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/ddAbs.decTest b/Lib/test/decimaltestdata/ddAbs.decTest
new file mode 100644
index 0000000..4da662c
--- /dev/null
+++ b/Lib/test/decimaltestdata/ddAbs.decTest
@@ -0,0 +1,126 @@
+------------------------------------------------------------------------
+-- ddAbs.decTest -- decDouble absolute value, heeding sNaN --
+-- 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
+
+precision: 16
+maxExponent: 384
+minExponent: -383
+extended: 1
+clamp: 1
+rounding: half_even
+
+ddabs001 abs '1' -> '1'
+ddabs002 abs '-1' -> '1'
+ddabs003 abs '1.00' -> '1.00'
+ddabs004 abs '-1.00' -> '1.00'
+ddabs005 abs '0' -> '0'
+ddabs006 abs '0.00' -> '0.00'
+ddabs007 abs '00.0' -> '0.0'
+ddabs008 abs '00.00' -> '0.00'
+ddabs009 abs '00' -> '0'
+
+ddabs010 abs '-2' -> '2'
+ddabs011 abs '2' -> '2'
+ddabs012 abs '-2.00' -> '2.00'
+ddabs013 abs '2.00' -> '2.00'
+ddabs014 abs '-0' -> '0'
+ddabs015 abs '-0.00' -> '0.00'
+ddabs016 abs '-00.0' -> '0.0'
+ddabs017 abs '-00.00' -> '0.00'
+ddabs018 abs '-00' -> '0'
+
+ddabs020 abs '-2000000' -> '2000000'
+ddabs021 abs '2000000' -> '2000000'
+
+ddabs030 abs '+0.1' -> '0.1'
+ddabs031 abs '-0.1' -> '0.1'
+ddabs032 abs '+0.01' -> '0.01'
+ddabs033 abs '-0.01' -> '0.01'
+ddabs034 abs '+0.001' -> '0.001'
+ddabs035 abs '-0.001' -> '0.001'
+ddabs036 abs '+0.000001' -> '0.000001'
+ddabs037 abs '-0.000001' -> '0.000001'
+ddabs038 abs '+0.000000000001' -> '1E-12'
+ddabs039 abs '-0.000000000001' -> '1E-12'
+
+-- examples from decArith
+ddabs040 abs '2.1' -> '2.1'
+ddabs041 abs '-100' -> '100'
+ddabs042 abs '101.5' -> '101.5'
+ddabs043 abs '-101.5' -> '101.5'
+
+-- more fixed, potential LHS swaps/overlays if done by subtract 0
+ddabs060 abs '-56267E-10' -> '0.0000056267'
+ddabs061 abs '-56267E-5' -> '0.56267'
+ddabs062 abs '-56267E-2' -> '562.67'
+ddabs063 abs '-56267E-1' -> '5626.7'
+ddabs065 abs '-56267E-0' -> '56267'
+
+-- subnormals and underflow
+
+-- long operand tests
+ddabs321 abs 1234567890123456 -> 1234567890123456
+ddabs322 abs 12345678000 -> 12345678000
+ddabs323 abs 1234567800 -> 1234567800
+ddabs324 abs 1234567890 -> 1234567890
+ddabs325 abs 1234567891 -> 1234567891
+ddabs326 abs 12345678901 -> 12345678901
+ddabs327 abs 1234567896 -> 1234567896
+
+-- zeros
+ddabs111 abs 0 -> 0
+ddabs112 abs -0 -> 0
+ddabs113 abs 0E+6 -> 0E+6
+ddabs114 abs -0E+6 -> 0E+6
+ddabs115 abs 0.0000 -> 0.0000
+ddabs116 abs -0.0000 -> 0.0000
+ddabs117 abs 0E-141 -> 0E-141
+ddabs118 abs -0E-141 -> 0E-141
+
+-- full coefficients, alternating bits
+ddabs121 abs 2682682682682682 -> 2682682682682682
+ddabs122 abs -2682682682682682 -> 2682682682682682
+ddabs123 abs 1341341341341341 -> 1341341341341341
+ddabs124 abs -1341341341341341 -> 1341341341341341
+
+-- Nmax, Nmin, Ntiny
+ddabs131 abs 9.999999999999999E+384 -> 9.999999999999999E+384
+ddabs132 abs 1E-383 -> 1E-383
+ddabs133 abs 1.000000000000000E-383 -> 1.000000000000000E-383
+ddabs134 abs 1E-398 -> 1E-398 Subnormal
+
+ddabs135 abs -1E-398 -> 1E-398 Subnormal
+ddabs136 abs -1.000000000000000E-383 -> 1.000000000000000E-383
+ddabs137 abs -1E-383 -> 1E-383
+ddabs138 abs -9.999999999999999E+384 -> 9.999999999999999E+384
+
+-- specials
+ddabs520 abs 'Inf' -> 'Infinity'
+ddabs521 abs '-Inf' -> 'Infinity'
+ddabs522 abs NaN -> NaN
+ddabs523 abs sNaN -> NaN Invalid_operation
+ddabs524 abs NaN22 -> NaN22
+ddabs525 abs sNaN33 -> NaN33 Invalid_operation
+ddabs526 abs -NaN22 -> -NaN22
+ddabs527 abs -sNaN33 -> -NaN33 Invalid_operation
+
+-- Null tests
+ddabs900 abs # -> NaN Invalid_operation
+