github.com/prattmic/llgo-embedded@v0.0.0-20150820070356-41cfecea0e1e/third_party/gofrontend/libffi/testsuite/libffi.call/cls_24byte.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_24byte {
    12    double a;
    13    double b;
    14    int c;
    15    float d;
    16  } cls_struct_24byte;
    17  
    18  cls_struct_24byte cls_struct_24byte_fn(struct cls_struct_24byte b0,
    19  			    struct cls_struct_24byte b1,
    20  			    struct cls_struct_24byte b2,
    21  			    struct cls_struct_24byte b3)
    22  {
    23    struct cls_struct_24byte result;
    24  
    25    result.a = b0.a + b1.a + b2.a + b3.a;
    26    result.b = b0.b + b1.b + b2.b + b3.b;
    27    result.c = b0.c + b1.c + b2.c + b3.c;
    28    result.d = b0.d + b1.d + b2.d + b3.d;
    29  
    30    printf("%g %g %d %g %g %g %d %g %g %g %d %g %g %g %d %g: %g %g %d %g\n",
    31  	 b0.a, b0.b, b0.c, b0.d,
    32  	 b1.a, b1.b, b1.c, b1.d,
    33  	 b2.a, b2.b, b2.c, b2.d,
    34  	 b3.a, b3.b, b3.c, b2.d,
    35  	 result.a, result.b, result.c, result.d);
    36  
    37    return result;
    38  }
    39  
    40  static void
    41  cls_struct_24byte_gn(ffi_cif* cif __UNUSED__, void* resp, void** args,
    42  		     void* userdata __UNUSED__)
    43  {
    44    struct cls_struct_24byte b0, b1, b2, b3;
    45  
    46    b0 = *(struct cls_struct_24byte*)(args[0]);
    47    b1 = *(struct cls_struct_24byte*)(args[1]);
    48    b2 = *(struct cls_struct_24byte*)(args[2]);
    49    b3 = *(struct cls_struct_24byte*)(args[3]);
    50  
    51    *(cls_struct_24byte*)resp = cls_struct_24byte_fn(b0, b1, b2, b3);
    52  }
    53  
    54  int main (void)
    55  {
    56    ffi_cif cif;
    57    void *code;
    58    ffi_closure *pcl = ffi_closure_alloc(sizeof(ffi_closure), &code);
    59    void* args_dbl[5];
    60    ffi_type* cls_struct_fields[5];
    61    ffi_type cls_struct_type;
    62    ffi_type* dbl_arg_types[5];
    63  
    64    struct cls_struct_24byte e_dbl = { 9.0, 2.0, 6, 5.0 };
    65    struct cls_struct_24byte f_dbl = { 1.0, 2.0, 3, 7.0 };
    66    struct cls_struct_24byte g_dbl = { 4.0, 5.0, 7, 9.0 };
    67    struct cls_struct_24byte h_dbl = { 8.0, 6.0, 1, 4.0 };
    68    struct cls_struct_24byte res_dbl;
    69  
    70    cls_struct_type.size = 0;
    71    cls_struct_type.alignment = 0;
    72    cls_struct_type.type = FFI_TYPE_STRUCT;
    73    cls_struct_type.elements = cls_struct_fields;
    74  
    75    cls_struct_fields[0] = &ffi_type_double;
    76    cls_struct_fields[1] = &ffi_type_double;
    77    cls_struct_fields[2] = &ffi_type_sint;
    78    cls_struct_fields[3] = &ffi_type_float;
    79    cls_struct_fields[4] = NULL;
    80  
    81    dbl_arg_types[0] = &cls_struct_type;
    82    dbl_arg_types[1] = &cls_struct_type;
    83    dbl_arg_types[2] = &cls_struct_type;
    84    dbl_arg_types[3] = &cls_struct_type;
    85    dbl_arg_types[4] = NULL;
    86  
    87    CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 4, &cls_struct_type,
    88  		     dbl_arg_types) == FFI_OK);
    89  
    90    args_dbl[0] = &e_dbl;
    91    args_dbl[1] = &f_dbl;
    92    args_dbl[2] = &g_dbl;
    93    args_dbl[3] = &h_dbl;
    94    args_dbl[4] = NULL;
    95  
    96    ffi_call(&cif, FFI_FN(cls_struct_24byte_fn), &res_dbl, args_dbl);
    97    /* { dg-output "9 2 6 5 1 2 3 7 4 5 7 9 8 6 1 9: 22 15 17 25" } */
    98    printf("res: %g %g %d %g\n", res_dbl.a, res_dbl.b, res_dbl.c, res_dbl.d);
    99    /* { dg-output "\nres: 22 15 17 25" } */
   100  
   101    CHECK(ffi_prep_closure_loc(pcl, &cif, cls_struct_24byte_gn, NULL, code) == FFI_OK);
   102  
   103    res_dbl = ((cls_struct_24byte(*)(cls_struct_24byte,
   104  				   cls_struct_24byte,
   105  				   cls_struct_24byte,
   106  				   cls_struct_24byte))
   107  	     (code))(e_dbl, f_dbl, g_dbl, h_dbl);
   108    /* { dg-output "\n9 2 6 5 1 2 3 7 4 5 7 9 8 6 1 9: 22 15 17 25" } */
   109    printf("res: %g %g %d %g\n", res_dbl.a, res_dbl.b, res_dbl.c, res_dbl.d);
   110    /* { dg-output "\nres: 22 15 17 25" } */
   111  
   112    exit(0);
   113  }