Decimal module and test cases were updated to their state of
the art. It now complies latest specification and tests.
The only difference of this version with the one in the trunk
is that a small subset that hash tests were removed, because
they rely on modifications to core hash() function (see
issue 1182 for further details).
diff --git a/Lib/test/decimaltestdata/ddPlus.decTest b/Lib/test/decimaltestdata/ddPlus.decTest
new file mode 100644
index 0000000..0a2b838
--- /dev/null
+++ b/Lib/test/decimaltestdata/ddPlus.decTest
@@ -0,0 +1,88 @@
+------------------------------------------------------------------------
+-- ddPlus.decTest -- decDouble 0+x --
+-- Copyright (c) IBM Corporation, 1981, 2007. All rights reserved. --
+------------------------------------------------------------------------
+-- Please see the document "General Decimal Arithmetic Testcases" --
+-- at http://www2.hursley.ibm.com/decimal for the description of --
+-- these testcases. --
+-- --
+-- These testcases are experimental ('beta' versions), and they --
+-- may contain errors. They are offered on an as-is basis. In --
+-- particular, achieving the same results as the tests here is not --
+-- a guarantee that an implementation complies with any Standard --
+-- or specification. The tests are not exhaustive. --
+-- --
+-- Please send comments, suggestions, and corrections to the author: --
+-- Mike Cowlishaw, IBM Fellow --
+-- IBM UK, PO Box 31, Birmingham Road, Warwick CV34 5JL, UK --
+-- mfc@uk.ibm.com --
+------------------------------------------------------------------------
+version: 2.57
+
+-- All operands and results are decDoubles.
+precision: 16
+maxExponent: 384
+minExponent: -383
+extended: 1
+clamp: 1
+rounding: half_even
+
+-- Sanity check
+ddpls001 plus +7.50 -> 7.50
+
+-- Infinities
+ddpls011 plus Infinity -> Infinity
+ddpls012 plus -Infinity -> -Infinity
+
+-- NaNs, 0 payload
+ddpls021 plus NaN -> NaN
+ddpls022 plus -NaN -> -NaN
+ddpls023 plus sNaN -> NaN Invalid_operation
+ddpls024 plus -sNaN -> -NaN Invalid_operation
+
+-- NaNs, non-0 payload
+ddpls031 plus NaN13 -> NaN13
+ddpls032 plus -NaN13 -> -NaN13
+ddpls033 plus sNaN13 -> NaN13 Invalid_operation
+ddpls034 plus -sNaN13 -> -NaN13 Invalid_operation
+ddpls035 plus NaN70 -> NaN70
+ddpls036 plus -NaN70 -> -NaN70
+ddpls037 plus sNaN101 -> NaN101 Invalid_operation
+ddpls038 plus -sNaN101 -> -NaN101 Invalid_operation
+
+-- finites
+ddpls101 plus 7 -> 7
+ddpls102 plus -7 -> -7
+ddpls103 plus 75 -> 75
+ddpls104 plus -75 -> -75
+ddpls105 plus 7.50 -> 7.50
+ddpls106 plus -7.50 -> -7.50
+ddpls107 plus 7.500 -> 7.500
+ddpls108 plus -7.500 -> -7.500
+
+-- zeros
+ddpls111 plus 0 -> 0
+ddpls112 plus -0 -> 0
+ddpls113 plus 0E+4 -> 0E+4
+ddpls114 plus -0E+4 -> 0E+4
+ddpls115 plus 0.0000 -> 0.0000
+ddpls116 plus -0.0000 -> 0.0000
+ddpls117 plus 0E-141 -> 0E-141
+ddpls118 plus -0E-141 -> 0E-141
+
+-- full coefficients, alternating bits
+ddpls121 plus 2682682682682682 -> 2682682682682682
+ddpls122 plus -2682682682682682 -> -2682682682682682
+ddpls123 plus 1341341341341341 -> 1341341341341341
+ddpls124 plus -1341341341341341 -> -1341341341341341
+
+-- Nmax, Nmin, Ntiny
+ddpls131 plus 9.999999999999999E+384 -> 9.999999999999999E+384
+ddpls132 plus 1E-383 -> 1E-383
+ddpls133 plus 1.000000000000000E-383 -> 1.000000000000000E-383
+ddpls134 plus 1E-398 -> 1E-398 Subnormal
+
+ddpls135 plus -1E-398 -> -1E-398 Subnormal
+ddpls136 plus -1.000000000000000E-383 -> -1.000000000000000E-383
+ddpls137 plus -1E-383 -> -1E-383
+ddpls138 plus -9.999999999999999E+384 -> -9.999999999999999E+384