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

     1  /* Area:	ffi_call, closure_call
     2     Purpose:	Check structure alignment of long double.
     3     Limitations:	none.
     4     PR:		none.
     5     Originator:	<hos@tamanegi.org> 20031203	 */
     6  
     7  /* { dg-do run } */
     8  
     9  #include "ffitest.h"
    10  
    11  typedef struct cls_struct_align {
    12    unsigned char a;
    13    long double b;
    14    unsigned char c;
    15  } cls_struct_align;
    16  
    17  cls_struct_align cls_struct_align_fn(struct cls_struct_align a1,
    18  			    struct cls_struct_align a2)
    19  {
    20    struct cls_struct_align 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 %g %d %d %g %d: %d %g %d\n", a1.a, (double)a1.b, a1.c, a2.a, (double)a2.b, a2.c, result.a, (double)result.b, result.c);
    27  
    28    return  result;
    29  }
    30  
    31  static void
    32  cls_struct_align_gn(ffi_cif* cif __UNUSED__, void* resp, void** args,
    33  		    void* userdata __UNUSED__)
    34  {
    35  
    36    struct cls_struct_align a1, a2;
    37  
    38    a1 = *(struct cls_struct_align*)(args[0]);
    39    a2 = *(struct cls_struct_align*)(args[1]);
    40  
    41    *(cls_struct_align*)resp = cls_struct_align_fn(a1, a2);
    42  }
    43  
    44  int main (void)
    45  {
    46    ffi_cif cif;
    47    void *code;
    48    ffi_closure *pcl = ffi_closure_alloc(sizeof(ffi_closure), &code);
    49    void* args_dbl[5];
    50    ffi_type* cls_struct_fields[4];
    51    ffi_type cls_struct_type;
    52    ffi_type* dbl_arg_types[5];
    53  
    54    struct cls_struct_align g_dbl = { 12, 4951, 127 };
    55    struct cls_struct_align f_dbl = { 1, 9320, 13 };
    56    struct cls_struct_align res_dbl;
    57  
    58    cls_struct_type.size = 0;
    59    cls_struct_type.alignment = 0;
    60    cls_struct_type.type = FFI_TYPE_STRUCT;
    61    cls_struct_type.elements = cls_struct_fields;
    62  
    63    cls_struct_fields[0] = &ffi_type_uchar;
    64    cls_struct_fields[1] = &ffi_type_longdouble;
    65    cls_struct_fields[2] = &ffi_type_uchar;
    66    cls_struct_fields[3] = NULL;
    67  
    68    dbl_arg_types[0] = &cls_struct_type;
    69    dbl_arg_types[1] = &cls_struct_type;
    70    dbl_arg_types[2] = NULL;
    71  
    72    CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 2, &cls_struct_type,
    73  		     dbl_arg_types) == FFI_OK);
    74  
    75    args_dbl[0] = &g_dbl;
    76    args_dbl[1] = &f_dbl;
    77    args_dbl[2] = NULL;
    78  
    79    ffi_call(&cif, FFI_FN(cls_struct_align_fn), &res_dbl, args_dbl);
    80    /* { dg-output "12 4951 127 1 9320 13: 13 14271 140" } */
    81    printf("res: %d %g %d\n", res_dbl.a, (double)res_dbl.b, res_dbl.c);
    82    /* { dg-output "\nres: 13 14271 140" } */
    83  
    84    CHECK(ffi_prep_closure_loc(pcl, &cif, cls_struct_align_gn, NULL, code) == FFI_OK);
    85  
    86    res_dbl = ((cls_struct_align(*)(cls_struct_align, cls_struct_align))(code))(g_dbl, f_dbl);
    87    /* { dg-output "\n12 4951 127 1 9320 13: 13 14271 140" } */
    88    printf("res: %d %g %d\n", res_dbl.a, (double)res_dbl.b, res_dbl.c);
    89    /* { dg-output "\nres: 13 14271 140" } */
    90  
    91    exit(0);
    92  }