Move Decimal from the sandbox into production.
diff --git a/Lib/test/decimaltestdata/max.decTest b/Lib/test/decimaltestdata/max.decTest
new file mode 100644
index 0000000..cb4e5cf
--- /dev/null
+++ b/Lib/test/decimaltestdata/max.decTest
@@ -0,0 +1,300 @@
+------------------------------------------------------------------------
+-- max.decTest -- decimal maximum                                     --
+-- Copyright (c) IBM Corporation, 1981, 2004.  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: 2.38
+
+-- we assume that base comparison is tested in compare.decTest, so
+-- these mainly cover special cases and rounding
+
+extended:    1
+precision:   9
+rounding:    half_up
+maxExponent: 384
+minexponent: -383
+
+-- sanity checks
+maxx001 max  -2  -2  -> -2
+maxx002 max  -2  -1  -> -1
+maxx003 max  -2   0  ->  0
+maxx004 max  -2   1  ->  1
+maxx005 max  -2   2  ->  2
+maxx006 max  -1  -2  -> -1
+maxx007 max  -1  -1  -> -1
+maxx008 max  -1   0  ->  0
+maxx009 max  -1   1  ->  1
+maxx010 max  -1   2  ->  2
+maxx011 max   0  -2  ->  0
+maxx012 max   0  -1  ->  0
+maxx013 max   0   0  ->  0
+maxx014 max   0   1  ->  1
+maxx015 max   0   2  ->  2
+maxx016 max   1  -2  ->  1
+maxx017 max   1  -1  ->  1
+maxx018 max   1   0  ->  1
+maxx019 max   1   1  ->  1
+maxx020 max   1   2  ->  2
+maxx021 max   2  -2  ->  2
+maxx022 max   2  -1  ->  2
+maxx023 max   2   0  ->  2
+maxx025 max   2   1  ->  2
+maxx026 max   2   2  ->  2
+
+-- extended zeros
+maxx030 max   0     0   ->  0
+maxx031 max   0    -0   ->  0
+maxx032 max   0    -0.0 ->  0
+maxx033 max   0     0.0 ->  0
+maxx034 max  -0     0   -> -0    -- note: -0 = 0
+maxx035 max  -0    -0   -> -0
+maxx036 max  -0    -0.0 -> -0
+maxx037 max  -0     0.0 -> -0
+maxx038 max   0.0   0   ->  0.0
+maxx039 max   0.0  -0   ->  0.0
+maxx040 max   0.0  -0.0 ->  0.0
+maxx041 max   0.0   0.0 ->  0.0
+maxx042 max  -0.0   0   -> -0.0
+maxx043 max  -0.0  -0   -> -0.0
+maxx044 max  -0.0  -0.0 -> -0.0
+maxx045 max  -0.0   0.0 -> -0.0
+
+maxx046 max  -0E1   0E2 -> -0E+1
+maxx047 max   0E2   0E1 ->  0E+2
+maxx048 max   0E1   0E2 ->  0E+1
+maxx049 max  -0E3  -0E2 -> -0E+3
+
+
+-- Specials
+precision: 9
+maxx090 max  Inf  -Inf   ->  Infinity
+maxx091 max  Inf  -1000  ->  Infinity
+maxx092 max  Inf  -1     ->  Infinity
+maxx093 max  Inf  -0     ->  Infinity
+maxx094 max  Inf   0     ->  Infinity
+maxx095 max  Inf   1     ->  Infinity
+maxx096 max  Inf   1000  ->  Infinity
+maxx097 max  Inf   Inf   ->  Infinity
+maxx098 max -1000  Inf   ->  Infinity
+maxx099 max -Inf   Inf   ->  Infinity
+maxx100 max -1     Inf   ->  Infinity
+maxx101 max -0     Inf   ->  Infinity
+maxx102 max  0     Inf   ->  Infinity
+maxx103 max  1     Inf   ->  Infinity
+maxx104 max  1000  Inf   ->  Infinity
+maxx105 max  Inf   Inf   ->  Infinity
+
+maxx120 max -Inf  -Inf   -> -Infinity
+maxx121 max -Inf  -1000  -> -1000
+maxx122 max -Inf  -1     -> -1
+maxx123 max -Inf  -0     -> -0
+maxx124 max -Inf   0     ->  0
+maxx125 max -Inf   1     ->  1
+maxx126 max -Inf   1000  ->  1000
+maxx127 max -Inf   Inf   ->  Infinity
+maxx128 max -Inf  -Inf   ->  -Infinity
+maxx129 max -1000 -Inf   ->  -1000
+maxx130 max -1    -Inf   ->  -1
+maxx131 max -0    -Inf   ->  -0
+maxx132 max  0    -Inf   ->  0
+maxx133 max  1    -Inf   ->  1
+maxx134 max  1000 -Inf   ->  1000
+maxx135 max  Inf  -Inf   ->  Infinity
+
+maxx141 max  NaN -Inf    ->  NaN
+maxx142 max  NaN -1000   ->  NaN
+maxx143 max  NaN -1      ->  NaN
+maxx144 max  NaN -0      ->  NaN
+maxx145 max  NaN  0      ->  NaN
+maxx146 max  NaN  1      ->  NaN
+maxx147 max  NaN  1000   ->  NaN
+maxx148 max  NaN  Inf    ->  NaN
+maxx149 max  NaN  NaN    ->  NaN
+maxx150 max -Inf  NaN    ->  NaN
+maxx151 max -1000 NaN    ->  NaN
+maxx152 max -1    NaN    ->  NaN
+maxx153 max -0    NaN    ->  NaN
+maxx154 max  0    NaN    ->  NaN
+maxx155 max  1    NaN    ->  NaN
+maxx156 max  1000 NaN    ->  NaN
+maxx157 max  Inf  NaN    ->  NaN
+
+maxx161 max  sNaN -Inf   ->  NaN  Invalid_operation
+maxx162 max  sNaN -1000  ->  NaN  Invalid_operation
+maxx163 max  sNaN -1     ->  NaN  Invalid_operation
+maxx164 max  sNaN -0     ->  NaN  Invalid_operation
+maxx165 max  sNaN  0     ->  NaN  Invalid_operation
+maxx166 max  sNaN  1     ->  NaN  Invalid_operation
+maxx167 max  sNaN  1000  ->  NaN  Invalid_operation
+maxx168 max  sNaN  NaN   ->  NaN  Invalid_operation
+maxx169 max  sNaN sNaN   ->  NaN  Invalid_operation
+maxx170 max  NaN  sNaN   ->  NaN  Invalid_operation
+maxx171 max -Inf  sNaN   ->  NaN  Invalid_operation
+maxx172 max -1000 sNaN   ->  NaN  Invalid_operation
+maxx173 max -1    sNaN   ->  NaN  Invalid_operation
+maxx174 max -0    sNaN   ->  NaN  Invalid_operation
+maxx175 max  0    sNaN   ->  NaN  Invalid_operation
+maxx176 max  1    sNaN   ->  NaN  Invalid_operation
+maxx177 max  1000 sNaN   ->  NaN  Invalid_operation
+maxx178 max  Inf  sNaN   ->  NaN  Invalid_operation
+maxx179 max  NaN  sNaN   ->  NaN  Invalid_operation
+
+-- propagating NaNs
+maxx181 max  NaN9 -Inf   ->  NaN9
+maxx182 max  NaN8    9   ->  NaN8
+maxx183 max -NaN7  Inf   -> -NaN7
+maxx184 max  NaN6  NaN5  ->  NaN6
+maxx185 max -Inf   NaN4  ->  NaN4
+maxx186 max -9    -NaN3  -> -NaN3
+maxx187 max  Inf   NaN2  ->  NaN2
+
+maxx191 max  sNaN99 -Inf    ->  NaN99 Invalid_operation
+maxx192 max  sNaN98 -1      ->  NaN98 Invalid_operation
+maxx193 max -sNaN97  NaN    -> -NaN97 Invalid_operation
+maxx194 max  sNaN96 sNaN94  ->  NaN96 Invalid_operation
+maxx195 max  NaN95  sNaN93  ->  NaN93 Invalid_operation
+maxx196 max -Inf    sNaN92  ->  NaN92 Invalid_operation
+maxx197 max  0      sNaN91  ->  NaN91 Invalid_operation
+maxx198 max  Inf   -sNaN90  -> -NaN90 Invalid_operation
+maxx199 max  NaN    sNaN89  ->  NaN89 Invalid_operation
+
+-- rounding checks
+maxexponent: 999
+minexponent: -999
+precision: 9
+maxx201 max 12345678000 1  -> 1.23456780E+10 Rounded
+maxx202 max 1 12345678000  -> 1.23456780E+10 Rounded
+maxx203 max 1234567800  1  -> 1.23456780E+9 Rounded
+maxx204 max 1 1234567800   -> 1.23456780E+9 Rounded
+maxx205 max 1234567890  1  -> 1.23456789E+9 Rounded
+maxx206 max 1 1234567890   -> 1.23456789E+9 Rounded
+maxx207 max 1234567891  1  -> 1.23456789E+9 Inexact Rounded
+maxx208 max 1 1234567891   -> 1.23456789E+9 Inexact Rounded
+maxx209 max 12345678901 1  -> 1.23456789E+10 Inexact Rounded
+maxx210 max 1 12345678901  -> 1.23456789E+10 Inexact Rounded
+maxx211 max 1234567896  1  -> 1.23456790E+9 Inexact Rounded
+maxx212 max 1 1234567896   -> 1.23456790E+9 Inexact Rounded
+maxx213 max -1234567891  1 -> 1
+maxx214 max 1 -1234567891  -> 1
+maxx215 max -12345678901 1 -> 1
+maxx216 max 1 -12345678901 -> 1
+maxx217 max -1234567896  1 -> 1
+maxx218 max 1 -1234567896  -> 1
+
+precision: 15
+maxx221 max 12345678000 1  -> 12345678000
+maxx222 max 1 12345678000  -> 12345678000
+maxx223 max 1234567800  1  -> 1234567800
+maxx224 max 1 1234567800   -> 1234567800
+maxx225 max 1234567890  1  -> 1234567890
+maxx226 max 1 1234567890   -> 1234567890
+maxx227 max 1234567891  1  -> 1234567891
+maxx228 max 1 1234567891   -> 1234567891
+maxx229 max 12345678901 1  -> 12345678901
+maxx230 max 1 12345678901  -> 12345678901
+maxx231 max 1234567896  1  -> 1234567896
+maxx232 max 1 1234567896   -> 1234567896
+maxx233 max -1234567891  1 -> 1
+maxx234 max 1 -1234567891  -> 1
+maxx235 max -12345678901 1 -> 1
+maxx236 max 1 -12345678901 -> 1
+maxx237 max -1234567896  1 -> 1
+maxx238 max 1 -1234567896  -> 1
+
+-- from examples
+maxx280 max '3'   '2'  ->  '3'
+maxx281 max '-10' '3'  ->  '3'
+maxx282 max '1.0' '1'  ->  '1.0'
+maxx283 max '1' '1.0'  ->  '1'
+
+-- overflow and underflow tests ...
+maxExponent: 999999999
+minexponent: -999999999
+maxx330 max +1.23456789012345E-0 9E+999999999 ->  9E+999999999
+maxx331 max 9E+999999999 +1.23456789012345E-0 ->  9E+999999999
+maxx332 max +0.100 9E-999999999               ->  0.100
+maxx333 max 9E-999999999 +0.100               ->  0.100
+maxx335 max -1.23456789012345E-0 9E+999999999 ->  9E+999999999
+maxx336 max 9E+999999999 -1.23456789012345E-0 ->  9E+999999999
+maxx337 max -0.100 9E-999999999               ->  9E-999999999
+maxx338 max 9E-999999999 -0.100               ->  9E-999999999
+
+maxx339 max 1e-599999999 1e-400000001   ->  1E-400000001
+maxx340 max 1e-599999999 1e-400000000   ->  1E-400000000
+maxx341 max 1e-600000000 1e-400000000   ->  1E-400000000
+maxx342 max 9e-999999998 0.01           ->  0.01
+maxx343 max 9e-999999998 0.1            ->  0.1
+maxx344 max 0.01 9e-999999998           ->  0.01
+maxx345 max 1e599999999 1e400000001     ->  1E+599999999
+maxx346 max 1e599999999 1e400000000     ->  1E+599999999
+maxx347 max 1e600000000 1e400000000     ->  1E+600000000
+maxx348 max 9e999999998 100             ->  9E+999999998
+maxx349 max 9e999999998 10              ->  9E+999999998
+maxx350 max 100  9e999999998            ->  9E+999999998
+-- signs
+maxx351 max  1e+777777777  1e+411111111 ->  1E+777777777
+maxx352 max  1e+777777777 -1e+411111111 ->  1E+777777777
+maxx353 max -1e+777777777  1e+411111111 ->  1E+411111111
+maxx354 max -1e+777777777 -1e+411111111 -> -1E+411111111
+maxx355 max  1e-777777777  1e-411111111 ->  1E-411111111
+maxx356 max  1e-777777777 -1e-411111111 ->  1E-777777777
+maxx357 max -1e-777777777  1e-411111111 ->  1E-411111111
+maxx358 max -1e-777777777 -1e-411111111 -> -1E-777777777
+
+
+-- overflow tests
+maxexponent: 999999999
+minexponent: -999999999
+precision: 3
+maxx400 max 9.999E+999999999  0 ->  Infinity Inexact Overflow Rounded
+maxx401 max -9.999E+999999999 0 ->  0
+
+-- subnormals and underflow
+precision: 3
+maxexponent: 999
+minexponent: -999
+maxx410 max  1.00E-999       0  ->   1.00E-999
+maxx411 max  0.1E-999        0  ->   1E-1000   Subnormal
+maxx412 max  0.10E-999       0  ->   1.0E-1000 Subnormal
+maxx413 max  0.100E-999      0  ->   1.0E-1000 Subnormal Rounded
+maxx414 max  0.01E-999       0  ->   1E-1001   Subnormal
+-- next is rounded to Emin
+maxx415 max  0.999E-999      0  ->   1.00E-999 Inexact Rounded Subnormal Underflow
+maxx416 max  0.099E-999      0  ->   1.0E-1000 Inexact Rounded Subnormal Underflow
+maxx417 max  0.009E-999      0  ->   1E-1001   Inexact Rounded Subnormal Underflow
+maxx418 max  0.001E-999      0  ->   0E-1001   Inexact Rounded Subnormal Underflow
+maxx419 max  0.0009E-999     0  ->   0E-1001   Inexact Rounded Subnormal Underflow
+maxx420 max  0.0001E-999     0  ->   0E-1001   Inexact Rounded Subnormal Underflow
+
+maxx430 max -1.00E-999       0  ->   0
+maxx431 max -0.1E-999        0  ->   0
+maxx432 max -0.10E-999       0  ->   0
+maxx433 max -0.100E-999      0  ->   0
+maxx434 max -0.01E-999       0  ->   0
+maxx435 max -0.999E-999      0  ->   0
+maxx436 max -0.099E-999      0  ->   0
+maxx437 max -0.009E-999      0  ->   0
+maxx438 max -0.001E-999      0  ->   0
+maxx439 max -0.0009E-999     0  ->   0
+maxx440 max -0.0001E-999     0  ->   0
+
+-- Null tests
+maxx900 max 10  #  -> NaN Invalid_operation
+maxx901 max  # 10  -> NaN Invalid_operation
+
+
+