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