AppPkg/Applications/Python/Python-2.7.2/Lib/test/decimaltestdata/dqSubtract.decTest

   1 ------------------------------------------------------------------------
   2 -- dqSubtract.decTest -- decQuad subtraction                          --
   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@uk.ibm.com                                                   --
  19 ------------------------------------------------------------------------
  20 version: 2.59
  21
  22 -- This set of tests are for decQuads only; all arguments are
  23 -- representable in a decQuad
  24 extended:    1
  25 clamp:       1
  26 precision:   34
  27 maxExponent: 6144
  28 minExponent: -6143
  29 rounding:    half_even
  30
  31 -- [first group are 'quick confidence check']
  32 dqsub001 subtract  0   0  -> '0'
  33 dqsub002 subtract  1   1  -> '0'
  34 dqsub003 subtract  1   2  -> '-1'
  35 dqsub004 subtract  2   1  -> '1'
  36 dqsub005 subtract  2   2  -> '0'
  37 dqsub006 subtract  3   2  -> '1'
  38 dqsub007 subtract  2   3  -> '-1'
  39
  40 dqsub011 subtract -0   0  -> '-0'
  41 dqsub012 subtract -1   1  -> '-2'
  42 dqsub013 subtract -1   2  -> '-3'
  43 dqsub014 subtract -2   1  -> '-3'
  44 dqsub015 subtract -2   2  -> '-4'
  45 dqsub016 subtract -3   2  -> '-5'
  46 dqsub017 subtract -2   3  -> '-5'
  47
  48 dqsub021 subtract  0  -0  -> '0'
  49 dqsub022 subtract  1  -1  -> '2'
  50 dqsub023 subtract  1  -2  -> '3'
  51 dqsub024 subtract  2  -1  -> '3'
  52 dqsub025 subtract  2  -2  -> '4'
  53 dqsub026 subtract  3  -2  -> '5'
  54 dqsub027 subtract  2  -3  -> '5'
  55
  56 dqsub030 subtract  11  1  -> 10
  57 dqsub031 subtract  10  1  ->  9
  58 dqsub032 subtract  9   1  ->  8
  59 dqsub033 subtract  1   1  ->  0
  60 dqsub034 subtract  0   1  -> -1
  61 dqsub035 subtract -1   1  -> -2
  62 dqsub036 subtract -9   1  -> -10
  63 dqsub037 subtract -10  1  -> -11
  64 dqsub038 subtract -11  1  -> -12
  65
  66 dqsub040 subtract '5.75' '3.3'  -> '2.45'
  67 dqsub041 subtract '5'    '-3'   -> '8'
  68 dqsub042 subtract '-5'   '-3'   -> '-2'
  69 dqsub043 subtract '-7'   '2.5'  -> '-9.5'
  70 dqsub044 subtract '0.7'  '0.3'  -> '0.4'
  71 dqsub045 subtract '1.3'  '0.3'  -> '1.0'
  72 dqsub046 subtract '1.25' '1.25' -> '0.00'
  73
  74 dqsub050 subtract '1.23456789'    '1.00000000' -> '0.23456789'
  75 dqsub051 subtract '1.23456789'    '1.00000089' -> '0.23456700'
  76
  77 dqsub060 subtract '70'    '10000e+34' -> '-1.000000000000000000000000000000000E+38' Inexact Rounded
  78 dqsub061 subtract '700'    '10000e+34' -> '-1.000000000000000000000000000000000E+38' Inexact Rounded
  79 dqsub062 subtract '7000'    '10000e+34' -> '-9.999999999999999999999999999999999E+37' Inexact Rounded
  80 dqsub063 subtract '70000'    '10000e+34' -> '-9.999999999999999999999999999999993E+37' Rounded
  81 dqsub064 subtract '700000'    '10000e+34' -> '-9.999999999999999999999999999999930E+37' Rounded
  82   -- symmetry:
  83 dqsub065 subtract '10000e+34'    '70' -> '1.000000000000000000000000000000000E+38' Inexact Rounded
  84 dqsub066 subtract '10000e+34'    '700' -> '1.000000000000000000000000000000000E+38' Inexact Rounded
  85 dqsub067 subtract '10000e+34'    '7000' -> '9.999999999999999999999999999999999E+37' Inexact Rounded
  86 dqsub068 subtract '10000e+34'    '70000' -> '9.999999999999999999999999999999993E+37' Rounded
  87 dqsub069 subtract '10000e+34'    '700000' -> '9.999999999999999999999999999999930E+37' Rounded
  88
  89   -- some of the next group are really constructor tests
  90 dqsub090 subtract '00.0'    '0.0'  -> '0.0'
  91 dqsub091 subtract '00.0'    '0.00' -> '0.00'
  92 dqsub092 subtract '0.00'    '00.0' -> '0.00'
  93 dqsub093 subtract '00.0'    '0.00' -> '0.00'
  94 dqsub094 subtract '0.00'    '00.0' -> '0.00'
  95 dqsub095 subtract '3'    '.3'   -> '2.7'
  96 dqsub096 subtract '3.'   '.3'   -> '2.7'
  97 dqsub097 subtract '3.0'  '.3'   -> '2.7'
  98 dqsub098 subtract '3.00' '.3'   -> '2.70'
  99 dqsub099 subtract '3'    '3'    -> '0'
 100 dqsub100 subtract '3'    '+3'   -> '0'
 101 dqsub101 subtract '3'    '-3'   -> '6'
 102 dqsub102 subtract '3'    '0.3'  -> '2.7'
 103 dqsub103 subtract '3.'   '0.3'  -> '2.7'
 104 dqsub104 subtract '3.0'  '0.3'  -> '2.7'
 105 dqsub105 subtract '3.00' '0.3'  -> '2.70'
 106 dqsub106 subtract '3'    '3.0'  -> '0.0'
 107 dqsub107 subtract '3'    '+3.0' -> '0.0'
 108 dqsub108 subtract '3'    '-3.0' -> '6.0'
 109
 110 -- the above all from add; massaged and extended.  Now some new ones...
 111 -- [particularly important for comparisons]
 112 -- NB: -xE-8 below were non-exponents pre-ANSI X3-274, and -1E-7 or 0E-7
 113 -- with input rounding.
 114 dqsub120 subtract  '10.23456784'    '10.23456789'  -> '-5E-8'
 115 dqsub121 subtract  '10.23456785'    '10.23456789'  -> '-4E-8'
 116 dqsub122 subtract  '10.23456786'    '10.23456789'  -> '-3E-8'
 117 dqsub123 subtract  '10.23456787'    '10.23456789'  -> '-2E-8'
 118 dqsub124 subtract  '10.23456788'    '10.23456789'  -> '-1E-8'
 119 dqsub125 subtract  '10.23456789'    '10.23456789'  -> '0E-8'
 120 dqsub126 subtract  '10.23456790'    '10.23456789'  -> '1E-8'
 121 dqsub127 subtract  '10.23456791'    '10.23456789'  -> '2E-8'
 122 dqsub128 subtract  '10.23456792'    '10.23456789'  -> '3E-8'
 123 dqsub129 subtract  '10.23456793'    '10.23456789'  -> '4E-8'
 124 dqsub130 subtract  '10.23456794'    '10.23456789'  -> '5E-8'
 125 dqsub131 subtract  '10.23456781'    '10.23456786'  -> '-5E-8'
 126 dqsub132 subtract  '10.23456782'    '10.23456786'  -> '-4E-8'
 127 dqsub133 subtract  '10.23456783'    '10.23456786'  -> '-3E-8'
 128 dqsub134 subtract  '10.23456784'    '10.23456786'  -> '-2E-8'
 129 dqsub135 subtract  '10.23456785'    '10.23456786'  -> '-1E-8'
 130 dqsub136 subtract  '10.23456786'    '10.23456786'  -> '0E-8'
 131 dqsub137 subtract  '10.23456787'    '10.23456786'  -> '1E-8'
 132 dqsub138 subtract  '10.23456788'    '10.23456786'  -> '2E-8'
 133 dqsub139 subtract  '10.23456789'    '10.23456786'  -> '3E-8'
 134 dqsub140 subtract  '10.23456790'    '10.23456786'  -> '4E-8'
 135 dqsub141 subtract  '10.23456791'    '10.23456786'  -> '5E-8'
 136 dqsub142 subtract  '1'              '0.999999999'  -> '1E-9'
 137 dqsub143 subtract  '0.999999999'    '1'            -> '-1E-9'
 138 dqsub144 subtract  '-10.23456780'   '-10.23456786' -> '6E-8'
 139 dqsub145 subtract  '-10.23456790'   '-10.23456786' -> '-4E-8'
 140 dqsub146 subtract  '-10.23456791'   '-10.23456786' -> '-5E-8'
 141
 142 -- additional scaled arithmetic tests [0.97 problem]
 143 dqsub160 subtract '0'     '.1'      -> '-0.1'
 144 dqsub161 subtract '00'    '.97983'  -> '-0.97983'
 145 dqsub162 subtract '0'     '.9'      -> '-0.9'
 146 dqsub163 subtract '0'     '0.102'   -> '-0.102'
 147 dqsub164 subtract '0'     '.4'      -> '-0.4'
 148 dqsub165 subtract '0'     '.307'    -> '-0.307'
 149 dqsub166 subtract '0'     '.43822'  -> '-0.43822'
 150 dqsub167 subtract '0'     '.911'    -> '-0.911'
 151 dqsub168 subtract '.0'    '.02'     -> '-0.02'
 152 dqsub169 subtract '00'    '.392'    -> '-0.392'
 153 dqsub170 subtract '0'     '.26'     -> '-0.26'
 154 dqsub171 subtract '0'     '0.51'    -> '-0.51'
 155 dqsub172 subtract '0'     '.2234'   -> '-0.2234'
 156 dqsub173 subtract '0'     '.2'      -> '-0.2'
 157 dqsub174 subtract '.0'    '.0008'   -> '-0.0008'
 158 -- 0. on left
 159 dqsub180 subtract '0.0'     '-.1'      -> '0.1'
 160 dqsub181 subtract '0.00'    '-.97983'  -> '0.97983'
 161 dqsub182 subtract '0.0'     '-.9'      -> '0.9'
 162 dqsub183 subtract '0.0'     '-0.102'   -> '0.102'
 163 dqsub184 subtract '0.0'     '-.4'      -> '0.4'
 164 dqsub185 subtract '0.0'     '-.307'    -> '0.307'
 165 dqsub186 subtract '0.0'     '-.43822'  -> '0.43822'
 166 dqsub187 subtract '0.0'     '-.911'    -> '0.911'
 167 dqsub188 subtract '0.0'     '-.02'     -> '0.02'
 168 dqsub189 subtract '0.00'    '-.392'    -> '0.392'
 169 dqsub190 subtract '0.0'     '-.26'     -> '0.26'
 170 dqsub191 subtract '0.0'     '-0.51'    -> '0.51'
 171 dqsub192 subtract '0.0'     '-.2234'   -> '0.2234'
 172 dqsub193 subtract '0.0'     '-.2'      -> '0.2'
 173 dqsub194 subtract '0.0'     '-.0008'   -> '0.0008'
 174 -- negatives of same
 175 dqsub200 subtract '0'     '-.1'      -> '0.1'
 176 dqsub201 subtract '00'    '-.97983'  -> '0.97983'
 177 dqsub202 subtract '0'     '-.9'      -> '0.9'
 178 dqsub203 subtract '0'     '-0.102'   -> '0.102'
 179 dqsub204 subtract '0'     '-.4'      -> '0.4'
 180 dqsub205 subtract '0'     '-.307'    -> '0.307'
 181 dqsub206 subtract '0'     '-.43822'  -> '0.43822'
 182 dqsub207 subtract '0'     '-.911'    -> '0.911'
 183 dqsub208 subtract '.0'    '-.02'     -> '0.02'
 184 dqsub209 subtract '00'    '-.392'    -> '0.392'
 185 dqsub210 subtract '0'     '-.26'     -> '0.26'
 186 dqsub211 subtract '0'     '-0.51'    -> '0.51'
 187 dqsub212 subtract '0'     '-.2234'   -> '0.2234'
 188 dqsub213 subtract '0'     '-.2'      -> '0.2'
 189 dqsub214 subtract '.0'    '-.0008'   -> '0.0008'
 190
 191 -- more fixed, LHS swaps [really the same as testcases under add]
 192 dqsub220 subtract '-56267E-12' 0  -> '-5.6267E-8'
 193 dqsub221 subtract '-56267E-11' 0  -> '-5.6267E-7'
 194 dqsub222 subtract '-56267E-10' 0  -> '-0.0000056267'
 195 dqsub223 subtract '-56267E-9'  0  -> '-0.000056267'
 196 dqsub224 subtract '-56267E-8'  0  -> '-0.00056267'
 197 dqsub225 subtract '-56267E-7'  0  -> '-0.0056267'
 198 dqsub226 subtract '-56267E-6'  0  -> '-0.056267'
 199 dqsub227 subtract '-56267E-5'  0  -> '-0.56267'
 200 dqsub228 subtract '-56267E-2'  0  -> '-562.67'
 201 dqsub229 subtract '-56267E-1'  0  -> '-5626.7'
 202 dqsub230 subtract '-56267E-0'  0  -> '-56267'
 203 -- symmetry ...
 204 dqsub240 subtract 0 '-56267E-12'  -> '5.6267E-8'
 205 dqsub241 subtract 0 '-56267E-11'  -> '5.6267E-7'
 206 dqsub242 subtract 0 '-56267E-10'  -> '0.0000056267'
 207 dqsub243 subtract 0 '-56267E-9'   -> '0.000056267'
 208 dqsub244 subtract 0 '-56267E-8'   -> '0.00056267'
 209 dqsub245 subtract 0 '-56267E-7'   -> '0.0056267'
 210 dqsub246 subtract 0 '-56267E-6'   -> '0.056267'
 211 dqsub247 subtract 0 '-56267E-5'   -> '0.56267'
 212 dqsub248 subtract 0 '-56267E-2'   -> '562.67'
 213 dqsub249 subtract 0 '-56267E-1'   -> '5626.7'
 214 dqsub250 subtract 0 '-56267E-0'   -> '56267'
 215
 216 -- now some more from the 'new' add
 217 dqsub301 subtract '1.23456789'  '1.00000000' -> '0.23456789'
 218 dqsub302 subtract '1.23456789'  '1.00000011' -> '0.23456778'
 219
 220 -- some carrying effects
 221 dqsub321 subtract '0.9998'  '0.0000' -> '0.9998'
 222 dqsub322 subtract '0.9998'  '0.0001' -> '0.9997'
 223 dqsub323 subtract '0.9998'  '0.0002' -> '0.9996'
 224 dqsub324 subtract '0.9998'  '0.0003' -> '0.9995'
 225 dqsub325 subtract '0.9998'  '-0.0000' -> '0.9998'
 226 dqsub326 subtract '0.9998'  '-0.0001' -> '0.9999'
 227 dqsub327 subtract '0.9998'  '-0.0002' -> '1.0000'
 228 dqsub328 subtract '0.9998'  '-0.0003' -> '1.0001'
 229
 230 -- internal boundaries
 231 dqsub346 subtract '10000e+9'  '7'   -> '9999999999993'
 232 dqsub347 subtract '10000e+9'  '70'   -> '9999999999930'
 233 dqsub348 subtract '10000e+9'  '700'   -> '9999999999300'
 234 dqsub349 subtract '10000e+9'  '7000'   -> '9999999993000'
 235 dqsub350 subtract '10000e+9'  '70000'   -> '9999999930000'
 236 dqsub351 subtract '10000e+9'  '700000'   -> '9999999300000'
 237 dqsub352 subtract '7' '10000e+9'   -> '-9999999999993'
 238 dqsub353 subtract '70' '10000e+9'   -> '-9999999999930'
 239 dqsub354 subtract '700' '10000e+9'   -> '-9999999999300'
 240 dqsub355 subtract '7000' '10000e+9'   -> '-9999999993000'
 241 dqsub356 subtract '70000' '10000e+9'   -> '-9999999930000'
 242 dqsub357 subtract '700000' '10000e+9'   -> '-9999999300000'
 243
 244 -- zero preservation
 245 dqsub361 subtract 1 '0.0001' -> '0.9999'
 246 dqsub362 subtract 1 '0.00001' -> '0.99999'
 247 dqsub363 subtract 1 '0.000001' -> '0.999999'
 248 dqsub364 subtract 1 '0.0000000000000000000000000000000001' -> '0.9999999999999999999999999999999999'
 249 dqsub365 subtract 1 '0.00000000000000000000000000000000001' -> '1.000000000000000000000000000000000' Inexact Rounded
 250 dqsub366 subtract 1 '0.000000000000000000000000000000000001' -> '1.000000000000000000000000000000000' Inexact Rounded
 251
 252 -- some funny zeros [in case of bad signum]
 253 dqsub370 subtract 1  0  -> 1
 254 dqsub371 subtract 1 0.  -> 1
 255 dqsub372 subtract 1  .0 -> 1.0
 256 dqsub373 subtract 1 0.0 -> 1.0
 257 dqsub374 subtract  0  1 -> -1
 258 dqsub375 subtract 0.  1 -> -1
 259 dqsub376 subtract  .0 1 -> -1.0
 260 dqsub377 subtract 0.0 1 -> -1.0
 261
 262 -- leading 0 digit before round
 263 dqsub910 subtract -103519362 -51897955.3 -> -51621406.7
 264 dqsub911 subtract 159579.444 89827.5229 -> 69751.9211
 265
 266 dqsub920 subtract 333.0000000000000000000000000123456 33.00000000000000000000000001234566 -> 299.9999999999999999999999999999999 Inexact Rounded
 267 dqsub921 subtract 333.0000000000000000000000000123456 33.00000000000000000000000001234565 -> 300.0000000000000000000000000000000 Inexact Rounded
 268 dqsub922 subtract 133.0000000000000000000000000123456 33.00000000000000000000000001234565 ->  99.99999999999999999999999999999995
 269 dqsub923 subtract 133.0000000000000000000000000123456 33.00000000000000000000000001234564 ->  99.99999999999999999999999999999996
 270 dqsub924 subtract 133.0000000000000000000000000123456 33.00000000000000000000000001234540 -> 100.0000000000000000000000000000002 Rounded
 271 dqsub925 subtract 133.0000000000000000000000000123456 43.00000000000000000000000001234560 ->  90.00000000000000000000000000000000
 272 dqsub926 subtract 133.0000000000000000000000000123456 43.00000000000000000000000001234561 ->  89.99999999999999999999999999999999
 273 dqsub927 subtract 133.0000000000000000000000000123456 43.00000000000000000000000001234566 ->  89.99999999999999999999999999999994
 274 dqsub928 subtract 101.0000000000000000000000000123456 91.00000000000000000000000001234566 ->   9.99999999999999999999999999999994
 275 dqsub929 subtract 101.0000000000000000000000000123456 99.00000000000000000000000001234566 ->   1.99999999999999999999999999999994
 276
 277 -- more LHS swaps [were fixed]
 278 dqsub390 subtract '-56267E-10'   0 ->  '-0.0000056267'
 279 dqsub391 subtract '-56267E-6'    0 ->  '-0.056267'
 280 dqsub392 subtract '-56267E-5'    0 ->  '-0.56267'
 281 dqsub393 subtract '-56267E-4'    0 ->  '-5.6267'
 282 dqsub394 subtract '-56267E-3'    0 ->  '-56.267'
 283 dqsub395 subtract '-56267E-2'    0 ->  '-562.67'
 284 dqsub396 subtract '-56267E-1'    0 ->  '-5626.7'
 285 dqsub397 subtract '-56267E-0'    0 ->  '-56267'
 286 dqsub398 subtract '-5E-10'       0 ->  '-5E-10'
 287 dqsub399 subtract '-5E-7'        0 ->  '-5E-7'
 288 dqsub400 subtract '-5E-6'        0 ->  '-0.000005'
 289 dqsub401 subtract '-5E-5'        0 ->  '-0.00005'
 290 dqsub402 subtract '-5E-4'        0 ->  '-0.0005'
 291 dqsub403 subtract '-5E-1'        0 ->  '-0.5'
 292 dqsub404 subtract '-5E0'         0 ->  '-5'
 293 dqsub405 subtract '-5E1'         0 ->  '-50'
 294 dqsub406 subtract '-5E5'         0 ->  '-500000'
 295 dqsub407 subtract '-5E33'        0 ->  '-5000000000000000000000000000000000'
 296 dqsub408 subtract '-5E34'        0 ->  '-5.000000000000000000000000000000000E+34'  Rounded
 297 dqsub409 subtract '-5E35'        0 ->  '-5.000000000000000000000000000000000E+35'  Rounded
 298 dqsub410 subtract '-5E36'        0 ->  '-5.000000000000000000000000000000000E+36'  Rounded
 299 dqsub411 subtract '-5E100'       0 ->  '-5.000000000000000000000000000000000E+100' Rounded
 300
 301 -- more RHS swaps [were fixed]
 302 dqsub420 subtract 0  '-56267E-10' ->  '0.0000056267'
 303 dqsub421 subtract 0  '-56267E-6'  ->  '0.056267'
 304 dqsub422 subtract 0  '-56267E-5'  ->  '0.56267'
 305 dqsub423 subtract 0  '-56267E-4'  ->  '5.6267'
 306 dqsub424 subtract 0  '-56267E-3'  ->  '56.267'
 307 dqsub425 subtract 0  '-56267E-2'  ->  '562.67'
 308 dqsub426 subtract 0  '-56267E-1'  ->  '5626.7'
 309 dqsub427 subtract 0  '-56267E-0'  ->  '56267'
 310 dqsub428 subtract 0  '-5E-10'     ->  '5E-10'
 311 dqsub429 subtract 0  '-5E-7'      ->  '5E-7'
 312 dqsub430 subtract 0  '-5E-6'      ->  '0.000005'
 313 dqsub431 subtract 0  '-5E-5'      ->  '0.00005'
 314 dqsub432 subtract 0  '-5E-4'      ->  '0.0005'
 315 dqsub433 subtract 0  '-5E-1'      ->  '0.5'
 316 dqsub434 subtract 0  '-5E0'       ->  '5'
 317 dqsub435 subtract 0  '-5E1'       ->  '50'
 318 dqsub436 subtract 0  '-5E5'       ->  '500000'
 319 dqsub437 subtract 0  '-5E33'      ->  '5000000000000000000000000000000000'
 320 dqsub438 subtract 0  '-5E34'      ->  '5.000000000000000000000000000000000E+34'   Rounded
 321 dqsub439 subtract 0  '-5E35'      ->  '5.000000000000000000000000000000000E+35'   Rounded
 322 dqsub440 subtract 0  '-5E36'      ->  '5.000000000000000000000000000000000E+36'   Rounded
 323 dqsub441 subtract 0  '-5E100'     ->  '5.000000000000000000000000000000000E+100'  Rounded
 324
 325
 326 -- try borderline precision, with carries, etc.
 327 dqsub461 subtract '1E+16' '1'        -> '9999999999999999'
 328 dqsub462 subtract '1E+12' '-1.111'   -> '1000000000001.111'
 329 dqsub463 subtract '1.111'  '-1E+12'  -> '1000000000001.111'
 330 dqsub464 subtract '-1'    '-1E+16'   -> '9999999999999999'
 331 dqsub465 subtract '7E+15' '1'        -> '6999999999999999'
 332 dqsub466 subtract '7E+12' '-1.111'   -> '7000000000001.111'
 333 dqsub467 subtract '1.111'  '-7E+12'  -> '7000000000001.111'
 334 dqsub468 subtract '-1'    '-7E+15'   -> '6999999999999999'
 335
 336 --                   1234567890123456       1234567890123456      1 23456789012345
 337 dqsub470 subtract '0.4444444444444444444444444444444444'  '-0.5555555555555555555555555555555563' -> '1.000000000000000000000000000000001' Inexact Rounded
 338 dqsub471 subtract '0.4444444444444444444444444444444444'  '-0.5555555555555555555555555555555562' -> '1.000000000000000000000000000000001' Inexact Rounded
 339 dqsub472 subtract '0.4444444444444444444444444444444444'  '-0.5555555555555555555555555555555561' -> '1.000000000000000000000000000000000' Inexact Rounded
 340 dqsub473 subtract '0.4444444444444444444444444444444444'  '-0.5555555555555555555555555555555560' -> '1.000000000000000000000000000000000' Inexact Rounded
 341 dqsub474 subtract '0.4444444444444444444444444444444444'  '-0.5555555555555555555555555555555559' -> '1.000000000000000000000000000000000' Inexact Rounded
 342 dqsub475 subtract '0.4444444444444444444444444444444444'  '-0.5555555555555555555555555555555558' -> '1.000000000000000000000000000000000' Inexact Rounded
 343 dqsub476 subtract '0.4444444444444444444444444444444444'  '-0.5555555555555555555555555555555557' -> '1.000000000000000000000000000000000' Inexact Rounded
 344 dqsub477 subtract '0.4444444444444444444444444444444444'  '-0.5555555555555555555555555555555556' -> '1.000000000000000000000000000000000' Rounded
 345 dqsub478 subtract '0.4444444444444444444444444444444444'  '-0.5555555555555555555555555555555555' -> '0.9999999999999999999999999999999999'
 346 dqsub479 subtract '0.4444444444444444444444444444444444'  '-0.5555555555555555555555555555555554' -> '0.9999999999999999999999999999999998'
 347 dqsub480 subtract '0.4444444444444444444444444444444444'  '-0.5555555555555555555555555555555553' -> '0.9999999999999999999999999999999997'
 348 dqsub481 subtract '0.4444444444444444444444444444444444'  '-0.5555555555555555555555555555555552' -> '0.9999999999999999999999999999999996'
 349 dqsub482 subtract '0.4444444444444444444444444444444444'  '-0.5555555555555555555555555555555551' -> '0.9999999999999999999999999999999995'
 350 dqsub483 subtract '0.4444444444444444444444444444444444'  '-0.5555555555555555555555555555555550' -> '0.9999999999999999999999999999999994'
 351
 352 -- and some more, including residue effects and different roundings
 353 rounding: half_up
 354 dqsub500 subtract '1231234555555555555555555567456789' 0             -> '1231234555555555555555555567456789'
 355 dqsub501 subtract '1231234555555555555555555567456789' 0.000000001   -> '1231234555555555555555555567456789' Inexact Rounded
 356 dqsub502 subtract '1231234555555555555555555567456789' 0.000001      -> '1231234555555555555555555567456789' Inexact Rounded
 357 dqsub503 subtract '1231234555555555555555555567456789' 0.1           -> '1231234555555555555555555567456789' Inexact Rounded
 358 dqsub504 subtract '1231234555555555555555555567456789' 0.4           -> '1231234555555555555555555567456789' Inexact Rounded
 359 dqsub505 subtract '1231234555555555555555555567456789' 0.49          -> '1231234555555555555555555567456789' Inexact Rounded
 360 dqsub506 subtract '1231234555555555555555555567456789' 0.499999      -> '1231234555555555555555555567456789' Inexact Rounded
 361 dqsub507 subtract '1231234555555555555555555567456789' 0.499999999   -> '1231234555555555555555555567456789' Inexact Rounded
 362 dqsub508 subtract '1231234555555555555555555567456789' 0.5           -> '1231234555555555555555555567456789' Inexact Rounded
 363 dqsub509 subtract '1231234555555555555555555567456789' 0.500000001   -> '1231234555555555555555555567456788' Inexact Rounded
 364 dqsub510 subtract '1231234555555555555555555567456789' 0.500001      -> '1231234555555555555555555567456788' Inexact Rounded
 365 dqsub511 subtract '1231234555555555555555555567456789' 0.51          -> '1231234555555555555555555567456788' Inexact Rounded
 366 dqsub512 subtract '1231234555555555555555555567456789' 0.6           -> '1231234555555555555555555567456788' Inexact Rounded
 367 dqsub513 subtract '1231234555555555555555555567456789' 0.9           -> '1231234555555555555555555567456788' Inexact Rounded
 368 dqsub514 subtract '1231234555555555555555555567456789' 0.99999       -> '1231234555555555555555555567456788' Inexact Rounded
 369 dqsub515 subtract '1231234555555555555555555567456789' 0.999999999   -> '1231234555555555555555555567456788' Inexact Rounded
 370 dqsub516 subtract '1231234555555555555555555567456789' 1             -> '1231234555555555555555555567456788'
 371 dqsub517 subtract '1231234555555555555555555567456789' 1.000000001   -> '1231234555555555555555555567456788' Inexact Rounded
 372 dqsub518 subtract '1231234555555555555555555567456789' 1.00001       -> '1231234555555555555555555567456788' Inexact Rounded
 373 dqsub519 subtract '1231234555555555555555555567456789' 1.1           -> '1231234555555555555555555567456788' Inexact Rounded
 374
 375 rounding: half_even
 376 dqsub520 subtract '1231234555555555555555555567456789' 0             -> '1231234555555555555555555567456789'
 377 dqsub521 subtract '1231234555555555555555555567456789' 0.000000001   -> '1231234555555555555555555567456789' Inexact Rounded
 378 dqsub522 subtract '1231234555555555555555555567456789' 0.000001      -> '1231234555555555555555555567456789' Inexact Rounded
 379 dqsub523 subtract '1231234555555555555555555567456789' 0.1           -> '1231234555555555555555555567456789' Inexact Rounded
 380 dqsub524 subtract '1231234555555555555555555567456789' 0.4           -> '1231234555555555555555555567456789' Inexact Rounded
 381 dqsub525 subtract '1231234555555555555555555567456789' 0.49          -> '1231234555555555555555555567456789' Inexact Rounded
 382 dqsub526 subtract '1231234555555555555555555567456789' 0.499999      -> '1231234555555555555555555567456789' Inexact Rounded
 383 dqsub527 subtract '1231234555555555555555555567456789' 0.499999999   -> '1231234555555555555555555567456789' Inexact Rounded
 384 dqsub528 subtract '1231234555555555555555555567456789' 0.5           -> '1231234555555555555555555567456788' Inexact Rounded
 385 dqsub529 subtract '1231234555555555555555555567456789' 0.500000001   -> '1231234555555555555555555567456788' Inexact Rounded
 386 dqsub530 subtract '1231234555555555555555555567456789' 0.500001      -> '1231234555555555555555555567456788' Inexact Rounded
 387 dqsub531 subtract '1231234555555555555555555567456789' 0.51          -> '1231234555555555555555555567456788' Inexact Rounded
 388 dqsub532 subtract '1231234555555555555555555567456789' 0.6           -> '1231234555555555555555555567456788' Inexact Rounded
 389 dqsub533 subtract '1231234555555555555555555567456789' 0.9           -> '1231234555555555555555555567456788' Inexact Rounded
 390 dqsub534 subtract '1231234555555555555555555567456789' 0.99999       -> '1231234555555555555555555567456788' Inexact Rounded
 391 dqsub535 subtract '1231234555555555555555555567456789' 0.999999999   -> '1231234555555555555555555567456788' Inexact Rounded
 392 dqsub536 subtract '1231234555555555555555555567456789' 1             -> '1231234555555555555555555567456788'
 393 dqsub537 subtract '1231234555555555555555555567456789' 1.00000001    -> '1231234555555555555555555567456788' Inexact Rounded
 394 dqsub538 subtract '1231234555555555555555555567456789' 1.00001       -> '1231234555555555555555555567456788' Inexact Rounded
 395 dqsub539 subtract '1231234555555555555555555567456789' 1.1           -> '1231234555555555555555555567456788' Inexact Rounded
 396 -- critical few with even bottom digit...
 397 dqsub540 subtract '1231234555555555555555555567456788' 0.499999999   -> '1231234555555555555555555567456788' Inexact Rounded
 398 dqsub541 subtract '1231234555555555555555555567456788' 0.5           -> '1231234555555555555555555567456788' Inexact Rounded
 399 dqsub542 subtract '1231234555555555555555555567456788' 0.500000001   -> '1231234555555555555555555567456787' Inexact Rounded
 400
 401 rounding: down
 402 dqsub550 subtract '1231234555555555555555555567456789' 0             -> '1231234555555555555555555567456789'
 403 dqsub551 subtract '1231234555555555555555555567456789' 0.000000001   -> '1231234555555555555555555567456788' Inexact Rounded
 404 dqsub552 subtract '1231234555555555555555555567456789' 0.000001      -> '1231234555555555555555555567456788' Inexact Rounded
 405 dqsub553 subtract '1231234555555555555555555567456789' 0.1           -> '1231234555555555555555555567456788' Inexact Rounded
 406 dqsub554 subtract '1231234555555555555555555567456789' 0.4           -> '1231234555555555555555555567456788' Inexact Rounded
 407 dqsub555 subtract '1231234555555555555555555567456789' 0.49          -> '1231234555555555555555555567456788' Inexact Rounded
 408 dqsub556 subtract '1231234555555555555555555567456789' 0.499999      -> '1231234555555555555555555567456788' Inexact Rounded
 409 dqsub557 subtract '1231234555555555555555555567456789' 0.499999999   -> '1231234555555555555555555567456788' Inexact Rounded
 410 dqsub558 subtract '1231234555555555555555555567456789' 0.5           -> '1231234555555555555555555567456788' Inexact Rounded
 411 dqsub559 subtract '1231234555555555555555555567456789' 0.500000001   -> '1231234555555555555555555567456788' Inexact Rounded
 412 dqsub560 subtract '1231234555555555555555555567456789' 0.500001      -> '1231234555555555555555555567456788' Inexact Rounded
 413 dqsub561 subtract '1231234555555555555555555567456789' 0.51          -> '1231234555555555555555555567456788' Inexact Rounded
 414 dqsub562 subtract '1231234555555555555555555567456789' 0.6           -> '1231234555555555555555555567456788' Inexact Rounded
 415 dqsub563 subtract '1231234555555555555555555567456789' 0.9           -> '1231234555555555555555555567456788' Inexact Rounded
 416 dqsub564 subtract '1231234555555555555555555567456789' 0.99999       -> '1231234555555555555555555567456788' Inexact Rounded
 417 dqsub565 subtract '1231234555555555555555555567456789' 0.999999999   -> '1231234555555555555555555567456788' Inexact Rounded
 418 dqsub566 subtract '1231234555555555555555555567456789' 1             -> '1231234555555555555555555567456788'
 419 dqsub567 subtract '1231234555555555555555555567456789' 1.00000001    -> '1231234555555555555555555567456787' Inexact Rounded
 420 dqsub568 subtract '1231234555555555555555555567456789' 1.00001       -> '1231234555555555555555555567456787' Inexact Rounded
 421 dqsub569 subtract '1231234555555555555555555567456789' 1.1           -> '1231234555555555555555555567456787' Inexact Rounded
 422
 423 -- symmetry...
 424 rounding: half_up
 425 dqsub600 subtract 0             '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789'
 426 dqsub601 subtract 0.000000001   '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789' Inexact Rounded
 427 dqsub602 subtract 0.000001      '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789' Inexact Rounded
 428 dqsub603 subtract 0.1           '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789' Inexact Rounded
 429 dqsub604 subtract 0.4           '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789' Inexact Rounded
 430 dqsub605 subtract 0.49          '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789' Inexact Rounded
 431 dqsub606 subtract 0.499999      '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789' Inexact Rounded
 432 dqsub607 subtract 0.499999999   '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789' Inexact Rounded
 433 dqsub608 subtract 0.5           '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789' Inexact Rounded
 434 dqsub609 subtract 0.500000001   '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
 435 dqsub610 subtract 0.500001      '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
 436 dqsub611 subtract 0.51          '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
 437 dqsub612 subtract 0.6           '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
 438 dqsub613 subtract 0.9           '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
 439 dqsub614 subtract 0.99999       '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
 440 dqsub615 subtract 0.999999999   '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
 441 dqsub616 subtract 1             '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788'
 442 dqsub617 subtract 1.000000001   '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
 443 dqsub618 subtract 1.00001       '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
 444 dqsub619 subtract 1.1           '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
 445
 446 rounding: half_even
 447 dqsub620 subtract 0             '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789'
 448 dqsub621 subtract 0.000000001   '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789' Inexact Rounded
 449 dqsub622 subtract 0.000001      '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789' Inexact Rounded
 450 dqsub623 subtract 0.1           '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789' Inexact Rounded
 451 dqsub624 subtract 0.4           '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789' Inexact Rounded
 452 dqsub625 subtract 0.49          '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789' Inexact Rounded
 453 dqsub626 subtract 0.499999      '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789' Inexact Rounded
 454 dqsub627 subtract 0.499999999   '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789' Inexact Rounded
 455 dqsub628 subtract 0.5           '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
 456 dqsub629 subtract 0.500000001   '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
 457 dqsub630 subtract 0.500001      '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
 458 dqsub631 subtract 0.51          '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
 459 dqsub632 subtract 0.6           '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
 460 dqsub633 subtract 0.9           '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
 461 dqsub634 subtract 0.99999       '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
 462 dqsub635 subtract 0.999999999   '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
 463 dqsub636 subtract 1             '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788'
 464 dqsub637 subtract 1.00000001    '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
 465 dqsub638 subtract 1.00001       '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
 466 dqsub639 subtract 1.1           '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
 467 -- critical few with even bottom digit...
 468 dqsub640 subtract 0.499999999   '1231234555555555555555555567456788' -> '-1231234555555555555555555567456788' Inexact Rounded
 469 dqsub641 subtract 0.5           '1231234555555555555555555567456788' -> '-1231234555555555555555555567456788' Inexact Rounded
 470 dqsub642 subtract 0.500000001   '1231234555555555555555555567456788' -> '-1231234555555555555555555567456787' Inexact Rounded
 471
 472 rounding: down
 473 dqsub650 subtract 0             '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789'
 474 dqsub651 subtract 0.000000001   '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
 475 dqsub652 subtract 0.000001      '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
 476 dqsub653 subtract 0.1           '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
 477 dqsub654 subtract 0.4           '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
 478 dqsub655 subtract 0.49          '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
 479 dqsub656 subtract 0.499999      '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
 480 dqsub657 subtract 0.499999999   '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
 481 dqsub658 subtract 0.5           '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
 482 dqsub659 subtract 0.500000001   '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
 483 dqsub660 subtract 0.500001      '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
 484 dqsub661 subtract 0.51          '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
 485 dqsub662 subtract 0.6           '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
 486 dqsub663 subtract 0.9           '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
 487 dqsub664 subtract 0.99999       '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
 488 dqsub665 subtract 0.999999999   '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded
 489 dqsub666 subtract 1             '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788'
 490 dqsub667 subtract 1.00000001    '1231234555555555555555555567456789' -> '-1231234555555555555555555567456787' Inexact Rounded
 491 dqsub668 subtract 1.00001       '1231234555555555555555555567456789' -> '-1231234555555555555555555567456787' Inexact Rounded
 492 dqsub669 subtract 1.1           '1231234555555555555555555567456789' -> '-1231234555555555555555555567456787' Inexact Rounded
 493
 494
 495 -- lots of leading zeros in intermediate result, and showing effects of
 496 -- input rounding would have affected the following
 497 rounding: half_up
 498 dqsub670 subtract '1234567456789' '1234567456788.1' -> 0.9
 499 dqsub671 subtract '1234567456789' '1234567456788.9' -> 0.1
 500 dqsub672 subtract '1234567456789' '1234567456789.1' -> -0.1
 501 dqsub673 subtract '1234567456789' '1234567456789.5' -> -0.5
 502 dqsub674 subtract '1234567456789' '1234567456789.9' -> -0.9
 503
 504 rounding: half_even
 505 dqsub680 subtract '1234567456789' '1234567456788.1' -> 0.9
 506 dqsub681 subtract '1234567456789' '1234567456788.9' -> 0.1
 507 dqsub682 subtract '1234567456789' '1234567456789.1' -> -0.1
 508 dqsub683 subtract '1234567456789' '1234567456789.5' -> -0.5
 509 dqsub684 subtract '1234567456789' '1234567456789.9' -> -0.9
 510
 511 dqsub685 subtract '1234567456788' '1234567456787.1' -> 0.9
 512 dqsub686 subtract '1234567456788' '1234567456787.9' -> 0.1
 513 dqsub687 subtract '1234567456788' '1234567456788.1' -> -0.1
 514 dqsub688 subtract '1234567456788' '1234567456788.5' -> -0.5
 515 dqsub689 subtract '1234567456788' '1234567456788.9' -> -0.9
 516
 517 rounding: down
 518 dqsub690 subtract '1234567456789' '1234567456788.1' -> 0.9
 519 dqsub691 subtract '1234567456789' '1234567456788.9' -> 0.1
 520 dqsub692 subtract '1234567456789' '1234567456789.1' -> -0.1
 521 dqsub693 subtract '1234567456789' '1234567456789.5' -> -0.5
 522 dqsub694 subtract '1234567456789' '1234567456789.9' -> -0.9
 523
 524 -- Specials
 525 dqsub780 subtract -Inf   Inf   -> -Infinity
 526 dqsub781 subtract -Inf   1000  -> -Infinity
 527 dqsub782 subtract -Inf   1     -> -Infinity
 528 dqsub783 subtract -Inf  -0     -> -Infinity
 529 dqsub784 subtract -Inf  -1     -> -Infinity
 530 dqsub785 subtract -Inf  -1000  -> -Infinity
 531 dqsub787 subtract -1000  Inf   -> -Infinity
 532 dqsub788 subtract -Inf   Inf   -> -Infinity
 533 dqsub789 subtract -1     Inf   -> -Infinity
 534 dqsub790 subtract  0     Inf   -> -Infinity
 535 dqsub791 subtract  1     Inf   -> -Infinity
 536 dqsub792 subtract  1000  Inf   -> -Infinity
 537
 538 dqsub800 subtract  Inf   Inf   ->  NaN  Invalid_operation
 539 dqsub801 subtract  Inf   1000  ->  Infinity
 540 dqsub802 subtract  Inf   1     ->  Infinity
 541 dqsub803 subtract  Inf   0     ->  Infinity
 542 dqsub804 subtract  Inf  -0     ->  Infinity
 543 dqsub805 subtract  Inf  -1     ->  Infinity
 544 dqsub806 subtract  Inf  -1000  ->  Infinity
 545 dqsub807 subtract  Inf  -Inf   ->  Infinity
 546 dqsub808 subtract -1000 -Inf   ->  Infinity
 547 dqsub809 subtract -Inf  -Inf   ->  NaN  Invalid_operation
 548 dqsub810 subtract -1    -Inf   ->  Infinity
 549 dqsub811 subtract -0    -Inf   ->  Infinity
 550 dqsub812 subtract  0    -Inf   ->  Infinity
 551 dqsub813 subtract  1    -Inf   ->  Infinity
 552 dqsub814 subtract  1000 -Inf   ->  Infinity
 553 dqsub815 subtract  Inf  -Inf   ->  Infinity
 554
 555 dqsub821 subtract  NaN   Inf   ->  NaN
 556 dqsub822 subtract -NaN   1000  -> -NaN
 557 dqsub823 subtract  NaN   1     ->  NaN
 558 dqsub824 subtract  NaN   0     ->  NaN
 559 dqsub825 subtract  NaN  -0     ->  NaN
 560 dqsub826 subtract  NaN  -1     ->  NaN
 561 dqsub827 subtract  NaN  -1000  ->  NaN
 562 dqsub828 subtract  NaN  -Inf   ->  NaN
 563 dqsub829 subtract -NaN   NaN   -> -NaN
 564 dqsub830 subtract -Inf   NaN   ->  NaN
 565 dqsub831 subtract -1000  NaN   ->  NaN
 566 dqsub832 subtract -1     NaN   ->  NaN
 567 dqsub833 subtract -0     NaN   ->  NaN
 568 dqsub834 subtract  0     NaN   ->  NaN
 569 dqsub835 subtract  1     NaN   ->  NaN
 570 dqsub836 subtract  1000 -NaN   -> -NaN
 571 dqsub837 subtract  Inf   NaN   ->  NaN
 572
 573 dqsub841 subtract  sNaN  Inf   ->  NaN  Invalid_operation
 574 dqsub842 subtract -sNaN  1000  -> -NaN  Invalid_operation
 575 dqsub843 subtract  sNaN  1     ->  NaN  Invalid_operation
 576 dqsub844 subtract  sNaN  0     ->  NaN  Invalid_operation
 577 dqsub845 subtract  sNaN -0     ->  NaN  Invalid_operation
 578 dqsub846 subtract  sNaN -1     ->  NaN  Invalid_operation
 579 dqsub847 subtract  sNaN -1000  ->  NaN  Invalid_operation
 580 dqsub848 subtract  sNaN  NaN   ->  NaN  Invalid_operation
 581 dqsub849 subtract  sNaN sNaN   ->  NaN  Invalid_operation
 582 dqsub850 subtract  NaN  sNaN   ->  NaN  Invalid_operation
 583 dqsub851 subtract -Inf -sNaN   -> -NaN  Invalid_operation
 584 dqsub852 subtract -1000 sNaN   ->  NaN  Invalid_operation
 585 dqsub853 subtract -1    sNaN   ->  NaN  Invalid_operation
 586 dqsub854 subtract -0    sNaN   ->  NaN  Invalid_operation
 587 dqsub855 subtract  0    sNaN   ->  NaN  Invalid_operation
 588 dqsub856 subtract  1    sNaN   ->  NaN  Invalid_operation
 589 dqsub857 subtract  1000 sNaN   ->  NaN  Invalid_operation
 590 dqsub858 subtract  Inf  sNaN   ->  NaN  Invalid_operation
 591 dqsub859 subtract  NaN  sNaN   ->  NaN  Invalid_operation
 592
 593 -- propagating NaNs
 594 dqsub861 subtract  NaN01   -Inf     ->  NaN1
 595 dqsub862 subtract -NaN02   -1000    -> -NaN2
 596 dqsub863 subtract  NaN03    1000    ->  NaN3
 597 dqsub864 subtract  NaN04    Inf     ->  NaN4
 598 dqsub865 subtract  NaN05    NaN61   ->  NaN5
 599 dqsub866 subtract -Inf     -NaN71   -> -NaN71
 600 dqsub867 subtract -1000     NaN81   ->  NaN81
 601 dqsub868 subtract  1000     NaN91   ->  NaN91
 602 dqsub869 subtract  Inf      NaN101  ->  NaN101
 603 dqsub871 subtract  sNaN011  -Inf    ->  NaN11  Invalid_operation
 604 dqsub872 subtract  sNaN012  -1000   ->  NaN12  Invalid_operation
 605 dqsub873 subtract -sNaN013   1000   -> -NaN13  Invalid_operation
 606 dqsub874 subtract  sNaN014   NaN171 ->  NaN14  Invalid_operation
 607 dqsub875 subtract  sNaN015  sNaN181 ->  NaN15  Invalid_operation
 608 dqsub876 subtract  NaN016   sNaN191 ->  NaN191 Invalid_operation
 609 dqsub877 subtract -Inf      sNaN201 ->  NaN201 Invalid_operation
 610 dqsub878 subtract -1000     sNaN211 ->  NaN211 Invalid_operation
 611 dqsub879 subtract  1000    -sNaN221 -> -NaN221 Invalid_operation
 612 dqsub880 subtract  Inf      sNaN231 ->  NaN231 Invalid_operation
 613 dqsub881 subtract  NaN025   sNaN241 ->  NaN241 Invalid_operation
 614
 615 -- edge case spills
 616 dqsub901 subtract  2.E-3  1.002  -> -1.000
 617 dqsub902 subtract  2.0E-3  1.002  -> -1.0000
 618 dqsub903 subtract  2.00E-3  1.0020  -> -1.00000
 619 dqsub904 subtract  2.000E-3  1.00200  -> -1.000000
 620 dqsub905 subtract  2.0000E-3  1.002000  -> -1.0000000
 621 dqsub906 subtract  2.00000E-3  1.0020000  -> -1.00000000
 622 dqsub907 subtract  2.000000E-3  1.00200000  -> -1.000000000
 623 dqsub908 subtract  2.0000000E-3  1.002000000  -> -1.0000000000
 624
 625 -- subnormals and overflows covered under Add
 626
 627 -- Examples from SQL proposal (Krishna Kulkarni)
 628 dqsub1125  subtract 130E-2  120E-2 -> 0.10
 629 dqsub1126  subtract 130E-2  12E-1  -> 0.10
 630 dqsub1127  subtract 130E-2  1E0    -> 0.30
 631 dqsub1128  subtract 1E2     1E4    -> -9.9E+3
 632
 633 -- Null tests
 634 dqsub9990 subtract 10  # -> NaN Invalid_operation
 635 dqsub9991 subtract  # 10 -> NaN Invalid_operation