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      1 ------------------------------------------------------------------------
      2 -- ddNextToward.decTest -- decDouble next toward rhs [754r nextafter] --
      3 -- Copyright (c) IBM Corporation, 1981, 2008.  All rights reserved.   --
      4 ------------------------------------------------------------------------
      5 -- Please see the document "General Decimal Arithmetic Testcases"     --
      6 -- at http://www2.hursley.ibm.com/decimal for the description of      --
      7 -- these testcases.                                                   --
      8 --                                                                    --
      9 -- These testcases are experimental ('beta' versions), and they       --
     10 -- may contain errors.  They are offered on an as-is basis.  In       --
     11 -- particular, achieving the same results as the tests here is not    --
     12 -- a guarantee that an implementation complies with any Standard      --
     13 -- or specification.  The tests are not exhaustive.                   --
     14 --                                                                    --
     15 -- Please send comments, suggestions, and corrections to the author:  --
     16 --   Mike Cowlishaw, IBM Fellow                                       --
     17 --   IBM UK, PO Box 31, Birmingham Road, Warwick CV34 5JL, UK         --
     18 --   mfc (a] uk.ibm.com                                                   --
     19 ------------------------------------------------------------------------
     20 version: 2.59
     21 
     22 -- All operands and results are decDoubles.
     23 precision:   16
     24 maxExponent: 384
     25 minExponent: -383
     26 extended:    1
     27 clamp:       1
     28 rounding:    half_even
     29 
     30 -- Sanity check with a scattering of numerics
     31 ddnextt001 nexttoward   10    10   ->  10
     32 ddnextt002 nexttoward  -10   -10   -> -10
     33 ddnextt003 nexttoward   1     10   ->  1.000000000000001
     34 ddnextt004 nexttoward   1    -10   ->  0.9999999999999999
     35 ddnextt005 nexttoward  -1     10   -> -0.9999999999999999
     36 ddnextt006 nexttoward  -1    -10   -> -1.000000000000001
     37 ddnextt007 nexttoward   0     10   ->  1E-398       Underflow Subnormal Inexact Rounded
     38 ddnextt008 nexttoward   0    -10   -> -1E-398       Underflow Subnormal Inexact Rounded
     39 ddnextt009 nexttoward   9.999999999999999E+384 +Infinity ->  Infinity Overflow Inexact Rounded
     40 ddnextt010 nexttoward  -9.999999999999999E+384 -Infinity -> -Infinity Overflow Inexact Rounded
     41 ddnextt011 nexttoward       9.999999999999999  10  ->  10.00000000000000
     42 ddnextt012 nexttoward   10  9.999999999999999      ->  9.999999999999999
     43 ddnextt013 nexttoward      -9.999999999999999 -10  -> -10.00000000000000
     44 ddnextt014 nexttoward  -10 -9.999999999999999      -> -9.999999999999999
     45 ddnextt015 nexttoward       9.999999999999998  10  ->  9.999999999999999
     46 ddnextt016 nexttoward   10  9.999999999999998      ->  9.999999999999999
     47 ddnextt017 nexttoward      -9.999999999999998 -10  -> -9.999999999999999
     48 ddnextt018 nexttoward  -10 -9.999999999999998      -> -9.999999999999999
     49 
     50 ------- lhs=rhs
     51 -- finites
     52 ddnextt101 nexttoward          7       7 ->  7
     53 ddnextt102 nexttoward         -7      -7 -> -7
     54 ddnextt103 nexttoward         75      75 ->  75
     55 ddnextt104 nexttoward        -75     -75 -> -75
     56 ddnextt105 nexttoward       7.50     7.5 ->  7.50
     57 ddnextt106 nexttoward      -7.50   -7.50 -> -7.50
     58 ddnextt107 nexttoward       7.500 7.5000 ->  7.500
     59 ddnextt108 nexttoward      -7.500   -7.5 -> -7.500
     60 
     61 -- zeros
     62 ddnextt111 nexttoward          0       0 ->  0
     63 ddnextt112 nexttoward         -0      -0 -> -0
     64 ddnextt113 nexttoward       0E+4       0 ->  0E+4
     65 ddnextt114 nexttoward      -0E+4      -0 -> -0E+4
     66 ddnextt115 nexttoward     0.00000000000   0.000000000000 ->  0E-11
     67 ddnextt116 nexttoward    -0.00000000000  -0.00           -> -0E-11
     68 ddnextt117 nexttoward      0E-141      0 ->  0E-141
     69 ddnextt118 nexttoward     -0E-141   -000 -> -0E-141
     70 
     71 -- full coefficients, alternating bits
     72 ddnextt121 nexttoward   268268268    268268268 ->   268268268
     73 ddnextt122 nexttoward  -268268268   -268268268 ->  -268268268
     74 ddnextt123 nexttoward   134134134    134134134 ->   134134134
     75 ddnextt124 nexttoward  -134134134   -134134134 ->  -134134134
     76 
     77 -- Nmax, Nmin, Ntiny
     78 ddnextt131 nexttoward  9.999999999999999E+384  9.999999999999999E+384   ->   9.999999999999999E+384
     79 ddnextt132 nexttoward  1E-383           1E-383            ->   1E-383
     80 ddnextt133 nexttoward  1.000000000000000E-383  1.000000000000000E-383   ->   1.000000000000000E-383
     81 ddnextt134 nexttoward  1E-398           1E-398            ->   1E-398
     82 
     83 ddnextt135 nexttoward  -1E-398          -1E-398           ->  -1E-398
     84 ddnextt136 nexttoward  -1.000000000000000E-383 -1.000000000000000E-383  ->  -1.000000000000000E-383
     85 ddnextt137 nexttoward  -1E-383          -1E-383           ->  -1E-383
     86 ddnextt138 nexttoward  -9.999999999999999E+384 -9.999999999999999E+384  ->  -9.999999999999999E+384
     87 
     88 ------- lhs<rhs
     89 ddnextt201 nexttoward  0.9999999999999995 Infinity ->   0.9999999999999996
     90 ddnextt202 nexttoward  0.9999999999999996 Infinity ->   0.9999999999999997
     91 ddnextt203 nexttoward  0.9999999999999997 Infinity ->   0.9999999999999998
     92 ddnextt204 nexttoward  0.9999999999999998 Infinity ->   0.9999999999999999
     93 ddnextt205 nexttoward  0.9999999999999999 Infinity ->   1.000000000000000
     94 ddnextt206 nexttoward  1.000000000000000  Infinity ->   1.000000000000001
     95 ddnextt207 nexttoward  1.0         Infinity ->   1.000000000000001
     96 ddnextt208 nexttoward  1           Infinity ->   1.000000000000001
     97 ddnextt209 nexttoward  1.000000000000001  Infinity ->   1.000000000000002
     98 ddnextt210 nexttoward  1.000000000000002  Infinity ->   1.000000000000003
     99 ddnextt211 nexttoward  1.000000000000003  Infinity ->   1.000000000000004
    100 ddnextt212 nexttoward  1.000000000000004  Infinity ->   1.000000000000005
    101 ddnextt213 nexttoward  1.000000000000005  Infinity ->   1.000000000000006
    102 ddnextt214 nexttoward  1.000000000000006  Infinity ->   1.000000000000007
    103 ddnextt215 nexttoward  1.000000000000007  Infinity ->   1.000000000000008
    104 ddnextt216 nexttoward  1.000000000000008  Infinity ->   1.000000000000009
    105 ddnextt217 nexttoward  1.000000000000009  Infinity ->   1.000000000000010
    106 ddnextt218 nexttoward  1.000000000000010  Infinity ->   1.000000000000011
    107 ddnextt219 nexttoward  1.000000000000011  Infinity ->   1.000000000000012
    108 
    109 ddnextt221 nexttoward -0.9999999999999995 Infinity ->  -0.9999999999999994
    110 ddnextt222 nexttoward -0.9999999999999996 Infinity ->  -0.9999999999999995
    111 ddnextt223 nexttoward -0.9999999999999997 Infinity ->  -0.9999999999999996
    112 ddnextt224 nexttoward -0.9999999999999998 Infinity ->  -0.9999999999999997
    113 ddnextt225 nexttoward -0.9999999999999999 Infinity ->  -0.9999999999999998
    114 ddnextt226 nexttoward -1.000000000000000  Infinity ->  -0.9999999999999999
    115 ddnextt227 nexttoward -1.0         Infinity ->  -0.9999999999999999
    116 ddnextt228 nexttoward -1           Infinity ->  -0.9999999999999999
    117 ddnextt229 nexttoward -1.000000000000001  Infinity ->  -1.000000000000000
    118 ddnextt230 nexttoward -1.000000000000002  Infinity ->  -1.000000000000001
    119 ddnextt231 nexttoward -1.000000000000003  Infinity ->  -1.000000000000002
    120 ddnextt232 nexttoward -1.000000000000004  Infinity ->  -1.000000000000003
    121 ddnextt233 nexttoward -1.000000000000005  Infinity ->  -1.000000000000004
    122 ddnextt234 nexttoward -1.000000000000006  Infinity ->  -1.000000000000005
    123 ddnextt235 nexttoward -1.000000000000007  Infinity ->  -1.000000000000006
    124 ddnextt236 nexttoward -1.000000000000008  Infinity ->  -1.000000000000007
    125 ddnextt237 nexttoward -1.000000000000009  Infinity ->  -1.000000000000008
    126 ddnextt238 nexttoward -1.000000000000010  Infinity ->  -1.000000000000009
    127 ddnextt239 nexttoward -1.000000000000011  Infinity ->  -1.000000000000010
    128 ddnextt240 nexttoward -1.000000000000012  Infinity ->  -1.000000000000011
    129 
    130 -- Zeros
    131 ddnextt300 nexttoward  0           Infinity ->  1E-398              Underflow Subnormal Inexact Rounded
    132 ddnextt301 nexttoward  0.00        Infinity ->  1E-398              Underflow Subnormal Inexact Rounded
    133 ddnextt302 nexttoward  0E-300      Infinity ->  1E-398              Underflow Subnormal Inexact Rounded
    134 ddnextt303 nexttoward  0E+300      Infinity ->  1E-398              Underflow Subnormal Inexact Rounded
    135 ddnextt304 nexttoward  0E+30000    Infinity ->  1E-398              Underflow Subnormal Inexact Rounded
    136 ddnextt305 nexttoward -0           Infinity ->  1E-398              Underflow Subnormal Inexact Rounded
    137 ddnextt306 nexttoward -0.00        Infinity ->  1E-398              Underflow Subnormal Inexact Rounded
    138 ddnextt307 nexttoward -0E-300      Infinity ->  1E-398              Underflow Subnormal Inexact Rounded
    139 ddnextt308 nexttoward -0E+300      Infinity ->  1E-398              Underflow Subnormal Inexact Rounded
    140 ddnextt309 nexttoward -0E+30000    Infinity ->  1E-398              Underflow Subnormal Inexact Rounded
    141 
    142 -- specials
    143 ddnextt350 nexttoward   Inf    Infinity ->  Infinity
    144 ddnextt351 nexttoward  -Inf    Infinity -> -9.999999999999999E+384
    145 ddnextt352 nexttoward   NaN    Infinity ->  NaN
    146 ddnextt353 nexttoward  sNaN    Infinity ->  NaN   Invalid_operation
    147 ddnextt354 nexttoward   NaN77  Infinity ->  NaN77
    148 ddnextt355 nexttoward  sNaN88  Infinity ->  NaN88 Invalid_operation
    149 ddnextt356 nexttoward  -NaN    Infinity -> -NaN
    150 ddnextt357 nexttoward -sNaN    Infinity -> -NaN   Invalid_operation
    151 ddnextt358 nexttoward  -NaN77  Infinity -> -NaN77
    152 ddnextt359 nexttoward -sNaN88  Infinity -> -NaN88 Invalid_operation
    153 
    154 -- Nmax, Nmin, Ntiny, subnormals
    155 ddnextt370 nexttoward  -9.999999999999999E+384  Infinity  -> -9.999999999999998E+384
    156 ddnextt371 nexttoward  -9.999999999999998E+384  Infinity  -> -9.999999999999997E+384
    157 ddnextt372 nexttoward  -1E-383                  Infinity  -> -9.99999999999999E-384  Underflow Subnormal Inexact Rounded
    158 ddnextt373 nexttoward  -1.000000000000000E-383  Infinity  -> -9.99999999999999E-384  Underflow Subnormal Inexact Rounded
    159 ddnextt374 nexttoward  -9E-398                  Infinity  -> -8E-398                 Underflow Subnormal Inexact Rounded
    160 ddnextt375 nexttoward  -9.9E-397                Infinity  -> -9.8E-397               Underflow Subnormal Inexact Rounded
    161 ddnextt376 nexttoward  -9.99999999999E-387      Infinity  -> -9.99999999998E-387     Underflow Subnormal Inexact Rounded
    162 ddnextt377 nexttoward  -9.99999999999999E-384   Infinity  -> -9.99999999999998E-384  Underflow Subnormal Inexact Rounded
    163 ddnextt378 nexttoward  -9.99999999999998E-384   Infinity  -> -9.99999999999997E-384  Underflow Subnormal Inexact Rounded
    164 ddnextt379 nexttoward  -9.99999999999997E-384   Infinity  -> -9.99999999999996E-384  Underflow Subnormal Inexact Rounded
    165 ddnextt380 nexttoward  -0E-398                  Infinity  ->  1E-398                 Underflow Subnormal Inexact Rounded
    166 ddnextt381 nexttoward  -1E-398                  Infinity  -> -0E-398 Underflow Subnormal Inexact Rounded Clamped
    167 ddnextt382 nexttoward  -2E-398                  Infinity  -> -1E-398                 Underflow Subnormal Inexact Rounded
    168 
    169 ddnextt383 nexttoward   0E-398                  Infinity  ->  1E-398                 Underflow Subnormal Inexact Rounded
    170 ddnextt384 nexttoward   1E-398                  Infinity  ->  2E-398                 Underflow Subnormal Inexact Rounded
    171 ddnextt385 nexttoward   2E-398                  Infinity  ->  3E-398                 Underflow Subnormal Inexact Rounded
    172 ddnextt386 nexttoward   10E-398                 Infinity  ->  1.1E-397               Underflow Subnormal Inexact Rounded
    173 ddnextt387 nexttoward   100E-398                Infinity  ->  1.01E-396              Underflow Subnormal Inexact Rounded
    174 ddnextt388 nexttoward   100000E-398             Infinity  ->  1.00001E-393           Underflow Subnormal Inexact Rounded
    175 ddnextt389 nexttoward   1.00000000000E-383      Infinity  ->  1.000000000000001E-383
    176 ddnextt390 nexttoward   1.000000000000000E-383  Infinity  ->  1.000000000000001E-383
    177 ddnextt391 nexttoward   1E-383                  Infinity  ->  1.000000000000001E-383
    178 ddnextt392 nexttoward   9.999999999999997E+384  Infinity  ->  9.999999999999998E+384
    179 ddnextt393 nexttoward   9.999999999999998E+384  Infinity  ->  9.999999999999999E+384
    180 ddnextt394 nexttoward   9.999999999999999E+384  Infinity  ->  Infinity               Overflow Inexact Rounded
    181 
    182 ------- lhs>rhs
    183 ddnextt401 nexttoward  0.9999999999999995  -Infinity ->   0.9999999999999994
    184 ddnextt402 nexttoward  0.9999999999999996  -Infinity ->   0.9999999999999995
    185 ddnextt403 nexttoward  0.9999999999999997  -Infinity ->   0.9999999999999996
    186 ddnextt404 nexttoward  0.9999999999999998  -Infinity ->   0.9999999999999997
    187 ddnextt405 nexttoward  0.9999999999999999  -Infinity ->   0.9999999999999998
    188 ddnextt406 nexttoward  1.000000000000000   -Infinity ->   0.9999999999999999
    189 ddnextt407 nexttoward  1.0          -Infinity ->   0.9999999999999999
    190 ddnextt408 nexttoward  1            -Infinity ->   0.9999999999999999
    191 ddnextt409 nexttoward  1.000000000000001   -Infinity ->   1.000000000000000
    192 ddnextt410 nexttoward  1.000000000000002   -Infinity ->   1.000000000000001
    193 ddnextt411 nexttoward  1.000000000000003   -Infinity ->   1.000000000000002
    194 ddnextt412 nexttoward  1.000000000000004   -Infinity ->   1.000000000000003
    195 ddnextt413 nexttoward  1.000000000000005   -Infinity ->   1.000000000000004
    196 ddnextt414 nexttoward  1.000000000000006   -Infinity ->   1.000000000000005
    197 ddnextt415 nexttoward  1.000000000000007   -Infinity ->   1.000000000000006
    198 ddnextt416 nexttoward  1.000000000000008   -Infinity ->   1.000000000000007
    199 ddnextt417 nexttoward  1.000000000000009   -Infinity ->   1.000000000000008
    200 ddnextt418 nexttoward  1.000000000000010   -Infinity ->   1.000000000000009
    201 ddnextt419 nexttoward  1.000000000000011   -Infinity ->   1.000000000000010
    202 ddnextt420 nexttoward  1.000000000000012   -Infinity ->   1.000000000000011
    203 
    204 ddnextt421 nexttoward -0.9999999999999995  -Infinity ->  -0.9999999999999996
    205 ddnextt422 nexttoward -0.9999999999999996  -Infinity ->  -0.9999999999999997
    206 ddnextt423 nexttoward -0.9999999999999997  -Infinity ->  -0.9999999999999998
    207 ddnextt424 nexttoward -0.9999999999999998  -Infinity ->  -0.9999999999999999
    208 ddnextt425 nexttoward -0.9999999999999999  -Infinity ->  -1.000000000000000
    209 ddnextt426 nexttoward -1.000000000000000   -Infinity ->  -1.000000000000001
    210 ddnextt427 nexttoward -1.0          -Infinity ->  -1.000000000000001
    211 ddnextt428 nexttoward -1            -Infinity ->  -1.000000000000001
    212 ddnextt429 nexttoward -1.000000000000001   -Infinity ->  -1.000000000000002
    213 ddnextt430 nexttoward -1.000000000000002   -Infinity ->  -1.000000000000003
    214 ddnextt431 nexttoward -1.000000000000003   -Infinity ->  -1.000000000000004
    215 ddnextt432 nexttoward -1.000000000000004   -Infinity ->  -1.000000000000005
    216 ddnextt433 nexttoward -1.000000000000005   -Infinity ->  -1.000000000000006
    217 ddnextt434 nexttoward -1.000000000000006   -Infinity ->  -1.000000000000007
    218 ddnextt435 nexttoward -1.000000000000007   -Infinity ->  -1.000000000000008
    219 ddnextt436 nexttoward -1.000000000000008   -Infinity ->  -1.000000000000009
    220 ddnextt437 nexttoward -1.000000000000009   -Infinity ->  -1.000000000000010
    221 ddnextt438 nexttoward -1.000000000000010   -Infinity ->  -1.000000000000011
    222 ddnextt439 nexttoward -1.000000000000011   -Infinity ->  -1.000000000000012
    223 
    224 -- Zeros
    225 ddnextt500 nexttoward -0            -Infinity -> -1E-398         Underflow Subnormal Inexact Rounded
    226 ddnextt501 nexttoward  0            -Infinity -> -1E-398         Underflow Subnormal Inexact Rounded
    227 ddnextt502 nexttoward  0.00         -Infinity -> -1E-398         Underflow Subnormal Inexact Rounded
    228 ddnextt503 nexttoward -0.00         -Infinity -> -1E-398         Underflow Subnormal Inexact Rounded
    229 ddnextt504 nexttoward  0E-300       -Infinity -> -1E-398         Underflow Subnormal Inexact Rounded
    230 ddnextt505 nexttoward  0E+300       -Infinity -> -1E-398         Underflow Subnormal Inexact Rounded
    231 ddnextt506 nexttoward  0E+30000     -Infinity -> -1E-398         Underflow Subnormal Inexact Rounded
    232 ddnextt507 nexttoward -0E+30000     -Infinity -> -1E-398         Underflow Subnormal Inexact Rounded
    233 
    234 -- specials
    235 ddnextt550 nexttoward   Inf     -Infinity ->  9.999999999999999E+384
    236 ddnextt551 nexttoward  -Inf     -Infinity -> -Infinity
    237 ddnextt552 nexttoward   NaN     -Infinity ->  NaN
    238 ddnextt553 nexttoward  sNaN     -Infinity ->  NaN   Invalid_operation
    239 ddnextt554 nexttoward   NaN77   -Infinity ->  NaN77
    240 ddnextt555 nexttoward  sNaN88   -Infinity ->  NaN88 Invalid_operation
    241 ddnextt556 nexttoward  -NaN     -Infinity -> -NaN
    242 ddnextt557 nexttoward -sNaN     -Infinity -> -NaN   Invalid_operation
    243 ddnextt558 nexttoward  -NaN77   -Infinity -> -NaN77
    244 ddnextt559 nexttoward -sNaN88   -Infinity -> -NaN88 Invalid_operation
    245 
    246 -- Nmax, Nmin, Ntiny, subnormals
    247 ddnextt670 nexttoward  9.999999999999999E+384   -Infinity  -> 9.999999999999998E+384
    248 ddnextt671 nexttoward  9.999999999999998E+384   -Infinity  -> 9.999999999999997E+384
    249 ddnextt672 nexttoward  1E-383                   -Infinity  -> 9.99999999999999E-384   Underflow Subnormal  Inexact Rounded
    250 ddnextt673 nexttoward  1.000000000000000E-383   -Infinity  -> 9.99999999999999E-384   Underflow Subnormal  Inexact Rounded
    251 ddnextt674 nexttoward  9E-398                   -Infinity  -> 8E-398                  Underflow Subnormal  Inexact Rounded
    252 ddnextt675 nexttoward  9.9E-397                 -Infinity  -> 9.8E-397                Underflow Subnormal  Inexact Rounded
    253 ddnextt676 nexttoward  9.99999999999E-387       -Infinity  -> 9.99999999998E-387      Underflow Subnormal  Inexact Rounded
    254 ddnextt677 nexttoward  9.99999999999999E-384    -Infinity  -> 9.99999999999998E-384   Underflow Subnormal  Inexact Rounded
    255 ddnextt678 nexttoward  9.99999999999998E-384    -Infinity  -> 9.99999999999997E-384   Underflow Subnormal  Inexact Rounded
    256 ddnextt679 nexttoward  9.99999999999997E-384    -Infinity  -> 9.99999999999996E-384   Underflow Subnormal  Inexact Rounded
    257 ddnextt680 nexttoward  0E-398                   -Infinity  -> -1E-398                 Underflow Subnormal  Inexact Rounded
    258 ddnextt681 nexttoward  1E-398                   -Infinity  -> 0E-398                  Underflow Subnormal  Inexact Rounded Clamped
    259 ddnextt682 nexttoward  2E-398                   -Infinity  -> 1E-398                  Underflow Subnormal  Inexact Rounded
    260 
    261 ddnextt683 nexttoward  -0E-398                  -Infinity  -> -1E-398                 Underflow Subnormal  Inexact Rounded
    262 ddnextt684 nexttoward  -1E-398                  -Infinity  -> -2E-398                 Underflow Subnormal  Inexact Rounded
    263 ddnextt685 nexttoward  -2E-398                  -Infinity  -> -3E-398                 Underflow Subnormal  Inexact Rounded
    264 ddnextt686 nexttoward  -10E-398                 -Infinity  -> -1.1E-397               Underflow Subnormal  Inexact Rounded
    265 ddnextt687 nexttoward  -100E-398                -Infinity  -> -1.01E-396              Underflow Subnormal  Inexact Rounded
    266 ddnextt688 nexttoward  -100000E-398             -Infinity  -> -1.00001E-393           Underflow Subnormal  Inexact Rounded
    267 ddnextt689 nexttoward  -1.00000000000E-383      -Infinity  -> -1.000000000000001E-383
    268 ddnextt690 nexttoward  -1.000000000000000E-383  -Infinity  -> -1.000000000000001E-383
    269 ddnextt691 nexttoward  -1E-383                  -Infinity  -> -1.000000000000001E-383
    270 ddnextt692 nexttoward  -9.999999999999998E+384  -Infinity  -> -9.999999999999999E+384
    271 ddnextt693 nexttoward  -9.999999999999999E+384  -Infinity  -> -Infinity               Overflow Inexact Rounded
    272 
    273 ------- Specials
    274 ddnextt780 nexttoward -Inf  -Inf   -> -Infinity
    275 ddnextt781 nexttoward -Inf  -1000  -> -9.999999999999999E+384
    276 ddnextt782 nexttoward -Inf  -1     -> -9.999999999999999E+384
    277 ddnextt783 nexttoward -Inf  -0     -> -9.999999999999999E+384
    278 ddnextt784 nexttoward -Inf   0     -> -9.999999999999999E+384
    279 ddnextt785 nexttoward -Inf   1     -> -9.999999999999999E+384
    280 ddnextt786 nexttoward -Inf   1000  -> -9.999999999999999E+384
    281 ddnextt787 nexttoward -1000 -Inf   -> -1000.000000000001
    282 ddnextt788 nexttoward -Inf  -Inf   -> -Infinity
    283 ddnextt789 nexttoward -1    -Inf   -> -1.000000000000001
    284 ddnextt790 nexttoward -0    -Inf   -> -1E-398           Underflow Subnormal Inexact Rounded
    285 ddnextt791 nexttoward  0    -Inf   -> -1E-398           Underflow Subnormal Inexact Rounded
    286 ddnextt792 nexttoward  1    -Inf   ->  0.9999999999999999
    287 ddnextt793 nexttoward  1000 -Inf   ->  999.9999999999999
    288 ddnextt794 nexttoward  Inf  -Inf   ->  9.999999999999999E+384
    289 
    290 ddnextt800 nexttoward  Inf  -Inf   ->  9.999999999999999E+384
    291 ddnextt801 nexttoward  Inf  -1000  ->  9.999999999999999E+384
    292 ddnextt802 nexttoward  Inf  -1     ->  9.999999999999999E+384
    293 ddnextt803 nexttoward  Inf  -0     ->  9.999999999999999E+384
    294 ddnextt804 nexttoward  Inf   0     ->  9.999999999999999E+384
    295 ddnextt805 nexttoward  Inf   1     ->  9.999999999999999E+384
    296 ddnextt806 nexttoward  Inf   1000  ->  9.999999999999999E+384
    297 ddnextt807 nexttoward  Inf   Inf   ->  Infinity
    298 ddnextt808 nexttoward -1000  Inf   -> -999.9999999999999
    299 ddnextt809 nexttoward -Inf   Inf   -> -9.999999999999999E+384
    300 ddnextt810 nexttoward -1     Inf   -> -0.9999999999999999
    301 ddnextt811 nexttoward -0     Inf   ->  1E-398           Underflow Subnormal Inexact Rounded
    302 ddnextt812 nexttoward  0     Inf   ->  1E-398           Underflow Subnormal Inexact Rounded
    303 ddnextt813 nexttoward  1     Inf   ->  1.000000000000001
    304 ddnextt814 nexttoward  1000  Inf   ->  1000.000000000001
    305 ddnextt815 nexttoward  Inf   Inf   ->  Infinity
    306 
    307 ddnextt821 nexttoward  NaN -Inf    ->  NaN
    308 ddnextt822 nexttoward  NaN -1000   ->  NaN
    309 ddnextt823 nexttoward  NaN -1      ->  NaN
    310 ddnextt824 nexttoward  NaN -0      ->  NaN
    311 ddnextt825 nexttoward  NaN  0      ->  NaN
    312 ddnextt826 nexttoward  NaN  1      ->  NaN
    313 ddnextt827 nexttoward  NaN  1000   ->  NaN
    314 ddnextt828 nexttoward  NaN  Inf    ->  NaN
    315 ddnextt829 nexttoward  NaN  NaN    ->  NaN
    316 ddnextt830 nexttoward -Inf  NaN    ->  NaN
    317 ddnextt831 nexttoward -1000 NaN    ->  NaN
    318 ddnextt832 nexttoward -1    NaN    ->  NaN
    319 ddnextt833 nexttoward -0    NaN    ->  NaN
    320 ddnextt834 nexttoward  0    NaN    ->  NaN
    321 ddnextt835 nexttoward  1    NaN    ->  NaN
    322 ddnextt836 nexttoward  1000 NaN    ->  NaN
    323 ddnextt837 nexttoward  Inf  NaN    ->  NaN
    324 
    325 ddnextt841 nexttoward  sNaN -Inf   ->  NaN  Invalid_operation
    326 ddnextt842 nexttoward  sNaN -1000  ->  NaN  Invalid_operation
    327 ddnextt843 nexttoward  sNaN -1     ->  NaN  Invalid_operation
    328 ddnextt844 nexttoward  sNaN -0     ->  NaN  Invalid_operation
    329 ddnextt845 nexttoward  sNaN  0     ->  NaN  Invalid_operation
    330 ddnextt846 nexttoward  sNaN  1     ->  NaN  Invalid_operation
    331 ddnextt847 nexttoward  sNaN  1000  ->  NaN  Invalid_operation
    332 ddnextt848 nexttoward  sNaN  NaN   ->  NaN  Invalid_operation
    333 ddnextt849 nexttoward  sNaN sNaN   ->  NaN  Invalid_operation
    334 ddnextt850 nexttoward  NaN  sNaN   ->  NaN  Invalid_operation
    335 ddnextt851 nexttoward -Inf  sNaN   ->  NaN  Invalid_operation
    336 ddnextt852 nexttoward -1000 sNaN   ->  NaN  Invalid_operation
    337 ddnextt853 nexttoward -1    sNaN   ->  NaN  Invalid_operation
    338 ddnextt854 nexttoward -0    sNaN   ->  NaN  Invalid_operation
    339 ddnextt855 nexttoward  0    sNaN   ->  NaN  Invalid_operation
    340 ddnextt856 nexttoward  1    sNaN   ->  NaN  Invalid_operation
    341 ddnextt857 nexttoward  1000 sNaN   ->  NaN  Invalid_operation
    342 ddnextt858 nexttoward  Inf  sNaN   ->  NaN  Invalid_operation
    343 ddnextt859 nexttoward  NaN  sNaN   ->  NaN  Invalid_operation
    344 
    345 -- propagating NaNs
    346 ddnextt861 nexttoward  NaN1   -Inf    ->  NaN1
    347 ddnextt862 nexttoward +NaN2   -1000   ->  NaN2
    348 ddnextt863 nexttoward  NaN3    1000   ->  NaN3
    349 ddnextt864 nexttoward  NaN4    Inf    ->  NaN4
    350 ddnextt865 nexttoward  NaN5   +NaN6   ->  NaN5
    351 ddnextt866 nexttoward -Inf     NaN7   ->  NaN7
    352 ddnextt867 nexttoward -1000    NaN8   ->  NaN8
    353 ddnextt868 nexttoward  1000    NaN9   ->  NaN9
    354 ddnextt869 nexttoward  Inf    +NaN10  ->  NaN10
    355 ddnextt871 nexttoward  sNaN11  -Inf   ->  NaN11  Invalid_operation
    356 ddnextt872 nexttoward  sNaN12  -1000  ->  NaN12  Invalid_operation
    357 ddnextt873 nexttoward  sNaN13   1000  ->  NaN13  Invalid_operation
    358 ddnextt874 nexttoward  sNaN14   NaN17 ->  NaN14  Invalid_operation
    359 ddnextt875 nexttoward  sNaN15  sNaN18 ->  NaN15  Invalid_operation
    360 ddnextt876 nexttoward  NaN16   sNaN19 ->  NaN19  Invalid_operation
    361 ddnextt877 nexttoward -Inf    +sNaN20 ->  NaN20  Invalid_operation
    362 ddnextt878 nexttoward -1000    sNaN21 ->  NaN21  Invalid_operation
    363 ddnextt879 nexttoward  1000    sNaN22 ->  NaN22  Invalid_operation
    364 ddnextt880 nexttoward  Inf     sNaN23 ->  NaN23  Invalid_operation
    365 ddnextt881 nexttoward +NaN25  +sNaN24 ->  NaN24  Invalid_operation
    366 ddnextt882 nexttoward -NaN26    NaN28 -> -NaN26
    367 ddnextt883 nexttoward -sNaN27  sNaN29 -> -NaN27  Invalid_operation
    368 ddnextt884 nexttoward  1000    -NaN30 -> -NaN30
    369 ddnextt885 nexttoward  1000   -sNaN31 -> -NaN31  Invalid_operation
    370 
    371 -- Null tests
    372 ddnextt900 nexttoward 1  # -> NaN Invalid_operation
    373 ddnextt901 nexttoward #  1 -> NaN Invalid_operation
    374 
    375