 10 12" } */
    96    printf("res: %d %d %d %d %d %d %d\n", res_dbl.a, res_dbl.b, res_dbl.c,
    97  	 res_dbl.d, res_dbl.e, res_dbl.f, res_dbl.g);
    98    /* { dg-output "\nres: 139 248 10 6 8 10 12" } */
    99  
   100    res_dbl.a = 0;
   101    res_dbl.b = 0;
   102    res_dbl.c = 0;
   103    res_dbl.d = 0;
   104    res_dbl.e = 0;
   105    res_dbl.f = 0;
   106    res_dbl.g = 0;
   107  
   108    CHECK(ffi_prep_closure_loc(pcl, &cif, cls_struct_7byte_gn, NULL, code) == FFI_OK);
   109  
   110    res_dbl = ((cls_struct_7byte(*)(cls_struct_7byte, cls_struct_7byte))(code))(g_dbl, f_dbl);
   111    /* { dg-output "\n127 120 1 3 4 5 6 12 128 9 3 4 5 6: 139 248 10 6 8 10 12" } */
   112    printf("res: %d %d %d %d %d %d %d\n", res_dbl.a, res_dbl.b, res_dbl.c,
   113  	 res_dbl.d, res_dbl.e, res_dbl.f, res_dbl.g);
   114    /* { dg-output "\nres: 139 248 10 6 8 10 12" } */
   115  
   116    exit(0);
   117  }