1program test_intrinsic_trailz
2   implicit none
3
4   call test_trailz(0_1,0_2,0_4,0_8,1_1,1_2,1_4,1_8,8_1,8_2,8_4,8_8)
5   stop
6
7   contains
8
9        subroutine test_trailz(z1,z2,z4,z8,i1,i2,i4,i8,e1,e2,e4,e8)
10           integer(kind=1) :: z1, i1, e1
11           integer(kind=2) :: z2, i2, e2
12           integer(kind=4) :: z4, i4, e4
13           integer(kind=8) :: z8, i8, e8
14
15           if (trailz(0_1) /=  8) STOP 1
16           if (trailz(0_2) /= 16) STOP 2
17           if (trailz(0_4) /= 32) STOP 3
18           if (trailz(0_8) /= 64) STOP 4
19
20           if (trailz(1_1) /=  0) STOP 5
21           if (trailz(1_2) /=  0) STOP 6
22           if (trailz(1_4) /=  0) STOP 7
23           if (trailz(1_8) /=  0) STOP 8
24
25           if (trailz(8_1) /=  3) STOP 9
26           if (trailz(8_2) /=  3) STOP 10
27           if (trailz(8_4) /=  3) STOP 11
28           if (trailz(8_8) /=  3) STOP 12
29
30           if (trailz(z1) /=  8) STOP 13
31           if (trailz(z2) /= 16) STOP 14
32           if (trailz(z4) /= 32) STOP 15
33           if (trailz(z8) /= 64) STOP 16
34
35           if (trailz(i1) /=  0) STOP 17
36           if (trailz(i2) /=  0) STOP 18
37           if (trailz(i4) /=  0) STOP 19
38           if (trailz(i8) /=  0) STOP 20
39
40           if (trailz(e1) /=  3) STOP 21
41           if (trailz(e2) /=  3) STOP 22
42           if (trailz(e4) /=  3) STOP 23
43           if (trailz(e8) /=  3) STOP 24
44        end subroutine test_trailz
45
46end program
47