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 #include <math.h>
  13
  14 static double floating_1(float a, double b, long double c)
  15 {
  16   return (double) a + b + (double) c;
  17 }
  18
  19 static double floating_2(long double a, double b, float c)
  20 {
  21   return (double) a + b + (double) c;
  22 }
  23
  24 int main (void)
  25 {
  26   ffi_cif cif;
  27   ffi_type *args[MAX_ARGS];
  28   void *values[MAX_ARGS];
  29   double rd;
  30
  31   float f;
  32   double d;
  33   long double ld;
  34
  35   args[0] = &ffi_type_float;
  36   values[0] = &f;
  37   args[1] = &ffi_type_double;
  38   values[1] = &d;
  39   args[2] = &ffi_type_longdouble;
  40   values[2] = &ld;
  41
  42   /* Initialize the cif */
  43   CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 3,
  44                      &ffi_type_double, args) == FFI_OK);
  45
  46   f = 3.14159;
  47   d = (double)1.0/(double)3.0;
  48   ld = 2.71828182846L;
  49
  50   floating_1 (f, d, ld);
  51
  52   ffi_call(&cif, FFI_FN(floating_1), &rd, values);
  53
  54   CHECK(fabs(rd - floating_1(f, d, ld)) < DBL_EPSILON);
  55
  56   args[0] = &ffi_type_longdouble;
  57   values[0] = &ld;
  58   args[1] = &ffi_type_double;
  59   values[1] = &d;
  60   args[2] = &ffi_type_float;
  61   values[2] = &f;
  62
  63   /* Initialize the cif */
  64   CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 3,
  65                      &ffi_type_double, args) == FFI_OK);
  66
  67   floating_2 (ld, d, f);
  68
  69   ffi_call(&cif, FFI_FN(floating_2), &rd, values);
  70
  71   CHECK(fabs(rd - floating_2(ld, d, f)) < DBL_EPSILON);
  72
  73   exit (0);
  74 }