github.com/prattmic/llgo-embedded@v0.0.0-20150820070356-41cfecea0e1e/third_party/gofrontend/libffi/testsuite/libffi.call/cls_5byte.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_5byte {
    12    unsigned short a;
    13    unsigned short b;
    14    unsigned char c;
    15  } cls_struct_5byte;
    16  
    17  cls_struct_5byte cls_struct_5byte_fn(struct cls_struct_5byte a1,
    18  			    struct cls_struct_5byte a2)
    19  {
    20    struct cls_struct_5byte result;
    21  
    22    result.a = a1.a + a2.a;
    23    result.b = a1.b + a2.b;
    24    result.c = a1.c + a2.c;
    25  
    26    printf("%d %d %d %d %d %d: %d %d %d\n", a1.a, a1.b, a1.c,
    27  	 a2.a, a2.b, a2.c,
    28  	 result.a, result.b, result.c);
    29  
    30    return  result;
    31  }
    32  
    33  static void
    34  cls_struct_5byte_gn(ffi_cif* cif __UNUSED__, void* resp, void** args,
    35  		    void* userdata __UNUSED__)
    36  {
    37  
    38    struct cls_struct_5byte a1, a2;
    39  
    40    a1 = *(struct cls_struct_5byte*)(args[0]);
    41    a2 = *(struct cls_struct_5byte*)(args[1]);
    42  
    43    *(cls_struct_5byte*)resp = cls_struct_5byte_fn(a1, a2);
    44  }
    45  
    46  int main (void)
    47  {
    48    ffi_cif cif;
    49    void *code;
    50    ffi_closure *pcl = ffi_closure_alloc(sizeof(ffi_closure), &code);
    51    void* args_dbl[5];
    52    ffi_type* cls_struct_fields[4];
    53    ffi_type cls_struct_type;
    54    ffi_type* dbl_arg_types[5];
    55  
    56    struct cls_struct_5byte g_dbl = { 127, 120, 1 };
    57    struct cls_struct_5byte f_dbl = { 12, 128, 9 };
    58    struct cls_struct_5byte res_dbl = { 0, 0, 0 };
    59  
    60    cls_struct_type.size = 0;
    61    cls_struct_type.alignment = 0;
    62    cls_struct_type.type = FFI_TYPE_STRUCT;
    63    cls_struct_type.elements = cls_struct_fields;
    64  
    65    cls_struct_fields[0] = &ffi_type_ushort;
    66    cls_struct_fields[1] = &ffi_type_ushort;
    67    cls_struct_fields[2] = &ffi_type_uchar;
    68    cls_struct_fields[3] = NULL;
    69  
    70    dbl_arg_types[0] = &cls_struct_type;
    71    dbl_arg_types[1] = &cls_struct_type;
    72    dbl_arg_types[2] = NULL;
    73  
    74    CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 2, &cls_struct_type,
    75  		     dbl_arg_types) == FFI_OK);
    76  
    77    args_dbl[0] = &g_dbl;
    78    args_dbl[1] = &f_dbl;
    79    args_dbl[2] = NULL;
    80  
    81    ffi_call(&cif, FFI_FN(cls_struct_5byte_fn), &res_dbl, args_dbl);
    82    /* { dg-output "127 120 1 12 128 9: 139 248 10" } */
    83    printf("res: %d %d %d\n", res_dbl.a, res_dbl.b, res_dbl.c);
    84    /* { dg-output "\nres: 139 248 10" } */
    85  
    86    res_dbl.a = 0;
    87    res_dbl.b = 0;
    88    res_dbl.c = 0;
    89  
    90    CHECK(ffi_prep_closure_loc(pcl, &cif, cls_struct_5byte_gn, NULL, code) == FFI_OK);
    91  
    92    res_dbl = ((cls_struct_5byte(*)(cls_struct_5byte, cls_struct_5byte))(code))(g_dbl, f_dbl);
    93    /* { dg-output "\n127 120 1 12 128 9: 139 248 10" } */
    94    printf("res: %d %d %d\n", res_dbl.a, res_dbl.b, res_dbl.c);
    95    /* { dg-output "\nres: 139 248 10" } */
    96  
    97    exit(0);
    98  }