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