github.com/prattmic/llgo-embedded@v0.0.0-20150820070356-41cfecea0e1e/third_party/gofrontend/libffi/testsuite/libffi.call/cls_7byte.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_7byte {
    12    unsigned short a;
    13    unsigned short b;
    14    unsigned char c;
    15    unsigned short d;
    16  } cls_struct_7byte;
    17  
    18  cls_struct_7byte cls_struct_7byte_fn(struct cls_struct_7byte a1,
    19  			    struct cls_struct_7byte a2)
    20  {
    21    struct cls_struct_7byte result;
    22  
    23    result.a = a1.a + a2.a;
    24    result.b = a1.b + a2.b;
    25    result.c = a1.c + a2.c;
    26    result.d = a1.d + a2.d;
    27  
    28    printf("%d %d %d %d %d %d %d %d: %d %d %d %d\n", a1.a, a1.b, a1.c, a1.d,
    29  	 a2.a, a2.b, a2.c, a2.d,
    30  	 result.a, result.b, result.c, result.d);
    31  
    32    return  result;
    33  }
    34  
    35  static void
    36  cls_struct_7byte_gn(ffi_cif* cif __UNUSED__, void* resp, void** args,
    37  		    void* userdata __UNUSED__)
    38  {
    39  
    40    struct cls_struct_7byte a1, a2;
    41  
    42    a1 = *(struct cls_struct_7byte*)(args[0]);
    43    a2 = *(struct cls_struct_7byte*)(args[1]);
    44  
    45    *(cls_struct_7byte*)resp = cls_struct_7byte_fn(a1, a2);
    46  }
    47  
    48  int main (void)
    49  {
    50    ffi_cif cif;
    51    void *code;
    52    ffi_closure *pcl = ffi_closure_alloc(sizeof(ffi_closure), &code);
    53    void* args_dbl[5];
    54    ffi_type* cls_struct_fields[5];
    55    ffi_type cls_struct_type;
    56    ffi_type* dbl_arg_types[5];
    57  
    58    struct cls_struct_7byte g_dbl = { 127, 120, 1, 254 };
    59    struct cls_struct_7byte f_dbl = { 12, 128, 9, 255 };
    60    struct cls_struct_7byte res_dbl;
    61  
    62    cls_struct_type.size = 0;
    63    cls_struct_type.alignment = 0;
    64    cls_struct_type.type = FFI_TYPE_STRUCT;
    65    cls_struct_type.elements = cls_struct_fields;
    66  
    67    cls_struct_fields[0] = &ffi_type_ushort;
    68    cls_struct_fields[1] = &ffi_type_ushort;
    69    cls_struct_fields[2] = &ffi_type_uchar;
    70    cls_struct_fields[3] = &ffi_type_ushort;
    71    cls_struct_fields[4] = NULL;
    72  
    73    dbl_arg_types[0] = &cls_struct_type;
    74    dbl_arg_types[1] = &cls_struct_type;
    75    dbl_arg_types[2] = NULL;
    76  
    77    CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 2, &cls_struct_type,
    78  		     dbl_arg_types) == FFI_OK);
    79  
    80    args_dbl[0] = &g_dbl;
    81    args_dbl[1] = &f_dbl;
    82    args_dbl[2] = NULL;
    83  
    84    ffi_call(&cif, FFI_FN(cls_struct_7byte_fn), &res_dbl, args_dbl);
    85    /* { dg-output "127 120 1 254 12 128 9 255: 139 248 10 509" } */
    86    printf("res: %d %d %d %d\n", res_dbl.a, res_dbl.b, res_dbl.c, res_dbl.d);
    87    /* { dg-output "\nres: 139 248 10 509" } */
    88  
    89    CHECK(ffi_prep_closure_loc(pcl, &cif, cls_struct_7byte_gn, NULL, code) == FFI_OK);
    90  
    91    res_dbl = ((cls_struct_7byte(*)(cls_struct_7byte, cls_struct_7byte))(code))(g_dbl, f_dbl);
    92    /* { dg-output "\n127 120 1 254 12 128 9 255: 139 248 10 509" } */
    93    printf("res: %d %d %d %d\n", res_dbl.a, res_dbl.b, res_dbl.c, res_dbl.d);
    94    /* { dg-output "\nres: 139 248 10 509" } */
    95  
    96    exit(0);
    97  }