1c { dg-do run }
2c  intrinsic-unix-bessel.f
3c
4c Test Bessel function intrinsics.
5c These functions are only available if provided by system
6c
7c     David Billinghurst <David.Billinghurst@riotinto.com>
8c
9      real x, a
10      double precision dx, da
11      integer i
12      integer(kind=2) j
13      integer(kind=1) k
14      integer(kind=8) m
15      logical fail
16      common /flags/ fail
17      fail = .false.
18
19      x = 2.0
20      dx = x
21      i = 2
22      j = i
23      k = i
24      m = i
25c     BESJ0  - Bessel function of first kind of order zero
26      a = 0.22389077
27      da = a
28      call c_r(BESJ0(x),a,'BESJ0(real)')
29      call c_d(BESJ0(dx),da,'BESJ0(double)')
30      call c_d(DBESJ0(dx),da,'DBESJ0(double)')
31
32c     BESJ1  - Bessel function of first kind of order one
33      a = 0.57672480
34      da = a
35      call c_r(BESJ1(x),a,'BESJ1(real)')
36      call c_d(BESJ1(dx),da,'BESJ1(double)')
37      call c_d(DBESJ1(dx),da,'DBESJ1(double)')
38
39c     BESJN  - Bessel function of first kind of order N
40      a = 0.3528340
41      da = a
42      call c_r(BESJN(i,x),a,'BESJN(integer,real)')
43      call c_r(BESJN(j,x),a,'BESJN(integer(2),real)')
44      call c_r(BESJN(k,x),a,'BESJN(integer(1),real)')
45      call c_d(BESJN(i,dx),da,'BESJN(integer,double)')
46      call c_d(BESJN(j,dx),da,'BESJN(integer(2),double)')
47      call c_d(BESJN(k,dx),da,'BESJN(integer(1),double)')
48      call c_d(DBESJN(i,dx),da,'DBESJN(integer,double)')
49      call c_d(DBESJN(j,dx),da,'DBESJN(integer(2),double)')
50      call c_d(DBESJN(k,dx),da,'DBESJN(integer(1),double)')
51
52c     BESY0  - Bessel function of second kind of order zero
53      a = 0.51037567
54      da = a
55      call c_r(BESY0(x),a,'BESY0(real)')
56      call c_d(BESY0(dx),da,'BESY0(double)')
57      call c_d(DBESY0(dx),da,'DBESY0(double)')
58
59c     BESY1  - Bessel function of second kind of order one
60      a = 0.-0.1070324
61      da = a
62      call c_r(BESY1(x),a,'BESY1(real)')
63      call c_d(BESY1(dx),da,'BESY1(double)')
64      call c_d(DBESY1(dx),da,'DBESY1(double)')
65
66c     BESYN  - Bessel function of second kind of order N
67      a = -0.6174081
68      da = a
69      call c_r(BESYN(i,x),a,'BESYN(integer,real)')
70      call c_r(BESYN(j,x),a,'BESYN(integer(2),real)')
71      call c_r(BESYN(k,x),a,'BESYN(integer(1),real)')
72      call c_d(BESYN(i,dx),da,'BESYN(integer,double)')
73      call c_d(BESYN(j,dx),da,'BESYN(integer(2),double)')
74      call c_d(BESYN(k,dx),da,'BESYN(integer(1),double)')
75      call c_d(DBESYN(i,dx),da,'DBESYN(integer,double)')
76      call c_d(DBESYN(j,dx),da,'DBESYN(integer(2),double)')
77      call c_d(DBESYN(k,dx),da,'DBESYN(integer(1),double)')
78
79      if ( fail ) STOP 1
80      end
81
82      subroutine failure(label)
83c     Report failure and set flag
84      character*(*) label
85      logical fail
86      common /flags/ fail
87      write(6,'(a,a,a)') 'Test ',label,' FAILED'
88      fail = .true.
89      end
90
91      subroutine c_r(a,b,label)
92c     Check if REAL a equals b, and fail otherwise
93      real a, b
94      character*(*) label
95      if ( abs(a-b) .gt. 1.0e-5 ) then
96         call failure(label)
97         write(6,*) 'Got ',a,' expected ', b
98      end if
99      end
100
101      subroutine c_d(a,b,label)
102c     Check if DOUBLE PRECISION a equals b, and fail otherwise
103      double precision a, b
104      character*(*) label
105      if ( abs(a-b) .gt. 1.0d-5 ) then
106         call failure(label)
107         write(6,*) 'Got ',a,' expected ', b
108      end if
109      end
110