libffi/testsuite/libffi.call/promotion.c

   1 /* Area:        ffi_call
   2    Purpose:     Promotion test.
   3    Limitations: none.
   4    PR:          none.
   5    Originator:  From the original ffitest.c  */
   6
   7 /* { dg-do run } */
   8 #include "ffitest.h"
   9 static int promotion(signed char sc, signed short ss,
  10                      unsigned char uc, unsigned short us)
  11 {
  12   int r = (int) sc + (int) ss + (int) uc + (int) us;
  13
  14   return r;
  15 }
  16
  17 int main (void)
  18 {
  19   ffi_cif cif;
  20   ffi_type *args[MAX_ARGS];
  21   void *values[MAX_ARGS];
  22   ffi_arg rint;
  23   signed char sc;
  24   unsigned char uc;
  25   signed short ss;
  26   unsigned short us;
  27   unsigned long ul;
  28
  29   args[0] = &ffi_type_schar;
  30   args[1] = &ffi_type_sshort;
  31   args[2] = &ffi_type_uchar;
  32   args[3] = &ffi_type_ushort;
  33   values[0] = &sc;
  34   values[1] = &ss;
  35   values[2] = &uc;
  36   values[3] = &us;
  37
  38   /* Initialize the cif */
  39   CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 4,
  40                      &ffi_type_sint, args) == FFI_OK);
  41
  42   us = 0;
  43   ul = 0;
  44
  45   for (sc = (signed char) -127;
  46        sc <= (signed char) 120; /*@-type@*/ sc += 1 /*@=type@*/)
  47     for (ss = -30000; ss <= 30000; ss += 10000)
  48       for (uc = (unsigned char) 0;
  49            uc <= (unsigned char) 200; /*@-type@*/ uc += 20 /*@=type@*/)
  50         for (us = 0; us <= 60000; us += 10000)
  51           {
  52             ul++;
  53             ffi_call(&cif, FFI_FN(promotion), &rint, values);
  54             CHECK((int)rint == (signed char) sc + (signed short) ss +
  55                   (unsigned char) uc + (unsigned short) us);
  56           }
  57   printf("%lu promotion tests run\n", ul);
  58   exit(0);
  59 }