The exp test case fails on s390(x) for the dd_real type. It used to pass fine in the F-16 days, so I suspect it can be gcc related. The last successful build used gcc 4.6.3, later ones with gcc 4.7 and 4.8 are failing due the exp test.

[sharkcz@devel6 tests]$ ./qd_test -v

Testing dd_real ...
sizeof(dd_real) = 16

Test 1.  (Polynomial).
Root Found:  x  = -7.1453772716733489700000161162586e-01
           p(x) = 9.6099071118588433664679939071683e-33
Test passed.

Test 2.  (Machin's Formula for Pi).
22 Iterations
7 Iterations
   pi = 3.1415926535897932384626433832795e+00
  _pi = 3.1415926535897932384626433832795e+00
error = 4.93038e-32 = 1 eps
Test passed.

Test 3.  (Salamin-Brent Quadratic Formula for Pi).
Iteration  0: 4.0000000000000000000000000000000e+00
Iteration  1: 3.1876726427121086272019299705252e+00
Iteration  2: 3.1416802932976532939180704245601e+00
Iteration  3: 3.1415926538954464960029147588176e+00
Iteration  4: 3.1415926535897932384663606027056e+00
Iteration  5: 3.1415926535897932384626433832785e+00
Iteration  6: 3.1415926535897932384626433832784e+00
         _pi: 3.1415926535897932384626433832795e+00
       error: 1.06003e-30 = 21.5 eps
Test passed.

Test 4.  (Borwein Quartic Formula for Pi).
Iteration  0: 2.9142135623730950488016887242092e+00
Iteration  1: 3.1415926462135422821493444319824e+00
Iteration  2: 3.1415926535897932384626433832789e+00
Iteration  3: 3.1415926535897932384626433832789e+00
         _pi: 3.1415926535897932384626433832795e+00
       error: 6.40949e-31 = 13 eps
Test passed.

Test 5.  (Taylor Series Formula for E).
    e = 2.7182818284590452353602874713526e+00
   _e = 2.7182818284590452353602874713527e+00
error = 9.86076e-32 = 2 eps
29 iterations.
Test passed.

Test 6.  (Taylor Series Formula for Log 2).
 log2 = 6.9314718055994530941723212145814e-01
_log2 = 6.9314718055994530941723212145818e-01
error = 3.08149e-32 = 0.625 eps
104 iterations.
Test passed.

Test 7.  (Sanity check for exp).
result = 7.3890560989306502272607491793714e+00
exp(2) = 7.3890560989306510475820722180458e+00
   e^2 = 7.3890560989306502272304274605750e+00
 error = 8.20321e-16 = 1.66381e+16 eps
Test FAILED.

Test 8.  (Sanity check for sin / cos).
  r1 = 8.6602540378443864676372317075294e-01
  t1 = 8.6602540378443864676372317075290e-01
  r2 = 5.0000000000000000000000000000000e-01
  t2 = 5.0000000000000000000000000000000e-01
 error = 4.93038e-32 = 1 eps
Test passed.

Testing qd_real ...
sizeof(qd_real) = 32

Test 1.  (Polynomial).
Root Found:  x  = -7.14537727167334897000001611625853728729167441192053388713095053e-01
           p(x) = -5.93472984109987421717077641847622322138810364601246560392486249e-65
Test passed.

Test 2.  (Machin's Formula for Pi).
45 Iterations
13 Iterations
   pi = 3.14159265358979323846264338327950288419716939937510582097494459e+00
  _pi = 3.14159265358979323846264338327950288419716939937510582097494459e+00
error = 3.79823e-65 = 0.03125 eps
Test passed.

Test 3.  (Salamin-Brent Quadratic Formula for Pi).
Iteration  0: 4.00000000000000000000000000000000000000000000000000000000000000e+00
Iteration  1: 3.18767264271210862720192997052536923265105357185936922648763399e+00
Iteration  2: 3.14168029329765329391807042456000938279571943881540283264418946e+00
Iteration  3: 3.14159265389544649600291475881804348610887923726131158965110136e+00
Iteration  4: 3.14159265358979323846636060270663132175770241134242935648684602e+00
Iteration  5: 3.14159265358979323846264338327950288419716994916472660583469612e+00
Iteration  6: 3.14159265358979323846264338327950288419716939937510582097494458e+00
Iteration  7: 3.14159265358979323846264338327950288419716939937510582097494458e+00
         _pi: 3.14159265358979323846264338327950288419716939937510582097494459e+00
       error: 1.69591e-62 = 13.9531 eps
Test passed.

Test 4.  (Borwein Quartic Formula for Pi).
Iteration  0: 2.91421356237309504880168872420969807856967187537694807317667974e+00
Iteration  1: 3.14159264621354228214934443198269577431443722334560279455953948e+00
Iteration  2: 3.14159265358979323846264338327950288419711467828364892155661711e+00
Iteration  3: 3.14159265358979323846264338327950288419716939937510582097494459e+00
Iteration  4: 3.14159265358979323846264338327950288419716939937510582097494459e+00
         _pi: 3.14159265358979323846264338327950288419716939937510582097494459e+00
       error: 7.97628e-64 = 0.65625 eps
Test passed.

Test 5.  (Taylor Series Formula for E).
    e = 2.71828182845904523536028747135266249775724709369995957496696763e+00
   _e = 2.71828182845904523536028747135266249775724709369995957496696763e+00
error = 1.89911e-65 = 0.015625 eps
49 iterations.
Test passed.

Test 6.  (Taylor Series Formula for Log 2).
 log2 = 6.93147180559945309417232121458176568075500134360255254120680009e-01
_log2 = 6.93147180559945309417232121458176568075500134360255254120680010e-01
error = 9.49557e-66 = 0.0078125 eps
209 iterations.
Test passed.

Test 7.  (Sanity check for exp).
result = 7.38905609893065022723042746057500781318031557055184732408712782e+00
exp(2) = 7.38905609893065022723042746057500781318031557055184732408712782e+00
   e^2 = 7.38905609893065022723042746057500781318031557055184732408712782e+00
 error = 8.3561e-64 = 0.6875 eps
Test passed.

Test 8.  (Sanity check for sin / cos).
  r1 = 8.66025403784438646763723170752936183471402626905190314027903490e-01
  t1 = 8.66025403784438646763723170752936183471402626905190314027903490e-01
  r2 = 5.00000000000000000000000000000000000000000000000000000000000000e-01
  t2 = 5.00000000000000000000000000000000000000000000000000000000000000e-01
 error = 5.69734e-65 = 0.046875 eps
Test passed.


Version-Release number of selected component (if applicable):
qd-2.3.14-2.fc20