1 files changed, 58 insertions, 0 deletions
diff --git a/gcc/testsuite/gfortran.dg/bessel_7.f90 b/gcc/testsuite/gfortran.dg/bessel_7.f90
new file mode 100644
index 000000000..78f1ff251
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+++ b/gcc/testsuite/gfortran.dg/bessel_7.f90
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+! { dg-do run { xfail *-*-mingw* spu-*-* } }
+! { dg-add-options ieee }
+!
+! PR fortran/36158
+! PR fortran/33197
+!
+! For mingw targets this test is disabled as the MS implementation
+! of BESSEL_YN(n,x) has different results.  It returns NAN rather than
+! -INF for "x=0.0" and all "n".
+!
+! XFAILed for SPU targets since we don't have an accurate library
+! implementation of the single-precision Bessel functions.
+!
+! Run-time tests for transformations BESSEL_YN
+!
+implicit none
+real,parameter :: values(*) = [0.0, 0.5, 1.0, 0.9, 1.8,2.0,3.0,4.0,4.25,8.0,34.53, 475.78] 
+real,parameter :: myeps(size(values)) = epsilon(0.0) &
+                  * [2, 3, 4, 5, 8, 2, 12, 6, 7, 6, 31, 168 ]
+! The following is sufficient for me - the values above are a bit
+! more tolerant
+!                  * [0, 0, 0, 3, 3, 0, 9, 0, 2, 1, 22, 130 ]
+integer,parameter :: nit(size(values)) =  &
+                 [100, 100, 100, 25, 15, 100, 10, 31, 7, 100, 7, 25 ]
+integer, parameter :: Nmax = 100
+real :: rec(0:Nmax), lib(0:Nmax)
+integer :: i
+
+do i = 1, ubound(values,dim=1)
+  call compare(values(i), myeps(i), nit(i), 6*epsilon(0.0))
+end do
+
+contains
+
+subroutine compare(X, myeps, nit, myeps2)
+
+integer :: i, nit
+real X, myeps, myeps2
+
+rec = BESSEL_YN(0, Nmax, X)
+lib = [ (BESSEL_YN(i, X), i=0,Nmax) ]
+
+!print *, 'YN for X = ', X, ' -- Epsilon = ',epsilon(x)
+do i = 0, Nmax
+!  print '(i2,2e17.9,e12.2,f14.10,2l3)', i, rec(i), lib(i), &
+!        rec(i)-lib(i), ((rec(i)-lib(i))/rec(i))/epsilon(x), &
+!        i > nit .or. rec(i) == lib(i) &
+!                .or. abs((rec(i)-lib(i))/rec(i)) < myeps2, &
+!        rec(i) == lib(i) .or. abs((rec(i)-lib(i))/rec(i)) < myeps
+if (.not. (i > nit .or. rec(i) == lib(i) &
+                   .or. abs((rec(i)-lib(i))/rec(i)) < myeps2)) &
+  call abort ()
+if (.not. (rec(i) == lib(i) .or. abs((rec(i)-lib(i))/rec(i)) < myeps)) &
+  call abort ()
+end do
+
+end
+end