shotgun/external_libs/libffi/testsuite/libffi.call/float3.c

   1 /* Area:        ffi_call
   2    Purpose:     Check float arguments with different orders.
   3    Limitations: none.
   4    PR:          none.
   5    Originator:  From the original ffitest.c  */
   6
   7 /* { dg-do run } */
   8
   9 #include "ffitest.h"
  10 #include "float.h"
  11
  12 static double floating_1(float a, double b, long double c)
  13 {
  14   return (double) a + b + (double) c;
  15 }
  16
  17 static double floating_2(long double a, double b, float c)
  18 {
  19   return (double) a + b + (double) c;
  20 }
  21
  22 int main (void)
  23 {
  24   ffi_cif cif;
  25   ffi_type *args[MAX_ARGS];
  26   void *values[MAX_ARGS];
  27   double rd;
  28
  29   float f;
  30   double d;
  31   long double ld;
  32
  33   args[0] = &ffi_type_float;
  34   values[0] = &f;
  35   args[1] = &ffi_type_double;
  36   values[1] = &d;
  37   args[2] = &ffi_type_longdouble;
  38   values[2] = &ld;
  39
  40   /* Initialize the cif */
  41   CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 3,
  42                      &ffi_type_double, args) == FFI_OK);
  43
  44   f = 3.14159;
  45   d = (double)1.0/(double)3.0;
  46   ld = 2.71828182846L;
  47
  48   floating_1 (f, d, ld);
  49
  50   ffi_call(&cif, FFI_FN(floating_1), &rd, values);
  51
  52   CHECK(rd - floating_1(f, d, ld) < DBL_EPSILON);
  53
  54   args[0] = &ffi_type_longdouble;
  55   values[0] = &ld;
  56   args[1] = &ffi_type_double;
  57   values[1] = &d;
  58   args[2] = &ffi_type_float;
  59   values[2] = &f;
  60
  61   /* Initialize the cif */
  62   CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 3,
  63                      &ffi_type_double, args) == FFI_OK);
  64
  65   floating_2 (ld, d, f);
  66
  67   ffi_call(&cif, FFI_FN(floating_2), &rd, values);
  68
  69   CHECK(rd - floating_2(ld, d, f) < DBL_EPSILON);
  70
  71   exit (0);
  72 }