blob: a23051d48199f4e373245c9ebf3aed287aa02512 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
|
/* { dg-options "-fcilkplus" } */
/* { dg-do run { target i?86-*-* x86_64-*-* } } */
/* { dg-options "-fcilkplus -lcilkrts" { target { i?86-*-* x86_64-*-* } } } */
#if HAVE_IO
#include <stdio.h>
#endif
#define FIB_ITERATION 30
int fib (int);
int fib_serial (int);
int main(void)
{
int ii = 0;
int fib_result[FIB_ITERATION+1], fib_serial_result[FIB_ITERATION+1];
#if HAVE_IO
for (ii = 0; ii <= FIB_ITERATION; ii++)
printf("fib (%2d) = %10d\n", ii, fib (ii));
#else
for (ii = 0; ii <= FIB_ITERATION; ii++)
{
fib_result[ii] = fib (ii);
}
fib_serial_result[0] = 0;
fib_serial_result[1] = 1;
for (ii = 2; ii <= FIB_ITERATION; ii++)
fib_serial_result[ii] = fib_serial_result[ii-1] + fib_serial_result[ii-2];
for (ii = 0; ii <= FIB_ITERATION; ii++)
{
if (fib_result[ii] != fib_serial_result[ii])
__builtin_abort ();
}
#endif
return 0;
}
int fib_serial (int n)
{
int x = 0, y = 0;
if (n < 2)
return n;
else
{
x = fib_serial (n-1);
y = fib_serial (n-2);
return (x+y);
}
}
int fib(int n)
{
if (n < 2)
return n;
else
{
int x = _Cilk_spawn fib(n-1);
int y = fib(n-2);
return (x+y);
}
}
|