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
+
+
+