libffi/testsuite/libffi.call/cls_longdouble_va.c

   1 /* Area:                ffi_call, closure_call
   2    Purpose:             Test long doubles passed in variable argument lists.
   3    Limitations: none.
   4    PR:                  none.
   5    Originator:  Blake Chaffin 6/6/2007   */
   6
   7 /* { dg-do run { xfail strongarm*-*-* xscale*-*-* } } */
   8 /* { dg-output "" { xfail avr32*-*-* x86_64-*-mingw* } } */
   9 /* { dg-skip-if "" arm*-*-* { "-mfloat-abi=hard" } { "" } } */
  10
  11 #include "ffitest.h"
  12
  13 static void
  14 cls_longdouble_va_fn(ffi_cif* cif __UNUSED__, void* resp,
  15                      void** args, void* userdata __UNUSED__)
  16 {
  17         char*           format  = *(char**)args[0];
  18         long double     ldValue = *(long double*)args[1];
  19
  20         *(ffi_arg*)resp = printf(format, ldValue);
  21 }
  22
  23 int main (void)
  24 {
  25         ffi_cif cif;
  26         void *code;
  27         ffi_closure *pcl = ffi_closure_alloc(sizeof(ffi_closure), &code);
  28         void* args[3];
  29         ffi_type* arg_types[3];
  30
  31         char*           format  = "%.1Lf\n";
  32         long double     ldArg   = 7;
  33         ffi_arg         res             = 0;
  34
  35         arg_types[0] = &ffi_type_pointer;
  36         arg_types[1] = &ffi_type_longdouble;
  37         arg_types[2] = NULL;
  38
  39         CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 2, &ffi_type_sint,
  40                 arg_types) == FFI_OK);
  41
  42         args[0] = &format;
  43         args[1] = &ldArg;
  44         args[2] = NULL;
  45
  46         ffi_call(&cif, FFI_FN(printf), &res, args);
  47         // { dg-output "7.0" }
  48         printf("res: %d\n", (int) res);
  49         // { dg-output "\nres: 4" }
  50
  51         CHECK(ffi_prep_closure_loc(pcl, &cif, cls_longdouble_va_fn, NULL, code) == FFI_OK);
  52
  53         res     = ((int(*)(char*, long double))(code))(format, ldArg);
  54         // { dg-output "\n7.0" }
  55         printf("res: %d\n", (int) res);
  56         // { dg-output "\nres: 4" }
  57
  58         exit(0);
  59 }