github.com/prattmic/llgo-embedded@v0.0.0-20150820070356-41cfecea0e1e/third_party/gofrontend/libffi/testsuite/libffi.call/cls_18byte.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_18byte {
    12    double a;
    13    unsigned char b;
    14    unsigned char c;
    15    double d;
    16  } cls_struct_18byte;
    17  
    18  cls_struct_18byte cls_struct_18byte_fn(struct cls_struct_18byte a1,
    19  			    struct cls_struct_18byte a2)
    20  {
    21    struct cls_struct_18byte 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  
    29    printf("%g %d %d %g %g %d %d %g: %g %d %d %g\n", a1.a, a1.b, a1.c, a1.d,
    30  	 a2.a, a2.b, a2.c, a2.d,
    31  	 result.a, result.b, result.c, result.d);
    32    return result;
    33  }
    34  
    35  static void
    36  cls_struct_18byte_gn(ffi_cif* cif __UNUSED__, void* resp, void** args,
    37  		     void* userdata __UNUSED__)
    38  {
    39    struct cls_struct_18byte a1, a2;
    40  
    41    a1 = *(struct cls_struct_18byte*)(args[0]);
    42    a2 = *(struct cls_struct_18byte*)(args[1]);
    43  
    44    *(cls_struct_18byte*)resp = cls_struct_18byte_fn(a1, a2);
    45  }
    46  
    47  int main (void)
    48  {
    49    ffi_cif cif;
    50    void *code;
    51    ffi_closure *pcl = ffi_closure_alloc(sizeof(ffi_closure), &code);
    52    void* args_dbl[3];
    53    ffi_type* cls_struct_fields[5];
    54    ffi_type cls_struct_type;
    55    ffi_type* dbl_arg_types[3];
    56  
    57    struct cls_struct_18byte g_dbl = { 1.0, 127, 126, 3.0 };
    58    struct cls_struct_18byte f_dbl = { 4.0, 125, 124, 5.0 };
    59    struct cls_struct_18byte res_dbl;
    60  
    61    cls_struct_type.size = 0;
    62    cls_struct_type.alignment = 0;
    63    cls_struct_type.type = FFI_TYPE_STRUCT;
    64    cls_struct_type.elements = cls_struct_fields;
    65  
    66    cls_struct_fields[0] = &ffi_type_double;
    67    cls_struct_fields[1] = &ffi_type_uchar;
    68    cls_struct_fields[2] = &ffi_type_uchar;
    69    cls_struct_fields[3] = &ffi_type_double;
    70    cls_struct_fields[4] = NULL;
    71  
    72    dbl_arg_types[0] = &cls_struct_type;
    73    dbl_arg_types[1] = &cls_struct_type;
    74    dbl_arg_types[2] = NULL;
    75  
    76    CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 2, &cls_struct_type,
    77  		     dbl_arg_types) == FFI_OK);
    78  
    79    args_dbl[0] = &g_dbl;
    80    args_dbl[1] = &f_dbl;
    81    args_dbl[2] = NULL;
    82  
    83    ffi_call(&cif, FFI_FN(cls_struct_18byte_fn), &res_dbl, args_dbl);
    84    /* { dg-output "1 127 126 3 4 125 124 5: 5 252 250 8" } */
    85    printf("res: %g %d %d %g\n", res_dbl.a, res_dbl.b, res_dbl.c, res_dbl.d);
    86    /* { dg-output "\nres: 5 252 250 8" } */
    87  
    88    CHECK(ffi_prep_closure_loc(pcl, &cif, cls_struct_18byte_gn, NULL, code) == FFI_OK);
    89  
    90    res_dbl = ((cls_struct_18byte(*)(cls_struct_18byte, cls_struct_18byte))(code))(g_dbl, f_dbl);
    91    /* { dg-output "\n1 127 126 3 4 125 124 5: 5 252 250 8" } */
    92    printf("res: %g %d %d %g\n", res_dbl.a, res_dbl.b, res_dbl.c, res_dbl.d);
    93    /* { dg-output "\nres: 5 252 250 8" } */
    94  
    95    exit(0);
    96  }