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/dqMin.decTest b/Lib/test/decimaltestdata/dqMin.decTest
new file mode 100644
index 0000000..9e34694
--- /dev/null
+++ b/Lib/test/decimaltestdata/dqMin.decTest
@@ -0,0 +1,309 @@
+------------------------------------------------------------------------

+-- dqMin.decTest -- decQuad minnum                                    --

+-- 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

+

+-- we assume that base comparison is tested in compare.decTest, so

+-- these mainly cover special cases and rounding

+extended:    1

+clamp:       1

+precision:   34

+maxExponent: 6144

+minExponent: -6143

+rounding:    half_even

+

+-- sanity checks

+dqmin001 min  -2  -2  -> -2

+dqmin002 min  -2  -1  -> -2

+dqmin003 min  -2   0  -> -2

+dqmin004 min  -2   1  -> -2

+dqmin005 min  -2   2  -> -2

+dqmin006 min  -1  -2  -> -2

+dqmin007 min  -1  -1  -> -1

+dqmin008 min  -1   0  -> -1

+dqmin009 min  -1   1  -> -1

+dqmin010 min  -1   2  -> -1

+dqmin011 min   0  -2  -> -2

+dqmin012 min   0  -1  -> -1

+dqmin013 min   0   0  ->  0

+dqmin014 min   0   1  ->  0

+dqmin015 min   0   2  ->  0

+dqmin016 min   1  -2  -> -2

+dqmin017 min   1  -1  -> -1

+dqmin018 min   1   0  ->  0

+dqmin019 min   1   1  ->  1

+dqmin020 min   1   2  ->  1

+dqmin021 min   2  -2  -> -2

+dqmin022 min   2  -1  -> -1

+dqmin023 min   2   0  ->  0

+dqmin025 min   2   1  ->  1

+dqmin026 min   2   2  ->  2

+

+-- extended zeros

+dqmin030 min   0     0   ->  0

+dqmin031 min   0    -0   -> -0

+dqmin032 min   0    -0.0 -> -0.0

+dqmin033 min   0     0.0 ->  0.0

+dqmin034 min  -0     0   -> -0

+dqmin035 min  -0    -0   -> -0

+dqmin036 min  -0    -0.0 -> -0

+dqmin037 min  -0     0.0 -> -0

+dqmin038 min   0.0   0   ->  0.0

+dqmin039 min   0.0  -0   -> -0

+dqmin040 min   0.0  -0.0 -> -0.0

+dqmin041 min   0.0   0.0 ->  0.0

+dqmin042 min  -0.0   0   -> -0.0

+dqmin043 min  -0.0  -0   -> -0

+dqmin044 min  -0.0  -0.0 -> -0.0

+dqmin045 min  -0.0   0.0 -> -0.0

+

+dqmin046 min   0E1  -0E1 -> -0E+1

+dqmin047 min  -0E1   0E2 -> -0E+1

+dqmin048 min   0E2   0E1 ->  0E+1

+dqmin049 min   0E1   0E2 ->  0E+1

+dqmin050 min  -0E3  -0E2 -> -0E+3

+dqmin051 min  -0E2  -0E3 -> -0E+3

+

+-- Specials

+dqmin090 min  Inf  -Inf   -> -Infinity

+dqmin091 min  Inf  -1000  -> -1000

+dqmin092 min  Inf  -1     -> -1

+dqmin093 min  Inf  -0     -> -0

+dqmin094 min  Inf   0     ->  0

+dqmin095 min  Inf   1     ->  1

+dqmin096 min  Inf   1000  ->  1000

+dqmin097 min  Inf   Inf   ->  Infinity

+dqmin098 min -1000  Inf   -> -1000

+dqmin099 min -Inf   Inf   -> -Infinity

+dqmin100 min -1     Inf   -> -1

+dqmin101 min -0     Inf   -> -0

+dqmin102 min  0     Inf   ->  0

+dqmin103 min  1     Inf   ->  1

+dqmin104 min  1000  Inf   ->  1000

+dqmin105 min  Inf   Inf   ->  Infinity

+

+dqmin120 min -Inf  -Inf   -> -Infinity

+dqmin121 min -Inf  -1000  -> -Infinity

+dqmin122 min -Inf  -1     -> -Infinity

+dqmin123 min -Inf  -0     -> -Infinity

+dqmin124 min -Inf   0     -> -Infinity

+dqmin125 min -Inf   1     -> -Infinity

+dqmin126 min -Inf   1000  -> -Infinity

+dqmin127 min -Inf   Inf   -> -Infinity

+dqmin128 min -Inf  -Inf   -> -Infinity

+dqmin129 min -1000 -Inf   -> -Infinity

+dqmin130 min -1    -Inf   -> -Infinity

+dqmin131 min -0    -Inf   -> -Infinity

+dqmin132 min  0    -Inf   -> -Infinity

+dqmin133 min  1    -Inf   -> -Infinity

+dqmin134 min  1000 -Inf   -> -Infinity

+dqmin135 min  Inf  -Inf   -> -Infinity

+

+-- 2004.08.02 754r chooses number over NaN in mixed cases

+dqmin141 min  NaN -Inf    ->  -Infinity

+dqmin142 min  NaN -1000   ->  -1000

+dqmin143 min  NaN -1      ->  -1

+dqmin144 min  NaN -0      ->  -0

+dqmin145 min  NaN  0      ->  0

+dqmin146 min  NaN  1      ->  1

+dqmin147 min  NaN  1000   ->  1000

+dqmin148 min  NaN  Inf    ->  Infinity

+dqmin149 min  NaN  NaN    ->  NaN

+dqmin150 min -Inf  NaN    -> -Infinity

+dqmin151 min -1000 NaN    -> -1000

+dqmin152 min -1   -NaN    -> -1

+dqmin153 min -0    NaN    -> -0

+dqmin154 min  0   -NaN    ->  0

+dqmin155 min  1    NaN    ->  1

+dqmin156 min  1000 NaN    ->  1000

+dqmin157 min  Inf  NaN    ->  Infinity

+

+dqmin161 min  sNaN -Inf   ->  NaN  Invalid_operation

+dqmin162 min  sNaN -1000  ->  NaN  Invalid_operation

+dqmin163 min  sNaN -1     ->  NaN  Invalid_operation

+dqmin164 min  sNaN -0     ->  NaN  Invalid_operation

+dqmin165 min -sNaN  0     -> -NaN  Invalid_operation

+dqmin166 min -sNaN  1     -> -NaN  Invalid_operation

+dqmin167 min  sNaN  1000  ->  NaN  Invalid_operation

+dqmin168 min  sNaN  NaN   ->  NaN  Invalid_operation

+dqmin169 min  sNaN sNaN   ->  NaN  Invalid_operation

+dqmin170 min  NaN  sNaN   ->  NaN  Invalid_operation

+dqmin171 min -Inf  sNaN   ->  NaN  Invalid_operation

+dqmin172 min -1000 sNaN   ->  NaN  Invalid_operation

+dqmin173 min -1    sNaN   ->  NaN  Invalid_operation

+dqmin174 min -0    sNaN   ->  NaN  Invalid_operation

+dqmin175 min  0    sNaN   ->  NaN  Invalid_operation

+dqmin176 min  1    sNaN   ->  NaN  Invalid_operation

+dqmin177 min  1000 sNaN   ->  NaN  Invalid_operation

+dqmin178 min  Inf  sNaN   ->  NaN  Invalid_operation

+dqmin179 min  NaN  sNaN   ->  NaN  Invalid_operation

+

+-- propagating NaNs

+dqmin181 min  NaN9   -Inf   -> -Infinity

+dqmin182 min -NaN8    9990  ->  9990

+dqmin183 min  NaN71   Inf   ->  Infinity

+

+dqmin184 min  NaN1    NaN54 ->  NaN1

+dqmin185 min  NaN22  -NaN53 ->  NaN22

+dqmin186 min -NaN3    NaN6  -> -NaN3

+dqmin187 min -NaN44   NaN7  -> -NaN44

+

+dqmin188 min -Inf     NaN41 -> -Infinity

+dqmin189 min -9999   -NaN33 -> -9999

+dqmin190 min  Inf     NaN2  ->  Infinity

+

+dqmin191 min  sNaN99 -Inf    ->  NaN99 Invalid_operation

+dqmin192 min  sNaN98 -11     ->  NaN98 Invalid_operation

+dqmin193 min -sNaN97  NaN8   -> -NaN97 Invalid_operation

+dqmin194 min  sNaN69 sNaN94  ->  NaN69 Invalid_operation

+dqmin195 min  NaN95  sNaN93  ->  NaN93 Invalid_operation

+dqmin196 min -Inf    sNaN92  ->  NaN92 Invalid_operation

+dqmin197 min  088    sNaN91  ->  NaN91 Invalid_operation

+dqmin198 min  Inf   -sNaN90  -> -NaN90 Invalid_operation

+dqmin199 min  NaN    sNaN86  ->  NaN86 Invalid_operation

+

+-- old rounding checks

+dqmin221 min -12345678000 1  -> -12345678000

+dqmin222 min 1 -12345678000  -> -12345678000

+dqmin223 min -1234567800  1  -> -1234567800

+dqmin224 min 1 -1234567800   -> -1234567800

+dqmin225 min -1234567890  1  -> -1234567890

+dqmin226 min 1 -1234567890   -> -1234567890

+dqmin227 min -1234567891  1  -> -1234567891

+dqmin228 min 1 -1234567891   -> -1234567891

+dqmin229 min -12345678901 1  -> -12345678901

+dqmin230 min 1 -12345678901  -> -12345678901

+dqmin231 min -1234567896  1  -> -1234567896

+dqmin232 min 1 -1234567896   -> -1234567896

+dqmin233 min 1234567891  1   -> 1

+dqmin234 min 1 1234567891    -> 1

+dqmin235 min 12345678901 1   -> 1

+dqmin236 min 1 12345678901   -> 1

+dqmin237 min 1234567896  1   -> 1

+dqmin238 min 1 1234567896    -> 1

+

+-- from examples

+dqmin280 min '3'   '2'  ->  '2'

+dqmin281 min '-10' '3'  ->  '-10'

+dqmin282 min '1.0' '1'  ->  '1.0'

+dqmin283 min '1' '1.0'  ->  '1.0'

+dqmin284 min '7' 'NaN'  ->  '7'

+

+-- expanded list from min/max 754r purple prose

+-- [explicit tests for exponent ordering]

+dqmin401 min  Inf    1.1     ->  1.1

+dqmin402 min  1.1    1       ->  1

+dqmin403 min  1      1.0     ->  1.0

+dqmin404 min  1.0    0.1     ->  0.1

+dqmin405 min  0.1    0.10    ->  0.10

+dqmin406 min  0.10   0.100   ->  0.100

+dqmin407 min  0.10   0       ->  0

+dqmin408 min  0      0.0     ->  0.0

+dqmin409 min  0.0   -0       -> -0

+dqmin410 min  0.0   -0.0     -> -0.0

+dqmin411 min  0.00  -0.0     -> -0.0

+dqmin412 min  0.0   -0.00    -> -0.00

+dqmin413 min  0     -0.0     -> -0.0

+dqmin414 min  0     -0       -> -0

+dqmin415 min -0.0   -0       -> -0

+dqmin416 min -0     -0.100   -> -0.100

+dqmin417 min -0.100 -0.10    -> -0.10

+dqmin418 min -0.10  -0.1     -> -0.1

+dqmin419 min -0.1   -1.0     -> -1.0

+dqmin420 min -1.0   -1       -> -1

+dqmin421 min -1     -1.1     -> -1.1

+dqmin423 min -1.1   -Inf     -> -Infinity

+-- same with operands reversed

+dqmin431 min  1.1    Inf     ->  1.1

+dqmin432 min  1      1.1     ->  1

+dqmin433 min  1.0    1       ->  1.0

+dqmin434 min  0.1    1.0     ->  0.1

+dqmin435 min  0.10   0.1     ->  0.10

+dqmin436 min  0.100  0.10    ->  0.100

+dqmin437 min  0      0.10    ->  0

+dqmin438 min  0.0    0       ->  0.0

+dqmin439 min -0      0.0     -> -0

+dqmin440 min -0.0    0.0     -> -0.0

+dqmin441 min -0.0    0.00    -> -0.0

+dqmin442 min -0.00   0.0     -> -0.00

+dqmin443 min -0.0    0       -> -0.0

+dqmin444 min -0      0       -> -0

+dqmin445 min -0     -0.0     -> -0

+dqmin446 min -0.100 -0       -> -0.100

+dqmin447 min -0.10  -0.100   -> -0.10

+dqmin448 min -0.1   -0.10    -> -0.1

+dqmin449 min -1.0   -0.1     -> -1.0

+dqmin450 min -1     -1.0     -> -1

+dqmin451 min -1.1   -1       -> -1.1

+dqmin453 min -Inf   -1.1     -> -Infinity

+-- largies

+dqmin460 min  1000   1E+3    ->  1000

+dqmin461 min  1E+3   1000    ->  1000

+dqmin462 min  1000  -1E+3    -> -1E+3

+dqmin463 min  1E+3  -384    -> -384

+dqmin464 min -384   1E+3    -> -384

+dqmin465 min -1E+3   1000    -> -1E+3

+dqmin466 min -384  -1E+3    -> -1E+3

+dqmin467 min -1E+3  -384    -> -1E+3

+

+-- misalignment traps for little-endian

+dqmin471 min      1.0       0.1  -> 0.1

+dqmin472 min      0.1       1.0  -> 0.1

+dqmin473 min     10.0       0.1  -> 0.1

+dqmin474 min      0.1      10.0  -> 0.1

+dqmin475 min      100       1.0  -> 1.0

+dqmin476 min      1.0       100  -> 1.0

+dqmin477 min     1000      10.0  -> 10.0

+dqmin478 min     10.0      1000  -> 10.0

+dqmin479 min    10000     100.0  -> 100.0

+dqmin480 min    100.0     10000  -> 100.0

+dqmin481 min   100000    1000.0  -> 1000.0

+dqmin482 min   1000.0    100000  -> 1000.0

+dqmin483 min  1000000   10000.0  -> 10000.0

+dqmin484 min  10000.0   1000000  -> 10000.0

+

+-- subnormals

+dqmin510 min  1.00E-6143       0  ->   0

+dqmin511 min  0.1E-6143        0  ->   0

+dqmin512 min  0.10E-6143       0  ->   0

+dqmin513 min  0.100E-6143      0  ->   0

+dqmin514 min  0.01E-6143       0  ->   0

+dqmin515 min  0.999E-6143      0  ->   0

+dqmin516 min  0.099E-6143      0  ->   0

+dqmin517 min  0.009E-6143      0  ->   0

+dqmin518 min  0.001E-6143      0  ->   0

+dqmin519 min  0.0009E-6143     0  ->   0

+dqmin520 min  0.0001E-6143     0  ->   0

+

+dqmin530 min -1.00E-6143       0  ->  -1.00E-6143

+dqmin531 min -0.1E-6143        0  ->  -1E-6144    Subnormal

+dqmin532 min -0.10E-6143       0  ->  -1.0E-6144  Subnormal

+dqmin533 min -0.100E-6143      0  ->  -1.00E-6144 Subnormal

+dqmin534 min -0.01E-6143       0  ->  -1E-6145    Subnormal

+dqmin535 min -0.999E-6143      0  ->  -9.99E-6144 Subnormal

+dqmin536 min -0.099E-6143      0  ->  -9.9E-6145  Subnormal

+dqmin537 min -0.009E-6143      0  ->  -9E-6146    Subnormal

+dqmin538 min -0.001E-6143      0  ->  -1E-6146    Subnormal

+dqmin539 min -0.0009E-6143     0  ->  -9E-6147    Subnormal

+dqmin540 min -0.0001E-6143     0  ->  -1E-6147    Subnormal

+

+

+-- Null tests

+dqmin900 min 10  # -> NaN Invalid_operation

+dqmin901 min  # 10 -> NaN Invalid_operation