github.com/prattmic/llgo-embedded@v0.0.0-20150820070356-41cfecea0e1e/third_party/gofrontend/libffi/testsuite/libffi.call/cls_19byte.c (about)

     1  /* Area:	ffi_call, closure_call
     2     Purpose:	Check structure passing with different structure size.
     3  		Depending on the ABI. Double alignment check on darwin.
     4     Limitations:	none.
     5     PR:		none.
     6     Originator:	<andreast@gcc.gnu.org> 20030915	 */
     7  
     8  /* { dg-do run } */
     9  #include "ffitest.h"
    10  
    11  typedef struct cls_struct_19byte {
    12    double a;
    13    unsigned char b;
    14    unsigned char c;
    15    double d;
    16    unsigned char e;
    17  } cls_struct_19byte;
    18  
    19  cls_struct_19byte cls_struct_19byte_fn(struct cls_struct_19byte a1,
    20  			    struct cls_struct_19byte a2)
    21  {
    22    struct cls_struct_19byte 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  
    31    printf("%g %d %d %g %d %g %d %d %g %d: %g %d %d %g %d\n",
    32  	 a1.a, a1.b, a1.c, a1.d, a1.e,
    33  	 a2.a, a2.b, a2.c, a2.d, a2.e,
    34  	 result.a, result.b, result.c, result.d, result.e);
    35    return result;
    36  }
    37  
    38  static void
    39  cls_struct_19byte_gn(ffi_cif* cif __UNUSED__, void* resp, void** args,
    40  		     void* userdata __UNUSED__)
    41  {
    42    struct cls_struct_19byte a1, a2;
    43  
    44    a1 = *(struct cls_struct_19byte*)(args[0]);
    45    a2 = *(struct cls_struct_19byte*)(args[1]);
    46  
    47    *(cls_struct_19byte*)resp = cls_struct_19byte_fn(a1, a2);
    48  }
    49  
    50  int main (void)
    51  {
    52    ffi_cif cif;
    53    void *code;
    54    ffi_closure *pcl = ffi_closure_alloc(sizeof(ffi_closure), &code);
    55    void* args_dbl[3];
    56    ffi_type* cls_struct_fields[6];
    57    ffi_type cls_struct_type;
    58    ffi_type* dbl_arg_types[3];
    59  
    60    struct cls_struct_19byte g_dbl = { 1.0, 127, 126, 3.0, 120 };
    61    struct cls_struct_19byte f_dbl = { 4.0, 125, 124, 5.0, 119 };
    62    struct cls_struct_19byte res_dbl;
    63  
    64    cls_struct_type.size = 0;
    65    cls_struct_type.alignment = 0;
    66    cls_struct_type.type = FFI_TYPE_STRUCT;
    67    cls_struct_type.elements = cls_struct_fields;
    68  
    69    cls_struct_fields[0] = &ffi_type_double;
    70    cls_struct_fields[1] = &ffi_type_uchar;
    71    cls_struct_fields[2] = &ffi_type_uchar;
    72    cls_struct_fields[3] = &ffi_type_double;
    73    cls_struct_fields[4] = &ffi_type_uchar;
    74    cls_struct_fields[5] = NULL;
    75  
    76    dbl_arg_types[0] = &cls_struct_type;
    77    dbl_arg_types[1] = &cls_struct_type;
    78    dbl_arg_types[2] = NULL;
    79  
    80    CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 2, &cls_struct_type,
    81  		     dbl_arg_types) == FFI_OK);
    82  
    83    args_dbl[0] = &g_dbl;
    84    args_dbl[1] = &f_dbl;
    85    args_dbl[2] = NULL;
    86  
    87    ffi_call(&cif, FFI_FN(cls_struct_19byte_fn), &res_dbl, args_dbl);
    88    /* { dg-output "1 127 126 3 120 4 125 124 5 119: 5 252 250 8 239" } */
    89    printf("res: %g %d %d %g %d\n", res_dbl.a, res_dbl.b, res_dbl.c,
    90  	 res_dbl.d, res_dbl.e);
    91    /* { dg-output "\nres: 5 252 250 8 239" } */
    92  
    93    CHECK(ffi_prep_closure_loc(pcl, &cif, cls_struct_19byte_gn, NULL, code) == FFI_OK);
    94  
    95    res_dbl = ((cls_struct_19byte(*)(cls_struct_19byte, cls_struct_19byte))(code))(g_dbl, f_dbl);
    96    /* { dg-output "\n1 127 126 3 120 4 125 124 5 119: 5 252 250 8 239" } */
    97    printf("res: %g %d %d %g %d\n", res_dbl.a, res_dbl.b, res_dbl.c,
    98  	 res_dbl.d, res_dbl.e);
    99    /* { dg-output "\nres: 5 252 250 8 239" } */
   100  
   101    exit(0);
   102  }