Merged the decimal-branch (revisions 54886 to 58140). Decimal is now
fully updated to the latests Decimal Specification (v1.66) and the
latests test cases (v2.56).
Thanks to Mark Dickinson for all his help during this process.
diff --git a/Lib/test/decimaltestdata/ddNextMinus.decTest b/Lib/test/decimaltestdata/ddNextMinus.decTest
new file mode 100644
index 0000000..97c3b09
--- /dev/null
+++ b/Lib/test/decimaltestdata/ddNextMinus.decTest
@@ -0,0 +1,126 @@
+------------------------------------------------------------------------
+-- ddNextMinus.decTest -- decDouble next that is less [754r nextdown] --
+-- 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: 2.56
+
+-- All operands and results are decDoubles.
+precision: 16
+maxExponent: 384
+minExponent: -383
+extended: 1
+clamp: 1
+rounding: half_even
+
+ddnextm001 nextminus 0.9999999999999995 -> 0.9999999999999994
+ddnextm002 nextminus 0.9999999999999996 -> 0.9999999999999995
+ddnextm003 nextminus 0.9999999999999997 -> 0.9999999999999996
+ddnextm004 nextminus 0.9999999999999998 -> 0.9999999999999997
+ddnextm005 nextminus 0.9999999999999999 -> 0.9999999999999998
+ddnextm006 nextminus 1.000000000000000 -> 0.9999999999999999
+ddnextm007 nextminus 1.0 -> 0.9999999999999999
+ddnextm008 nextminus 1 -> 0.9999999999999999
+ddnextm009 nextminus 1.000000000000001 -> 1.000000000000000
+ddnextm010 nextminus 1.000000000000002 -> 1.000000000000001
+ddnextm011 nextminus 1.000000000000003 -> 1.000000000000002
+ddnextm012 nextminus 1.000000000000004 -> 1.000000000000003
+ddnextm013 nextminus 1.000000000000005 -> 1.000000000000004
+ddnextm014 nextminus 1.000000000000006 -> 1.000000000000005
+ddnextm015 nextminus 1.000000000000007 -> 1.000000000000006
+ddnextm016 nextminus 1.000000000000008 -> 1.000000000000007
+ddnextm017 nextminus 1.000000000000009 -> 1.000000000000008
+ddnextm018 nextminus 1.000000000000010 -> 1.000000000000009
+ddnextm019 nextminus 1.000000000000011 -> 1.000000000000010
+ddnextm020 nextminus 1.000000000000012 -> 1.000000000000011
+
+ddnextm021 nextminus -0.9999999999999995 -> -0.9999999999999996
+ddnextm022 nextminus -0.9999999999999996 -> -0.9999999999999997
+ddnextm023 nextminus -0.9999999999999997 -> -0.9999999999999998
+ddnextm024 nextminus -0.9999999999999998 -> -0.9999999999999999
+ddnextm025 nextminus -0.9999999999999999 -> -1.000000000000000
+ddnextm026 nextminus -1.000000000000000 -> -1.000000000000001
+ddnextm027 nextminus -1.0 -> -1.000000000000001
+ddnextm028 nextminus -1 -> -1.000000000000001
+ddnextm029 nextminus -1.000000000000001 -> -1.000000000000002
+ddnextm030 nextminus -1.000000000000002 -> -1.000000000000003
+ddnextm031 nextminus -1.000000000000003 -> -1.000000000000004
+ddnextm032 nextminus -1.000000000000004 -> -1.000000000000005
+ddnextm033 nextminus -1.000000000000005 -> -1.000000000000006
+ddnextm034 nextminus -1.000000000000006 -> -1.000000000000007
+ddnextm035 nextminus -1.000000000000007 -> -1.000000000000008
+ddnextm036 nextminus -1.000000000000008 -> -1.000000000000009
+ddnextm037 nextminus -1.000000000000009 -> -1.000000000000010
+ddnextm038 nextminus -1.000000000000010 -> -1.000000000000011
+ddnextm039 nextminus -1.000000000000011 -> -1.000000000000012
+
+-- ultra-tiny inputs
+ddnextm062 nextminus 1E-398 -> 0E-398
+ddnextm065 nextminus -1E-398 -> -2E-398
+
+-- Zeros
+ddnextm100 nextminus -0 -> -1E-398
+ddnextm101 nextminus 0 -> -1E-398
+ddnextm102 nextminus 0.00 -> -1E-398
+ddnextm103 nextminus -0.00 -> -1E-398
+ddnextm104 nextminus 0E-300 -> -1E-398
+ddnextm105 nextminus 0E+300 -> -1E-398
+ddnextm106 nextminus 0E+30000 -> -1E-398
+ddnextm107 nextminus -0E+30000 -> -1E-398
+
+-- specials
+ddnextm150 nextminus Inf -> 9.999999999999999E+384
+ddnextm151 nextminus -Inf -> -Infinity
+ddnextm152 nextminus NaN -> NaN
+ddnextm153 nextminus sNaN -> NaN Invalid_operation
+ddnextm154 nextminus NaN77 -> NaN77
+ddnextm155 nextminus sNaN88 -> NaN88 Invalid_operation
+ddnextm156 nextminus -NaN -> -NaN
+ddnextm157 nextminus -sNaN -> -NaN Invalid_operation
+ddnextm158 nextminus -NaN77 -> -NaN77
+ddnextm159 nextminus -sNaN88 -> -NaN88 Invalid_operation
+
+-- Nmax, Nmin, Ntiny, subnormals
+ddnextm170 nextminus 9.999999999999999E+384 -> 9.999999999999998E+384
+ddnextm171 nextminus 9.999999999999998E+384 -> 9.999999999999997E+384
+ddnextm172 nextminus 1E-383 -> 9.99999999999999E-384
+ddnextm173 nextminus 1.000000000000000E-383 -> 9.99999999999999E-384
+ddnextm174 nextminus 9E-398 -> 8E-398
+ddnextm175 nextminus 9.9E-397 -> 9.8E-397
+ddnextm176 nextminus 9.99999999999E-387 -> 9.99999999998E-387
+ddnextm177 nextminus 9.99999999999999E-384 -> 9.99999999999998E-384
+ddnextm178 nextminus 9.99999999999998E-384 -> 9.99999999999997E-384
+ddnextm179 nextminus 9.99999999999997E-384 -> 9.99999999999996E-384
+ddnextm180 nextminus 0E-398 -> -1E-398
+ddnextm181 nextminus 1E-398 -> 0E-398
+ddnextm182 nextminus 2E-398 -> 1E-398
+
+ddnextm183 nextminus -0E-398 -> -1E-398
+ddnextm184 nextminus -1E-398 -> -2E-398
+ddnextm185 nextminus -2E-398 -> -3E-398
+ddnextm186 nextminus -10E-398 -> -1.1E-397
+ddnextm187 nextminus -100E-398 -> -1.01E-396
+ddnextm188 nextminus -100000E-398 -> -1.00001E-393
+ddnextm189 nextminus -1.00000000000E-383 -> -1.000000000000001E-383
+ddnextm190 nextminus -1.000000000000000E-383 -> -1.000000000000001E-383
+ddnextm191 nextminus -1E-383 -> -1.000000000000001E-383
+ddnextm192 nextminus -9.999999999999998E+384 -> -9.999999999999999E+384
+ddnextm193 nextminus -9.999999999999999E+384 -> -Infinity
+
+-- Null tests
+ddnextm900 nextminus # -> NaN Invalid_operation
+