Ruby  2.7.0p0(2019-12-25revision647ee6f091eafcce70ffb75ddf7e121e192ab217)
return_fl2.c
Go to the documentation of this file.
1 /* Area: ffi_call
2  Purpose: Check return value float.
3  Limitations: none.
4  PR: none.
5  Originator: <andreast@gcc.gnu.org> 20050212 */
6 
7 /* { dg-do run } */
8 #include "ffitest.h"
9 
10 /* Use volatile float to avoid false negative on ix86. See PR target/323. */
11 static float return_fl(float fl1, float fl2, float fl3, float fl4)
12 {
13  volatile float sum;
14 
15  sum = fl1 + fl2 + fl3 + fl4;
16  return sum;
17 }
18 int main (void)
19 {
20  ffi_cif cif;
21  ffi_type *args[MAX_ARGS];
22  void *values[MAX_ARGS];
23  float fl1, fl2, fl3, fl4, rfl;
24  volatile float sum;
25 
26  args[0] = &ffi_type_float;
27  args[1] = &ffi_type_float;
28  args[2] = &ffi_type_float;
29  args[3] = &ffi_type_float;
30  values[0] = &fl1;
31  values[1] = &fl2;
32  values[2] = &fl3;
33  values[3] = &fl4;
34 
35  /* Initialize the cif */
37  &ffi_type_float, args) == FFI_OK);
38  fl1 = 127.0;
39  fl2 = 128.0;
40  fl3 = 255.1;
41  fl4 = 512.7;
42 
43  ffi_call(&cif, FFI_FN(return_fl), &rfl, values);
44  printf ("%f vs %f\n", rfl, return_fl(fl1, fl2, fl3, fl4));
45 
46  sum = fl1 + fl2 + fl3 + fl4;
47  CHECK(rfl == sum);
48  exit(0);
49 }
main
int main(void)
Definition: return_fl2.c:18
printf
int int int printf(const char *__restrict,...) __attribute__((__format__(__printf__
exit
void exit(int __status) __attribute__((__noreturn__))
ffitest.h
CHECK
#define CHECK(sub)
Definition: compile.c:448
FFI_DEFAULT_ABI
@ FFI_DEFAULT_ABI
Definition: ffitarget.h:38
ffi_prep_cif
ffi_status ffi_prep_cif(ffi_cif *cif, ffi_abi abi, unsigned int nargs, ffi_type *rtype, ffi_type **atypes)
Definition: prep_cif.c:226
MAX_ARGS
#define MAX_ARGS
Definition: function.c:15
ffi_call
void ffi_call(ffi_cif *cif, void(*fn)(void), void *rvalue, void **avalue)
Definition: ffi.c:813