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c { dg-do run }
c intrinsic-unix-bessel.f
c
c Test Bessel function intrinsics.
c These functions are only available if provided by system
c
c David Billinghurst <David.Billinghurst@riotinto.com>
c
real x, a
double precision dx, da
integer i
integer(kind=2) j
integer(kind=1) k
integer(kind=8) m
logical fail
common /flags/ fail
fail = .false.
x = 2.0
dx = x
i = 2
j = i
k = i
m = i
c BESJ0 - Bessel function of first kind of order zero
a = 0.22389077
da = a
call c_r(BESJ0(x),a,'BESJ0(real)')
call c_d(BESJ0(dx),da,'BESJ0(double)')
call c_d(DBESJ0(dx),da,'DBESJ0(double)')
c BESJ1 - Bessel function of first kind of order one
a = 0.57672480
da = a
call c_r(BESJ1(x),a,'BESJ1(real)')
call c_d(BESJ1(dx),da,'BESJ1(double)')
call c_d(DBESJ1(dx),da,'DBESJ1(double)')
c BESJN - Bessel function of first kind of order N
a = 0.3528340
da = a
call c_r(BESJN(i,x),a,'BESJN(integer,real)')
call c_r(BESJN(j,x),a,'BESJN(integer(2),real)')
call c_r(BESJN(k,x),a,'BESJN(integer(1),real)')
call c_d(BESJN(i,dx),da,'BESJN(integer,double)')
call c_d(BESJN(j,dx),da,'BESJN(integer(2),double)')
call c_d(BESJN(k,dx),da,'BESJN(integer(1),double)')
call c_d(DBESJN(i,dx),da,'DBESJN(integer,double)')
call c_d(DBESJN(j,dx),da,'DBESJN(integer(2),double)')
call c_d(DBESJN(k,dx),da,'DBESJN(integer(1),double)')
c BESY0 - Bessel function of second kind of order zero
a = 0.51037567
da = a
call c_r(BESY0(x),a,'BESY0(real)')
call c_d(BESY0(dx),da,'BESY0(double)')
call c_d(DBESY0(dx),da,'DBESY0(double)')
c BESY1 - Bessel function of second kind of order one
a = 0.-0.1070324
da = a
call c_r(BESY1(x),a,'BESY1(real)')
call c_d(BESY1(dx),da,'BESY1(double)')
call c_d(DBESY1(dx),da,'DBESY1(double)')
c BESYN - Bessel function of second kind of order N
a = -0.6174081
da = a
call c_r(BESYN(i,x),a,'BESYN(integer,real)')
call c_r(BESYN(j,x),a,'BESYN(integer(2),real)')
call c_r(BESYN(k,x),a,'BESYN(integer(1),real)')
call c_d(BESYN(i,dx),da,'BESYN(integer,double)')
call c_d(BESYN(j,dx),da,'BESYN(integer(2),double)')
call c_d(BESYN(k,dx),da,'BESYN(integer(1),double)')
call c_d(DBESYN(i,dx),da,'DBESYN(integer,double)')
call c_d(DBESYN(j,dx),da,'DBESYN(integer(2),double)')
call c_d(DBESYN(k,dx),da,'DBESYN(integer(1),double)')
if ( fail ) call abort()
end
subroutine failure(label)
c Report failure and set flag
character*(*) label
logical fail
common /flags/ fail
write(6,'(a,a,a)') 'Test ',label,' FAILED'
fail = .true.
end
subroutine c_r(a,b,label)
c Check if REAL a equals b, and fail otherwise
real a, b
character*(*) label
if ( abs(a-b) .gt. 1.0e-5 ) then
call failure(label)
write(6,*) 'Got ',a,' expected ', b
end if
end
subroutine c_d(a,b,label)
c Check if DOUBLE PRECISION a equals b, and fail otherwise
double precision a, b
character*(*) label
if ( abs(a-b) .gt. 1.0d-5 ) then
call failure(label)
write(6,*) 'Got ',a,' expected ', b
end if
end
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