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