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------------------------------------------------------------------------ 20version: 2.59 21 22-- This set of tests are for decQuads only; all arguments are 23-- representable in a decQuad 24extended: 1 25clamp: 1 26precision: 34 27maxExponent: 6144 28minExponent: -6143 29rounding: half_even 30 31-- [first group are 'quick confidence check'] 32dqsub001 subtract 0 0 -> '0' 33dqsub002 subtract 1 1 -> '0' 34dqsub003 subtract 1 2 -> '-1' 35dqsub004 subtract 2 1 -> '1' 36dqsub005 subtract 2 2 -> '0' 37dqsub006 subtract 3 2 -> '1' 38dqsub007 subtract 2 3 -> '-1' 39 40dqsub011 subtract -0 0 -> '-0' 41dqsub012 subtract -1 1 -> '-2' 42dqsub013 subtract -1 2 -> '-3' 43dqsub014 subtract -2 1 -> '-3' 44dqsub015 subtract -2 2 -> '-4' 45dqsub016 subtract -3 2 -> '-5' 46dqsub017 subtract -2 3 -> '-5' 47 48dqsub021 subtract 0 -0 -> '0' 49dqsub022 subtract 1 -1 -> '2' 50dqsub023 subtract 1 -2 -> '3' 51dqsub024 subtract 2 -1 -> '3' 52dqsub025 subtract 2 -2 -> '4' 53dqsub026 subtract 3 -2 -> '5' 54dqsub027 subtract 2 -3 -> '5' 55 56dqsub030 subtract 11 1 -> 10 57dqsub031 subtract 10 1 -> 9 58dqsub032 subtract 9 1 -> 8 59dqsub033 subtract 1 1 -> 0 60dqsub034 subtract 0 1 -> -1 61dqsub035 subtract -1 1 -> -2 62dqsub036 subtract -9 1 -> -10 63dqsub037 subtract -10 1 -> -11 64dqsub038 subtract -11 1 -> -12 65 66dqsub040 subtract '5.75' '3.3' -> '2.45' 67dqsub041 subtract '5' '-3' -> '8' 68dqsub042 subtract '-5' '-3' -> '-2' 69dqsub043 subtract '-7' '2.5' -> '-9.5' 70dqsub044 subtract '0.7' '0.3' -> '0.4' 71dqsub045 subtract '1.3' '0.3' -> '1.0' 72dqsub046 subtract '1.25' '1.25' -> '0.00' 73 74dqsub050 subtract '1.23456789' '1.00000000' -> '0.23456789' 75dqsub051 subtract '1.23456789' '1.00000089' -> '0.23456700' 76 77dqsub060 subtract '70' '10000e+34' -> '-1.000000000000000000000000000000000E+38' Inexact Rounded 78dqsub061 subtract '700' '10000e+34' -> '-1.000000000000000000000000000000000E+38' Inexact Rounded 79dqsub062 subtract '7000' '10000e+34' -> '-9.999999999999999999999999999999999E+37' Inexact Rounded 80dqsub063 subtract '70000' '10000e+34' -> '-9.999999999999999999999999999999993E+37' Rounded 81dqsub064 subtract '700000' '10000e+34' -> '-9.999999999999999999999999999999930E+37' Rounded 82 -- symmetry: 83dqsub065 subtract '10000e+34' '70' -> '1.000000000000000000000000000000000E+38' Inexact Rounded 84dqsub066 subtract '10000e+34' '700' -> '1.000000000000000000000000000000000E+38' Inexact Rounded 85dqsub067 subtract '10000e+34' '7000' -> '9.999999999999999999999999999999999E+37' Inexact Rounded 86dqsub068 subtract '10000e+34' '70000' -> '9.999999999999999999999999999999993E+37' Rounded 87dqsub069 subtract '10000e+34' '700000' -> '9.999999999999999999999999999999930E+37' Rounded 88 89 -- some of the next group are really constructor tests 90dqsub090 subtract '00.0' '0.0' -> '0.0' 91dqsub091 subtract '00.0' '0.00' -> '0.00' 92dqsub092 subtract '0.00' '00.0' -> '0.00' 93dqsub093 subtract '00.0' '0.00' -> '0.00' 94dqsub094 subtract '0.00' '00.0' -> '0.00' 95dqsub095 subtract '3' '.3' -> '2.7' 96dqsub096 subtract '3.' '.3' -> '2.7' 97dqsub097 subtract '3.0' '.3' -> '2.7' 98dqsub098 subtract '3.00' '.3' -> '2.70' 99dqsub099 subtract '3' '3' -> '0' 100dqsub100 subtract '3' '+3' -> '0' 101dqsub101 subtract '3' '-3' -> '6' 102dqsub102 subtract '3' '0.3' -> '2.7' 103dqsub103 subtract '3.' '0.3' -> '2.7' 104dqsub104 subtract '3.0' '0.3' -> '2.7' 105dqsub105 subtract '3.00' '0.3' -> '2.70' 106dqsub106 subtract '3' '3.0' -> '0.0' 107dqsub107 subtract '3' '+3.0' -> '0.0' 108dqsub108 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. 114dqsub120 subtract '10.23456784' '10.23456789' -> '-5E-8' 115dqsub121 subtract '10.23456785' '10.23456789' -> '-4E-8' 116dqsub122 subtract '10.23456786' '10.23456789' -> '-3E-8' 117dqsub123 subtract '10.23456787' '10.23456789' -> '-2E-8' 118dqsub124 subtract '10.23456788' '10.23456789' -> '-1E-8' 119dqsub125 subtract '10.23456789' '10.23456789' -> '0E-8' 120dqsub126 subtract '10.23456790' '10.23456789' -> '1E-8' 121dqsub127 subtract '10.23456791' '10.23456789' -> '2E-8' 122dqsub128 subtract '10.23456792' '10.23456789' -> '3E-8' 123dqsub129 subtract '10.23456793' '10.23456789' -> '4E-8' 124dqsub130 subtract '10.23456794' '10.23456789' -> '5E-8' 125dqsub131 subtract '10.23456781' '10.23456786' -> '-5E-8' 126dqsub132 subtract '10.23456782' '10.23456786' -> '-4E-8' 127dqsub133 subtract '10.23456783' '10.23456786' -> '-3E-8' 128dqsub134 subtract '10.23456784' '10.23456786' -> '-2E-8' 129dqsub135 subtract '10.23456785' '10.23456786' -> '-1E-8' 130dqsub136 subtract '10.23456786' '10.23456786' -> '0E-8' 131dqsub137 subtract '10.23456787' '10.23456786' -> '1E-8' 132dqsub138 subtract '10.23456788' '10.23456786' -> '2E-8' 133dqsub139 subtract '10.23456789' '10.23456786' -> '3E-8' 134dqsub140 subtract '10.23456790' '10.23456786' -> '4E-8' 135dqsub141 subtract '10.23456791' '10.23456786' -> '5E-8' 136dqsub142 subtract '1' '0.999999999' -> '1E-9' 137dqsub143 subtract '0.999999999' '1' -> '-1E-9' 138dqsub144 subtract '-10.23456780' '-10.23456786' -> '6E-8' 139dqsub145 subtract '-10.23456790' '-10.23456786' -> '-4E-8' 140dqsub146 subtract '-10.23456791' '-10.23456786' -> '-5E-8' 141 142-- additional scaled arithmetic tests [0.97 problem] 143dqsub160 subtract '0' '.1' -> '-0.1' 144dqsub161 subtract '00' '.97983' -> '-0.97983' 145dqsub162 subtract '0' '.9' -> '-0.9' 146dqsub163 subtract '0' '0.102' -> '-0.102' 147dqsub164 subtract '0' '.4' -> '-0.4' 148dqsub165 subtract '0' '.307' -> '-0.307' 149dqsub166 subtract '0' '.43822' -> '-0.43822' 150dqsub167 subtract '0' '.911' -> '-0.911' 151dqsub168 subtract '.0' '.02' -> '-0.02' 152dqsub169 subtract '00' '.392' -> '-0.392' 153dqsub170 subtract '0' '.26' -> '-0.26' 154dqsub171 subtract '0' '0.51' -> '-0.51' 155dqsub172 subtract '0' '.2234' -> '-0.2234' 156dqsub173 subtract '0' '.2' -> '-0.2' 157dqsub174 subtract '.0' '.0008' -> '-0.0008' 158-- 0. on left 159dqsub180 subtract '0.0' '-.1' -> '0.1' 160dqsub181 subtract '0.00' '-.97983' -> '0.97983' 161dqsub182 subtract '0.0' '-.9' -> '0.9' 162dqsub183 subtract '0.0' '-0.102' -> '0.102' 163dqsub184 subtract '0.0' '-.4' -> '0.4' 164dqsub185 subtract '0.0' '-.307' -> '0.307' 165dqsub186 subtract '0.0' '-.43822' -> '0.43822' 166dqsub187 subtract '0.0' '-.911' -> '0.911' 167dqsub188 subtract '0.0' '-.02' -> '0.02' 168dqsub189 subtract '0.00' '-.392' -> '0.392' 169dqsub190 subtract '0.0' '-.26' -> '0.26' 170dqsub191 subtract '0.0' '-0.51' -> '0.51' 171dqsub192 subtract '0.0' '-.2234' -> '0.2234' 172dqsub193 subtract '0.0' '-.2' -> '0.2' 173dqsub194 subtract '0.0' '-.0008' -> '0.0008' 174-- negatives of same 175dqsub200 subtract '0' '-.1' -> '0.1' 176dqsub201 subtract '00' '-.97983' -> '0.97983' 177dqsub202 subtract '0' '-.9' -> '0.9' 178dqsub203 subtract '0' '-0.102' -> '0.102' 179dqsub204 subtract '0' '-.4' -> '0.4' 180dqsub205 subtract '0' '-.307' -> '0.307' 181dqsub206 subtract '0' '-.43822' -> '0.43822' 182dqsub207 subtract '0' '-.911' -> '0.911' 183dqsub208 subtract '.0' '-.02' -> '0.02' 184dqsub209 subtract '00' '-.392' -> '0.392' 185dqsub210 subtract '0' '-.26' -> '0.26' 186dqsub211 subtract '0' '-0.51' -> '0.51' 187dqsub212 subtract '0' '-.2234' -> '0.2234' 188dqsub213 subtract '0' '-.2' -> '0.2' 189dqsub214 subtract '.0' '-.0008' -> '0.0008' 190 191-- more fixed, LHS swaps [really the same as testcases under add] 192dqsub220 subtract '-56267E-12' 0 -> '-5.6267E-8' 193dqsub221 subtract '-56267E-11' 0 -> '-5.6267E-7' 194dqsub222 subtract '-56267E-10' 0 -> '-0.0000056267' 195dqsub223 subtract '-56267E-9' 0 -> '-0.000056267' 196dqsub224 subtract '-56267E-8' 0 -> '-0.00056267' 197dqsub225 subtract '-56267E-7' 0 -> '-0.0056267' 198dqsub226 subtract '-56267E-6' 0 -> '-0.056267' 199dqsub227 subtract '-56267E-5' 0 -> '-0.56267' 200dqsub228 subtract '-56267E-2' 0 -> '-562.67' 201dqsub229 subtract '-56267E-1' 0 -> '-5626.7' 202dqsub230 subtract '-56267E-0' 0 -> '-56267' 203-- symmetry ... 204dqsub240 subtract 0 '-56267E-12' -> '5.6267E-8' 205dqsub241 subtract 0 '-56267E-11' -> '5.6267E-7' 206dqsub242 subtract 0 '-56267E-10' -> '0.0000056267' 207dqsub243 subtract 0 '-56267E-9' -> '0.000056267' 208dqsub244 subtract 0 '-56267E-8' -> '0.00056267' 209dqsub245 subtract 0 '-56267E-7' -> '0.0056267' 210dqsub246 subtract 0 '-56267E-6' -> '0.056267' 211dqsub247 subtract 0 '-56267E-5' -> '0.56267' 212dqsub248 subtract 0 '-56267E-2' -> '562.67' 213dqsub249 subtract 0 '-56267E-1' -> '5626.7' 214dqsub250 subtract 0 '-56267E-0' -> '56267' 215 216-- now some more from the 'new' add 217dqsub301 subtract '1.23456789' '1.00000000' -> '0.23456789' 218dqsub302 subtract '1.23456789' '1.00000011' -> '0.23456778' 219 220-- some carrying effects 221dqsub321 subtract '0.9998' '0.0000' -> '0.9998' 222dqsub322 subtract '0.9998' '0.0001' -> '0.9997' 223dqsub323 subtract '0.9998' '0.0002' -> '0.9996' 224dqsub324 subtract '0.9998' '0.0003' -> '0.9995' 225dqsub325 subtract '0.9998' '-0.0000' -> '0.9998' 226dqsub326 subtract '0.9998' '-0.0001' -> '0.9999' 227dqsub327 subtract '0.9998' '-0.0002' -> '1.0000' 228dqsub328 subtract '0.9998' '-0.0003' -> '1.0001' 229 230-- internal boundaries 231dqsub346 subtract '10000e+9' '7' -> '9999999999993' 232dqsub347 subtract '10000e+9' '70' -> '9999999999930' 233dqsub348 subtract '10000e+9' '700' -> '9999999999300' 234dqsub349 subtract '10000e+9' '7000' -> '9999999993000' 235dqsub350 subtract '10000e+9' '70000' -> '9999999930000' 236dqsub351 subtract '10000e+9' '700000' -> '9999999300000' 237dqsub352 subtract '7' '10000e+9' -> '-9999999999993' 238dqsub353 subtract '70' '10000e+9' -> '-9999999999930' 239dqsub354 subtract '700' '10000e+9' -> '-9999999999300' 240dqsub355 subtract '7000' '10000e+9' -> '-9999999993000' 241dqsub356 subtract '70000' '10000e+9' -> '-9999999930000' 242dqsub357 subtract '700000' '10000e+9' -> '-9999999300000' 243 244-- zero preservation 245dqsub361 subtract 1 '0.0001' -> '0.9999' 246dqsub362 subtract 1 '0.00001' -> '0.99999' 247dqsub363 subtract 1 '0.000001' -> '0.999999' 248dqsub364 subtract 1 '0.0000000000000000000000000000000001' -> '0.9999999999999999999999999999999999' 249dqsub365 subtract 1 '0.00000000000000000000000000000000001' -> '1.000000000000000000000000000000000' Inexact Rounded 250dqsub366 subtract 1 '0.000000000000000000000000000000000001' -> '1.000000000000000000000000000000000' Inexact Rounded 251 252-- some funny zeros [in case of bad signum] 253dqsub370 subtract 1 0 -> 1 254dqsub371 subtract 1 0. -> 1 255dqsub372 subtract 1 .0 -> 1.0 256dqsub373 subtract 1 0.0 -> 1.0 257dqsub374 subtract 0 1 -> -1 258dqsub375 subtract 0. 1 -> -1 259dqsub376 subtract .0 1 -> -1.0 260dqsub377 subtract 0.0 1 -> -1.0 261 262-- leading 0 digit before round 263dqsub910 subtract -103519362 -51897955.3 -> -51621406.7 264dqsub911 subtract 159579.444 89827.5229 -> 69751.9211 265 266dqsub920 subtract 333.0000000000000000000000000123456 33.00000000000000000000000001234566 -> 299.9999999999999999999999999999999 Inexact Rounded 267dqsub921 subtract 333.0000000000000000000000000123456 33.00000000000000000000000001234565 -> 300.0000000000000000000000000000000 Inexact Rounded 268dqsub922 subtract 133.0000000000000000000000000123456 33.00000000000000000000000001234565 -> 99.99999999999999999999999999999995 269dqsub923 subtract 133.0000000000000000000000000123456 33.00000000000000000000000001234564 -> 99.99999999999999999999999999999996 270dqsub924 subtract 133.0000000000000000000000000123456 33.00000000000000000000000001234540 -> 100.0000000000000000000000000000002 Rounded 271dqsub925 subtract 133.0000000000000000000000000123456 43.00000000000000000000000001234560 -> 90.00000000000000000000000000000000 272dqsub926 subtract 133.0000000000000000000000000123456 43.00000000000000000000000001234561 -> 89.99999999999999999999999999999999 273dqsub927 subtract 133.0000000000000000000000000123456 43.00000000000000000000000001234566 -> 89.99999999999999999999999999999994 274dqsub928 subtract 101.0000000000000000000000000123456 91.00000000000000000000000001234566 -> 9.99999999999999999999999999999994 275dqsub929 subtract 101.0000000000000000000000000123456 99.00000000000000000000000001234566 -> 1.99999999999999999999999999999994 276 277-- more LHS swaps [were fixed] 278dqsub390 subtract '-56267E-10' 0 -> '-0.0000056267' 279dqsub391 subtract '-56267E-6' 0 -> '-0.056267' 280dqsub392 subtract '-56267E-5' 0 -> '-0.56267' 281dqsub393 subtract '-56267E-4' 0 -> '-5.6267' 282dqsub394 subtract '-56267E-3' 0 -> '-56.267' 283dqsub395 subtract '-56267E-2' 0 -> '-562.67' 284dqsub396 subtract '-56267E-1' 0 -> '-5626.7' 285dqsub397 subtract '-56267E-0' 0 -> '-56267' 286dqsub398 subtract '-5E-10' 0 -> '-5E-10' 287dqsub399 subtract '-5E-7' 0 -> '-5E-7' 288dqsub400 subtract '-5E-6' 0 -> '-0.000005' 289dqsub401 subtract '-5E-5' 0 -> '-0.00005' 290dqsub402 subtract '-5E-4' 0 -> '-0.0005' 291dqsub403 subtract '-5E-1' 0 -> '-0.5' 292dqsub404 subtract '-5E0' 0 -> '-5' 293dqsub405 subtract '-5E1' 0 -> '-50' 294dqsub406 subtract '-5E5' 0 -> '-500000' 295dqsub407 subtract '-5E33' 0 -> '-5000000000000000000000000000000000' 296dqsub408 subtract '-5E34' 0 -> '-5.000000000000000000000000000000000E+34' Rounded 297dqsub409 subtract '-5E35' 0 -> '-5.000000000000000000000000000000000E+35' Rounded 298dqsub410 subtract '-5E36' 0 -> '-5.000000000000000000000000000000000E+36' Rounded 299dqsub411 subtract '-5E100' 0 -> '-5.000000000000000000000000000000000E+100' Rounded 300 301-- more RHS swaps [were fixed] 302dqsub420 subtract 0 '-56267E-10' -> '0.0000056267' 303dqsub421 subtract 0 '-56267E-6' -> '0.056267' 304dqsub422 subtract 0 '-56267E-5' -> '0.56267' 305dqsub423 subtract 0 '-56267E-4' -> '5.6267' 306dqsub424 subtract 0 '-56267E-3' -> '56.267' 307dqsub425 subtract 0 '-56267E-2' -> '562.67' 308dqsub426 subtract 0 '-56267E-1' -> '5626.7' 309dqsub427 subtract 0 '-56267E-0' -> '56267' 310dqsub428 subtract 0 '-5E-10' -> '5E-10' 311dqsub429 subtract 0 '-5E-7' -> '5E-7' 312dqsub430 subtract 0 '-5E-6' -> '0.000005' 313dqsub431 subtract 0 '-5E-5' -> '0.00005' 314dqsub432 subtract 0 '-5E-4' -> '0.0005' 315dqsub433 subtract 0 '-5E-1' -> '0.5' 316dqsub434 subtract 0 '-5E0' -> '5' 317dqsub435 subtract 0 '-5E1' -> '50' 318dqsub436 subtract 0 '-5E5' -> '500000' 319dqsub437 subtract 0 '-5E33' -> '5000000000000000000000000000000000' 320dqsub438 subtract 0 '-5E34' -> '5.000000000000000000000000000000000E+34' Rounded 321dqsub439 subtract 0 '-5E35' -> '5.000000000000000000000000000000000E+35' Rounded 322dqsub440 subtract 0 '-5E36' -> '5.000000000000000000000000000000000E+36' Rounded 323dqsub441 subtract 0 '-5E100' -> '5.000000000000000000000000000000000E+100' Rounded 324 325 326-- try borderline precision, with carries, etc. 327dqsub461 subtract '1E+16' '1' -> '9999999999999999' 328dqsub462 subtract '1E+12' '-1.111' -> '1000000000001.111' 329dqsub463 subtract '1.111' '-1E+12' -> '1000000000001.111' 330dqsub464 subtract '-1' '-1E+16' -> '9999999999999999' 331dqsub465 subtract '7E+15' '1' -> '6999999999999999' 332dqsub466 subtract '7E+12' '-1.111' -> '7000000000001.111' 333dqsub467 subtract '1.111' '-7E+12' -> '7000000000001.111' 334dqsub468 subtract '-1' '-7E+15' -> '6999999999999999' 335 336-- 1234567890123456 1234567890123456 1 23456789012345 337dqsub470 subtract '0.4444444444444444444444444444444444' '-0.5555555555555555555555555555555563' -> '1.000000000000000000000000000000001' Inexact Rounded 338dqsub471 subtract '0.4444444444444444444444444444444444' '-0.5555555555555555555555555555555562' -> '1.000000000000000000000000000000001' Inexact Rounded 339dqsub472 subtract '0.4444444444444444444444444444444444' '-0.5555555555555555555555555555555561' -> '1.000000000000000000000000000000000' Inexact Rounded 340dqsub473 subtract '0.4444444444444444444444444444444444' '-0.5555555555555555555555555555555560' -> '1.000000000000000000000000000000000' Inexact Rounded 341dqsub474 subtract '0.4444444444444444444444444444444444' '-0.5555555555555555555555555555555559' -> '1.000000000000000000000000000000000' Inexact Rounded 342dqsub475 subtract '0.4444444444444444444444444444444444' '-0.5555555555555555555555555555555558' -> '1.000000000000000000000000000000000' Inexact Rounded 343dqsub476 subtract '0.4444444444444444444444444444444444' '-0.5555555555555555555555555555555557' -> '1.000000000000000000000000000000000' Inexact Rounded 344dqsub477 subtract '0.4444444444444444444444444444444444' '-0.5555555555555555555555555555555556' -> '1.000000000000000000000000000000000' Rounded 345dqsub478 subtract '0.4444444444444444444444444444444444' '-0.5555555555555555555555555555555555' -> '0.9999999999999999999999999999999999' 346dqsub479 subtract '0.4444444444444444444444444444444444' '-0.5555555555555555555555555555555554' -> '0.9999999999999999999999999999999998' 347dqsub480 subtract '0.4444444444444444444444444444444444' '-0.5555555555555555555555555555555553' -> '0.9999999999999999999999999999999997' 348dqsub481 subtract '0.4444444444444444444444444444444444' '-0.5555555555555555555555555555555552' -> '0.9999999999999999999999999999999996' 349dqsub482 subtract '0.4444444444444444444444444444444444' '-0.5555555555555555555555555555555551' -> '0.9999999999999999999999999999999995' 350dqsub483 subtract '0.4444444444444444444444444444444444' '-0.5555555555555555555555555555555550' -> '0.9999999999999999999999999999999994' 351 352-- and some more, including residue effects and different roundings 353rounding: half_up 354dqsub500 subtract '1231234555555555555555555567456789' 0 -> '1231234555555555555555555567456789' 355dqsub501 subtract '1231234555555555555555555567456789' 0.000000001 -> '1231234555555555555555555567456789' Inexact Rounded 356dqsub502 subtract '1231234555555555555555555567456789' 0.000001 -> '1231234555555555555555555567456789' Inexact Rounded 357dqsub503 subtract '1231234555555555555555555567456789' 0.1 -> '1231234555555555555555555567456789' Inexact Rounded 358dqsub504 subtract '1231234555555555555555555567456789' 0.4 -> '1231234555555555555555555567456789' Inexact Rounded 359dqsub505 subtract '1231234555555555555555555567456789' 0.49 -> '1231234555555555555555555567456789' Inexact Rounded 360dqsub506 subtract '1231234555555555555555555567456789' 0.499999 -> '1231234555555555555555555567456789' Inexact Rounded 361dqsub507 subtract '1231234555555555555555555567456789' 0.499999999 -> '1231234555555555555555555567456789' Inexact Rounded 362dqsub508 subtract '1231234555555555555555555567456789' 0.5 -> '1231234555555555555555555567456789' Inexact Rounded 363dqsub509 subtract '1231234555555555555555555567456789' 0.500000001 -> '1231234555555555555555555567456788' Inexact Rounded 364dqsub510 subtract '1231234555555555555555555567456789' 0.500001 -> '1231234555555555555555555567456788' Inexact Rounded 365dqsub511 subtract '1231234555555555555555555567456789' 0.51 -> '1231234555555555555555555567456788' Inexact Rounded 366dqsub512 subtract '1231234555555555555555555567456789' 0.6 -> '1231234555555555555555555567456788' Inexact Rounded 367dqsub513 subtract '1231234555555555555555555567456789' 0.9 -> '1231234555555555555555555567456788' Inexact Rounded 368dqsub514 subtract '1231234555555555555555555567456789' 0.99999 -> '1231234555555555555555555567456788' Inexact Rounded 369dqsub515 subtract '1231234555555555555555555567456789' 0.999999999 -> '1231234555555555555555555567456788' Inexact Rounded 370dqsub516 subtract '1231234555555555555555555567456789' 1 -> '1231234555555555555555555567456788' 371dqsub517 subtract '1231234555555555555555555567456789' 1.000000001 -> '1231234555555555555555555567456788' Inexact Rounded 372dqsub518 subtract '1231234555555555555555555567456789' 1.00001 -> '1231234555555555555555555567456788' Inexact Rounded 373dqsub519 subtract '1231234555555555555555555567456789' 1.1 -> '1231234555555555555555555567456788' Inexact Rounded 374 375rounding: half_even 376dqsub520 subtract '1231234555555555555555555567456789' 0 -> '1231234555555555555555555567456789' 377dqsub521 subtract '1231234555555555555555555567456789' 0.000000001 -> '1231234555555555555555555567456789' Inexact Rounded 378dqsub522 subtract '1231234555555555555555555567456789' 0.000001 -> '1231234555555555555555555567456789' Inexact Rounded 379dqsub523 subtract '1231234555555555555555555567456789' 0.1 -> '1231234555555555555555555567456789' Inexact Rounded 380dqsub524 subtract '1231234555555555555555555567456789' 0.4 -> '1231234555555555555555555567456789' Inexact Rounded 381dqsub525 subtract '1231234555555555555555555567456789' 0.49 -> '1231234555555555555555555567456789' Inexact Rounded 382dqsub526 subtract '1231234555555555555555555567456789' 0.499999 -> '1231234555555555555555555567456789' Inexact Rounded 383dqsub527 subtract '1231234555555555555555555567456789' 0.499999999 -> '1231234555555555555555555567456789' Inexact Rounded 384dqsub528 subtract '1231234555555555555555555567456789' 0.5 -> '1231234555555555555555555567456788' Inexact Rounded 385dqsub529 subtract '1231234555555555555555555567456789' 0.500000001 -> '1231234555555555555555555567456788' Inexact Rounded 386dqsub530 subtract '1231234555555555555555555567456789' 0.500001 -> '1231234555555555555555555567456788' Inexact Rounded 387dqsub531 subtract '1231234555555555555555555567456789' 0.51 -> '1231234555555555555555555567456788' Inexact Rounded 388dqsub532 subtract '1231234555555555555555555567456789' 0.6 -> '1231234555555555555555555567456788' Inexact Rounded 389dqsub533 subtract '1231234555555555555555555567456789' 0.9 -> '1231234555555555555555555567456788' Inexact Rounded 390dqsub534 subtract '1231234555555555555555555567456789' 0.99999 -> '1231234555555555555555555567456788' Inexact Rounded 391dqsub535 subtract '1231234555555555555555555567456789' 0.999999999 -> '1231234555555555555555555567456788' Inexact Rounded 392dqsub536 subtract '1231234555555555555555555567456789' 1 -> '1231234555555555555555555567456788' 393dqsub537 subtract '1231234555555555555555555567456789' 1.00000001 -> '1231234555555555555555555567456788' Inexact Rounded 394dqsub538 subtract '1231234555555555555555555567456789' 1.00001 -> '1231234555555555555555555567456788' Inexact Rounded 395dqsub539 subtract '1231234555555555555555555567456789' 1.1 -> '1231234555555555555555555567456788' Inexact Rounded 396-- critical few with even bottom digit... 397dqsub540 subtract '1231234555555555555555555567456788' 0.499999999 -> '1231234555555555555555555567456788' Inexact Rounded 398dqsub541 subtract '1231234555555555555555555567456788' 0.5 -> '1231234555555555555555555567456788' Inexact Rounded 399dqsub542 subtract '1231234555555555555555555567456788' 0.500000001 -> '1231234555555555555555555567456787' Inexact Rounded 400 401rounding: down 402dqsub550 subtract '1231234555555555555555555567456789' 0 -> '1231234555555555555555555567456789' 403dqsub551 subtract '1231234555555555555555555567456789' 0.000000001 -> '1231234555555555555555555567456788' Inexact Rounded 404dqsub552 subtract '1231234555555555555555555567456789' 0.000001 -> '1231234555555555555555555567456788' Inexact Rounded 405dqsub553 subtract '1231234555555555555555555567456789' 0.1 -> '1231234555555555555555555567456788' Inexact Rounded 406dqsub554 subtract '1231234555555555555555555567456789' 0.4 -> '1231234555555555555555555567456788' Inexact Rounded 407dqsub555 subtract '1231234555555555555555555567456789' 0.49 -> '1231234555555555555555555567456788' Inexact Rounded 408dqsub556 subtract '1231234555555555555555555567456789' 0.499999 -> '1231234555555555555555555567456788' Inexact Rounded 409dqsub557 subtract '1231234555555555555555555567456789' 0.499999999 -> '1231234555555555555555555567456788' Inexact Rounded 410dqsub558 subtract '1231234555555555555555555567456789' 0.5 -> '1231234555555555555555555567456788' Inexact Rounded 411dqsub559 subtract '1231234555555555555555555567456789' 0.500000001 -> '1231234555555555555555555567456788' Inexact Rounded 412dqsub560 subtract '1231234555555555555555555567456789' 0.500001 -> '1231234555555555555555555567456788' Inexact Rounded 413dqsub561 subtract '1231234555555555555555555567456789' 0.51 -> '1231234555555555555555555567456788' Inexact Rounded 414dqsub562 subtract '1231234555555555555555555567456789' 0.6 -> '1231234555555555555555555567456788' Inexact Rounded 415dqsub563 subtract '1231234555555555555555555567456789' 0.9 -> '1231234555555555555555555567456788' Inexact Rounded 416dqsub564 subtract '1231234555555555555555555567456789' 0.99999 -> '1231234555555555555555555567456788' Inexact Rounded 417dqsub565 subtract '1231234555555555555555555567456789' 0.999999999 -> '1231234555555555555555555567456788' Inexact Rounded 418dqsub566 subtract '1231234555555555555555555567456789' 1 -> '1231234555555555555555555567456788' 419dqsub567 subtract '1231234555555555555555555567456789' 1.00000001 -> '1231234555555555555555555567456787' Inexact Rounded 420dqsub568 subtract '1231234555555555555555555567456789' 1.00001 -> '1231234555555555555555555567456787' Inexact Rounded 421dqsub569 subtract '1231234555555555555555555567456789' 1.1 -> '1231234555555555555555555567456787' Inexact Rounded 422 423-- symmetry... 424rounding: half_up 425dqsub600 subtract 0 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789' 426dqsub601 subtract 0.000000001 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789' Inexact Rounded 427dqsub602 subtract 0.000001 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789' Inexact Rounded 428dqsub603 subtract 0.1 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789' Inexact Rounded 429dqsub604 subtract 0.4 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789' Inexact Rounded 430dqsub605 subtract 0.49 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789' Inexact Rounded 431dqsub606 subtract 0.499999 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789' Inexact Rounded 432dqsub607 subtract 0.499999999 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789' Inexact Rounded 433dqsub608 subtract 0.5 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789' Inexact Rounded 434dqsub609 subtract 0.500000001 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded 435dqsub610 subtract 0.500001 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded 436dqsub611 subtract 0.51 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded 437dqsub612 subtract 0.6 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded 438dqsub613 subtract 0.9 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded 439dqsub614 subtract 0.99999 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded 440dqsub615 subtract 0.999999999 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded 441dqsub616 subtract 1 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' 442dqsub617 subtract 1.000000001 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded 443dqsub618 subtract 1.00001 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded 444dqsub619 subtract 1.1 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded 445 446rounding: half_even 447dqsub620 subtract 0 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789' 448dqsub621 subtract 0.000000001 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789' Inexact Rounded 449dqsub622 subtract 0.000001 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789' Inexact Rounded 450dqsub623 subtract 0.1 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789' Inexact Rounded 451dqsub624 subtract 0.4 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789' Inexact Rounded 452dqsub625 subtract 0.49 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789' Inexact Rounded 453dqsub626 subtract 0.499999 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789' Inexact Rounded 454dqsub627 subtract 0.499999999 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789' Inexact Rounded 455dqsub628 subtract 0.5 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded 456dqsub629 subtract 0.500000001 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded 457dqsub630 subtract 0.500001 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded 458dqsub631 subtract 0.51 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded 459dqsub632 subtract 0.6 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded 460dqsub633 subtract 0.9 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded 461dqsub634 subtract 0.99999 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded 462dqsub635 subtract 0.999999999 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded 463dqsub636 subtract 1 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' 464dqsub637 subtract 1.00000001 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded 465dqsub638 subtract 1.00001 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded 466dqsub639 subtract 1.1 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded 467-- critical few with even bottom digit... 468dqsub640 subtract 0.499999999 '1231234555555555555555555567456788' -> '-1231234555555555555555555567456788' Inexact Rounded 469dqsub641 subtract 0.5 '1231234555555555555555555567456788' -> '-1231234555555555555555555567456788' Inexact Rounded 470dqsub642 subtract 0.500000001 '1231234555555555555555555567456788' -> '-1231234555555555555555555567456787' Inexact Rounded 471 472rounding: down 473dqsub650 subtract 0 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456789' 474dqsub651 subtract 0.000000001 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded 475dqsub652 subtract 0.000001 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded 476dqsub653 subtract 0.1 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded 477dqsub654 subtract 0.4 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded 478dqsub655 subtract 0.49 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded 479dqsub656 subtract 0.499999 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded 480dqsub657 subtract 0.499999999 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded 481dqsub658 subtract 0.5 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded 482dqsub659 subtract 0.500000001 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded 483dqsub660 subtract 0.500001 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded 484dqsub661 subtract 0.51 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded 485dqsub662 subtract 0.6 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded 486dqsub663 subtract 0.9 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded 487dqsub664 subtract 0.99999 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded 488dqsub665 subtract 0.999999999 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' Inexact Rounded 489dqsub666 subtract 1 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456788' 490dqsub667 subtract 1.00000001 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456787' Inexact Rounded 491dqsub668 subtract 1.00001 '1231234555555555555555555567456789' -> '-1231234555555555555555555567456787' Inexact Rounded 492dqsub669 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 497rounding: half_up 498dqsub670 subtract '1234567456789' '1234567456788.1' -> 0.9 499dqsub671 subtract '1234567456789' '1234567456788.9' -> 0.1 500dqsub672 subtract '1234567456789' '1234567456789.1' -> -0.1 501dqsub673 subtract '1234567456789' '1234567456789.5' -> -0.5 502dqsub674 subtract '1234567456789' '1234567456789.9' -> -0.9 503 504rounding: half_even 505dqsub680 subtract '1234567456789' '1234567456788.1' -> 0.9 506dqsub681 subtract '1234567456789' '1234567456788.9' -> 0.1 507dqsub682 subtract '1234567456789' '1234567456789.1' -> -0.1 508dqsub683 subtract '1234567456789' '1234567456789.5' -> -0.5 509dqsub684 subtract '1234567456789' '1234567456789.9' -> -0.9 510 511dqsub685 subtract '1234567456788' '1234567456787.1' -> 0.9 512dqsub686 subtract '1234567456788' '1234567456787.9' -> 0.1 513dqsub687 subtract '1234567456788' '1234567456788.1' -> -0.1 514dqsub688 subtract '1234567456788' '1234567456788.5' -> -0.5 515dqsub689 subtract '1234567456788' '1234567456788.9' -> -0.9 516 517rounding: down 518dqsub690 subtract '1234567456789' '1234567456788.1' -> 0.9 519dqsub691 subtract '1234567456789' '1234567456788.9' -> 0.1 520dqsub692 subtract '1234567456789' '1234567456789.1' -> -0.1 521dqsub693 subtract '1234567456789' '1234567456789.5' -> -0.5 522dqsub694 subtract '1234567456789' '1234567456789.9' -> -0.9 523 524-- Specials 525dqsub780 subtract -Inf Inf -> -Infinity 526dqsub781 subtract -Inf 1000 -> -Infinity 527dqsub782 subtract -Inf 1 -> -Infinity 528dqsub783 subtract -Inf -0 -> -Infinity 529dqsub784 subtract -Inf -1 -> -Infinity 530dqsub785 subtract -Inf -1000 -> -Infinity 531dqsub787 subtract -1000 Inf -> -Infinity 532dqsub788 subtract -Inf Inf -> -Infinity 533dqsub789 subtract -1 Inf -> -Infinity 534dqsub790 subtract 0 Inf -> -Infinity 535dqsub791 subtract 1 Inf -> -Infinity 536dqsub792 subtract 1000 Inf -> -Infinity 537 538dqsub800 subtract Inf Inf -> NaN Invalid_operation 539dqsub801 subtract Inf 1000 -> Infinity 540dqsub802 subtract Inf 1 -> Infinity 541dqsub803 subtract Inf 0 -> Infinity 542dqsub804 subtract Inf -0 -> Infinity 543dqsub805 subtract Inf -1 -> Infinity 544dqsub806 subtract Inf -1000 -> Infinity 545dqsub807 subtract Inf -Inf -> Infinity 546dqsub808 subtract -1000 -Inf -> Infinity 547dqsub809 subtract -Inf -Inf -> NaN Invalid_operation 548dqsub810 subtract -1 -Inf -> Infinity 549dqsub811 subtract -0 -Inf -> Infinity 550dqsub812 subtract 0 -Inf -> Infinity 551dqsub813 subtract 1 -Inf -> Infinity 552dqsub814 subtract 1000 -Inf -> Infinity 553dqsub815 subtract Inf -Inf -> Infinity 554 555dqsub821 subtract NaN Inf -> NaN 556dqsub822 subtract -NaN 1000 -> -NaN 557dqsub823 subtract NaN 1 -> NaN 558dqsub824 subtract NaN 0 -> NaN 559dqsub825 subtract NaN -0 -> NaN 560dqsub826 subtract NaN -1 -> NaN 561dqsub827 subtract NaN -1000 -> NaN 562dqsub828 subtract NaN -Inf -> NaN 563dqsub829 subtract -NaN NaN -> -NaN 564dqsub830 subtract -Inf NaN -> NaN 565dqsub831 subtract -1000 NaN -> NaN 566dqsub832 subtract -1 NaN -> NaN 567dqsub833 subtract -0 NaN -> NaN 568dqsub834 subtract 0 NaN -> NaN 569dqsub835 subtract 1 NaN -> NaN 570dqsub836 subtract 1000 -NaN -> -NaN 571dqsub837 subtract Inf NaN -> NaN 572 573dqsub841 subtract sNaN Inf -> NaN Invalid_operation 574dqsub842 subtract -sNaN 1000 -> -NaN Invalid_operation 575dqsub843 subtract sNaN 1 -> NaN Invalid_operation 576dqsub844 subtract sNaN 0 -> NaN Invalid_operation 577dqsub845 subtract sNaN -0 -> NaN Invalid_operation 578dqsub846 subtract sNaN -1 -> NaN Invalid_operation 579dqsub847 subtract sNaN -1000 -> NaN Invalid_operation 580dqsub848 subtract sNaN NaN -> NaN Invalid_operation 581dqsub849 subtract sNaN sNaN -> NaN Invalid_operation 582dqsub850 subtract NaN sNaN -> NaN Invalid_operation 583dqsub851 subtract -Inf -sNaN -> -NaN Invalid_operation 584dqsub852 subtract -1000 sNaN -> NaN Invalid_operation 585dqsub853 subtract -1 sNaN -> NaN Invalid_operation 586dqsub854 subtract -0 sNaN -> NaN Invalid_operation 587dqsub855 subtract 0 sNaN -> NaN Invalid_operation 588dqsub856 subtract 1 sNaN -> NaN Invalid_operation 589dqsub857 subtract 1000 sNaN -> NaN Invalid_operation 590dqsub858 subtract Inf sNaN -> NaN Invalid_operation 591dqsub859 subtract NaN sNaN -> NaN Invalid_operation 592 593-- propagating NaNs 594dqsub861 subtract NaN01 -Inf -> NaN1 595dqsub862 subtract -NaN02 -1000 -> -NaN2 596dqsub863 subtract NaN03 1000 -> NaN3 597dqsub864 subtract NaN04 Inf -> NaN4 598dqsub865 subtract NaN05 NaN61 -> NaN5 599dqsub866 subtract -Inf -NaN71 -> -NaN71 600dqsub867 subtract -1000 NaN81 -> NaN81 601dqsub868 subtract 1000 NaN91 -> NaN91 602dqsub869 subtract Inf NaN101 -> NaN101 603dqsub871 subtract sNaN011 -Inf -> NaN11 Invalid_operation 604dqsub872 subtract sNaN012 -1000 -> NaN12 Invalid_operation 605dqsub873 subtract -sNaN013 1000 -> -NaN13 Invalid_operation 606dqsub874 subtract sNaN014 NaN171 -> NaN14 Invalid_operation 607dqsub875 subtract sNaN015 sNaN181 -> NaN15 Invalid_operation 608dqsub876 subtract NaN016 sNaN191 -> NaN191 Invalid_operation 609dqsub877 subtract -Inf sNaN201 -> NaN201 Invalid_operation 610dqsub878 subtract -1000 sNaN211 -> NaN211 Invalid_operation 611dqsub879 subtract 1000 -sNaN221 -> -NaN221 Invalid_operation 612dqsub880 subtract Inf sNaN231 -> NaN231 Invalid_operation 613dqsub881 subtract NaN025 sNaN241 -> NaN241 Invalid_operation 614 615-- edge case spills 616dqsub901 subtract 2.E-3 1.002 -> -1.000 617dqsub902 subtract 2.0E-3 1.002 -> -1.0000 618dqsub903 subtract 2.00E-3 1.0020 -> -1.00000 619dqsub904 subtract 2.000E-3 1.00200 -> -1.000000 620dqsub905 subtract 2.0000E-3 1.002000 -> -1.0000000 621dqsub906 subtract 2.00000E-3 1.0020000 -> -1.00000000 622dqsub907 subtract 2.000000E-3 1.00200000 -> -1.000000000 623dqsub908 subtract 2.0000000E-3 1.002000000 -> -1.0000000000 624 625-- subnormals and overflows covered under Add 626 627-- Examples from SQL proposal (Krishna Kulkarni) 628dqsub1125 subtract 130E-2 120E-2 -> 0.10 629dqsub1126 subtract 130E-2 12E-1 -> 0.10 630dqsub1127 subtract 130E-2 1E0 -> 0.30 631dqsub1128 subtract 1E2 1E4 -> -9.9E+3 632 633-- Null tests 634dqsub9990 subtract 10 # -> NaN Invalid_operation 635dqsub9991 subtract # 10 -> NaN Invalid_operation 636